WebSVN – FuelGauge – Blame – /trunk/Drivers/STM32F0xx_HAL_Driver/Src/stm32f0xx_hal_smbus.c

Rev	Author	Line No.	Line
2	mjames	1	/**
		2	******************************************************************************
		3	* @file stm32f0xx_hal_smbus.c
		4	* @author MCD Application Team
		5	* @brief SMBUS HAL module driver.
		6	* This file provides firmware functions to manage the following
		7	* functionalities of the System Management Bus (SMBus) peripheral,
		8	* based on I2C principles of operation :
		9	* + Initialization and de-initialization functions
		10	* + IO operation functions
		11	* + Peripheral State and Errors functions
		12	*
		13	@verbatim
		14	==============================================================================
		15	##### How to use this driver #####
		16	==============================================================================
		17	[..]
		18	The SMBUS HAL driver can be used as follows:
		19
		20	(#) Declare a SMBUS_HandleTypeDef handle structure, for example:
		21	SMBUS_HandleTypeDef hsmbus;
		22
6	mjames	23	(#)Initialize the SMBUS low level resources by implementing the HAL_SMBUS_MspInit() API:
2	mjames	24	(##) Enable the SMBUSx interface clock
		25	(##) SMBUS pins configuration
		26	(+++) Enable the clock for the SMBUS GPIOs
		27	(+++) Configure SMBUS pins as alternate function open-drain
		28	(##) NVIC configuration if you need to use interrupt process
		29	(+++) Configure the SMBUSx interrupt priority
		30	(+++) Enable the NVIC SMBUS IRQ Channel
		31
		32	(#) Configure the Communication Clock Timing, Bus Timeout, Own Address1, Master Addressing mode,
		33	Dual Addressing mode, Own Address2, Own Address2 Mask, General call, Nostretch mode,
		34	Peripheral mode and Packet Error Check mode in the hsmbus Init structure.
		35
6	mjames	36	(#) Initialize the SMBUS registers by calling the HAL_SMBUS_Init() API:
2	mjames	37	(++) These API's configures also the low level Hardware GPIO, CLOCK, CORTEX...etc)
6	mjames	38	by calling the customized HAL_SMBUS_MspInit(&hsmbus) API.
2	mjames	39
6	mjames	40	(#) To check if target device is ready for communication, use the function HAL_SMBUS_IsDeviceReady()
2	mjames	41
		42	(#) For SMBUS IO operations, only one mode of operations is available within this driver
		43
		44	* Interrupt mode IO operation *
		45	===================================
		46	[..]
6	mjames	47	(+) Transmit in master/host SMBUS mode an amount of data in non-blocking mode
		48	using HAL_SMBUS_Master_Transmit_IT()
		49	(++) At transmission end of transfer HAL_SMBUS_MasterTxCpltCallback() is executed and users can
		50	add their own code by customization of function pointer HAL_SMBUS_MasterTxCpltCallback()
		51	(+) Receive in master/host SMBUS mode an amount of data in non-blocking mode
		52	using HAL_SMBUS_Master_Receive_IT()
		53	(++) At reception end of transfer HAL_SMBUS_MasterRxCpltCallback() is executed and users can
		54	add their own code by customization of function pointer HAL_SMBUS_MasterRxCpltCallback()
		55	(+) Abort a master/host SMBUS process communication with Interrupt using HAL_SMBUS_Master_Abort_IT()
2	mjames	56	(++) The associated previous transfer callback is called at the end of abort process
6	mjames	57	(++) mean HAL_SMBUS_MasterTxCpltCallback() in case of previous state was master transmit
		58	(++) mean HAL_SMBUS_MasterRxCpltCallback() in case of previous state was master receive
2	mjames	59	(+) Enable/disable the Address listen mode in slave/device or host/slave SMBUS mode
6	mjames	60	using HAL_SMBUS_EnableListen_IT() HAL_SMBUS_DisableListen_IT()
		61	(++) When address slave/device SMBUS match, HAL_SMBUS_AddrCallback() is executed and users can
		62	add their own code to check the Address Match Code and the transmission direction
		63	request by master/host (Write/Read).
		64	(++) At Listen mode end HAL_SMBUS_ListenCpltCallback() is executed and users can
		65	add their own code by customization of function pointer HAL_SMBUS_ListenCpltCallback()
		66	(+) Transmit in slave/device SMBUS mode an amount of data in non-blocking mode
		67	using HAL_SMBUS_Slave_Transmit_IT()
		68	(++) At transmission end of transfer HAL_SMBUS_SlaveTxCpltCallback() is executed and users can
		69	add their own code by customization of function pointer HAL_SMBUS_SlaveTxCpltCallback()
		70	(+) Receive in slave/device SMBUS mode an amount of data in non-blocking mode
		71	using HAL_SMBUS_Slave_Receive_IT()
		72	(++) At reception end of transfer HAL_SMBUS_SlaveRxCpltCallback() is executed and users can
		73	add their own code by customization of function pointer HAL_SMBUS_SlaveRxCpltCallback()
		74	(+) Enable/Disable the SMBUS alert mode using
		75	HAL_SMBUS_EnableAlert_IT() or HAL_SMBUS_DisableAlert_IT()
		76	(++) When SMBUS Alert is generated HAL_SMBUS_ErrorCallback() is executed and users can
		77	add their own code by customization of function pointer HAL_SMBUS_ErrorCallback()
		78	to check the Alert Error Code using function HAL_SMBUS_GetError()
		79	(+) Get HAL state machine or error values using HAL_SMBUS_GetState() or HAL_SMBUS_GetError()
		80	(+) In case of transfer Error, HAL_SMBUS_ErrorCallback() function is executed and users can
		81	add their own code by customization of function pointer HAL_SMBUS_ErrorCallback()
		82	to check the Error Code using function HAL_SMBUS_GetError()
2	mjames	83
		84	* SMBUS HAL driver macros list *
		85	==================================
		86	[..]
		87	Below the list of most used macros in SMBUS HAL driver.
		88
6	mjames	89	(+) __HAL_SMBUS_ENABLE: Enable the SMBUS peripheral
		90	(+) __HAL_SMBUS_DISABLE: Disable the SMBUS peripheral
		91	(+) __HAL_SMBUS_GET_FLAG: Check whether the specified SMBUS flag is set or not
		92	(+) __HAL_SMBUS_CLEAR_FLAG: Clear the specified SMBUS pending flag
		93	(+) __HAL_SMBUS_ENABLE_IT: Enable the specified SMBUS interrupt
		94	(+) __HAL_SMBUS_DISABLE_IT: Disable the specified SMBUS interrupt
2	mjames	95
		96	* Callback registration *
		97	=============================================
		98	[..]
		99	The compilation flag USE_HAL_SMBUS_REGISTER_CALLBACKS when set to 1
		100	allows the user to configure dynamically the driver callbacks.
6	mjames	101	Use Functions HAL_SMBUS_RegisterCallback() or HAL_SMBUS_RegisterAddrCallback()
2	mjames	102	to register an interrupt callback.
		103	[..]
6	mjames	104	Function HAL_SMBUS_RegisterCallback() allows to register following callbacks:
2	mjames	105	(+) MasterTxCpltCallback : callback for Master transmission end of transfer.
		106	(+) MasterRxCpltCallback : callback for Master reception end of transfer.
		107	(+) SlaveTxCpltCallback : callback for Slave transmission end of transfer.
		108	(+) SlaveRxCpltCallback : callback for Slave reception end of transfer.
		109	(+) ListenCpltCallback : callback for end of listen mode.
		110	(+) ErrorCallback : callback for error detection.
		111	(+) MspInitCallback : callback for Msp Init.
		112	(+) MspDeInitCallback : callback for Msp DeInit.
		113	This function takes as parameters the HAL peripheral handle, the Callback ID
		114	and a pointer to the user callback function.
		115	[..]
6	mjames	116	For specific callback AddrCallback use dedicated register callbacks : HAL_SMBUS_RegisterAddrCallback.
2	mjames	117	[..]
6	mjames	118	Use function HAL_SMBUS_UnRegisterCallback to reset a callback to the default
2	mjames	119	weak function.
6	mjames	120	HAL_SMBUS_UnRegisterCallback takes as parameters the HAL peripheral handle,
2	mjames	121	and the Callback ID.
		122	This function allows to reset following callbacks:
		123	(+) MasterTxCpltCallback : callback for Master transmission end of transfer.
		124	(+) MasterRxCpltCallback : callback for Master reception end of transfer.
		125	(+) SlaveTxCpltCallback : callback for Slave transmission end of transfer.
		126	(+) SlaveRxCpltCallback : callback for Slave reception end of transfer.
		127	(+) ListenCpltCallback : callback for end of listen mode.
		128	(+) ErrorCallback : callback for error detection.
		129	(+) MspInitCallback : callback for Msp Init.
		130	(+) MspDeInitCallback : callback for Msp DeInit.
		131	[..]
6	mjames	132	For callback AddrCallback use dedicated register callbacks : HAL_SMBUS_UnRegisterAddrCallback.
2	mjames	133	[..]
6	mjames	134	By default, after the HAL_SMBUS_Init() and when the state is HAL_I2C_STATE_RESET
2	mjames	135	all callbacks are set to the corresponding weak functions:
6	mjames	136	examples HAL_SMBUS_MasterTxCpltCallback(), HAL_SMBUS_MasterRxCpltCallback().
2	mjames	137	Exception done for MspInit and MspDeInit functions that are
6	mjames	138	reset to the legacy weak functions in the HAL_SMBUS_Init()/ HAL_SMBUS_DeInit() only when
2	mjames	139	these callbacks are null (not registered beforehand).
6	mjames	140	If MspInit or MspDeInit are not null, the HAL_SMBUS_Init()/ HAL_SMBUS_DeInit()
2	mjames	141	keep and use the user MspInit/MspDeInit callbacks (registered beforehand) whatever the state.
		142	[..]
6	mjames	143	Callbacks can be registered/unregistered in HAL_I2C_STATE_READY state only.
2	mjames	144	Exception done MspInit/MspDeInit functions that can be registered/unregistered
6	mjames	145	in HAL_I2C_STATE_READY or HAL_I2C_STATE_RESET state,
2	mjames	146	thus registered (user) MspInit/DeInit callbacks can be used during the Init/DeInit.
		147	Then, the user first registers the MspInit/MspDeInit user callbacks
6	mjames	148	using HAL_SMBUS_RegisterCallback() before calling HAL_SMBUS_DeInit()
		149	or HAL_SMBUS_Init() function.
2	mjames	150	[..]
		151	When the compilation flag USE_HAL_SMBUS_REGISTER_CALLBACKS is set to 0 or
		152	not defined, the callback registration feature is not available and all callbacks
		153	are set to the corresponding weak functions.
		154
		155	[..]
		156	(@) You can refer to the SMBUS HAL driver header file for more useful macros
		157
		158	@endverbatim
		159	******************************************************************************
		160	* @attention
		161	*
		162	* <h2><center>© Copyright (c) 2016 STMicroelectronics.
		163	* All rights reserved.</center></h2>
		164	*
		165	* This software component is licensed by ST under BSD 3-Clause license,
		166	* the "License"; You may not use this file except in compliance with the
		167	* License. You may obtain a copy of the License at:
		168	* opensource.org/licenses/BSD-3-Clause
		169	*
		170	******************************************************************************
		171	*/
		172
		173	/* Includes ------------------------------------------------------------------*/
		174	#include "stm32f0xx_hal.h"
		175
		176	/** @addtogroup STM32F0xx_HAL_Driver
		177	* @{
		178	*/
		179
		180	/** @defgroup SMBUS SMBUS
		181	* @brief SMBUS HAL module driver
		182	* @{
		183	*/
		184
		185	#ifdef HAL_SMBUS_MODULE_ENABLED
		186
		187	/* Private typedef -----------------------------------------------------------*/
		188	/* Private constants ---------------------------------------------------------*/
		189	/** @defgroup SMBUS_Private_Define SMBUS Private Constants
		190	* @{
		191	*/
		192	#define TIMING_CLEAR_MASK (0xF0FFFFFFUL) /!< SMBUS TIMING clear register Mask /
		193	#define HAL_TIMEOUT_ADDR (10000U) /!< 10 s /
		194	#define HAL_TIMEOUT_BUSY (25U) /!< 25 ms /
		195	#define HAL_TIMEOUT_DIR (25U) /!< 25 ms /
		196	#define HAL_TIMEOUT_RXNE (25U) /!< 25 ms /
		197	#define HAL_TIMEOUT_STOPF (25U) /!< 25 ms /
		198	#define HAL_TIMEOUT_TC (25U) /!< 25 ms /
		199	#define HAL_TIMEOUT_TCR (25U) /!< 25 ms /
		200	#define HAL_TIMEOUT_TXIS (25U) /!< 25 ms /
		201	#define MAX_NBYTE_SIZE 255U
		202	/**
		203	* @}
		204	*/
		205
		206	/* Private macro -------------------------------------------------------------*/
		207	/* Private variables ---------------------------------------------------------*/
		208	/* Private function prototypes -----------------------------------------------*/
		209	/** @addtogroup SMBUS_Private_Functions SMBUS Private Functions
		210	* @{
		211	*/
6	mjames	212	static HAL_StatusTypeDef SMBUS_WaitOnFlagUntilTimeout(SMBUS_HandleTypeDef *hsmbus, uint32_t Flag,
		213	FlagStatus Status, uint32_t Timeout);
2	mjames	214
6	mjames	215	static void SMBUS_Enable_IRQ(SMBUS_HandleTypeDef *hsmbus, uint32_t InterruptRequest);
		216	static void SMBUS_Disable_IRQ(SMBUS_HandleTypeDef *hsmbus, uint32_t InterruptRequest);
		217	static HAL_StatusTypeDef SMBUS_Master_ISR(SMBUS_HandleTypeDef *hsmbus, uint32_t StatusFlags);
		218	static HAL_StatusTypeDef SMBUS_Slave_ISR(SMBUS_HandleTypeDef *hsmbus, uint32_t StatusFlags);
2	mjames	219
6	mjames	220	static void SMBUS_ConvertOtherXferOptions(SMBUS_HandleTypeDef *hsmbus);
2	mjames	221
6	mjames	222	static void SMBUS_ITErrorHandler(SMBUS_HandleTypeDef *hsmbus);
2	mjames	223
6	mjames	224	static void SMBUS_TransferConfig(SMBUS_HandleTypeDef *hsmbus, uint16_t DevAddress, uint8_t Size,
		225	uint32_t Mode, uint32_t Request);
2	mjames	226	/**
		227	* @}
		228	*/
		229
		230	/* Exported functions --------------------------------------------------------*/
		231
		232	/** @defgroup SMBUS_Exported_Functions SMBUS Exported Functions
		233	* @{
		234	*/
		235
		236	/** @defgroup SMBUS_Exported_Functions_Group1 Initialization and de-initialization functions
6	mjames	237	* @brief Initialization and Configuration functions
		238	*
2	mjames	239	@verbatim
		240	===============================================================================
		241	##### Initialization and de-initialization functions #####
		242	===============================================================================
		243	[..] This subsection provides a set of functions allowing to initialize and
		244	deinitialize the SMBUSx peripheral:
		245
		246	(+) User must Implement HAL_SMBUS_MspInit() function in which he configures
		247	all related peripherals resources (CLOCK, GPIO, IT and NVIC ).
		248
		249	(+) Call the function HAL_SMBUS_Init() to configure the selected device with
		250	the selected configuration:
		251	(++) Clock Timing
		252	(++) Bus Timeout
		253	(++) Analog Filer mode
		254	(++) Own Address 1
		255	(++) Addressing mode (Master, Slave)
		256	(++) Dual Addressing mode
		257	(++) Own Address 2
		258	(++) Own Address 2 Mask
		259	(++) General call mode
		260	(++) Nostretch mode
		261	(++) Packet Error Check mode
		262	(++) Peripheral mode
		263
		264
		265	(+) Call the function HAL_SMBUS_DeInit() to restore the default configuration
		266	of the selected SMBUSx peripheral.
		267
		268	(+) Enable/Disable Analog/Digital filters with HAL_SMBUS_ConfigAnalogFilter() and
		269	HAL_SMBUS_ConfigDigitalFilter().
		270
		271	@endverbatim
		272	* @{
		273	*/
		274
		275	/**
		276	* @brief Initialize the SMBUS according to the specified parameters
		277	* in the SMBUS_InitTypeDef and initialize the associated handle.
		278	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		279	* the configuration information for the specified SMBUS.
		280	* @retval HAL status
		281	*/
		282	HAL_StatusTypeDef HAL_SMBUS_Init(SMBUS_HandleTypeDef *hsmbus)
		283	{
		284	/* Check the SMBUS handle allocation */
		285	if (hsmbus == NULL)
		286	{
		287	return HAL_ERROR;
		288	}
		289
		290	/* Check the parameters */
		291	assert_param(IS_SMBUS_ALL_INSTANCE(hsmbus->Instance));
		292	assert_param(IS_SMBUS_ANALOG_FILTER(hsmbus->Init.AnalogFilter));
		293	assert_param(IS_SMBUS_OWN_ADDRESS1(hsmbus->Init.OwnAddress1));
		294	assert_param(IS_SMBUS_ADDRESSING_MODE(hsmbus->Init.AddressingMode));
		295	assert_param(IS_SMBUS_DUAL_ADDRESS(hsmbus->Init.DualAddressMode));
		296	assert_param(IS_SMBUS_OWN_ADDRESS2(hsmbus->Init.OwnAddress2));
		297	assert_param(IS_SMBUS_OWN_ADDRESS2_MASK(hsmbus->Init.OwnAddress2Masks));
		298	assert_param(IS_SMBUS_GENERAL_CALL(hsmbus->Init.GeneralCallMode));
		299	assert_param(IS_SMBUS_NO_STRETCH(hsmbus->Init.NoStretchMode));
		300	assert_param(IS_SMBUS_PEC(hsmbus->Init.PacketErrorCheckMode));
		301	assert_param(IS_SMBUS_PERIPHERAL_MODE(hsmbus->Init.PeripheralMode));
		302
		303	if (hsmbus->State == HAL_SMBUS_STATE_RESET)
		304	{
		305	/* Allocate lock resource and initialize it */
		306	hsmbus->Lock = HAL_UNLOCKED;
		307
		308	#if (USE_HAL_SMBUS_REGISTER_CALLBACKS == 1)
		309	hsmbus->MasterTxCpltCallback = HAL_SMBUS_MasterTxCpltCallback; /* Legacy weak MasterTxCpltCallback */
		310	hsmbus->MasterRxCpltCallback = HAL_SMBUS_MasterRxCpltCallback; /* Legacy weak MasterRxCpltCallback */
		311	hsmbus->SlaveTxCpltCallback = HAL_SMBUS_SlaveTxCpltCallback; /* Legacy weak SlaveTxCpltCallback */
		312	hsmbus->SlaveRxCpltCallback = HAL_SMBUS_SlaveRxCpltCallback; /* Legacy weak SlaveRxCpltCallback */
		313	hsmbus->ListenCpltCallback = HAL_SMBUS_ListenCpltCallback; /* Legacy weak ListenCpltCallback */
		314	hsmbus->ErrorCallback = HAL_SMBUS_ErrorCallback; /* Legacy weak ErrorCallback */
		315	hsmbus->AddrCallback = HAL_SMBUS_AddrCallback; /* Legacy weak AddrCallback */
		316
		317	if (hsmbus->MspInitCallback == NULL)
		318	{
		319	hsmbus->MspInitCallback = HAL_SMBUS_MspInit; /* Legacy weak MspInit */
		320	}
		321
		322	/* Init the low level hardware : GPIO, CLOCK, CORTEX...etc */
		323	hsmbus->MspInitCallback(hsmbus);
		324	#else
		325	/* Init the low level hardware : GPIO, CLOCK, NVIC */
		326	HAL_SMBUS_MspInit(hsmbus);
		327	#endif /* USE_HAL_SMBUS_REGISTER_CALLBACKS */
		328	}
		329
		330	hsmbus->State = HAL_SMBUS_STATE_BUSY;
		331
		332	/* Disable the selected SMBUS peripheral */
		333	__HAL_SMBUS_DISABLE(hsmbus);
		334
		335	/---------------------------- SMBUSx TIMINGR Configuration ------------------------/
		336	/* Configure SMBUSx: Frequency range */
		337	hsmbus->Instance->TIMINGR = hsmbus->Init.Timing & TIMING_CLEAR_MASK;
		338
		339	/---------------------------- SMBUSx TIMEOUTR Configuration ------------------------/
		340	/* Configure SMBUSx: Bus Timeout */
		341	hsmbus->Instance->TIMEOUTR &= ~I2C_TIMEOUTR_TIMOUTEN;
		342	hsmbus->Instance->TIMEOUTR &= ~I2C_TIMEOUTR_TEXTEN;
		343	hsmbus->Instance->TIMEOUTR = hsmbus->Init.SMBusTimeout;
		344
		345	/---------------------------- SMBUSx OAR1 Configuration -----------------------/
		346	/* Configure SMBUSx: Own Address1 and ack own address1 mode */
		347	hsmbus->Instance->OAR1 &= ~I2C_OAR1_OA1EN;
		348
		349	if (hsmbus->Init.OwnAddress1 != 0UL)
		350	{
		351	if (hsmbus->Init.AddressingMode == SMBUS_ADDRESSINGMODE_7BIT)
		352	{
		353	hsmbus->Instance->OAR1 = (I2C_OAR1_OA1EN \| hsmbus->Init.OwnAddress1);
		354	}
		355	else /* SMBUS_ADDRESSINGMODE_10BIT */
		356	{
		357	hsmbus->Instance->OAR1 = (I2C_OAR1_OA1EN \| I2C_OAR1_OA1MODE \| hsmbus->Init.OwnAddress1);
		358	}
		359	}
		360
		361	/---------------------------- SMBUSx CR2 Configuration ------------------------/
		362	/* Configure SMBUSx: Addressing Master mode */
		363	if (hsmbus->Init.AddressingMode == SMBUS_ADDRESSINGMODE_10BIT)
		364	{
		365	hsmbus->Instance->CR2 = (I2C_CR2_ADD10);
		366	}
		367	/* Enable the AUTOEND by default, and enable NACK (should be disable only during Slave process) */
		368	/* AUTOEND and NACK bit will be manage during Transfer process */
		369	hsmbus->Instance->CR2 \|= (I2C_CR2_AUTOEND \| I2C_CR2_NACK);
		370
		371	/---------------------------- SMBUSx OAR2 Configuration -----------------------/
		372	/* Configure SMBUSx: Dual mode and Own Address2 */
6	mjames	373	hsmbus->Instance->OAR2 = (hsmbus->Init.DualAddressMode \| hsmbus->Init.OwnAddress2 \| \
		374	(hsmbus->Init.OwnAddress2Masks << 8U));
2	mjames	375
		376	/---------------------------- SMBUSx CR1 Configuration ------------------------/
		377	/* Configure SMBUSx: Generalcall and NoStretch mode */
6	mjames	378	hsmbus->Instance->CR1 = (hsmbus->Init.GeneralCallMode \| hsmbus->Init.NoStretchMode \| \
		379	hsmbus->Init.PacketErrorCheckMode \| hsmbus->Init.PeripheralMode \| \
		380	hsmbus->Init.AnalogFilter);
2	mjames	381
6	mjames	382	/* Enable Slave Byte Control only in case of Packet Error Check is enabled
		383	and SMBUS Peripheral is set in Slave mode */
		384	if ((hsmbus->Init.PacketErrorCheckMode == SMBUS_PEC_ENABLE) && \
		385	((hsmbus->Init.PeripheralMode == SMBUS_PERIPHERAL_MODE_SMBUS_SLAVE) \|\| \
		386	(hsmbus->Init.PeripheralMode == SMBUS_PERIPHERAL_MODE_SMBUS_SLAVE_ARP)))
2	mjames	387	{
		388	hsmbus->Instance->CR1 \|= I2C_CR1_SBC;
		389	}
		390
		391	/* Enable the selected SMBUS peripheral */
		392	__HAL_SMBUS_ENABLE(hsmbus);
		393
		394	hsmbus->ErrorCode = HAL_SMBUS_ERROR_NONE;
		395	hsmbus->PreviousState = HAL_SMBUS_STATE_READY;
		396	hsmbus->State = HAL_SMBUS_STATE_READY;
		397
		398	return HAL_OK;
		399	}
		400
		401	/**
		402	* @brief DeInitialize the SMBUS peripheral.
		403	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		404	* the configuration information for the specified SMBUS.
		405	* @retval HAL status
		406	*/
		407	HAL_StatusTypeDef HAL_SMBUS_DeInit(SMBUS_HandleTypeDef *hsmbus)
		408	{
		409	/* Check the SMBUS handle allocation */
		410	if (hsmbus == NULL)
		411	{
		412	return HAL_ERROR;
		413	}
		414
		415	/* Check the parameters */
		416	assert_param(IS_SMBUS_ALL_INSTANCE(hsmbus->Instance));
		417
		418	hsmbus->State = HAL_SMBUS_STATE_BUSY;
		419
		420	/* Disable the SMBUS Peripheral Clock */
		421	__HAL_SMBUS_DISABLE(hsmbus);
		422
		423	#if (USE_HAL_SMBUS_REGISTER_CALLBACKS == 1)
		424	if (hsmbus->MspDeInitCallback == NULL)
		425	{
		426	hsmbus->MspDeInitCallback = HAL_SMBUS_MspDeInit; /* Legacy weak MspDeInit */
		427	}
		428
		429	/* DeInit the low level hardware: GPIO, CLOCK, NVIC */
		430	hsmbus->MspDeInitCallback(hsmbus);
		431	#else
		432	/* DeInit the low level hardware: GPIO, CLOCK, NVIC */
		433	HAL_SMBUS_MspDeInit(hsmbus);
		434	#endif /* USE_HAL_SMBUS_REGISTER_CALLBACKS */
		435
		436	hsmbus->ErrorCode = HAL_SMBUS_ERROR_NONE;
		437	hsmbus->PreviousState = HAL_SMBUS_STATE_RESET;
		438	hsmbus->State = HAL_SMBUS_STATE_RESET;
		439
		440	/* Release Lock */
		441	__HAL_UNLOCK(hsmbus);
		442
		443	return HAL_OK;
		444	}
		445
		446	/**
		447	* @brief Initialize the SMBUS MSP.
		448	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		449	* the configuration information for the specified SMBUS.
		450	* @retval None
		451	*/
		452	__weak void HAL_SMBUS_MspInit(SMBUS_HandleTypeDef *hsmbus)
		453	{
		454	/* Prevent unused argument(s) compilation warning */
		455	UNUSED(hsmbus);
		456
		457	/* NOTE : This function should not be modified, when the callback is needed,
		458	the HAL_SMBUS_MspInit could be implemented in the user file
		459	*/
		460	}
		461
		462	/**
		463	* @brief DeInitialize the SMBUS MSP.
		464	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		465	* the configuration information for the specified SMBUS.
		466	* @retval None
		467	*/
		468	__weak void HAL_SMBUS_MspDeInit(SMBUS_HandleTypeDef *hsmbus)
		469	{
		470	/* Prevent unused argument(s) compilation warning */
		471	UNUSED(hsmbus);
		472
		473	/* NOTE : This function should not be modified, when the callback is needed,
		474	the HAL_SMBUS_MspDeInit could be implemented in the user file
		475	*/
		476	}
		477
		478	/**
		479	* @brief Configure Analog noise filter.
		480	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		481	* the configuration information for the specified SMBUS.
		482	* @param AnalogFilter This parameter can be one of the following values:
		483	* @arg @ref SMBUS_ANALOGFILTER_ENABLE
		484	* @arg @ref SMBUS_ANALOGFILTER_DISABLE
		485	* @retval HAL status
		486	*/
		487	HAL_StatusTypeDef HAL_SMBUS_ConfigAnalogFilter(SMBUS_HandleTypeDef *hsmbus, uint32_t AnalogFilter)
		488	{
		489	/* Check the parameters */
		490	assert_param(IS_SMBUS_ALL_INSTANCE(hsmbus->Instance));
		491	assert_param(IS_SMBUS_ANALOG_FILTER(AnalogFilter));
		492
		493	if (hsmbus->State == HAL_SMBUS_STATE_READY)
		494	{
		495	/* Process Locked */
		496	__HAL_LOCK(hsmbus);
		497
		498	hsmbus->State = HAL_SMBUS_STATE_BUSY;
		499
		500	/* Disable the selected SMBUS peripheral */
		501	__HAL_SMBUS_DISABLE(hsmbus);
		502
		503	/* Reset ANOFF bit */
		504	hsmbus->Instance->CR1 &= ~(I2C_CR1_ANFOFF);
		505
		506	/* Set analog filter bit*/
		507	hsmbus->Instance->CR1 \|= AnalogFilter;
		508
		509	__HAL_SMBUS_ENABLE(hsmbus);
		510
		511	hsmbus->State = HAL_SMBUS_STATE_READY;
		512
		513	/* Process Unlocked */
		514	__HAL_UNLOCK(hsmbus);
		515
		516	return HAL_OK;
		517	}
		518	else
		519	{
		520	return HAL_BUSY;
		521	}
		522	}
		523
		524	/**
		525	* @brief Configure Digital noise filter.
		526	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		527	* the configuration information for the specified SMBUS.
		528	* @param DigitalFilter Coefficient of digital noise filter between Min_Data=0x00 and Max_Data=0x0F.
		529	* @retval HAL status
		530	*/
		531	HAL_StatusTypeDef HAL_SMBUS_ConfigDigitalFilter(SMBUS_HandleTypeDef *hsmbus, uint32_t DigitalFilter)
		532	{
		533	uint32_t tmpreg;
		534
		535	/* Check the parameters */
		536	assert_param(IS_SMBUS_ALL_INSTANCE(hsmbus->Instance));
		537	assert_param(IS_SMBUS_DIGITAL_FILTER(DigitalFilter));
		538
		539	if (hsmbus->State == HAL_SMBUS_STATE_READY)
		540	{
		541	/* Process Locked */
		542	__HAL_LOCK(hsmbus);
		543
		544	hsmbus->State = HAL_SMBUS_STATE_BUSY;
		545
		546	/* Disable the selected SMBUS peripheral */
		547	__HAL_SMBUS_DISABLE(hsmbus);
		548
		549	/* Get the old register value */
		550	tmpreg = hsmbus->Instance->CR1;
		551
		552	/* Reset I2C DNF bits [11:8] */
		553	tmpreg &= ~(I2C_CR1_DNF);
		554
		555	/* Set I2Cx DNF coefficient */
		556	tmpreg \|= DigitalFilter << I2C_CR1_DNF_Pos;
		557
		558	/* Store the new register value */
		559	hsmbus->Instance->CR1 = tmpreg;
		560
		561	__HAL_SMBUS_ENABLE(hsmbus);
		562
		563	hsmbus->State = HAL_SMBUS_STATE_READY;
		564
		565	/* Process Unlocked */
		566	__HAL_UNLOCK(hsmbus);
		567
		568	return HAL_OK;
		569	}
		570	else
		571	{
		572	return HAL_BUSY;
		573	}
		574	}
		575
		576	#if (USE_HAL_SMBUS_REGISTER_CALLBACKS == 1)
		577	/**
		578	* @brief Register a User SMBUS Callback
		579	* To be used instead of the weak predefined callback
		580	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		581	* the configuration information for the specified SMBUS.
		582	* @param CallbackID ID of the callback to be registered
		583	* This parameter can be one of the following values:
		584	* @arg @ref HAL_SMBUS_MASTER_TX_COMPLETE_CB_ID Master Tx Transfer completed callback ID
		585	* @arg @ref HAL_SMBUS_MASTER_RX_COMPLETE_CB_ID Master Rx Transfer completed callback ID
		586	* @arg @ref HAL_SMBUS_SLAVE_TX_COMPLETE_CB_ID Slave Tx Transfer completed callback ID
		587	* @arg @ref HAL_SMBUS_SLAVE_RX_COMPLETE_CB_ID Slave Rx Transfer completed callback ID
		588	* @arg @ref HAL_SMBUS_LISTEN_COMPLETE_CB_ID Listen Complete callback ID
		589	* @arg @ref HAL_SMBUS_ERROR_CB_ID Error callback ID
		590	* @arg @ref HAL_SMBUS_MSPINIT_CB_ID MspInit callback ID
		591	* @arg @ref HAL_SMBUS_MSPDEINIT_CB_ID MspDeInit callback ID
		592	* @param pCallback pointer to the Callback function
		593	* @retval HAL status
		594	*/
6	mjames	595	HAL_StatusTypeDef HAL_SMBUS_RegisterCallback(SMBUS_HandleTypeDef *hsmbus,
		596	HAL_SMBUS_CallbackIDTypeDef CallbackID,
		597	pSMBUS_CallbackTypeDef pCallback)
2	mjames	598	{
		599	HAL_StatusTypeDef status = HAL_OK;
		600
		601	if (pCallback == NULL)
		602	{
		603	/* Update the error code */
		604	hsmbus->ErrorCode \|= HAL_SMBUS_ERROR_INVALID_CALLBACK;
		605
		606	return HAL_ERROR;
		607	}
		608
		609	/* Process locked */
		610	__HAL_LOCK(hsmbus);
		611
		612	if (HAL_SMBUS_STATE_READY == hsmbus->State)
		613	{
		614	switch (CallbackID)
		615	{
		616	case HAL_SMBUS_MASTER_TX_COMPLETE_CB_ID :
		617	hsmbus->MasterTxCpltCallback = pCallback;
		618	break;
		619
		620	case HAL_SMBUS_MASTER_RX_COMPLETE_CB_ID :
		621	hsmbus->MasterRxCpltCallback = pCallback;
		622	break;
		623
		624	case HAL_SMBUS_SLAVE_TX_COMPLETE_CB_ID :
		625	hsmbus->SlaveTxCpltCallback = pCallback;
		626	break;
		627
		628	case HAL_SMBUS_SLAVE_RX_COMPLETE_CB_ID :
		629	hsmbus->SlaveRxCpltCallback = pCallback;
		630	break;
		631
		632	case HAL_SMBUS_LISTEN_COMPLETE_CB_ID :
		633	hsmbus->ListenCpltCallback = pCallback;
		634	break;
		635
		636	case HAL_SMBUS_ERROR_CB_ID :
		637	hsmbus->ErrorCallback = pCallback;
		638	break;
		639
		640	case HAL_SMBUS_MSPINIT_CB_ID :
		641	hsmbus->MspInitCallback = pCallback;
		642	break;
		643
		644	case HAL_SMBUS_MSPDEINIT_CB_ID :
		645	hsmbus->MspDeInitCallback = pCallback;
		646	break;
		647
		648	default :
		649	/* Update the error code */
		650	hsmbus->ErrorCode \|= HAL_SMBUS_ERROR_INVALID_CALLBACK;
		651
		652	/* Return error status */
		653	status = HAL_ERROR;
		654	break;
		655	}
		656	}
		657	else if (HAL_SMBUS_STATE_RESET == hsmbus->State)
		658	{
		659	switch (CallbackID)
		660	{
		661	case HAL_SMBUS_MSPINIT_CB_ID :
		662	hsmbus->MspInitCallback = pCallback;
		663	break;
		664
		665	case HAL_SMBUS_MSPDEINIT_CB_ID :
		666	hsmbus->MspDeInitCallback = pCallback;
		667	break;
		668
		669	default :
		670	/* Update the error code */
		671	hsmbus->ErrorCode \|= HAL_SMBUS_ERROR_INVALID_CALLBACK;
		672
		673	/* Return error status */
		674	status = HAL_ERROR;
		675	break;
		676	}
		677	}
		678	else
		679	{
		680	/* Update the error code */
		681	hsmbus->ErrorCode \|= HAL_SMBUS_ERROR_INVALID_CALLBACK;
		682
		683	/* Return error status */
		684	status = HAL_ERROR;
		685	}
		686
		687	/* Release Lock */
		688	__HAL_UNLOCK(hsmbus);
		689	return status;
		690	}
		691
		692	/**
		693	* @brief Unregister an SMBUS Callback
		694	* SMBUS callback is redirected to the weak predefined callback
		695	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		696	* the configuration information for the specified SMBUS.
		697	* @param CallbackID ID of the callback to be unregistered
		698	* This parameter can be one of the following values:
		699	* This parameter can be one of the following values:
		700	* @arg @ref HAL_SMBUS_MASTER_TX_COMPLETE_CB_ID Master Tx Transfer completed callback ID
		701	* @arg @ref HAL_SMBUS_MASTER_RX_COMPLETE_CB_ID Master Rx Transfer completed callback ID
		702	* @arg @ref HAL_SMBUS_SLAVE_TX_COMPLETE_CB_ID Slave Tx Transfer completed callback ID
		703	* @arg @ref HAL_SMBUS_SLAVE_RX_COMPLETE_CB_ID Slave Rx Transfer completed callback ID
		704	* @arg @ref HAL_SMBUS_LISTEN_COMPLETE_CB_ID Listen Complete callback ID
		705	* @arg @ref HAL_SMBUS_ERROR_CB_ID Error callback ID
		706	* @arg @ref HAL_SMBUS_MSPINIT_CB_ID MspInit callback ID
		707	* @arg @ref HAL_SMBUS_MSPDEINIT_CB_ID MspDeInit callback ID
		708	* @retval HAL status
		709	*/
6	mjames	710	HAL_StatusTypeDef HAL_SMBUS_UnRegisterCallback(SMBUS_HandleTypeDef *hsmbus,
		711	HAL_SMBUS_CallbackIDTypeDef CallbackID)
2	mjames	712	{
		713	HAL_StatusTypeDef status = HAL_OK;
		714
		715	/* Process locked */
		716	__HAL_LOCK(hsmbus);
		717
		718	if (HAL_SMBUS_STATE_READY == hsmbus->State)
		719	{
		720	switch (CallbackID)
		721	{
		722	case HAL_SMBUS_MASTER_TX_COMPLETE_CB_ID :
		723	hsmbus->MasterTxCpltCallback = HAL_SMBUS_MasterTxCpltCallback; /* Legacy weak MasterTxCpltCallback */
		724	break;
		725
		726	case HAL_SMBUS_MASTER_RX_COMPLETE_CB_ID :
		727	hsmbus->MasterRxCpltCallback = HAL_SMBUS_MasterRxCpltCallback; /* Legacy weak MasterRxCpltCallback */
		728	break;
		729
		730	case HAL_SMBUS_SLAVE_TX_COMPLETE_CB_ID :
		731	hsmbus->SlaveTxCpltCallback = HAL_SMBUS_SlaveTxCpltCallback; /* Legacy weak SlaveTxCpltCallback */
		732	break;
		733
		734	case HAL_SMBUS_SLAVE_RX_COMPLETE_CB_ID :
		735	hsmbus->SlaveRxCpltCallback = HAL_SMBUS_SlaveRxCpltCallback; /* Legacy weak SlaveRxCpltCallback */
		736	break;
		737
		738	case HAL_SMBUS_LISTEN_COMPLETE_CB_ID :
		739	hsmbus->ListenCpltCallback = HAL_SMBUS_ListenCpltCallback; /* Legacy weak ListenCpltCallback */
		740	break;
		741
		742	case HAL_SMBUS_ERROR_CB_ID :
		743	hsmbus->ErrorCallback = HAL_SMBUS_ErrorCallback; /* Legacy weak ErrorCallback */
		744	break;
		745
		746	case HAL_SMBUS_MSPINIT_CB_ID :
		747	hsmbus->MspInitCallback = HAL_SMBUS_MspInit; /* Legacy weak MspInit */
		748	break;
		749
		750	case HAL_SMBUS_MSPDEINIT_CB_ID :
		751	hsmbus->MspDeInitCallback = HAL_SMBUS_MspDeInit; /* Legacy weak MspDeInit */
		752	break;
		753
		754	default :
		755	/* Update the error code */
		756	hsmbus->ErrorCode \|= HAL_SMBUS_ERROR_INVALID_CALLBACK;
		757
		758	/* Return error status */
		759	status = HAL_ERROR;
		760	break;
		761	}
		762	}
		763	else if (HAL_SMBUS_STATE_RESET == hsmbus->State)
		764	{
		765	switch (CallbackID)
		766	{
		767	case HAL_SMBUS_MSPINIT_CB_ID :
		768	hsmbus->MspInitCallback = HAL_SMBUS_MspInit; /* Legacy weak MspInit */
		769	break;
		770
		771	case HAL_SMBUS_MSPDEINIT_CB_ID :
		772	hsmbus->MspDeInitCallback = HAL_SMBUS_MspDeInit; /* Legacy weak MspDeInit */
		773	break;
		774
		775	default :
		776	/* Update the error code */
		777	hsmbus->ErrorCode \|= HAL_SMBUS_ERROR_INVALID_CALLBACK;
		778
		779	/* Return error status */
		780	status = HAL_ERROR;
		781	break;
		782	}
		783	}
		784	else
		785	{
		786	/* Update the error code */
		787	hsmbus->ErrorCode \|= HAL_SMBUS_ERROR_INVALID_CALLBACK;
		788
		789	/* Return error status */
		790	status = HAL_ERROR;
		791	}
		792
		793	/* Release Lock */
		794	__HAL_UNLOCK(hsmbus);
		795	return status;
		796	}
		797
		798	/**
		799	* @brief Register the Slave Address Match SMBUS Callback
		800	* To be used instead of the weak HAL_SMBUS_AddrCallback() predefined callback
		801	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		802	* the configuration information for the specified SMBUS.
		803	* @param pCallback pointer to the Address Match Callback function
		804	* @retval HAL status
		805	*/
6	mjames	806	HAL_StatusTypeDef HAL_SMBUS_RegisterAddrCallback(SMBUS_HandleTypeDef *hsmbus,
		807	pSMBUS_AddrCallbackTypeDef pCallback)
2	mjames	808	{
		809	HAL_StatusTypeDef status = HAL_OK;
		810
		811	if (pCallback == NULL)
		812	{
		813	/* Update the error code */
		814	hsmbus->ErrorCode \|= HAL_SMBUS_ERROR_INVALID_CALLBACK;
		815
		816	return HAL_ERROR;
		817	}
		818	/* Process locked */
		819	__HAL_LOCK(hsmbus);
		820
		821	if (HAL_SMBUS_STATE_READY == hsmbus->State)
		822	{
		823	hsmbus->AddrCallback = pCallback;
		824	}
		825	else
		826	{
		827	/* Update the error code */
		828	hsmbus->ErrorCode \|= HAL_SMBUS_ERROR_INVALID_CALLBACK;
		829
		830	/* Return error status */
		831	status = HAL_ERROR;
		832	}
		833
		834	/* Release Lock */
		835	__HAL_UNLOCK(hsmbus);
		836	return status;
		837	}
		838
		839	/**
		840	* @brief UnRegister the Slave Address Match SMBUS Callback
		841	* Info Ready SMBUS Callback is redirected to the weak HAL_SMBUS_AddrCallback() predefined callback
		842	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		843	* the configuration information for the specified SMBUS.
		844	* @retval HAL status
		845	*/
		846	HAL_StatusTypeDef HAL_SMBUS_UnRegisterAddrCallback(SMBUS_HandleTypeDef *hsmbus)
		847	{
		848	HAL_StatusTypeDef status = HAL_OK;
		849
		850	/* Process locked */
		851	__HAL_LOCK(hsmbus);
		852
		853	if (HAL_SMBUS_STATE_READY == hsmbus->State)
		854	{
		855	hsmbus->AddrCallback = HAL_SMBUS_AddrCallback; /* Legacy weak AddrCallback */
		856	}
		857	else
		858	{
		859	/* Update the error code */
		860	hsmbus->ErrorCode \|= HAL_SMBUS_ERROR_INVALID_CALLBACK;
		861
		862	/* Return error status */
		863	status = HAL_ERROR;
		864	}
		865
		866	/* Release Lock */
		867	__HAL_UNLOCK(hsmbus);
		868	return status;
		869	}
		870
		871	#endif /* USE_HAL_SMBUS_REGISTER_CALLBACKS */
		872
		873	/**
		874	* @}
		875	*/
		876
		877	/** @defgroup SMBUS_Exported_Functions_Group2 Input and Output operation functions
6	mjames	878	* @brief Data transfers functions
		879	*
2	mjames	880	@verbatim
		881	===============================================================================
		882	##### IO operation functions #####
		883	===============================================================================
		884	[..]
		885	This subsection provides a set of functions allowing to manage the SMBUS data
		886	transfers.
		887
		888	(#) Blocking mode function to check if device is ready for usage is :
		889	(++) HAL_SMBUS_IsDeviceReady()
		890
		891	(#) There is only one mode of transfer:
		892	(++) Non-Blocking mode : The communication is performed using Interrupts.
		893	These functions return the status of the transfer startup.
		894	The end of the data processing will be indicated through the
		895	dedicated SMBUS IRQ when using Interrupt mode.
		896
		897	(#) Non-Blocking mode functions with Interrupt are :
		898	(++) HAL_SMBUS_Master_Transmit_IT()
		899	(++) HAL_SMBUS_Master_Receive_IT()
		900	(++) HAL_SMBUS_Slave_Transmit_IT()
		901	(++) HAL_SMBUS_Slave_Receive_IT()
		902	(++) HAL_SMBUS_EnableListen_IT() or alias HAL_SMBUS_EnableListen_IT()
		903	(++) HAL_SMBUS_DisableListen_IT()
		904	(++) HAL_SMBUS_EnableAlert_IT()
		905	(++) HAL_SMBUS_DisableAlert_IT()
		906
		907	(#) A set of Transfer Complete Callbacks are provided in non-Blocking mode:
		908	(++) HAL_SMBUS_MasterTxCpltCallback()
		909	(++) HAL_SMBUS_MasterRxCpltCallback()
		910	(++) HAL_SMBUS_SlaveTxCpltCallback()
		911	(++) HAL_SMBUS_SlaveRxCpltCallback()
		912	(++) HAL_SMBUS_AddrCallback()
		913	(++) HAL_SMBUS_ListenCpltCallback()
		914	(++) HAL_SMBUS_ErrorCallback()
		915
		916	@endverbatim
		917	* @{
		918	*/
		919
		920	/**
		921	* @brief Transmit in master/host SMBUS mode an amount of data in non-blocking mode with Interrupt.
		922	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		923	* the configuration information for the specified SMBUS.
		924	* @param DevAddress Target device address: The device 7 bits address value
		925	* in datasheet must be shifted to the left before calling the interface
		926	* @param pData Pointer to data buffer
		927	* @param Size Amount of data to be sent
		928	* @param XferOptions Options of Transfer, value of @ref SMBUS_XferOptions_definition
		929	* @retval HAL status
		930	*/
6	mjames	931	HAL_StatusTypeDef HAL_SMBUS_Master_Transmit_IT(SMBUS_HandleTypeDef *hsmbus, uint16_t DevAddress,
		932	uint8_t *pData, uint16_t Size, uint32_t XferOptions)
2	mjames	933	{
		934	uint32_t tmp;
		935
		936	/* Check the parameters */
		937	assert_param(IS_SMBUS_TRANSFER_OPTIONS_REQUEST(XferOptions));
		938
		939	if (hsmbus->State == HAL_SMBUS_STATE_READY)
		940	{
		941	/* Process Locked */
		942	__HAL_LOCK(hsmbus);
		943
		944	hsmbus->State = HAL_SMBUS_STATE_MASTER_BUSY_TX;
		945	hsmbus->ErrorCode = HAL_SMBUS_ERROR_NONE;
		946	/* Prepare transfer parameters */
		947	hsmbus->pBuffPtr = pData;
		948	hsmbus->XferCount = Size;
		949	hsmbus->XferOptions = XferOptions;
		950
		951	/* In case of Quick command, remove autoend mode */
		952	/* Manage the stop generation by software */
		953	if (hsmbus->pBuffPtr == NULL)
		954	{
		955	hsmbus->XferOptions &= ~SMBUS_AUTOEND_MODE;
		956	}
		957
		958	if (Size > MAX_NBYTE_SIZE)
		959	{
		960	hsmbus->XferSize = MAX_NBYTE_SIZE;
		961	}
		962	else
		963	{
		964	hsmbus->XferSize = Size;
		965	}
		966
		967	/* Send Slave Address */
		968	/* Set NBYTES to write and reload if size > MAX_NBYTE_SIZE and generate RESTART */
		969	if ((hsmbus->XferSize < hsmbus->XferCount) && (hsmbus->XferSize == MAX_NBYTE_SIZE))
		970	{
6	mjames	971	SMBUS_TransferConfig(hsmbus, DevAddress, (uint8_t)hsmbus->XferSize,
		972	SMBUS_RELOAD_MODE \| (hsmbus->XferOptions & SMBUS_SENDPEC_MODE),
		973	SMBUS_GENERATE_START_WRITE);
2	mjames	974	}
		975	else
		976	{
		977	/* If transfer direction not change, do not generate Restart Condition */
		978	/* Mean Previous state is same as current state */
		979
		980	/* Store current volatile XferOptions, misra rule */
		981	tmp = hsmbus->XferOptions;
		982
6	mjames	983	if ((hsmbus->PreviousState == HAL_SMBUS_STATE_MASTER_BUSY_TX) && \
		984	(IS_SMBUS_TRANSFER_OTHER_OPTIONS_REQUEST(tmp) == 0))
2	mjames	985	{
6	mjames	986	SMBUS_TransferConfig(hsmbus, DevAddress, (uint8_t)hsmbus->XferSize, hsmbus->XferOptions,
		987	SMBUS_NO_STARTSTOP);
2	mjames	988	}
		989	/* Else transfer direction change, so generate Restart with new transfer direction */
		990	else
		991	{
		992	/* Convert OTHER_xxx XferOptions if any */
		993	SMBUS_ConvertOtherXferOptions(hsmbus);
		994
		995	/* Handle Transfer */
6	mjames	996	SMBUS_TransferConfig(hsmbus, DevAddress, (uint8_t)hsmbus->XferSize,
		997	hsmbus->XferOptions,
		998	SMBUS_GENERATE_START_WRITE);
2	mjames	999	}
		1000
		1001	/* If PEC mode is enable, size to transmit manage by SW part should be Size-1 byte, corresponding to PEC byte */
		1002	/* PEC byte is automatically sent by HW block, no need to manage it in Transmit process */
		1003	if (SMBUS_GET_PEC_MODE(hsmbus) != 0UL)
		1004	{
		1005	hsmbus->XferSize--;
		1006	hsmbus->XferCount--;
		1007	}
		1008	}
		1009
		1010	/* Process Unlocked */
		1011	__HAL_UNLOCK(hsmbus);
		1012
		1013	/* Note : The SMBUS interrupts must be enabled after unlocking current process
		1014	to avoid the risk of SMBUS interrupt handle execution before current
		1015	process unlock */
		1016	SMBUS_Enable_IRQ(hsmbus, SMBUS_IT_TX);
		1017
		1018	return HAL_OK;
		1019	}
		1020	else
		1021	{
		1022	return HAL_BUSY;
		1023	}
		1024	}
		1025
		1026	/**
		1027	* @brief Receive in master/host SMBUS mode an amount of data in non-blocking mode with Interrupt.
		1028	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		1029	* the configuration information for the specified SMBUS.
		1030	* @param DevAddress Target device address: The device 7 bits address value
		1031	* in datasheet must be shifted to the left before calling the interface
		1032	* @param pData Pointer to data buffer
		1033	* @param Size Amount of data to be sent
		1034	* @param XferOptions Options of Transfer, value of @ref SMBUS_XferOptions_definition
		1035	* @retval HAL status
		1036	*/
6	mjames	1037	HAL_StatusTypeDef HAL_SMBUS_Master_Receive_IT(SMBUS_HandleTypeDef hsmbus, uint16_t DevAddress, uint8_t pData,
		1038	uint16_t Size, uint32_t XferOptions)
2	mjames	1039	{
		1040	uint32_t tmp;
		1041
		1042	/* Check the parameters */
		1043	assert_param(IS_SMBUS_TRANSFER_OPTIONS_REQUEST(XferOptions));
		1044
		1045	if (hsmbus->State == HAL_SMBUS_STATE_READY)
		1046	{
		1047	/* Process Locked */
		1048	__HAL_LOCK(hsmbus);
		1049
		1050	hsmbus->State = HAL_SMBUS_STATE_MASTER_BUSY_RX;
		1051	hsmbus->ErrorCode = HAL_SMBUS_ERROR_NONE;
		1052
		1053	/* Prepare transfer parameters */
		1054	hsmbus->pBuffPtr = pData;
		1055	hsmbus->XferCount = Size;
		1056	hsmbus->XferOptions = XferOptions;
		1057
		1058	/* In case of Quick command, remove autoend mode */
		1059	/* Manage the stop generation by software */
		1060	if (hsmbus->pBuffPtr == NULL)
		1061	{
		1062	hsmbus->XferOptions &= ~SMBUS_AUTOEND_MODE;
		1063	}
		1064
		1065	if (Size > MAX_NBYTE_SIZE)
		1066	{
		1067	hsmbus->XferSize = MAX_NBYTE_SIZE;
		1068	}
		1069	else
		1070	{
		1071	hsmbus->XferSize = Size;
		1072	}
		1073
		1074	/* Send Slave Address */
		1075	/* Set NBYTES to write and reload if size > MAX_NBYTE_SIZE and generate RESTART */
		1076	if ((hsmbus->XferSize < hsmbus->XferCount) && (hsmbus->XferSize == MAX_NBYTE_SIZE))
		1077	{
6	mjames	1078	SMBUS_TransferConfig(hsmbus, DevAddress, (uint8_t)hsmbus->XferSize,
		1079	SMBUS_RELOAD_MODE \| (hsmbus->XferOptions & SMBUS_SENDPEC_MODE),
		1080	SMBUS_GENERATE_START_READ);
2	mjames	1081	}
		1082	else
		1083	{
		1084	/* If transfer direction not change, do not generate Restart Condition */
		1085	/* Mean Previous state is same as current state */
		1086
		1087	/* Store current volatile XferOptions, Misra rule */
		1088	tmp = hsmbus->XferOptions;
		1089
6	mjames	1090	if ((hsmbus->PreviousState == HAL_SMBUS_STATE_MASTER_BUSY_RX) && \
		1091	(IS_SMBUS_TRANSFER_OTHER_OPTIONS_REQUEST(tmp) == 0))
2	mjames	1092	{
6	mjames	1093	SMBUS_TransferConfig(hsmbus, DevAddress, (uint8_t)hsmbus->XferSize, hsmbus->XferOptions,
		1094	SMBUS_NO_STARTSTOP);
2	mjames	1095	}
		1096	/* Else transfer direction change, so generate Restart with new transfer direction */
		1097	else
		1098	{
		1099	/* Convert OTHER_xxx XferOptions if any */
		1100	SMBUS_ConvertOtherXferOptions(hsmbus);
		1101
		1102	/* Handle Transfer */
6	mjames	1103	SMBUS_TransferConfig(hsmbus, DevAddress, (uint8_t)hsmbus->XferSize,
		1104	hsmbus->XferOptions,
		1105	SMBUS_GENERATE_START_READ);
2	mjames	1106	}
		1107	}
		1108
		1109	/* Process Unlocked */
		1110	__HAL_UNLOCK(hsmbus);
		1111
		1112	/* Note : The SMBUS interrupts must be enabled after unlocking current process
		1113	to avoid the risk of SMBUS interrupt handle execution before current
		1114	process unlock */
		1115	SMBUS_Enable_IRQ(hsmbus, SMBUS_IT_RX);
		1116
		1117	return HAL_OK;
		1118	}
		1119	else
		1120	{
		1121	return HAL_BUSY;
		1122	}
		1123	}
		1124
		1125	/**
		1126	* @brief Abort a master/host SMBUS process communication with Interrupt.
		1127	* @note This abort can be called only if state is ready
		1128	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		1129	* the configuration information for the specified SMBUS.
		1130	* @param DevAddress Target device address: The device 7 bits address value
		1131	* in datasheet must be shifted to the left before calling the interface
		1132	* @retval HAL status
		1133	*/
		1134	HAL_StatusTypeDef HAL_SMBUS_Master_Abort_IT(SMBUS_HandleTypeDef *hsmbus, uint16_t DevAddress)
		1135	{
		1136	if (hsmbus->State == HAL_SMBUS_STATE_READY)
		1137	{
		1138	/* Process Locked */
		1139	__HAL_LOCK(hsmbus);
		1140
		1141	/* Keep the same state as previous */
		1142	/* to perform as well the call of the corresponding end of transfer callback */
		1143	if (hsmbus->PreviousState == HAL_SMBUS_STATE_MASTER_BUSY_TX)
		1144	{
		1145	hsmbus->State = HAL_SMBUS_STATE_MASTER_BUSY_TX;
		1146	}
		1147	else if (hsmbus->PreviousState == HAL_SMBUS_STATE_MASTER_BUSY_RX)
		1148	{
		1149	hsmbus->State = HAL_SMBUS_STATE_MASTER_BUSY_RX;
		1150	}
		1151	else
		1152	{
		1153	/* Wrong usage of abort function */
		1154	/* This function should be used only in case of abort monitored by master device */
		1155	return HAL_ERROR;
		1156	}
		1157	hsmbus->ErrorCode = HAL_SMBUS_ERROR_NONE;
		1158
		1159	/* Set NBYTES to 1 to generate a dummy read on SMBUS peripheral */
		1160	/* Set AUTOEND mode, this will generate a NACK then STOP condition to abort the current transfer */
		1161	SMBUS_TransferConfig(hsmbus, DevAddress, 1, SMBUS_AUTOEND_MODE, SMBUS_NO_STARTSTOP);
		1162
		1163	/* Process Unlocked */
		1164	__HAL_UNLOCK(hsmbus);
		1165
		1166	/* Note : The SMBUS interrupts must be enabled after unlocking current process
		1167	to avoid the risk of SMBUS interrupt handle execution before current
		1168	process unlock */
		1169	if (hsmbus->State == HAL_SMBUS_STATE_MASTER_BUSY_TX)
		1170	{
		1171	SMBUS_Enable_IRQ(hsmbus, SMBUS_IT_TX);
		1172	}
		1173	else if (hsmbus->State == HAL_SMBUS_STATE_MASTER_BUSY_RX)
		1174	{
		1175	SMBUS_Enable_IRQ(hsmbus, SMBUS_IT_RX);
		1176	}
		1177	else
		1178	{
		1179	/* Nothing to do */
		1180	}
		1181
		1182	return HAL_OK;
		1183	}
		1184	else
		1185	{
		1186	return HAL_BUSY;
		1187	}
		1188	}
		1189
		1190	/**
		1191	* @brief Transmit in slave/device SMBUS mode an amount of data in non-blocking mode with Interrupt.
		1192	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		1193	* the configuration information for the specified SMBUS.
		1194	* @param pData Pointer to data buffer
		1195	* @param Size Amount of data to be sent
		1196	* @param XferOptions Options of Transfer, value of @ref SMBUS_XferOptions_definition
		1197	* @retval HAL status
		1198	*/
6	mjames	1199	HAL_StatusTypeDef HAL_SMBUS_Slave_Transmit_IT(SMBUS_HandleTypeDef hsmbus, uint8_t pData, uint16_t Size,
		1200	uint32_t XferOptions)
2	mjames	1201	{
		1202	/* Check the parameters */
		1203	assert_param(IS_SMBUS_TRANSFER_OPTIONS_REQUEST(XferOptions));
		1204
		1205	if ((hsmbus->State & HAL_SMBUS_STATE_LISTEN) == HAL_SMBUS_STATE_LISTEN)
		1206	{
		1207	if ((pData == NULL) \|\| (Size == 0UL))
		1208	{
		1209	hsmbus->ErrorCode = HAL_SMBUS_ERROR_INVALID_PARAM;
		1210	return HAL_ERROR;
		1211	}
		1212
		1213	/* Disable Interrupts, to prevent preemption during treatment in case of multicall */
		1214	SMBUS_Disable_IRQ(hsmbus, SMBUS_IT_ADDR \| SMBUS_IT_TX);
		1215
		1216	/* Process Locked */
		1217	__HAL_LOCK(hsmbus);
		1218
		1219	hsmbus->State = (HAL_SMBUS_STATE_SLAVE_BUSY_TX \| HAL_SMBUS_STATE_LISTEN);
		1220	hsmbus->ErrorCode = HAL_SMBUS_ERROR_NONE;
		1221
		1222	/* Set SBC bit to manage Acknowledge at each bit */
		1223	hsmbus->Instance->CR1 \|= I2C_CR1_SBC;
		1224
		1225	/* Enable Address Acknowledge */
		1226	hsmbus->Instance->CR2 &= ~I2C_CR2_NACK;
		1227
		1228	/* Prepare transfer parameters */
		1229	hsmbus->pBuffPtr = pData;
		1230	hsmbus->XferCount = Size;
		1231	hsmbus->XferOptions = XferOptions;
		1232
		1233	/* Convert OTHER_xxx XferOptions if any */
		1234	SMBUS_ConvertOtherXferOptions(hsmbus);
		1235
		1236	if (Size > MAX_NBYTE_SIZE)
		1237	{
		1238	hsmbus->XferSize = MAX_NBYTE_SIZE;
		1239	}
		1240	else
		1241	{
		1242	hsmbus->XferSize = Size;
		1243	}
		1244
		1245	/* Set NBYTES to write and reload if size > MAX_NBYTE_SIZE and generate RESTART */
		1246	if ((hsmbus->XferSize < hsmbus->XferCount) && (hsmbus->XferSize == MAX_NBYTE_SIZE))
		1247	{
6	mjames	1248	SMBUS_TransferConfig(hsmbus, 0, (uint8_t)hsmbus->XferSize,
		1249	SMBUS_RELOAD_MODE \| (hsmbus->XferOptions & SMBUS_SENDPEC_MODE),
		1250	SMBUS_NO_STARTSTOP);
2	mjames	1251	}
		1252	else
		1253	{
		1254	/* Set NBYTE to transmit */
6	mjames	1255	SMBUS_TransferConfig(hsmbus, 0, (uint8_t)hsmbus->XferSize, hsmbus->XferOptions,
		1256	SMBUS_NO_STARTSTOP);
2	mjames	1257
		1258	/* If PEC mode is enable, size to transmit should be Size-1 byte, corresponding to PEC byte */
		1259	/* PEC byte is automatically sent by HW block, no need to manage it in Transmit process */
		1260	if (SMBUS_GET_PEC_MODE(hsmbus) != 0UL)
		1261	{
		1262	hsmbus->XferSize--;
		1263	hsmbus->XferCount--;
		1264	}
		1265	}
		1266
		1267	/* Clear ADDR flag after prepare the transfer parameters */
		1268	/* This action will generate an acknowledge to the HOST */
		1269	__HAL_SMBUS_CLEAR_FLAG(hsmbus, SMBUS_FLAG_ADDR);
		1270
		1271	/* Process Unlocked */
		1272	__HAL_UNLOCK(hsmbus);
		1273
		1274	/* Note : The SMBUS interrupts must be enabled after unlocking current process
		1275	to avoid the risk of SMBUS interrupt handle execution before current
		1276	process unlock */
		1277	/* REnable ADDR interrupt */
		1278	SMBUS_Enable_IRQ(hsmbus, SMBUS_IT_TX \| SMBUS_IT_ADDR);
		1279
		1280	return HAL_OK;
		1281	}
		1282	else
		1283	{
		1284	return HAL_BUSY;
		1285	}
		1286	}
		1287
		1288	/**
		1289	* @brief Receive in slave/device SMBUS mode an amount of data in non-blocking mode with Interrupt.
		1290	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		1291	* the configuration information for the specified SMBUS.
		1292	* @param pData Pointer to data buffer
		1293	* @param Size Amount of data to be sent
		1294	* @param XferOptions Options of Transfer, value of @ref SMBUS_XferOptions_definition
		1295	* @retval HAL status
		1296	*/
6	mjames	1297	HAL_StatusTypeDef HAL_SMBUS_Slave_Receive_IT(SMBUS_HandleTypeDef hsmbus, uint8_t pData, uint16_t Size,
		1298	uint32_t XferOptions)
2	mjames	1299	{
		1300	/* Check the parameters */
		1301	assert_param(IS_SMBUS_TRANSFER_OPTIONS_REQUEST(XferOptions));
		1302
		1303	if ((hsmbus->State & HAL_SMBUS_STATE_LISTEN) == HAL_SMBUS_STATE_LISTEN)
		1304	{
		1305	if ((pData == NULL) \|\| (Size == 0UL))
		1306	{
		1307	hsmbus->ErrorCode = HAL_SMBUS_ERROR_INVALID_PARAM;
		1308	return HAL_ERROR;
		1309	}
		1310
		1311	/* Disable Interrupts, to prevent preemption during treatment in case of multicall */
		1312	SMBUS_Disable_IRQ(hsmbus, SMBUS_IT_ADDR \| SMBUS_IT_RX);
		1313
		1314	/* Process Locked */
		1315	__HAL_LOCK(hsmbus);
		1316
		1317	hsmbus->State = (HAL_SMBUS_STATE_SLAVE_BUSY_RX \| HAL_SMBUS_STATE_LISTEN);
		1318	hsmbus->ErrorCode = HAL_SMBUS_ERROR_NONE;
		1319
		1320	/* Set SBC bit to manage Acknowledge at each bit */
		1321	hsmbus->Instance->CR1 \|= I2C_CR1_SBC;
		1322
		1323	/* Enable Address Acknowledge */
		1324	hsmbus->Instance->CR2 &= ~I2C_CR2_NACK;
		1325
		1326	/* Prepare transfer parameters */
		1327	hsmbus->pBuffPtr = pData;
		1328	hsmbus->XferSize = Size;
		1329	hsmbus->XferCount = Size;
		1330	hsmbus->XferOptions = XferOptions;
		1331
		1332	/* Convert OTHER_xxx XferOptions if any */
		1333	SMBUS_ConvertOtherXferOptions(hsmbus);
		1334
		1335	/* Set NBYTE to receive */
		1336	/* If XferSize equal "1", or XferSize equal "2" with PEC requested (mean 1 data byte + 1 PEC byte */
		1337	/* no need to set RELOAD bit mode, a ACK will be automatically generated in that case */
		1338	/* else need to set RELOAD bit mode to generate an automatic ACK at each byte Received */
		1339	/* This RELOAD bit will be reset for last BYTE to be receive in SMBUS_Slave_ISR */
		1340	if (((SMBUS_GET_PEC_MODE(hsmbus) != 0UL) && (hsmbus->XferSize == 2U)) \|\| (hsmbus->XferSize == 1U))
		1341	{
6	mjames	1342	SMBUS_TransferConfig(hsmbus, 0, (uint8_t)hsmbus->XferSize, hsmbus->XferOptions,
		1343	SMBUS_NO_STARTSTOP);
2	mjames	1344	}
		1345	else
		1346	{
		1347	SMBUS_TransferConfig(hsmbus, 0, 1, hsmbus->XferOptions \| SMBUS_RELOAD_MODE, SMBUS_NO_STARTSTOP);
		1348	}
		1349
		1350	/* Clear ADDR flag after prepare the transfer parameters */
		1351	/* This action will generate an acknowledge to the HOST */
		1352	__HAL_SMBUS_CLEAR_FLAG(hsmbus, SMBUS_FLAG_ADDR);
		1353
		1354	/* Process Unlocked */
		1355	__HAL_UNLOCK(hsmbus);
		1356
		1357	/* Note : The SMBUS interrupts must be enabled after unlocking current process
		1358	to avoid the risk of SMBUS interrupt handle execution before current
		1359	process unlock */
		1360	/* REnable ADDR interrupt */
		1361	SMBUS_Enable_IRQ(hsmbus, SMBUS_IT_RX \| SMBUS_IT_ADDR);
		1362
		1363	return HAL_OK;
		1364	}
		1365	else
		1366	{
		1367	return HAL_BUSY;
		1368	}
		1369	}
		1370
		1371	/**
		1372	* @brief Enable the Address listen mode with Interrupt.
		1373	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		1374	* the configuration information for the specified SMBUS.
		1375	* @retval HAL status
		1376	*/
		1377	HAL_StatusTypeDef HAL_SMBUS_EnableListen_IT(SMBUS_HandleTypeDef *hsmbus)
		1378	{
		1379	hsmbus->State = HAL_SMBUS_STATE_LISTEN;
		1380
		1381	/* Enable the Address Match interrupt */
		1382	SMBUS_Enable_IRQ(hsmbus, SMBUS_IT_ADDR);
		1383
		1384	return HAL_OK;
		1385	}
		1386
		1387	/**
		1388	* @brief Disable the Address listen mode with Interrupt.
		1389	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		1390	* the configuration information for the specified SMBUS.
		1391	* @retval HAL status
		1392	*/
		1393	HAL_StatusTypeDef HAL_SMBUS_DisableListen_IT(SMBUS_HandleTypeDef *hsmbus)
		1394	{
		1395	/* Disable Address listen mode only if a transfer is not ongoing */
		1396	if (hsmbus->State == HAL_SMBUS_STATE_LISTEN)
		1397	{
		1398	hsmbus->State = HAL_SMBUS_STATE_READY;
		1399
		1400	/* Disable the Address Match interrupt */
		1401	SMBUS_Disable_IRQ(hsmbus, SMBUS_IT_ADDR);
		1402
		1403	return HAL_OK;
		1404	}
		1405	else
		1406	{
		1407	return HAL_BUSY;
		1408	}
		1409	}
		1410
		1411	/**
		1412	* @brief Enable the SMBUS alert mode with Interrupt.
		1413	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		1414	* the configuration information for the specified SMBUSx peripheral.
		1415	* @retval HAL status
		1416	*/
		1417	HAL_StatusTypeDef HAL_SMBUS_EnableAlert_IT(SMBUS_HandleTypeDef *hsmbus)
		1418	{
		1419	/* Enable SMBus alert */
		1420	hsmbus->Instance->CR1 \|= I2C_CR1_ALERTEN;
		1421
		1422	/* Clear ALERT flag */
		1423	__HAL_SMBUS_CLEAR_FLAG(hsmbus, SMBUS_FLAG_ALERT);
		1424
		1425	/* Enable Alert Interrupt */
		1426	SMBUS_Enable_IRQ(hsmbus, SMBUS_IT_ALERT);
		1427
		1428	return HAL_OK;
		1429	}
		1430	/**
		1431	* @brief Disable the SMBUS alert mode with Interrupt.
		1432	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		1433	* the configuration information for the specified SMBUSx peripheral.
		1434	* @retval HAL status
		1435	*/
		1436	HAL_StatusTypeDef HAL_SMBUS_DisableAlert_IT(SMBUS_HandleTypeDef *hsmbus)
		1437	{
		1438	/* Enable SMBus alert */
		1439	hsmbus->Instance->CR1 &= ~I2C_CR1_ALERTEN;
		1440
		1441	/* Disable Alert Interrupt */
		1442	SMBUS_Disable_IRQ(hsmbus, SMBUS_IT_ALERT);
		1443
		1444	return HAL_OK;
		1445	}
		1446
		1447	/**
		1448	* @brief Check if target device is ready for communication.
		1449	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		1450	* the configuration information for the specified SMBUS.
		1451	* @param DevAddress Target device address: The device 7 bits address value
		1452	* in datasheet must be shifted to the left before calling the interface
		1453	* @param Trials Number of trials
		1454	* @param Timeout Timeout duration
		1455	* @retval HAL status
		1456	*/
6	mjames	1457	HAL_StatusTypeDef HAL_SMBUS_IsDeviceReady(SMBUS_HandleTypeDef *hsmbus, uint16_t DevAddress, uint32_t Trials,
		1458	uint32_t Timeout)
2	mjames	1459	{
		1460	uint32_t tickstart;
		1461
		1462	__IO uint32_t SMBUS_Trials = 0UL;
		1463
		1464	FlagStatus tmp1;
		1465	FlagStatus tmp2;
		1466
		1467	if (hsmbus->State == HAL_SMBUS_STATE_READY)
		1468	{
		1469	if (__HAL_SMBUS_GET_FLAG(hsmbus, SMBUS_FLAG_BUSY) != RESET)
		1470	{
		1471	return HAL_BUSY;
		1472	}
		1473
		1474	/* Process Locked */
		1475	__HAL_LOCK(hsmbus);
		1476
		1477	hsmbus->State = HAL_SMBUS_STATE_BUSY;
		1478	hsmbus->ErrorCode = HAL_SMBUS_ERROR_NONE;
		1479
		1480	do
		1481	{
		1482	/* Generate Start */
		1483	hsmbus->Instance->CR2 = SMBUS_GENERATE_START(hsmbus->Init.AddressingMode, DevAddress);
		1484
		1485	/* No need to Check TC flag, with AUTOEND mode the stop is automatically generated */
		1486	/* Wait until STOPF flag is set or a NACK flag is set*/
		1487	tickstart = HAL_GetTick();
		1488
		1489	tmp1 = __HAL_SMBUS_GET_FLAG(hsmbus, SMBUS_FLAG_STOPF);
		1490	tmp2 = __HAL_SMBUS_GET_FLAG(hsmbus, SMBUS_FLAG_AF);
		1491
		1492	while ((tmp1 == RESET) && (tmp2 == RESET))
		1493	{
		1494	if (Timeout != HAL_MAX_DELAY)
		1495	{
		1496	if (((HAL_GetTick() - tickstart) > Timeout) \|\| (Timeout == 0UL))
		1497	{
		1498	/* Device is ready */
		1499	hsmbus->State = HAL_SMBUS_STATE_READY;
		1500
		1501	/* Update SMBUS error code */
		1502	hsmbus->ErrorCode \|= HAL_SMBUS_ERROR_HALTIMEOUT;
		1503
		1504	/* Process Unlocked */
		1505	__HAL_UNLOCK(hsmbus);
		1506	return HAL_ERROR;
		1507	}
		1508	}
		1509
		1510	tmp1 = __HAL_SMBUS_GET_FLAG(hsmbus, SMBUS_FLAG_STOPF);
		1511	tmp2 = __HAL_SMBUS_GET_FLAG(hsmbus, SMBUS_FLAG_AF);
		1512	}
		1513
		1514	/* Check if the NACKF flag has not been set */
		1515	if (__HAL_SMBUS_GET_FLAG(hsmbus, SMBUS_FLAG_AF) == RESET)
		1516	{
		1517	/* Wait until STOPF flag is reset */
		1518	if (SMBUS_WaitOnFlagUntilTimeout(hsmbus, SMBUS_FLAG_STOPF, RESET, Timeout) != HAL_OK)
		1519	{
		1520	return HAL_ERROR;
		1521	}
		1522
		1523	/* Clear STOP Flag */
		1524	__HAL_SMBUS_CLEAR_FLAG(hsmbus, SMBUS_FLAG_STOPF);
		1525
		1526	/* Device is ready */
		1527	hsmbus->State = HAL_SMBUS_STATE_READY;
		1528
		1529	/* Process Unlocked */
		1530	__HAL_UNLOCK(hsmbus);
		1531
		1532	return HAL_OK;
		1533	}
		1534	else
		1535	{
		1536	/* Wait until STOPF flag is reset */
		1537	if (SMBUS_WaitOnFlagUntilTimeout(hsmbus, SMBUS_FLAG_STOPF, RESET, Timeout) != HAL_OK)
		1538	{
		1539	return HAL_ERROR;
		1540	}
		1541
		1542	/* Clear NACK Flag */
		1543	__HAL_SMBUS_CLEAR_FLAG(hsmbus, SMBUS_FLAG_AF);
		1544
		1545	/* Clear STOP Flag, auto generated with autoend*/
		1546	__HAL_SMBUS_CLEAR_FLAG(hsmbus, SMBUS_FLAG_STOPF);
		1547	}
		1548
		1549	/* Check if the maximum allowed number of trials has been reached */
		1550	if (SMBUS_Trials == Trials)
		1551	{
		1552	/* Generate Stop */
		1553	hsmbus->Instance->CR2 \|= I2C_CR2_STOP;
		1554
		1555	/* Wait until STOPF flag is reset */
		1556	if (SMBUS_WaitOnFlagUntilTimeout(hsmbus, SMBUS_FLAG_STOPF, RESET, Timeout) != HAL_OK)
		1557	{
		1558	return HAL_ERROR;
		1559	}
		1560
		1561	/* Clear STOP Flag */
		1562	__HAL_SMBUS_CLEAR_FLAG(hsmbus, SMBUS_FLAG_STOPF);
		1563	}
		1564
		1565	/* Increment Trials */
		1566	SMBUS_Trials++;
6	mjames	1567	} while (SMBUS_Trials < Trials);
2	mjames	1568
		1569	hsmbus->State = HAL_SMBUS_STATE_READY;
		1570
		1571	/* Update SMBUS error code */
		1572	hsmbus->ErrorCode \|= HAL_SMBUS_ERROR_HALTIMEOUT;
		1573
		1574	/* Process Unlocked */
		1575	__HAL_UNLOCK(hsmbus);
		1576
		1577	return HAL_ERROR;
		1578	}
		1579	else
		1580	{
		1581	return HAL_BUSY;
		1582	}
		1583	}
		1584	/**
		1585	* @}
		1586	*/
		1587
		1588	/** @defgroup SMBUS_IRQ_Handler_and_Callbacks IRQ Handler and Callbacks
6	mjames	1589	* @{
		1590	*/
2	mjames	1591
		1592	/**
		1593	* @brief Handle SMBUS event interrupt request.
		1594	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		1595	* the configuration information for the specified SMBUS.
		1596	* @retval None
		1597	*/
		1598	void HAL_SMBUS_EV_IRQHandler(SMBUS_HandleTypeDef *hsmbus)
		1599	{
		1600	/* Use a local variable to store the current ISR flags */
		1601	/* This action will avoid a wrong treatment due to ISR flags change during interrupt handler */
		1602	uint32_t tmpisrvalue = READ_REG(hsmbus->Instance->ISR);
		1603	uint32_t tmpcr1value = READ_REG(hsmbus->Instance->CR1);
		1604
		1605	/* SMBUS in mode Transmitter ---------------------------------------------------*/
6	mjames	1606	if ((SMBUS_CHECK_IT_SOURCE(tmpcr1value, (SMBUS_IT_TCI \| SMBUS_IT_STOPI \|
		1607	SMBUS_IT_NACKI \| SMBUS_IT_TXI)) != RESET) &&
		1608	((SMBUS_CHECK_FLAG(tmpisrvalue, SMBUS_FLAG_TXIS) != RESET) \|\|
		1609	(SMBUS_CHECK_FLAG(tmpisrvalue, SMBUS_FLAG_TCR) != RESET) \|\|
		1610	(SMBUS_CHECK_FLAG(tmpisrvalue, SMBUS_FLAG_TC) != RESET) \|\|
		1611	(SMBUS_CHECK_FLAG(tmpisrvalue, SMBUS_FLAG_STOPF) != RESET) \|\|
		1612	(SMBUS_CHECK_FLAG(tmpisrvalue, SMBUS_FLAG_AF) != RESET)))
2	mjames	1613	{
		1614	/* Slave mode selected */
		1615	if ((hsmbus->State & HAL_SMBUS_STATE_SLAVE_BUSY_TX) == HAL_SMBUS_STATE_SLAVE_BUSY_TX)
		1616	{
		1617	(void)SMBUS_Slave_ISR(hsmbus, tmpisrvalue);
		1618	}
		1619	/* Master mode selected */
		1620	else if ((hsmbus->State & HAL_SMBUS_STATE_MASTER_BUSY_TX) == HAL_SMBUS_STATE_MASTER_BUSY_TX)
		1621	{
		1622	(void)SMBUS_Master_ISR(hsmbus, tmpisrvalue);
		1623	}
		1624	else
		1625	{
		1626	/* Nothing to do */
		1627	}
		1628	}
		1629
		1630	/* SMBUS in mode Receiver ----------------------------------------------------*/
6	mjames	1631	if ((SMBUS_CHECK_IT_SOURCE(tmpcr1value, (SMBUS_IT_TCI \| SMBUS_IT_STOPI \|
		1632	SMBUS_IT_NACKI \| SMBUS_IT_RXI)) != RESET) &&
		1633	((SMBUS_CHECK_FLAG(tmpisrvalue, SMBUS_FLAG_RXNE) != RESET) \|\|
		1634	(SMBUS_CHECK_FLAG(tmpisrvalue, SMBUS_FLAG_TCR) != RESET) \|\|
		1635	(SMBUS_CHECK_FLAG(tmpisrvalue, SMBUS_FLAG_TC) != RESET) \|\|
		1636	(SMBUS_CHECK_FLAG(tmpisrvalue, SMBUS_FLAG_STOPF) != RESET) \|\|
		1637	(SMBUS_CHECK_FLAG(tmpisrvalue, SMBUS_FLAG_AF) != RESET)))
2	mjames	1638	{
		1639	/* Slave mode selected */
		1640	if ((hsmbus->State & HAL_SMBUS_STATE_SLAVE_BUSY_RX) == HAL_SMBUS_STATE_SLAVE_BUSY_RX)
		1641	{
		1642	(void)SMBUS_Slave_ISR(hsmbus, tmpisrvalue);
		1643	}
		1644	/* Master mode selected */
		1645	else if ((hsmbus->State & HAL_SMBUS_STATE_MASTER_BUSY_RX) == HAL_SMBUS_STATE_MASTER_BUSY_RX)
		1646	{
		1647	(void)SMBUS_Master_ISR(hsmbus, tmpisrvalue);
		1648	}
		1649	else
		1650	{
		1651	/* Nothing to do */
		1652	}
		1653	}
		1654
		1655	/* SMBUS in mode Listener Only --------------------------------------------------*/
6	mjames	1656	if (((SMBUS_CHECK_IT_SOURCE(tmpcr1value, SMBUS_IT_ADDRI) != RESET) \|\|
		1657	(SMBUS_CHECK_IT_SOURCE(tmpcr1value, SMBUS_IT_STOPI) != RESET) \|\|
		1658	(SMBUS_CHECK_IT_SOURCE(tmpcr1value, SMBUS_IT_NACKI) != RESET)) &&
		1659	((SMBUS_CHECK_FLAG(tmpisrvalue, SMBUS_FLAG_ADDR) != RESET) \|\|
		1660	(SMBUS_CHECK_FLAG(tmpisrvalue, SMBUS_FLAG_STOPF) != RESET) \|\|
		1661	(SMBUS_CHECK_FLAG(tmpisrvalue, SMBUS_FLAG_AF) != RESET)))
2	mjames	1662	{
		1663	if ((hsmbus->State & HAL_SMBUS_STATE_LISTEN) == HAL_SMBUS_STATE_LISTEN)
		1664	{
		1665	(void)SMBUS_Slave_ISR(hsmbus, tmpisrvalue);
		1666	}
		1667	}
		1668	}
		1669
		1670	/**
		1671	* @brief Handle SMBUS error interrupt request.
		1672	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		1673	* the configuration information for the specified SMBUS.
		1674	* @retval None
		1675	*/
		1676	void HAL_SMBUS_ER_IRQHandler(SMBUS_HandleTypeDef *hsmbus)
		1677	{
		1678	SMBUS_ITErrorHandler(hsmbus);
		1679	}
		1680
		1681	/**
		1682	* @brief Master Tx Transfer completed callback.
		1683	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		1684	* the configuration information for the specified SMBUS.
		1685	* @retval None
		1686	*/
		1687	__weak void HAL_SMBUS_MasterTxCpltCallback(SMBUS_HandleTypeDef *hsmbus)
		1688	{
		1689	/* Prevent unused argument(s) compilation warning */
		1690	UNUSED(hsmbus);
		1691
		1692	/* NOTE : This function should not be modified, when the callback is needed,
		1693	the HAL_SMBUS_MasterTxCpltCallback() could be implemented in the user file
		1694	*/
		1695	}
		1696
		1697	/**
		1698	* @brief Master Rx Transfer completed callback.
		1699	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		1700	* the configuration information for the specified SMBUS.
		1701	* @retval None
		1702	*/
		1703	__weak void HAL_SMBUS_MasterRxCpltCallback(SMBUS_HandleTypeDef *hsmbus)
		1704	{
		1705	/* Prevent unused argument(s) compilation warning */
		1706	UNUSED(hsmbus);
		1707
		1708	/* NOTE : This function should not be modified, when the callback is needed,
		1709	the HAL_SMBUS_MasterRxCpltCallback() could be implemented in the user file
		1710	*/
		1711	}
		1712
		1713	/** @brief Slave Tx Transfer completed callback.
		1714	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		1715	* the configuration information for the specified SMBUS.
		1716	* @retval None
		1717	*/
		1718	__weak void HAL_SMBUS_SlaveTxCpltCallback(SMBUS_HandleTypeDef *hsmbus)
		1719	{
		1720	/* Prevent unused argument(s) compilation warning */
		1721	UNUSED(hsmbus);
		1722
		1723	/* NOTE : This function should not be modified, when the callback is needed,
		1724	the HAL_SMBUS_SlaveTxCpltCallback() could be implemented in the user file
		1725	*/
		1726	}
		1727
		1728	/**
		1729	* @brief Slave Rx Transfer completed callback.
		1730	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		1731	* the configuration information for the specified SMBUS.
		1732	* @retval None
		1733	*/
		1734	__weak void HAL_SMBUS_SlaveRxCpltCallback(SMBUS_HandleTypeDef *hsmbus)
		1735	{
		1736	/* Prevent unused argument(s) compilation warning */
		1737	UNUSED(hsmbus);
		1738
		1739	/* NOTE : This function should not be modified, when the callback is needed,
		1740	the HAL_SMBUS_SlaveRxCpltCallback() could be implemented in the user file
		1741	*/
		1742	}
		1743
		1744	/**
		1745	* @brief Slave Address Match callback.
		1746	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		1747	* the configuration information for the specified SMBUS.
		1748	* @param TransferDirection Master request Transfer Direction (Write/Read)
		1749	* @param AddrMatchCode Address Match Code
		1750	* @retval None
		1751	*/
6	mjames	1752	__weak void HAL_SMBUS_AddrCallback(SMBUS_HandleTypeDef *hsmbus, uint8_t TransferDirection,
		1753	uint16_t AddrMatchCode)
2	mjames	1754	{
		1755	/* Prevent unused argument(s) compilation warning */
		1756	UNUSED(hsmbus);
		1757	UNUSED(TransferDirection);
		1758	UNUSED(AddrMatchCode);
		1759
		1760	/* NOTE : This function should not be modified, when the callback is needed,
		1761	the HAL_SMBUS_AddrCallback() could be implemented in the user file
		1762	*/
		1763	}
		1764
		1765	/**
		1766	* @brief Listen Complete callback.
		1767	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		1768	* the configuration information for the specified SMBUS.
		1769	* @retval None
		1770	*/
		1771	__weak void HAL_SMBUS_ListenCpltCallback(SMBUS_HandleTypeDef *hsmbus)
		1772	{
		1773	/* Prevent unused argument(s) compilation warning */
		1774	UNUSED(hsmbus);
		1775
		1776	/* NOTE : This function should not be modified, when the callback is needed,
		1777	the HAL_SMBUS_ListenCpltCallback() could be implemented in the user file
		1778	*/
		1779	}
		1780
		1781	/**
		1782	* @brief SMBUS error callback.
		1783	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		1784	* the configuration information for the specified SMBUS.
		1785	* @retval None
		1786	*/
		1787	__weak void HAL_SMBUS_ErrorCallback(SMBUS_HandleTypeDef *hsmbus)
		1788	{
		1789	/* Prevent unused argument(s) compilation warning */
		1790	UNUSED(hsmbus);
		1791
		1792	/* NOTE : This function should not be modified, when the callback is needed,
		1793	the HAL_SMBUS_ErrorCallback() could be implemented in the user file
		1794	*/
		1795	}
		1796
		1797	/**
		1798	* @}
		1799	*/
		1800
		1801	/** @defgroup SMBUS_Exported_Functions_Group3 Peripheral State and Errors functions
6	mjames	1802	* @brief Peripheral State and Errors functions
		1803	*
2	mjames	1804	@verbatim
		1805	===============================================================================
		1806	##### Peripheral State and Errors functions #####
		1807	===============================================================================
		1808	[..]
		1809	This subsection permits to get in run-time the status of the peripheral
		1810	and the data flow.
		1811
		1812	@endverbatim
		1813	* @{
		1814	*/
		1815
		1816	/**
		1817	* @brief Return the SMBUS handle state.
		1818	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		1819	* the configuration information for the specified SMBUS.
		1820	* @retval HAL state
		1821	*/
		1822	uint32_t HAL_SMBUS_GetState(SMBUS_HandleTypeDef *hsmbus)
		1823	{
		1824	/* Return SMBUS handle state */
		1825	return hsmbus->State;
		1826	}
		1827
		1828	/**
6	mjames	1829	* @brief Return the SMBUS error code.
2	mjames	1830	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		1831	* the configuration information for the specified SMBUS.
6	mjames	1832	* @retval SMBUS Error Code
		1833	*/
2	mjames	1834	uint32_t HAL_SMBUS_GetError(SMBUS_HandleTypeDef *hsmbus)
		1835	{
		1836	return hsmbus->ErrorCode;
		1837	}
		1838
		1839	/**
		1840	* @}
		1841	*/
		1842
		1843	/**
		1844	* @}
		1845	*/
		1846
		1847	/** @addtogroup SMBUS_Private_Functions SMBUS Private Functions
6	mjames	1848	* @brief Data transfers Private functions
2	mjames	1849	* @{
		1850	*/
		1851
		1852	/**
		1853	* @brief Interrupt Sub-Routine which handle the Interrupt Flags Master Mode.
		1854	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		1855	* the configuration information for the specified SMBUS.
		1856	* @param StatusFlags Value of Interrupt Flags.
		1857	* @retval HAL status
		1858	*/
6	mjames	1859	static HAL_StatusTypeDef SMBUS_Master_ISR(SMBUS_HandleTypeDef *hsmbus, uint32_t StatusFlags)
2	mjames	1860	{
		1861	uint16_t DevAddress;
		1862
		1863	/* Process Locked */
		1864	__HAL_LOCK(hsmbus);
		1865
		1866	if (SMBUS_CHECK_FLAG(StatusFlags, SMBUS_FLAG_AF) != RESET)
		1867	{
		1868	/* Clear NACK Flag */
		1869	__HAL_SMBUS_CLEAR_FLAG(hsmbus, SMBUS_FLAG_AF);
		1870
		1871	/* Set corresponding Error Code */
		1872	/* No need to generate STOP, it is automatically done */
		1873	hsmbus->ErrorCode \|= HAL_SMBUS_ERROR_ACKF;
		1874
		1875	/* Process Unlocked */
		1876	__HAL_UNLOCK(hsmbus);
		1877
		1878	/* Call the Error callback to inform upper layer */
		1879	#if (USE_HAL_SMBUS_REGISTER_CALLBACKS == 1)
		1880	hsmbus->ErrorCallback(hsmbus);
		1881	#else
		1882	HAL_SMBUS_ErrorCallback(hsmbus);
		1883	#endif /* USE_HAL_SMBUS_REGISTER_CALLBACKS */
		1884	}
		1885	else if (SMBUS_CHECK_FLAG(StatusFlags, SMBUS_FLAG_STOPF) != RESET)
		1886	{
		1887	/* Check and treat errors if errors occurs during STOP process */
		1888	SMBUS_ITErrorHandler(hsmbus);
		1889
		1890	/* Call the corresponding callback to inform upper layer of End of Transfer */
		1891	if (hsmbus->State == HAL_SMBUS_STATE_MASTER_BUSY_TX)
		1892	{
		1893	/* Disable Interrupt */
		1894	SMBUS_Disable_IRQ(hsmbus, SMBUS_IT_TX);
		1895
		1896	/* Clear STOP Flag */
		1897	__HAL_SMBUS_CLEAR_FLAG(hsmbus, SMBUS_FLAG_STOPF);
		1898
		1899	/* Clear Configuration Register 2 */
		1900	SMBUS_RESET_CR2(hsmbus);
		1901
		1902	/* Flush remaining data in Fifo register in case of error occurs before TXEmpty */
		1903	/* Disable the selected SMBUS peripheral */
		1904	__HAL_SMBUS_DISABLE(hsmbus);
		1905
		1906	hsmbus->PreviousState = HAL_SMBUS_STATE_READY;
		1907	hsmbus->State = HAL_SMBUS_STATE_READY;
		1908
		1909	/* Process Unlocked */
		1910	__HAL_UNLOCK(hsmbus);
		1911
6	mjames	1912	/* Re-enable the selected SMBUS peripheral */
2	mjames	1913	__HAL_SMBUS_ENABLE(hsmbus);
		1914
		1915	/* Call the corresponding callback to inform upper layer of End of Transfer */
		1916	#if (USE_HAL_SMBUS_REGISTER_CALLBACKS == 1)
		1917	hsmbus->MasterTxCpltCallback(hsmbus);
		1918	#else
		1919	HAL_SMBUS_MasterTxCpltCallback(hsmbus);
		1920	#endif /* USE_HAL_SMBUS_REGISTER_CALLBACKS */
		1921	}
		1922	else if (hsmbus->State == HAL_SMBUS_STATE_MASTER_BUSY_RX)
		1923	{
		1924	/* Store Last receive data if any */
		1925	if (SMBUS_CHECK_FLAG(StatusFlags, SMBUS_FLAG_RXNE) != RESET)
		1926	{
		1927	/* Read data from RXDR */
		1928	*hsmbus->pBuffPtr = (uint8_t)(hsmbus->Instance->RXDR);
		1929
		1930	/* Increment Buffer pointer */
		1931	hsmbus->pBuffPtr++;
		1932
		1933	if ((hsmbus->XferSize > 0U))
		1934	{
		1935	hsmbus->XferSize--;
		1936	hsmbus->XferCount--;
		1937	}
		1938	}
		1939
		1940	/* Disable Interrupt */
		1941	SMBUS_Disable_IRQ(hsmbus, SMBUS_IT_RX);
		1942
		1943	/* Clear STOP Flag */
		1944	__HAL_SMBUS_CLEAR_FLAG(hsmbus, SMBUS_FLAG_STOPF);
		1945
		1946	/* Clear Configuration Register 2 */
		1947	SMBUS_RESET_CR2(hsmbus);
		1948
		1949	hsmbus->PreviousState = HAL_SMBUS_STATE_READY;
		1950	hsmbus->State = HAL_SMBUS_STATE_READY;
		1951
		1952	/* Process Unlocked */
		1953	__HAL_UNLOCK(hsmbus);
		1954
		1955	/* Call the corresponding callback to inform upper layer of End of Transfer */
		1956	#if (USE_HAL_SMBUS_REGISTER_CALLBACKS == 1)
		1957	hsmbus->MasterRxCpltCallback(hsmbus);
		1958	#else
		1959	HAL_SMBUS_MasterRxCpltCallback(hsmbus);
		1960	#endif /* USE_HAL_SMBUS_REGISTER_CALLBACKS */
		1961	}
		1962	else
		1963	{
		1964	/* Nothing to do */
		1965	}
		1966	}
		1967	else if (SMBUS_CHECK_FLAG(StatusFlags, SMBUS_FLAG_RXNE) != RESET)
		1968	{
		1969	/* Read data from RXDR */
		1970	*hsmbus->pBuffPtr = (uint8_t)(hsmbus->Instance->RXDR);
		1971
		1972	/* Increment Buffer pointer */
		1973	hsmbus->pBuffPtr++;
		1974
		1975	/* Increment Size counter */
		1976	hsmbus->XferSize--;
		1977	hsmbus->XferCount--;
		1978	}
		1979	else if (SMBUS_CHECK_FLAG(StatusFlags, SMBUS_FLAG_TXIS) != RESET)
		1980	{
		1981	/* Write data to TXDR */
		1982	hsmbus->Instance->TXDR = *hsmbus->pBuffPtr;
		1983
		1984	/* Increment Buffer pointer */
		1985	hsmbus->pBuffPtr++;
		1986
		1987	/* Increment Size counter */
		1988	hsmbus->XferSize--;
		1989	hsmbus->XferCount--;
		1990	}
		1991	else if (SMBUS_CHECK_FLAG(StatusFlags, SMBUS_FLAG_TCR) != RESET)
		1992	{
		1993	if ((hsmbus->XferCount != 0U) && (hsmbus->XferSize == 0U))
		1994	{
		1995	DevAddress = (uint16_t)(hsmbus->Instance->CR2 & I2C_CR2_SADD);
		1996
		1997	if (hsmbus->XferCount > MAX_NBYTE_SIZE)
		1998	{
6	mjames	1999	SMBUS_TransferConfig(hsmbus, DevAddress, MAX_NBYTE_SIZE,
		2000	(SMBUS_RELOAD_MODE \| (hsmbus->XferOptions & SMBUS_SENDPEC_MODE)),
		2001	SMBUS_NO_STARTSTOP);
2	mjames	2002	hsmbus->XferSize = MAX_NBYTE_SIZE;
		2003	}
		2004	else
		2005	{
		2006	hsmbus->XferSize = hsmbus->XferCount;
6	mjames	2007	SMBUS_TransferConfig(hsmbus, DevAddress, (uint8_t)hsmbus->XferSize, hsmbus->XferOptions,
		2008	SMBUS_NO_STARTSTOP);
2	mjames	2009	/* If PEC mode is enable, size to transmit should be Size-1 byte, corresponding to PEC byte */
		2010	/* PEC byte is automatically sent by HW block, no need to manage it in Transmit process */
		2011	if (SMBUS_GET_PEC_MODE(hsmbus) != 0UL)
		2012	{
		2013	hsmbus->XferSize--;
		2014	hsmbus->XferCount--;
		2015	}
		2016	}
		2017	}
		2018	else if ((hsmbus->XferCount == 0U) && (hsmbus->XferSize == 0U))
		2019	{
		2020	/* Call TxCpltCallback() if no stop mode is set */
		2021	if (SMBUS_GET_STOP_MODE(hsmbus) != SMBUS_AUTOEND_MODE)
		2022	{
		2023	/* Call the corresponding callback to inform upper layer of End of Transfer */
		2024	if (hsmbus->State == HAL_SMBUS_STATE_MASTER_BUSY_TX)
		2025	{
		2026	/* Disable Interrupt */
		2027	SMBUS_Disable_IRQ(hsmbus, SMBUS_IT_TX);
		2028	hsmbus->PreviousState = hsmbus->State;
		2029	hsmbus->State = HAL_SMBUS_STATE_READY;
		2030
		2031	/* Process Unlocked */
		2032	__HAL_UNLOCK(hsmbus);
		2033
		2034	/* Call the corresponding callback to inform upper layer of End of Transfer */
		2035	#if (USE_HAL_SMBUS_REGISTER_CALLBACKS == 1)
		2036	hsmbus->MasterTxCpltCallback(hsmbus);
		2037	#else
		2038	HAL_SMBUS_MasterTxCpltCallback(hsmbus);
		2039	#endif /* USE_HAL_SMBUS_REGISTER_CALLBACKS */
		2040	}
		2041	else if (hsmbus->State == HAL_SMBUS_STATE_MASTER_BUSY_RX)
		2042	{
		2043	SMBUS_Disable_IRQ(hsmbus, SMBUS_IT_RX);
		2044	hsmbus->PreviousState = hsmbus->State;
		2045	hsmbus->State = HAL_SMBUS_STATE_READY;
		2046
		2047	/* Process Unlocked */
		2048	__HAL_UNLOCK(hsmbus);
		2049
		2050	/* Call the corresponding callback to inform upper layer of End of Transfer */
		2051	#if (USE_HAL_SMBUS_REGISTER_CALLBACKS == 1)
		2052	hsmbus->MasterRxCpltCallback(hsmbus);
		2053	#else
		2054	HAL_SMBUS_MasterRxCpltCallback(hsmbus);
		2055	#endif /* USE_HAL_SMBUS_REGISTER_CALLBACKS */
		2056	}
		2057	else
		2058	{
		2059	/* Nothing to do */
		2060	}
		2061	}
		2062	}
		2063	else
		2064	{
		2065	/* Nothing to do */
		2066	}
		2067	}
		2068	else if (SMBUS_CHECK_FLAG(StatusFlags, SMBUS_FLAG_TC) != RESET)
		2069	{
		2070	if (hsmbus->XferCount == 0U)
		2071	{
		2072	/* Specific use case for Quick command */
		2073	if (hsmbus->pBuffPtr == NULL)
		2074	{
		2075	/* Generate a Stop command */
		2076	hsmbus->Instance->CR2 \|= I2C_CR2_STOP;
		2077	}
		2078	/* Call TxCpltCallback() if no stop mode is set */
		2079	else if (SMBUS_GET_STOP_MODE(hsmbus) != SMBUS_AUTOEND_MODE)
		2080	{
		2081	/* No Generate Stop, to permit restart mode */
		2082	/* The stop will be done at the end of transfer, when SMBUS_AUTOEND_MODE enable */
		2083
		2084	/* Call the corresponding callback to inform upper layer of End of Transfer */
		2085	if (hsmbus->State == HAL_SMBUS_STATE_MASTER_BUSY_TX)
		2086	{
		2087	/* Disable Interrupt */
		2088	SMBUS_Disable_IRQ(hsmbus, SMBUS_IT_TX);
		2089	hsmbus->PreviousState = hsmbus->State;
		2090	hsmbus->State = HAL_SMBUS_STATE_READY;
		2091
		2092	/* Process Unlocked */
		2093	__HAL_UNLOCK(hsmbus);
		2094
		2095	/* Call the corresponding callback to inform upper layer of End of Transfer */
		2096	#if (USE_HAL_SMBUS_REGISTER_CALLBACKS == 1)
		2097	hsmbus->MasterTxCpltCallback(hsmbus);
		2098	#else
		2099	HAL_SMBUS_MasterTxCpltCallback(hsmbus);
		2100	#endif /* USE_HAL_SMBUS_REGISTER_CALLBACKS */
		2101	}
		2102	else if (hsmbus->State == HAL_SMBUS_STATE_MASTER_BUSY_RX)
		2103	{
		2104	SMBUS_Disable_IRQ(hsmbus, SMBUS_IT_RX);
		2105	hsmbus->PreviousState = hsmbus->State;
		2106	hsmbus->State = HAL_SMBUS_STATE_READY;
		2107
		2108	/* Process Unlocked */
		2109	__HAL_UNLOCK(hsmbus);
		2110
		2111	/* Call the corresponding callback to inform upper layer of End of Transfer */
		2112	#if (USE_HAL_SMBUS_REGISTER_CALLBACKS == 1)
		2113	hsmbus->MasterRxCpltCallback(hsmbus);
		2114	#else
		2115	HAL_SMBUS_MasterRxCpltCallback(hsmbus);
		2116	#endif /* USE_HAL_SMBUS_REGISTER_CALLBACKS */
		2117	}
		2118	else
		2119	{
		2120	/* Nothing to do */
		2121	}
		2122	}
		2123	else
		2124	{
		2125	/* Nothing to do */
		2126	}
		2127	}
		2128	}
		2129	else
		2130	{
		2131	/* Nothing to do */
		2132	}
		2133
		2134	/* Process Unlocked */
		2135	__HAL_UNLOCK(hsmbus);
		2136
		2137	return HAL_OK;
		2138	}
		2139	/**
		2140	* @brief Interrupt Sub-Routine which handle the Interrupt Flags Slave Mode.
		2141	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		2142	* the configuration information for the specified SMBUS.
		2143	* @param StatusFlags Value of Interrupt Flags.
		2144	* @retval HAL status
		2145	*/
6	mjames	2146	static HAL_StatusTypeDef SMBUS_Slave_ISR(SMBUS_HandleTypeDef *hsmbus, uint32_t StatusFlags)
2	mjames	2147	{
		2148	uint8_t TransferDirection;
		2149	uint16_t SlaveAddrCode;
		2150
		2151	/* Process Locked */
		2152	__HAL_LOCK(hsmbus);
		2153
		2154	if (SMBUS_CHECK_FLAG(StatusFlags, SMBUS_FLAG_AF) != RESET)
		2155	{
		2156	/* Check that SMBUS transfer finished */
		2157	/* if yes, normal usecase, a NACK is sent by the HOST when Transfer is finished */
		2158	/* Mean XferCount == 0*/
		2159	/* So clear Flag NACKF only */
		2160	if (hsmbus->XferCount == 0U)
		2161	{
		2162	/* Clear NACK Flag */
		2163	__HAL_SMBUS_CLEAR_FLAG(hsmbus, SMBUS_FLAG_AF);
		2164
		2165	/* Process Unlocked */
		2166	__HAL_UNLOCK(hsmbus);
		2167	}
		2168	else
		2169	{
		2170	/* if no, error usecase, a Non-Acknowledge of last Data is generated by the HOST*/
		2171	/* Clear NACK Flag */
		2172	__HAL_SMBUS_CLEAR_FLAG(hsmbus, SMBUS_FLAG_AF);
		2173
		2174	/* Set HAL State to "Idle" State, mean to LISTEN state */
		2175	/* So reset Slave Busy state */
		2176	hsmbus->PreviousState = hsmbus->State;
		2177	hsmbus->State &= ~((uint32_t)HAL_SMBUS_STATE_SLAVE_BUSY_TX);
		2178	hsmbus->State &= ~((uint32_t)HAL_SMBUS_STATE_SLAVE_BUSY_RX);
		2179
		2180	/* Disable RX/TX Interrupts, keep only ADDR Interrupt */
		2181	SMBUS_Disable_IRQ(hsmbus, SMBUS_IT_RX \| SMBUS_IT_TX);
		2182
		2183	/* Set ErrorCode corresponding to a Non-Acknowledge */
		2184	hsmbus->ErrorCode \|= HAL_SMBUS_ERROR_ACKF;
		2185
		2186	/* Process Unlocked */
		2187	__HAL_UNLOCK(hsmbus);
		2188
		2189	/* Call the Error callback to inform upper layer */
		2190	#if (USE_HAL_SMBUS_REGISTER_CALLBACKS == 1)
		2191	hsmbus->ErrorCallback(hsmbus);
		2192	#else
		2193	HAL_SMBUS_ErrorCallback(hsmbus);
		2194	#endif /* USE_HAL_SMBUS_REGISTER_CALLBACKS */
		2195	}
		2196	}
		2197	else if (SMBUS_CHECK_FLAG(StatusFlags, SMBUS_FLAG_ADDR) != RESET)
		2198	{
		2199	TransferDirection = (uint8_t)(SMBUS_GET_DIR(hsmbus));
		2200	SlaveAddrCode = (uint16_t)(SMBUS_GET_ADDR_MATCH(hsmbus));
		2201
		2202	/* Disable ADDR interrupt to prevent multiple ADDRInterrupt*/
		2203	/* Other ADDRInterrupt will be treat in next Listen usecase */
		2204	__HAL_SMBUS_DISABLE_IT(hsmbus, SMBUS_IT_ADDRI);
		2205
		2206	/* Process Unlocked */
		2207	__HAL_UNLOCK(hsmbus);
		2208
		2209	/* Call Slave Addr callback */
		2210	#if (USE_HAL_SMBUS_REGISTER_CALLBACKS == 1)
		2211	hsmbus->AddrCallback(hsmbus, TransferDirection, SlaveAddrCode);
		2212	#else
		2213	HAL_SMBUS_AddrCallback(hsmbus, TransferDirection, SlaveAddrCode);
		2214	#endif /* USE_HAL_SMBUS_REGISTER_CALLBACKS */
		2215	}
6	mjames	2216	else if ((SMBUS_CHECK_FLAG(StatusFlags, SMBUS_FLAG_RXNE) != RESET) \|\|
		2217	(SMBUS_CHECK_FLAG(StatusFlags, SMBUS_FLAG_TCR) != RESET))
2	mjames	2218	{
		2219	if ((hsmbus->State & HAL_SMBUS_STATE_SLAVE_BUSY_RX) == HAL_SMBUS_STATE_SLAVE_BUSY_RX)
		2220	{
		2221	/* Read data from RXDR */
		2222	*hsmbus->pBuffPtr = (uint8_t)(hsmbus->Instance->RXDR);
		2223
		2224	/* Increment Buffer pointer */
		2225	hsmbus->pBuffPtr++;
		2226
		2227	hsmbus->XferSize--;
		2228	hsmbus->XferCount--;
		2229
		2230	if (hsmbus->XferCount == 1U)
		2231	{
		2232	/* Receive last Byte, can be PEC byte in case of PEC BYTE enabled */
		2233	/* or only the last Byte of Transfer */
		2234	/* So reset the RELOAD bit mode */
		2235	hsmbus->XferOptions &= ~SMBUS_RELOAD_MODE;
		2236	SMBUS_TransferConfig(hsmbus, 0, 1, hsmbus->XferOptions, SMBUS_NO_STARTSTOP);
		2237	}
		2238	else if (hsmbus->XferCount == 0U)
		2239	{
		2240	/* Last Byte is received, disable Interrupt */
		2241	SMBUS_Disable_IRQ(hsmbus, SMBUS_IT_RX);
		2242
		2243	/* Remove HAL_SMBUS_STATE_SLAVE_BUSY_RX, keep only HAL_SMBUS_STATE_LISTEN */
		2244	hsmbus->PreviousState = hsmbus->State;
		2245	hsmbus->State &= ~((uint32_t)HAL_SMBUS_STATE_SLAVE_BUSY_RX);
		2246
		2247	/* Process Unlocked */
		2248	__HAL_UNLOCK(hsmbus);
		2249
		2250	/* Call the corresponding callback to inform upper layer of End of Transfer */
		2251	#if (USE_HAL_SMBUS_REGISTER_CALLBACKS == 1)
		2252	hsmbus->SlaveRxCpltCallback(hsmbus);
		2253	#else
		2254	HAL_SMBUS_SlaveRxCpltCallback(hsmbus);
		2255	#endif /* USE_HAL_SMBUS_REGISTER_CALLBACKS */
		2256	}
		2257	else
		2258	{
		2259	/* Set Reload for next Bytes */
6	mjames	2260	SMBUS_TransferConfig(hsmbus, 0, 1,
		2261	SMBUS_RELOAD_MODE \| (hsmbus->XferOptions & SMBUS_SENDPEC_MODE),
		2262	SMBUS_NO_STARTSTOP);
2	mjames	2263
		2264	/* Ack last Byte Read */
		2265	hsmbus->Instance->CR2 &= ~I2C_CR2_NACK;
		2266	}
		2267	}
		2268	else if ((hsmbus->State & HAL_SMBUS_STATE_SLAVE_BUSY_TX) == HAL_SMBUS_STATE_SLAVE_BUSY_TX)
		2269	{
		2270	if ((hsmbus->XferCount != 0U) && (hsmbus->XferSize == 0U))
		2271	{
		2272	if (hsmbus->XferCount > MAX_NBYTE_SIZE)
		2273	{
6	mjames	2274	SMBUS_TransferConfig(hsmbus, 0, MAX_NBYTE_SIZE,
		2275	(SMBUS_RELOAD_MODE \| (hsmbus->XferOptions & SMBUS_SENDPEC_MODE)),
		2276	SMBUS_NO_STARTSTOP);
2	mjames	2277	hsmbus->XferSize = MAX_NBYTE_SIZE;
		2278	}
		2279	else
		2280	{
		2281	hsmbus->XferSize = hsmbus->XferCount;
6	mjames	2282	SMBUS_TransferConfig(hsmbus, 0, (uint8_t)hsmbus->XferSize, hsmbus->XferOptions,
		2283	SMBUS_NO_STARTSTOP);
2	mjames	2284	/* If PEC mode is enable, size to transmit should be Size-1 byte, corresponding to PEC byte */
		2285	/* PEC byte is automatically sent by HW block, no need to manage it in Transmit process */
		2286	if (SMBUS_GET_PEC_MODE(hsmbus) != 0UL)
		2287	{
		2288	hsmbus->XferSize--;
		2289	hsmbus->XferCount--;
		2290	}
		2291	}
		2292	}
		2293	}
		2294	else
		2295	{
		2296	/* Nothing to do */
		2297	}
		2298	}
		2299	else if (SMBUS_CHECK_FLAG(StatusFlags, SMBUS_FLAG_TXIS) != RESET)
		2300	{
		2301	/* Write data to TXDR only if XferCount not reach "0" */
		2302	/* A TXIS flag can be set, during STOP treatment */
		2303	/* Check if all Data have already been sent */
		2304	/* If it is the case, this last write in TXDR is not sent, correspond to a dummy TXIS event */
		2305	if (hsmbus->XferCount > 0U)
		2306	{
		2307	/* Write data to TXDR */
		2308	hsmbus->Instance->TXDR = *hsmbus->pBuffPtr;
		2309
		2310	/* Increment Buffer pointer */
		2311	hsmbus->pBuffPtr++;
		2312
		2313	hsmbus->XferCount--;
		2314	hsmbus->XferSize--;
		2315	}
		2316
		2317	if (hsmbus->XferCount == 0U)
		2318	{
		2319	/* Last Byte is Transmitted */
		2320	/* Remove HAL_SMBUS_STATE_SLAVE_BUSY_TX, keep only HAL_SMBUS_STATE_LISTEN */
		2321	SMBUS_Disable_IRQ(hsmbus, SMBUS_IT_TX);
		2322	hsmbus->PreviousState = hsmbus->State;
		2323	hsmbus->State &= ~((uint32_t)HAL_SMBUS_STATE_SLAVE_BUSY_TX);
		2324
		2325	/* Process Unlocked */
		2326	__HAL_UNLOCK(hsmbus);
		2327
		2328	/* Call the corresponding callback to inform upper layer of End of Transfer */
		2329	#if (USE_HAL_SMBUS_REGISTER_CALLBACKS == 1)
		2330	hsmbus->SlaveTxCpltCallback(hsmbus);
		2331	#else
		2332	HAL_SMBUS_SlaveTxCpltCallback(hsmbus);
		2333	#endif /* USE_HAL_SMBUS_REGISTER_CALLBACKS */
		2334	}
		2335	}
		2336	else
		2337	{
		2338	/* Nothing to do */
		2339	}
		2340
		2341	/* Check if STOPF is set */
		2342	if (SMBUS_CHECK_FLAG(StatusFlags, SMBUS_FLAG_STOPF) != RESET)
		2343	{
		2344	if ((hsmbus->State & HAL_SMBUS_STATE_LISTEN) == HAL_SMBUS_STATE_LISTEN)
		2345	{
		2346	/* Store Last receive data if any */
		2347	if (__HAL_SMBUS_GET_FLAG(hsmbus, SMBUS_FLAG_RXNE) != RESET)
		2348	{
		2349	/* Read data from RXDR */
		2350	*hsmbus->pBuffPtr = (uint8_t)(hsmbus->Instance->RXDR);
		2351
		2352	/* Increment Buffer pointer */
		2353	hsmbus->pBuffPtr++;
		2354
		2355	if ((hsmbus->XferSize > 0U))
		2356	{
		2357	hsmbus->XferSize--;
		2358	hsmbus->XferCount--;
		2359	}
		2360	}
		2361
		2362	/* Disable RX and TX Interrupts */
		2363	SMBUS_Disable_IRQ(hsmbus, SMBUS_IT_RX \| SMBUS_IT_TX);
		2364
		2365	/* Disable ADDR Interrupt */
		2366	SMBUS_Disable_IRQ(hsmbus, SMBUS_IT_ADDR);
		2367
		2368	/* Disable Address Acknowledge */
		2369	hsmbus->Instance->CR2 \|= I2C_CR2_NACK;
		2370
		2371	/* Clear Configuration Register 2 */
		2372	SMBUS_RESET_CR2(hsmbus);
		2373
		2374	/* Clear STOP Flag */
		2375	__HAL_SMBUS_CLEAR_FLAG(hsmbus, SMBUS_FLAG_STOPF);
		2376
		2377	/* Clear ADDR flag */
		2378	__HAL_SMBUS_CLEAR_FLAG(hsmbus, SMBUS_FLAG_ADDR);
		2379
		2380	hsmbus->XferOptions = 0;
		2381	hsmbus->PreviousState = hsmbus->State;
		2382	hsmbus->State = HAL_SMBUS_STATE_READY;
		2383
		2384	/* Process Unlocked */
		2385	__HAL_UNLOCK(hsmbus);
		2386
		2387	/* Call the Listen Complete callback, to inform upper layer of the end of Listen usecase */
		2388	#if (USE_HAL_SMBUS_REGISTER_CALLBACKS == 1)
		2389	hsmbus->ListenCpltCallback(hsmbus);
		2390	#else
		2391	HAL_SMBUS_ListenCpltCallback(hsmbus);
		2392	#endif /* USE_HAL_SMBUS_REGISTER_CALLBACKS */
		2393	}
		2394	}
		2395
		2396	/* Process Unlocked */
		2397	__HAL_UNLOCK(hsmbus);
		2398
		2399	return HAL_OK;
		2400	}
		2401	/**
		2402	* @brief Manage the enabling of Interrupts.
		2403	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		2404	* the configuration information for the specified SMBUS.
		2405	* @param InterruptRequest Value of @ref SMBUS_Interrupt_configuration_definition.
		2406	* @retval HAL status
		2407	*/
6	mjames	2408	static void SMBUS_Enable_IRQ(SMBUS_HandleTypeDef *hsmbus, uint32_t InterruptRequest)
2	mjames	2409	{
		2410	uint32_t tmpisr = 0UL;
		2411
		2412	if ((InterruptRequest & SMBUS_IT_ALERT) == SMBUS_IT_ALERT)
		2413	{
		2414	/* Enable ERR interrupt */
		2415	tmpisr \|= SMBUS_IT_ERRI;
		2416	}
		2417
		2418	if ((InterruptRequest & SMBUS_IT_ADDR) == SMBUS_IT_ADDR)
		2419	{
		2420	/* Enable ADDR, STOP interrupt */
		2421	tmpisr \|= SMBUS_IT_ADDRI \| SMBUS_IT_STOPI \| SMBUS_IT_NACKI \| SMBUS_IT_ERRI;
		2422	}
		2423
		2424	if ((InterruptRequest & SMBUS_IT_TX) == SMBUS_IT_TX)
		2425	{
		2426	/* Enable ERR, TC, STOP, NACK, RXI interrupt */
		2427	tmpisr \|= SMBUS_IT_ERRI \| SMBUS_IT_TCI \| SMBUS_IT_STOPI \| SMBUS_IT_NACKI \| SMBUS_IT_TXI;
		2428	}
		2429
		2430	if ((InterruptRequest & SMBUS_IT_RX) == SMBUS_IT_RX)
		2431	{
		2432	/* Enable ERR, TC, STOP, NACK, TXI interrupt */
		2433	tmpisr \|= SMBUS_IT_ERRI \| SMBUS_IT_TCI \| SMBUS_IT_STOPI \| SMBUS_IT_NACKI \| SMBUS_IT_RXI;
		2434	}
		2435
		2436	/* Enable interrupts only at the end */
		2437	/* to avoid the risk of SMBUS interrupt handle execution before */
		2438	/* all interrupts requested done */
		2439	__HAL_SMBUS_ENABLE_IT(hsmbus, tmpisr);
		2440	}
		2441	/**
		2442	* @brief Manage the disabling of Interrupts.
		2443	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		2444	* the configuration information for the specified SMBUS.
		2445	* @param InterruptRequest Value of @ref SMBUS_Interrupt_configuration_definition.
		2446	* @retval HAL status
		2447	*/
6	mjames	2448	static void SMBUS_Disable_IRQ(SMBUS_HandleTypeDef *hsmbus, uint32_t InterruptRequest)
2	mjames	2449	{
		2450	uint32_t tmpisr = 0UL;
		2451	uint32_t tmpstate = hsmbus->State;
		2452
		2453	if ((tmpstate == HAL_SMBUS_STATE_READY) && ((InterruptRequest & SMBUS_IT_ALERT) == SMBUS_IT_ALERT))
		2454	{
		2455	/* Disable ERR interrupt */
		2456	tmpisr \|= SMBUS_IT_ERRI;
		2457	}
		2458
		2459	if ((InterruptRequest & SMBUS_IT_TX) == SMBUS_IT_TX)
		2460	{
		2461	/* Disable TC, STOP, NACK and TXI interrupt */
		2462	tmpisr \|= SMBUS_IT_TCI \| SMBUS_IT_TXI;
		2463
		2464	if ((SMBUS_GET_ALERT_ENABLED(hsmbus) == 0UL)
		2465	&& ((tmpstate & HAL_SMBUS_STATE_LISTEN) != HAL_SMBUS_STATE_LISTEN))
		2466	{
		2467	/* Disable ERR interrupt */
		2468	tmpisr \|= SMBUS_IT_ERRI;
		2469	}
		2470
		2471	if ((tmpstate & HAL_SMBUS_STATE_LISTEN) != HAL_SMBUS_STATE_LISTEN)
		2472	{
		2473	/* Disable STOP and NACK interrupt */
		2474	tmpisr \|= SMBUS_IT_STOPI \| SMBUS_IT_NACKI;
		2475	}
		2476	}
		2477
		2478	if ((InterruptRequest & SMBUS_IT_RX) == SMBUS_IT_RX)
		2479	{
		2480	/* Disable TC, STOP, NACK and RXI interrupt */
		2481	tmpisr \|= SMBUS_IT_TCI \| SMBUS_IT_RXI;
		2482
		2483	if ((SMBUS_GET_ALERT_ENABLED(hsmbus) == 0UL)
		2484	&& ((tmpstate & HAL_SMBUS_STATE_LISTEN) != HAL_SMBUS_STATE_LISTEN))
		2485	{
		2486	/* Disable ERR interrupt */
		2487	tmpisr \|= SMBUS_IT_ERRI;
		2488	}
		2489
		2490	if ((tmpstate & HAL_SMBUS_STATE_LISTEN) != HAL_SMBUS_STATE_LISTEN)
		2491	{
		2492	/* Disable STOP and NACK interrupt */
		2493	tmpisr \|= SMBUS_IT_STOPI \| SMBUS_IT_NACKI;
		2494	}
		2495	}
		2496
		2497	if ((InterruptRequest & SMBUS_IT_ADDR) == SMBUS_IT_ADDR)
		2498	{
		2499	/* Disable ADDR, STOP and NACK interrupt */
		2500	tmpisr \|= SMBUS_IT_ADDRI \| SMBUS_IT_STOPI \| SMBUS_IT_NACKI;
		2501
		2502	if (SMBUS_GET_ALERT_ENABLED(hsmbus) == 0UL)
		2503	{
		2504	/* Disable ERR interrupt */
		2505	tmpisr \|= SMBUS_IT_ERRI;
		2506	}
		2507	}
		2508
		2509	/* Disable interrupts only at the end */
		2510	/* to avoid a breaking situation like at "t" time */
		2511	/* all disable interrupts request are not done */
		2512	__HAL_SMBUS_DISABLE_IT(hsmbus, tmpisr);
		2513	}
		2514
		2515	/**
		2516	* @brief SMBUS interrupts error handler.
		2517	* @param hsmbus SMBUS handle.
		2518	* @retval None
		2519	*/
6	mjames	2520	static void SMBUS_ITErrorHandler(SMBUS_HandleTypeDef *hsmbus)
2	mjames	2521	{
		2522	uint32_t itflags = READ_REG(hsmbus->Instance->ISR);
		2523	uint32_t itsources = READ_REG(hsmbus->Instance->CR1);
		2524	uint32_t tmpstate;
		2525	uint32_t tmperror;
		2526
		2527	/* SMBUS Bus error interrupt occurred ------------------------------------*/
6	mjames	2528	if (((itflags & SMBUS_FLAG_BERR) == SMBUS_FLAG_BERR) && \
		2529	((itsources & SMBUS_IT_ERRI) == SMBUS_IT_ERRI))
2	mjames	2530	{
		2531	hsmbus->ErrorCode \|= HAL_SMBUS_ERROR_BERR;
		2532
		2533	/* Clear BERR flag */
		2534	__HAL_SMBUS_CLEAR_FLAG(hsmbus, SMBUS_FLAG_BERR);
		2535	}
		2536
		2537	/* SMBUS Over-Run/Under-Run interrupt occurred ----------------------------------------*/
6	mjames	2538	if (((itflags & SMBUS_FLAG_OVR) == SMBUS_FLAG_OVR) && \
		2539	((itsources & SMBUS_IT_ERRI) == SMBUS_IT_ERRI))
2	mjames	2540	{
		2541	hsmbus->ErrorCode \|= HAL_SMBUS_ERROR_OVR;
		2542
		2543	/* Clear OVR flag */
		2544	__HAL_SMBUS_CLEAR_FLAG(hsmbus, SMBUS_FLAG_OVR);
		2545	}
		2546
		2547	/* SMBUS Arbitration Loss error interrupt occurred ------------------------------------*/
6	mjames	2548	if (((itflags & SMBUS_FLAG_ARLO) == SMBUS_FLAG_ARLO) && \
		2549	((itsources & SMBUS_IT_ERRI) == SMBUS_IT_ERRI))
2	mjames	2550	{
		2551	hsmbus->ErrorCode \|= HAL_SMBUS_ERROR_ARLO;
		2552
		2553	/* Clear ARLO flag */
		2554	__HAL_SMBUS_CLEAR_FLAG(hsmbus, SMBUS_FLAG_ARLO);
		2555	}
		2556
		2557	/* SMBUS Timeout error interrupt occurred ---------------------------------------------*/
6	mjames	2558	if (((itflags & SMBUS_FLAG_TIMEOUT) == SMBUS_FLAG_TIMEOUT) && \
		2559	((itsources & SMBUS_IT_ERRI) == SMBUS_IT_ERRI))
2	mjames	2560	{
		2561	hsmbus->ErrorCode \|= HAL_SMBUS_ERROR_BUSTIMEOUT;
		2562
		2563	/* Clear TIMEOUT flag */
		2564	__HAL_SMBUS_CLEAR_FLAG(hsmbus, SMBUS_FLAG_TIMEOUT);
		2565	}
		2566
		2567	/* SMBUS Alert error interrupt occurred -----------------------------------------------*/
6	mjames	2568	if (((itflags & SMBUS_FLAG_ALERT) == SMBUS_FLAG_ALERT) && \
		2569	((itsources & SMBUS_IT_ERRI) == SMBUS_IT_ERRI))
2	mjames	2570	{
		2571	hsmbus->ErrorCode \|= HAL_SMBUS_ERROR_ALERT;
		2572
		2573	/* Clear ALERT flag */
		2574	__HAL_SMBUS_CLEAR_FLAG(hsmbus, SMBUS_FLAG_ALERT);
		2575	}
		2576
		2577	/* SMBUS Packet Error Check error interrupt occurred ----------------------------------*/
6	mjames	2578	if (((itflags & SMBUS_FLAG_PECERR) == SMBUS_FLAG_PECERR) && \
		2579	((itsources & SMBUS_IT_ERRI) == SMBUS_IT_ERRI))
2	mjames	2580	{
		2581	hsmbus->ErrorCode \|= HAL_SMBUS_ERROR_PECERR;
		2582
		2583	/* Clear PEC error flag */
		2584	__HAL_SMBUS_CLEAR_FLAG(hsmbus, SMBUS_FLAG_PECERR);
		2585	}
		2586
		2587	/* Store current volatile hsmbus->State, misra rule */
		2588	tmperror = hsmbus->ErrorCode;
		2589
		2590	/* Call the Error Callback in case of Error detected */
		2591	if ((tmperror != HAL_SMBUS_ERROR_NONE) && (tmperror != HAL_SMBUS_ERROR_ACKF))
		2592	{
		2593	/* Do not Reset the HAL state in case of ALERT error */
		2594	if ((tmperror & HAL_SMBUS_ERROR_ALERT) != HAL_SMBUS_ERROR_ALERT)
		2595	{
		2596	/* Store current volatile hsmbus->State, misra rule */
		2597	tmpstate = hsmbus->State;
		2598
		2599	if (((tmpstate & HAL_SMBUS_STATE_SLAVE_BUSY_TX) == HAL_SMBUS_STATE_SLAVE_BUSY_TX)
		2600	\|\| ((tmpstate & HAL_SMBUS_STATE_SLAVE_BUSY_RX) == HAL_SMBUS_STATE_SLAVE_BUSY_RX))
		2601	{
		2602	/* Reset only HAL_SMBUS_STATE_SLAVE_BUSY_XX */
		2603	/* keep HAL_SMBUS_STATE_LISTEN if set */
		2604	hsmbus->PreviousState = HAL_SMBUS_STATE_READY;
		2605	hsmbus->State = HAL_SMBUS_STATE_LISTEN;
		2606	}
		2607	}
		2608
		2609	/* Call the Error callback to inform upper layer */
		2610	#if (USE_HAL_SMBUS_REGISTER_CALLBACKS == 1)
		2611	hsmbus->ErrorCallback(hsmbus);
		2612	#else
		2613	HAL_SMBUS_ErrorCallback(hsmbus);
		2614	#endif /* USE_HAL_SMBUS_REGISTER_CALLBACKS */
		2615	}
		2616	}
		2617
		2618	/**
		2619	* @brief Handle SMBUS Communication Timeout.
		2620	* @param hsmbus Pointer to a SMBUS_HandleTypeDef structure that contains
		2621	* the configuration information for the specified SMBUS.
		2622	* @param Flag Specifies the SMBUS flag to check.
		2623	* @param Status The new Flag status (SET or RESET).
		2624	* @param Timeout Timeout duration
		2625	* @retval HAL status
		2626	*/
6	mjames	2627	static HAL_StatusTypeDef SMBUS_WaitOnFlagUntilTimeout(SMBUS_HandleTypeDef *hsmbus, uint32_t Flag,
		2628	FlagStatus Status, uint32_t Timeout)
2	mjames	2629	{
		2630	uint32_t tickstart = HAL_GetTick();
		2631
		2632	/* Wait until flag is set */
		2633	while ((FlagStatus)(__HAL_SMBUS_GET_FLAG(hsmbus, Flag)) == Status)
		2634	{
		2635	/* Check for the Timeout */
		2636	if (Timeout != HAL_MAX_DELAY)
		2637	{
		2638	if (((HAL_GetTick() - tickstart) > Timeout) \|\| (Timeout == 0UL))
		2639	{
		2640	hsmbus->PreviousState = hsmbus->State;
		2641	hsmbus->State = HAL_SMBUS_STATE_READY;
		2642
		2643	/* Update SMBUS error code */
		2644	hsmbus->ErrorCode \|= HAL_SMBUS_ERROR_HALTIMEOUT;
		2645
		2646	/* Process Unlocked */
		2647	__HAL_UNLOCK(hsmbus);
		2648
		2649	return HAL_ERROR;
		2650	}
		2651	}
		2652	}
		2653
		2654	return HAL_OK;
		2655	}
		2656
		2657	/**
		2658	* @brief Handle SMBUSx communication when starting transfer or during transfer (TC or TCR flag are set).
		2659	* @param hsmbus SMBUS handle.
		2660	* @param DevAddress specifies the slave address to be programmed.
		2661	* @param Size specifies the number of bytes to be programmed.
		2662	* This parameter must be a value between 0 and 255.
		2663	* @param Mode New state of the SMBUS START condition generation.
		2664	* This parameter can be one or a combination of the following values:
		2665	* @arg @ref SMBUS_RELOAD_MODE Enable Reload mode.
		2666	* @arg @ref SMBUS_AUTOEND_MODE Enable Automatic end mode.
		2667	* @arg @ref SMBUS_SOFTEND_MODE Enable Software end mode and Reload mode.
		2668	* @arg @ref SMBUS_SENDPEC_MODE Enable Packet Error Calculation mode.
		2669	* @param Request New state of the SMBUS START condition generation.
		2670	* This parameter can be one of the following values:
		2671	* @arg @ref SMBUS_NO_STARTSTOP Don't Generate stop and start condition.
		2672	* @arg @ref SMBUS_GENERATE_STOP Generate stop condition (Size should be set to 0).
		2673	* @arg @ref SMBUS_GENERATE_START_READ Generate Restart for read request.
		2674	* @arg @ref SMBUS_GENERATE_START_WRITE Generate Restart for write request.
		2675	* @retval None
		2676	*/
6	mjames	2677	static void SMBUS_TransferConfig(SMBUS_HandleTypeDef *hsmbus, uint16_t DevAddress, uint8_t Size,
		2678	uint32_t Mode, uint32_t Request)
2	mjames	2679	{
		2680	/* Check the parameters */
		2681	assert_param(IS_SMBUS_ALL_INSTANCE(hsmbus->Instance));
		2682	assert_param(IS_SMBUS_TRANSFER_MODE(Mode));
		2683	assert_param(IS_SMBUS_TRANSFER_REQUEST(Request));
		2684
		2685	/* update CR2 register */
6	mjames	2686	MODIFY_REG(hsmbus->Instance->CR2,
		2687	((I2C_CR2_SADD \| I2C_CR2_NBYTES \| I2C_CR2_RELOAD \| I2C_CR2_AUTOEND \| \
		2688	(I2C_CR2_RD_WRN & (uint32_t)(Request >> (31UL - I2C_CR2_RD_WRN_Pos))) \| \
		2689	I2C_CR2_START \| I2C_CR2_STOP \| I2C_CR2_PECBYTE)), \
		2690	(uint32_t)(((uint32_t)DevAddress & I2C_CR2_SADD) \| \
		2691	(((uint32_t)Size << I2C_CR2_NBYTES_Pos) & I2C_CR2_NBYTES) \| \
		2692	(uint32_t)Mode \| (uint32_t)Request));
2	mjames	2693	}
		2694
		2695	/**
6	mjames	2696	* @brief Convert SMBUSx OTHER_xxx XferOptions to functional XferOptions.
2	mjames	2697	* @param hsmbus SMBUS handle.
		2698	* @retval None
		2699	*/
6	mjames	2700	static void SMBUS_ConvertOtherXferOptions(SMBUS_HandleTypeDef *hsmbus)
2	mjames	2701	{
		2702	/* if user set XferOptions to SMBUS_OTHER_FRAME_NO_PEC */
		2703	/* it request implicitly to generate a restart condition */
		2704	/* set XferOptions to SMBUS_FIRST_FRAME */
		2705	if (hsmbus->XferOptions == SMBUS_OTHER_FRAME_NO_PEC)
		2706	{
		2707	hsmbus->XferOptions = SMBUS_FIRST_FRAME;
		2708	}
		2709	/* else if user set XferOptions to SMBUS_OTHER_FRAME_WITH_PEC */
		2710	/* it request implicitly to generate a restart condition */
		2711	/* set XferOptions to SMBUS_FIRST_FRAME \| SMBUS_SENDPEC_MODE */
		2712	else if (hsmbus->XferOptions == SMBUS_OTHER_FRAME_WITH_PEC)
		2713	{
		2714	hsmbus->XferOptions = SMBUS_FIRST_FRAME \| SMBUS_SENDPEC_MODE;
		2715	}
		2716	/* else if user set XferOptions to SMBUS_OTHER_AND_LAST_FRAME_NO_PEC */
		2717	/* it request implicitly to generate a restart condition */
		2718	/* then generate a stop condition at the end of transfer */
		2719	/* set XferOptions to SMBUS_FIRST_AND_LAST_FRAME_NO_PEC */
		2720	else if (hsmbus->XferOptions == SMBUS_OTHER_AND_LAST_FRAME_NO_PEC)
		2721	{
		2722	hsmbus->XferOptions = SMBUS_FIRST_AND_LAST_FRAME_NO_PEC;
		2723	}
		2724	/* else if user set XferOptions to SMBUS_OTHER_AND_LAST_FRAME_WITH_PEC */
		2725	/* it request implicitly to generate a restart condition */
		2726	/* then generate a stop condition at the end of transfer */
		2727	/* set XferOptions to SMBUS_FIRST_AND_LAST_FRAME_WITH_PEC */
		2728	else if (hsmbus->XferOptions == SMBUS_OTHER_AND_LAST_FRAME_WITH_PEC)
		2729	{
		2730	hsmbus->XferOptions = SMBUS_FIRST_AND_LAST_FRAME_WITH_PEC;
		2731	}
		2732	else
		2733	{
		2734	/* Nothing to do */
		2735	}
		2736	}
		2737	/**
		2738	* @}
		2739	*/
		2740
		2741	#endif /* HAL_SMBUS_MODULE_ENABLED */
		2742	/**
		2743	* @}
		2744	*/
		2745
		2746	/**
		2747	* @}
		2748	*/
		2749
		2750	/********************** (C) COPYRIGHT STMicroelectronics *END OF FILE**/

Subversion Repositories FuelGauge

(root)/trunk/Drivers/STM32F0xx_HAL_Driver/Src/stm32f0xx_hal_smbus.c – Rev 6