WebSVN – EDIS_Ignition – Blame – /trunk/Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_flash_ex.c

Rev	Author	Line No.	Line
2	mjames	1	/**
		2	******************************************************************************
		3	* @file stm32f1xx_hal_flash_ex.c
		4	* @author MCD Application Team
		5	* @brief Extended FLASH HAL module driver.
		6	*
		7	* This file provides firmware functions to manage the following
		8	* functionalities of the FLASH peripheral:
		9	* + Extended Initialization/de-initialization functions
		10	* + Extended I/O operation functions
		11	* + Extended Peripheral Control functions
		12	*
		13	@verbatim
		14	==============================================================================
		15	##### Flash peripheral extended features #####
		16	==============================================================================
		17
		18	##### How to use this driver #####
		19	==============================================================================
		20	[..] This driver provides functions to configure and program the FLASH memory
		21	of all STM32F1xxx devices. It includes
		22
		23	(++) Set/Reset the write protection
		24	(++) Program the user Option Bytes
		25	(++) Get the Read protection Level
		26
		27	@endverbatim
		28	******************************************************************************
		29	* @attention
		30	*
		31	* <h2><center>© Copyright (c) 2016 STMicroelectronics.
		32	* All rights reserved.</center></h2>
		33	*
		34	* This software component is licensed by ST under BSD 3-Clause license,
		35	* the "License"; You may not use this file except in compliance with the
		36	* License. You may obtain a copy of the License at:
		37	* opensource.org/licenses/BSD-3-Clause
		38	*
		39	******************************************************************************
		40	*/
		41
		42	/* Includes ------------------------------------------------------------------*/
		43	#include "stm32f1xx_hal.h"
		44
		45	/** @addtogroup STM32F1xx_HAL_Driver
		46	* @{
		47	*/
		48	#ifdef HAL_FLASH_MODULE_ENABLED
		49
		50	/** @addtogroup FLASH
		51	* @{
		52	*/
		53	/** @addtogroup FLASH_Private_Variables
		54	* @{
		55	*/
		56	/* Variables used for Erase pages under interruption*/
		57	extern FLASH_ProcessTypeDef pFlash;
		58	/**
		59	* @}
		60	*/
		61
		62	/**
		63	* @}
		64	*/
		65
		66	/** @defgroup FLASHEx FLASHEx
		67	* @brief FLASH HAL Extension module driver
		68	* @{
		69	*/
		70
		71	/* Private typedef -----------------------------------------------------------*/
		72	/* Private define ------------------------------------------------------------*/
		73	/** @defgroup FLASHEx_Private_Constants FLASHEx Private Constants
		74	* @{
		75	*/
		76	#define FLASH_POSITION_IWDGSW_BIT FLASH_OBR_IWDG_SW_Pos
		77	#define FLASH_POSITION_OB_USERDATA0_BIT FLASH_OBR_DATA0_Pos
		78	#define FLASH_POSITION_OB_USERDATA1_BIT FLASH_OBR_DATA1_Pos
		79	/**
		80	* @}
		81	*/
		82
		83	/* Private macro -------------------------------------------------------------*/
		84	/** @defgroup FLASHEx_Private_Macros FLASHEx Private Macros
		85	* @{
		86	*/
		87	/**
		88	* @}
		89	*/
		90
		91	/* Private variables ---------------------------------------------------------*/
		92	/* Private function prototypes -----------------------------------------------*/
		93	/** @defgroup FLASHEx_Private_Functions FLASHEx Private Functions
		94	* @{
		95	*/
		96	/* Erase operations */
		97	static void FLASH_MassErase(uint32_t Banks);
		98	void FLASH_PageErase(uint32_t PageAddress);
		99
		100	/* Option bytes control */
		101	static HAL_StatusTypeDef FLASH_OB_EnableWRP(uint32_t WriteProtectPage);
		102	static HAL_StatusTypeDef FLASH_OB_DisableWRP(uint32_t WriteProtectPage);
		103	static HAL_StatusTypeDef FLASH_OB_RDP_LevelConfig(uint8_t ReadProtectLevel);
		104	static HAL_StatusTypeDef FLASH_OB_UserConfig(uint8_t UserConfig);
		105	static HAL_StatusTypeDef FLASH_OB_ProgramData(uint32_t Address, uint8_t Data);
		106	static uint32_t FLASH_OB_GetWRP(void);
		107	static uint32_t FLASH_OB_GetRDP(void);
		108	static uint8_t FLASH_OB_GetUser(void);
		109
		110	/**
		111	* @}
		112	*/
		113
		114	/* Exported functions ---------------------------------------------------------*/
		115	/** @defgroup FLASHEx_Exported_Functions FLASHEx Exported Functions
		116	* @{
		117	*/
		118
		119	/** @defgroup FLASHEx_Exported_Functions_Group1 FLASHEx Memory Erasing functions
		120	* @brief FLASH Memory Erasing functions
		121	*
		122	@verbatim
		123	==============================================================================
		124	##### FLASH Erasing Programming functions #####
		125	==============================================================================
		126
		127	[..] The FLASH Memory Erasing functions, includes the following functions:
		128	(+) @ref HAL_FLASHEx_Erase: return only when erase has been done
		129	(+) @ref HAL_FLASHEx_Erase_IT: end of erase is done when @ref HAL_FLASH_EndOfOperationCallback
		130	is called with parameter 0xFFFFFFFF
		131
		132	[..] Any operation of erase should follow these steps:
		133	(#) Call the @ref HAL_FLASH_Unlock() function to enable the flash control register and
		134	program memory access.
		135	(#) Call the desired function to erase page.
		136	(#) Call the @ref HAL_FLASH_Lock() to disable the flash program memory access
		137	(recommended to protect the FLASH memory against possible unwanted operation).
		138
		139	@endverbatim
		140	* @{
		141	*/
		142
		143
		144	/**
		145	* @brief Perform a mass erase or erase the specified FLASH memory pages
		146	* @note To correctly run this function, the @ref HAL_FLASH_Unlock() function
		147	* must be called before.
		148	* Call the @ref HAL_FLASH_Lock() to disable the flash memory access
		149	* (recommended to protect the FLASH memory against possible unwanted operation)
		150	* @param[in] pEraseInit pointer to an FLASH_EraseInitTypeDef structure that
		151	* contains the configuration information for the erasing.
		152	*
		153	* @param[out] PageError pointer to variable that
		154	* contains the configuration information on faulty page in case of error
		155	* (0xFFFFFFFF means that all the pages have been correctly erased)
		156	*
		157	* @retval HAL_StatusTypeDef HAL Status
		158	*/
		159	HAL_StatusTypeDef HAL_FLASHEx_Erase(FLASH_EraseInitTypeDef pEraseInit, uint32_t PageError)
		160	{
		161	HAL_StatusTypeDef status = HAL_ERROR;
		162	uint32_t address = 0U;
		163
		164	/* Process Locked */
		165	__HAL_LOCK(&pFlash);
		166
		167	/* Check the parameters */
		168	assert_param(IS_FLASH_TYPEERASE(pEraseInit->TypeErase));
		169
		170	if (pEraseInit->TypeErase == FLASH_TYPEERASE_MASSERASE)
		171	{
		172	#if defined(FLASH_BANK2_END)
		173	if (pEraseInit->Banks == FLASH_BANK_BOTH)
		174	{
		175	/* Mass Erase requested for Bank1 and Bank2 */
		176	/* Wait for last operation to be completed */
		177	if ((FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE) == HAL_OK) && \
		178	(FLASH_WaitForLastOperationBank2((uint32_t)FLASH_TIMEOUT_VALUE) == HAL_OK))
		179	{
		180	/Mass erase to be done/
		181	FLASH_MassErase(FLASH_BANK_BOTH);
		182
		183	/* Wait for last operation to be completed */
		184	if ((FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE) == HAL_OK) && \
		185	(FLASH_WaitForLastOperationBank2((uint32_t)FLASH_TIMEOUT_VALUE) == HAL_OK))
		186	{
		187	status = HAL_OK;
		188	}
		189
		190	/* If the erase operation is completed, disable the MER Bit */
		191	CLEAR_BIT(FLASH->CR, FLASH_CR_MER);
		192	CLEAR_BIT(FLASH->CR2, FLASH_CR2_MER);
		193	}
		194	}
		195	else if (pEraseInit->Banks == FLASH_BANK_2)
		196	{
		197	/* Mass Erase requested for Bank2 */
		198	/* Wait for last operation to be completed */
		199	if (FLASH_WaitForLastOperationBank2((uint32_t)FLASH_TIMEOUT_VALUE) == HAL_OK)
		200	{
		201	/Mass erase to be done/
		202	FLASH_MassErase(FLASH_BANK_2);
		203
		204	/* Wait for last operation to be completed */
		205	status = FLASH_WaitForLastOperationBank2((uint32_t)FLASH_TIMEOUT_VALUE);
		206
		207	/* If the erase operation is completed, disable the MER Bit */
		208	CLEAR_BIT(FLASH->CR2, FLASH_CR2_MER);
		209	}
		210	}
		211	else
		212	#endif /* FLASH_BANK2_END */
		213	{
		214	/* Mass Erase requested for Bank1 */
		215	/* Wait for last operation to be completed */
		216	if (FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE) == HAL_OK)
		217	{
		218	/Mass erase to be done/
		219	FLASH_MassErase(FLASH_BANK_1);
		220
		221	/* Wait for last operation to be completed */
		222	status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);
		223
		224	/* If the erase operation is completed, disable the MER Bit */
		225	CLEAR_BIT(FLASH->CR, FLASH_CR_MER);
		226	}
		227	}
		228	}
		229	else
		230	{
		231	/* Page Erase is requested */
		232	/* Check the parameters */
		233	assert_param(IS_FLASH_PROGRAM_ADDRESS(pEraseInit->PageAddress));
		234	assert_param(IS_FLASH_NB_PAGES(pEraseInit->PageAddress, pEraseInit->NbPages));
		235
		236	#if defined(FLASH_BANK2_END)
		237	/* Page Erase requested on address located on bank2 */
		238	if(pEraseInit->PageAddress > FLASH_BANK1_END)
		239	{
		240	/* Wait for last operation to be completed */
		241	if (FLASH_WaitForLastOperationBank2((uint32_t)FLASH_TIMEOUT_VALUE) == HAL_OK)
		242	{
		243	/Initialization of PageError variable/
		244	*PageError = 0xFFFFFFFFU;
		245
		246	/* Erase by page by page to be done*/
		247	for(address = pEraseInit->PageAddress;
		248	address < (pEraseInit->PageAddress + (pEraseInit->NbPages)*FLASH_PAGE_SIZE);
		249	address += FLASH_PAGE_SIZE)
		250	{
		251	FLASH_PageErase(address);
		252
		253	/* Wait for last operation to be completed */
		254	status = FLASH_WaitForLastOperationBank2((uint32_t)FLASH_TIMEOUT_VALUE);
		255
		256	/* If the erase operation is completed, disable the PER Bit */
		257	CLEAR_BIT(FLASH->CR2, FLASH_CR2_PER);
		258
		259	if (status != HAL_OK)
		260	{
		261	/* In case of error, stop erase procedure and return the faulty address */
		262	*PageError = address;
		263	break;
		264	}
		265	}
		266	}
		267	}
		268	else
		269	#endif /* FLASH_BANK2_END */
		270	{
		271	/* Page Erase requested on address located on bank1 */
		272	/* Wait for last operation to be completed */
		273	if (FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE) == HAL_OK)
		274	{
		275	/Initialization of PageError variable/
		276	*PageError = 0xFFFFFFFFU;
		277
		278	/* Erase page by page to be done*/
		279	for(address = pEraseInit->PageAddress;
		280	address < ((pEraseInit->NbPages * FLASH_PAGE_SIZE) + pEraseInit->PageAddress);
		281	address += FLASH_PAGE_SIZE)
		282	{
		283	FLASH_PageErase(address);
		284
		285	/* Wait for last operation to be completed */
		286	status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);
		287
		288	/* If the erase operation is completed, disable the PER Bit */
		289	CLEAR_BIT(FLASH->CR, FLASH_CR_PER);
		290
		291	if (status != HAL_OK)
		292	{
		293	/* In case of error, stop erase procedure and return the faulty address */
		294	*PageError = address;
		295	break;
		296	}
		297	}
		298	}
		299	}
		300	}
		301
		302	/* Process Unlocked */
		303	__HAL_UNLOCK(&pFlash);
		304
		305	return status;
		306	}
		307
		308	/**
		309	* @brief Perform a mass erase or erase the specified FLASH memory pages with interrupt enabled
		310	* @note To correctly run this function, the @ref HAL_FLASH_Unlock() function
		311	* must be called before.
		312	* Call the @ref HAL_FLASH_Lock() to disable the flash memory access
		313	* (recommended to protect the FLASH memory against possible unwanted operation)
		314	* @param pEraseInit pointer to an FLASH_EraseInitTypeDef structure that
		315	* contains the configuration information for the erasing.
		316	*
		317	* @retval HAL_StatusTypeDef HAL Status
		318	*/
		319	HAL_StatusTypeDef HAL_FLASHEx_Erase_IT(FLASH_EraseInitTypeDef *pEraseInit)
		320	{
		321	HAL_StatusTypeDef status = HAL_OK;
		322
		323	/* Process Locked */
		324	__HAL_LOCK(&pFlash);
		325
		326	/* If procedure already ongoing, reject the next one */
		327	if (pFlash.ProcedureOnGoing != FLASH_PROC_NONE)
		328	{
		329	return HAL_ERROR;
		330	}
		331
		332	/* Check the parameters */
		333	assert_param(IS_FLASH_TYPEERASE(pEraseInit->TypeErase));
		334
		335	/* Enable End of FLASH Operation and Error source interrupts */
		336	__HAL_FLASH_ENABLE_IT(FLASH_IT_EOP \| FLASH_IT_ERR);
		337
		338	#if defined(FLASH_BANK2_END)
		339	/* Enable End of FLASH Operation and Error source interrupts */
		340	__HAL_FLASH_ENABLE_IT(FLASH_IT_EOP_BANK2 \| FLASH_IT_ERR_BANK2);
		341
		342	#endif
		343	if (pEraseInit->TypeErase == FLASH_TYPEERASE_MASSERASE)
		344	{
		345	/Mass erase to be done/
		346	pFlash.ProcedureOnGoing = FLASH_PROC_MASSERASE;
		347	FLASH_MassErase(pEraseInit->Banks);
		348	}
		349	else
		350	{
		351	/* Erase by page to be done*/
		352
		353	/* Check the parameters */
		354	assert_param(IS_FLASH_PROGRAM_ADDRESS(pEraseInit->PageAddress));
		355	assert_param(IS_FLASH_NB_PAGES(pEraseInit->PageAddress, pEraseInit->NbPages));
		356
		357	pFlash.ProcedureOnGoing = FLASH_PROC_PAGEERASE;
		358	pFlash.DataRemaining = pEraseInit->NbPages;
		359	pFlash.Address = pEraseInit->PageAddress;
		360
		361	/Erase 1st page and wait for IT/
		362	FLASH_PageErase(pEraseInit->PageAddress);
		363	}
		364
		365	return status;
		366	}
		367
		368	/**
		369	* @}
		370	*/
		371
		372	/** @defgroup FLASHEx_Exported_Functions_Group2 Option Bytes Programming functions
		373	* @brief Option Bytes Programming functions
		374	*
		375	@verbatim
		376	==============================================================================
		377	##### Option Bytes Programming functions #####
		378	==============================================================================
		379	[..]
		380	This subsection provides a set of functions allowing to control the FLASH
		381	option bytes operations.
		382
		383	@endverbatim
		384	* @{
		385	*/
		386
		387	/**
		388	* @brief Erases the FLASH option bytes.
		389	* @note This functions erases all option bytes except the Read protection (RDP).
		390	* The function @ref HAL_FLASH_Unlock() should be called before to unlock the FLASH interface
		391	* The function @ref HAL_FLASH_OB_Unlock() should be called before to unlock the options bytes
		392	* The function @ref HAL_FLASH_OB_Launch() should be called after to force the reload of the options bytes
		393	* (system reset will occur)
		394	* @retval HAL status
		395	*/
		396
		397	HAL_StatusTypeDef HAL_FLASHEx_OBErase(void)
		398	{
		399	uint8_t rdptmp = OB_RDP_LEVEL_0;
		400	HAL_StatusTypeDef status = HAL_ERROR;
		401
		402	/* Get the actual read protection Option Byte value */
		403	rdptmp = FLASH_OB_GetRDP();
		404
		405	/* Wait for last operation to be completed */
		406	status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);
		407
		408	if(status == HAL_OK)
		409	{
		410	/* Clean the error context */
		411	pFlash.ErrorCode = HAL_FLASH_ERROR_NONE;
		412
		413	/* If the previous operation is completed, proceed to erase the option bytes */
		414	SET_BIT(FLASH->CR, FLASH_CR_OPTER);
		415	SET_BIT(FLASH->CR, FLASH_CR_STRT);
		416
		417	/* Wait for last operation to be completed */
		418	status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);
		419
		420	/* If the erase operation is completed, disable the OPTER Bit */
		421	CLEAR_BIT(FLASH->CR, FLASH_CR_OPTER);
		422
		423	if(status == HAL_OK)
		424	{
		425	/* Restore the last read protection Option Byte value */
		426	status = FLASH_OB_RDP_LevelConfig(rdptmp);
		427	}
		428	}
		429
		430	/* Return the erase status */
		431	return status;
		432	}
		433
		434	/**
		435	* @brief Program option bytes
		436	* @note The function @ref HAL_FLASH_Unlock() should be called before to unlock the FLASH interface
		437	* The function @ref HAL_FLASH_OB_Unlock() should be called before to unlock the options bytes
		438	* The function @ref HAL_FLASH_OB_Launch() should be called after to force the reload of the options bytes
		439	* (system reset will occur)
		440	*
		441	* @param pOBInit pointer to an FLASH_OBInitStruct structure that
		442	* contains the configuration information for the programming.
		443	*
		444	* @retval HAL_StatusTypeDef HAL Status
		445	*/
		446	HAL_StatusTypeDef HAL_FLASHEx_OBProgram(FLASH_OBProgramInitTypeDef *pOBInit)
		447	{
		448	HAL_StatusTypeDef status = HAL_ERROR;
		449
		450	/* Process Locked */
		451	__HAL_LOCK(&pFlash);
		452
		453	/* Check the parameters */
		454	assert_param(IS_OPTIONBYTE(pOBInit->OptionType));
		455
		456	/* Write protection configuration */
		457	if((pOBInit->OptionType & OPTIONBYTE_WRP) == OPTIONBYTE_WRP)
		458	{
		459	assert_param(IS_WRPSTATE(pOBInit->WRPState));
		460	if (pOBInit->WRPState == OB_WRPSTATE_ENABLE)
		461	{
		462	/* Enable of Write protection on the selected page */
		463	status = FLASH_OB_EnableWRP(pOBInit->WRPPage);
		464	}
		465	else
		466	{
		467	/* Disable of Write protection on the selected page */
		468	status = FLASH_OB_DisableWRP(pOBInit->WRPPage);
		469	}
		470	if (status != HAL_OK)
		471	{
		472	/* Process Unlocked */
		473	__HAL_UNLOCK(&pFlash);
		474	return status;
		475	}
		476	}
		477
		478	/* Read protection configuration */
		479	if((pOBInit->OptionType & OPTIONBYTE_RDP) == OPTIONBYTE_RDP)
		480	{
		481	status = FLASH_OB_RDP_LevelConfig(pOBInit->RDPLevel);
		482	if (status != HAL_OK)
		483	{
		484	/* Process Unlocked */
		485	__HAL_UNLOCK(&pFlash);
		486	return status;
		487	}
		488	}
		489
		490	/* USER configuration */
		491	if((pOBInit->OptionType & OPTIONBYTE_USER) == OPTIONBYTE_USER)
		492	{
		493	status = FLASH_OB_UserConfig(pOBInit->USERConfig);
		494	if (status != HAL_OK)
		495	{
		496	/* Process Unlocked */
		497	__HAL_UNLOCK(&pFlash);
		498	return status;
		499	}
		500	}
		501
		502	/* DATA configuration*/
		503	if((pOBInit->OptionType & OPTIONBYTE_DATA) == OPTIONBYTE_DATA)
		504	{
		505	status = FLASH_OB_ProgramData(pOBInit->DATAAddress, pOBInit->DATAData);
		506	if (status != HAL_OK)
		507	{
		508	/* Process Unlocked */
		509	__HAL_UNLOCK(&pFlash);
		510	return status;
		511	}
		512	}
		513
		514	/* Process Unlocked */
		515	__HAL_UNLOCK(&pFlash);
		516
		517	return status;
		518	}
		519
		520	/**
		521	* @brief Get the Option byte configuration
		522	* @param pOBInit pointer to an FLASH_OBInitStruct structure that
		523	* contains the configuration information for the programming.
		524	*
		525	* @retval None
		526	*/
		527	void HAL_FLASHEx_OBGetConfig(FLASH_OBProgramInitTypeDef *pOBInit)
		528	{
		529	pOBInit->OptionType = OPTIONBYTE_WRP \| OPTIONBYTE_RDP \| OPTIONBYTE_USER;
		530
		531	/Get WRP/
		532	pOBInit->WRPPage = FLASH_OB_GetWRP();
		533
		534	/Get RDP Level/
		535	pOBInit->RDPLevel = FLASH_OB_GetRDP();
		536
		537	/Get USER/
		538	pOBInit->USERConfig = FLASH_OB_GetUser();
		539	}
		540
		541	/**
		542	* @brief Get the Option byte user data
		543	* @param DATAAdress Address of the option byte DATA
		544	* This parameter can be one of the following values:
		545	* @arg @ref OB_DATA_ADDRESS_DATA0
		546	* @arg @ref OB_DATA_ADDRESS_DATA1
		547	* @retval Value programmed in USER data
		548	*/
		549	uint32_t HAL_FLASHEx_OBGetUserData(uint32_t DATAAdress)
		550	{
		551	uint32_t value = 0;
		552
		553	if (DATAAdress == OB_DATA_ADDRESS_DATA0)
		554	{
		555	/* Get value programmed in OB USER Data0 */
		556	value = READ_BIT(FLASH->OBR, FLASH_OBR_DATA0) >> FLASH_POSITION_OB_USERDATA0_BIT;
		557	}
		558	else
		559	{
		560	/* Get value programmed in OB USER Data1 */
		561	value = READ_BIT(FLASH->OBR, FLASH_OBR_DATA1) >> FLASH_POSITION_OB_USERDATA1_BIT;
		562	}
		563
		564	return value;
		565	}
		566
		567	/**
		568	* @}
		569	*/
		570
		571	/**
		572	* @}
		573	*/
		574
		575	/** @addtogroup FLASHEx_Private_Functions
		576	* @{
		577	*/
		578
		579	/**
		580	* @brief Full erase of FLASH memory Bank
		581	* @param Banks Banks to be erased
		582	* This parameter can be one of the following values:
		583	* @arg @ref FLASH_BANK_1 Bank1 to be erased
		584	@if STM32F101xG
		585	* @arg @ref FLASH_BANK_2 Bank2 to be erased
		586	* @arg @ref FLASH_BANK_BOTH Bank1 and Bank2 to be erased
		587	@endif
		588	@if STM32F103xG
		589	* @arg @ref FLASH_BANK_2 Bank2 to be erased
		590	* @arg @ref FLASH_BANK_BOTH Bank1 and Bank2 to be erased
		591	@endif
		592	*
		593	* @retval None
		594	*/
		595	static void FLASH_MassErase(uint32_t Banks)
		596	{
		597	/* Check the parameters */
		598	assert_param(IS_FLASH_BANK(Banks));
		599
		600	/* Clean the error context */
		601	pFlash.ErrorCode = HAL_FLASH_ERROR_NONE;
		602
		603	#if defined(FLASH_BANK2_END)
		604	if(Banks == FLASH_BANK_BOTH)
		605	{
		606	/* bank1 & bank2 will be erased*/
		607	SET_BIT(FLASH->CR, FLASH_CR_MER);
		608	SET_BIT(FLASH->CR2, FLASH_CR2_MER);
		609	SET_BIT(FLASH->CR, FLASH_CR_STRT);
		610	SET_BIT(FLASH->CR2, FLASH_CR2_STRT);
		611	}
		612	else if(Banks == FLASH_BANK_2)
		613	{
		614	/Only bank2 will be erased/
		615	SET_BIT(FLASH->CR2, FLASH_CR2_MER);
		616	SET_BIT(FLASH->CR2, FLASH_CR2_STRT);
		617	}
		618	else
		619	{
		620	#endif /* FLASH_BANK2_END */
		621	#if !defined(FLASH_BANK2_END)
		622	/* Prevent unused argument(s) compilation warning */
		623	UNUSED(Banks);
		624	#endif /* FLASH_BANK2_END */
		625	/* Only bank1 will be erased*/
		626	SET_BIT(FLASH->CR, FLASH_CR_MER);
		627	SET_BIT(FLASH->CR, FLASH_CR_STRT);
		628	#if defined(FLASH_BANK2_END)
		629	}
		630	#endif /* FLASH_BANK2_END */
		631	}
		632
		633	/**
		634	* @brief Enable the write protection of the desired pages
		635	* @note An option byte erase is done automatically in this function.
		636	* @note When the memory read protection level is selected (RDP level = 1),
		637	* it is not possible to program or erase the flash page i if
		638	* debug features are connected or boot code is executed in RAM, even if nWRPi = 1
		639	*
		640	* @param WriteProtectPage specifies the page(s) to be write protected.
		641	* The value of this parameter depend on device used within the same series
		642	* @retval HAL status
		643	*/
		644	static HAL_StatusTypeDef FLASH_OB_EnableWRP(uint32_t WriteProtectPage)
		645	{
		646	HAL_StatusTypeDef status = HAL_OK;
		647	uint16_t WRP0_Data = 0xFFFF;
		648	#if defined(FLASH_WRP1_WRP1)
		649	uint16_t WRP1_Data = 0xFFFF;
		650	#endif /* FLASH_WRP1_WRP1 */
		651	#if defined(FLASH_WRP2_WRP2)
		652	uint16_t WRP2_Data = 0xFFFF;
		653	#endif /* FLASH_WRP2_WRP2 */
		654	#if defined(FLASH_WRP3_WRP3)
		655	uint16_t WRP3_Data = 0xFFFF;
		656	#endif /* FLASH_WRP3_WRP3 */
		657
		658	/* Check the parameters */
		659	assert_param(IS_OB_WRP(WriteProtectPage));
		660
		661	/* Get current write protected pages and the new pages to be protected ******/
		662	WriteProtectPage = (uint32_t)(~((~FLASH_OB_GetWRP()) \| WriteProtectPage));
		663
		664	#if defined(OB_WRP_PAGES0TO15MASK)
		665	WRP0_Data = (uint16_t)(WriteProtectPage & OB_WRP_PAGES0TO15MASK);
		666	#elif defined(OB_WRP_PAGES0TO31MASK)
		667	WRP0_Data = (uint16_t)(WriteProtectPage & OB_WRP_PAGES0TO31MASK);
		668	#endif /* OB_WRP_PAGES0TO31MASK */
		669
		670	#if defined(OB_WRP_PAGES16TO31MASK)
		671	WRP1_Data = (uint16_t)((WriteProtectPage & OB_WRP_PAGES16TO31MASK) >> 8U);
		672	#elif defined(OB_WRP_PAGES32TO63MASK)
		673	WRP1_Data = (uint16_t)((WriteProtectPage & OB_WRP_PAGES32TO63MASK) >> 8U);
		674	#endif /* OB_WRP_PAGES32TO63MASK */
		675
		676	#if defined(OB_WRP_PAGES64TO95MASK)
		677	WRP2_Data = (uint16_t)((WriteProtectPage & OB_WRP_PAGES64TO95MASK) >> 16U);
		678	#endif /* OB_WRP_PAGES64TO95MASK */
		679	#if defined(OB_WRP_PAGES32TO47MASK)
		680	WRP2_Data = (uint16_t)((WriteProtectPage & OB_WRP_PAGES32TO47MASK) >> 16U);
		681	#endif /* OB_WRP_PAGES32TO47MASK */
		682
		683	#if defined(OB_WRP_PAGES96TO127MASK)
		684	WRP3_Data = (uint16_t)((WriteProtectPage & OB_WRP_PAGES96TO127MASK) >> 24U);
		685	#elif defined(OB_WRP_PAGES48TO255MASK)
		686	WRP3_Data = (uint16_t)((WriteProtectPage & OB_WRP_PAGES48TO255MASK) >> 24U);
		687	#elif defined(OB_WRP_PAGES48TO511MASK)
		688	WRP3_Data = (uint16_t)((WriteProtectPage & OB_WRP_PAGES48TO511MASK) >> 24U);
		689	#elif defined(OB_WRP_PAGES48TO127MASK)
		690	WRP3_Data = (uint16_t)((WriteProtectPage & OB_WRP_PAGES48TO127MASK) >> 24U);
		691	#endif /* OB_WRP_PAGES96TO127MASK */
		692
		693	/* Wait for last operation to be completed */
		694	status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);
		695
		696	if(status == HAL_OK)
		697	{
		698	/* Clean the error context */
		699	pFlash.ErrorCode = HAL_FLASH_ERROR_NONE;
		700
		701	/* To be able to write again option byte, need to perform a option byte erase */
		702	status = HAL_FLASHEx_OBErase();
		703	if (status == HAL_OK)
		704	{
		705	/* Enable write protection */
		706	SET_BIT(FLASH->CR, FLASH_CR_OPTPG);
		707
		708	#if defined(FLASH_WRP0_WRP0)
		709	if(WRP0_Data != 0xFFU)
		710	{
		711	OB->WRP0 &= WRP0_Data;
		712
		713	/* Wait for last operation to be completed */
		714	status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);
		715	}
		716	#endif /* FLASH_WRP0_WRP0 */
		717
		718	#if defined(FLASH_WRP1_WRP1)
		719	if((status == HAL_OK) && (WRP1_Data != 0xFFU))
		720	{
		721	OB->WRP1 &= WRP1_Data;
		722
		723	/* Wait for last operation to be completed */
		724	status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);
		725	}
		726	#endif /* FLASH_WRP1_WRP1 */
		727
		728	#if defined(FLASH_WRP2_WRP2)
		729	if((status == HAL_OK) && (WRP2_Data != 0xFFU))
		730	{
		731	OB->WRP2 &= WRP2_Data;
		732
		733	/* Wait for last operation to be completed */
		734	status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);
		735	}
		736	#endif /* FLASH_WRP2_WRP2 */
		737
		738	#if defined(FLASH_WRP3_WRP3)
		739	if((status == HAL_OK) && (WRP3_Data != 0xFFU))
		740	{
		741	OB->WRP3 &= WRP3_Data;
		742
		743	/* Wait for last operation to be completed */
		744	status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);
		745	}
		746	#endif /* FLASH_WRP3_WRP3 */
		747
		748	/* if the program operation is completed, disable the OPTPG Bit */
		749	CLEAR_BIT(FLASH->CR, FLASH_CR_OPTPG);
		750	}
		751	}
		752
		753	return status;
		754	}
		755
		756	/**
		757	* @brief Disable the write protection of the desired pages
		758	* @note An option byte erase is done automatically in this function.
		759	* @note When the memory read protection level is selected (RDP level = 1),
		760	* it is not possible to program or erase the flash page i if
		761	* debug features are connected or boot code is executed in RAM, even if nWRPi = 1
		762	*
		763	* @param WriteProtectPage specifies the page(s) to be write unprotected.
		764	* The value of this parameter depend on device used within the same series
		765	* @retval HAL status
		766	*/
		767	static HAL_StatusTypeDef FLASH_OB_DisableWRP(uint32_t WriteProtectPage)
		768	{
		769	HAL_StatusTypeDef status = HAL_OK;
		770	uint16_t WRP0_Data = 0xFFFF;
		771	#if defined(FLASH_WRP1_WRP1)
		772	uint16_t WRP1_Data = 0xFFFF;
		773	#endif /* FLASH_WRP1_WRP1 */
		774	#if defined(FLASH_WRP2_WRP2)
		775	uint16_t WRP2_Data = 0xFFFF;
		776	#endif /* FLASH_WRP2_WRP2 */
		777	#if defined(FLASH_WRP3_WRP3)
		778	uint16_t WRP3_Data = 0xFFFF;
		779	#endif /* FLASH_WRP3_WRP3 */
		780
		781	/* Check the parameters */
		782	assert_param(IS_OB_WRP(WriteProtectPage));
		783
		784	/* Get current write protected pages and the new pages to be unprotected ******/
		785	WriteProtectPage = (FLASH_OB_GetWRP() \| WriteProtectPage);
		786
		787	#if defined(OB_WRP_PAGES0TO15MASK)
		788	WRP0_Data = (uint16_t)(WriteProtectPage & OB_WRP_PAGES0TO15MASK);
		789	#elif defined(OB_WRP_PAGES0TO31MASK)
		790	WRP0_Data = (uint16_t)(WriteProtectPage & OB_WRP_PAGES0TO31MASK);
		791	#endif /* OB_WRP_PAGES0TO31MASK */
		792
		793	#if defined(OB_WRP_PAGES16TO31MASK)
		794	WRP1_Data = (uint16_t)((WriteProtectPage & OB_WRP_PAGES16TO31MASK) >> 8U);
		795	#elif defined(OB_WRP_PAGES32TO63MASK)
		796	WRP1_Data = (uint16_t)((WriteProtectPage & OB_WRP_PAGES32TO63MASK) >> 8U);
		797	#endif /* OB_WRP_PAGES32TO63MASK */
		798
		799	#if defined(OB_WRP_PAGES64TO95MASK)
		800	WRP2_Data = (uint16_t)((WriteProtectPage & OB_WRP_PAGES64TO95MASK) >> 16U);
		801	#endif /* OB_WRP_PAGES64TO95MASK */
		802	#if defined(OB_WRP_PAGES32TO47MASK)
		803	WRP2_Data = (uint16_t)((WriteProtectPage & OB_WRP_PAGES32TO47MASK) >> 16U);
		804	#endif /* OB_WRP_PAGES32TO47MASK */
		805
		806	#if defined(OB_WRP_PAGES96TO127MASK)
		807	WRP3_Data = (uint16_t)((WriteProtectPage & OB_WRP_PAGES96TO127MASK) >> 24U);
		808	#elif defined(OB_WRP_PAGES48TO255MASK)
		809	WRP3_Data = (uint16_t)((WriteProtectPage & OB_WRP_PAGES48TO255MASK) >> 24U);
		810	#elif defined(OB_WRP_PAGES48TO511MASK)
		811	WRP3_Data = (uint16_t)((WriteProtectPage & OB_WRP_PAGES48TO511MASK) >> 24U);
		812	#elif defined(OB_WRP_PAGES48TO127MASK)
		813	WRP3_Data = (uint16_t)((WriteProtectPage & OB_WRP_PAGES48TO127MASK) >> 24U);
		814	#endif /* OB_WRP_PAGES96TO127MASK */
		815
		816
		817	/* Wait for last operation to be completed */
		818	status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);
		819
		820	if(status == HAL_OK)
		821	{
		822	/* Clean the error context */
		823	pFlash.ErrorCode = HAL_FLASH_ERROR_NONE;
		824
		825	/* To be able to write again option byte, need to perform a option byte erase */
		826	status = HAL_FLASHEx_OBErase();
		827	if (status == HAL_OK)
		828	{
		829	SET_BIT(FLASH->CR, FLASH_CR_OPTPG);
		830
		831	#if defined(FLASH_WRP0_WRP0)
		832	if(WRP0_Data != 0xFFU)
		833	{
		834	OB->WRP0 \|= WRP0_Data;
		835
		836	/* Wait for last operation to be completed */
		837	status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);
		838	}
		839	#endif /* FLASH_WRP0_WRP0 */
		840
		841	#if defined(FLASH_WRP1_WRP1)
		842	if((status == HAL_OK) && (WRP1_Data != 0xFFU))
		843	{
		844	OB->WRP1 \|= WRP1_Data;
		845
		846	/* Wait for last operation to be completed */
		847	status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);
		848	}
		849	#endif /* FLASH_WRP1_WRP1 */
		850
		851	#if defined(FLASH_WRP2_WRP2)
		852	if((status == HAL_OK) && (WRP2_Data != 0xFFU))
		853	{
		854	OB->WRP2 \|= WRP2_Data;
		855
		856	/* Wait for last operation to be completed */
		857	status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);
		858	}
		859	#endif /* FLASH_WRP2_WRP2 */
		860
		861	#if defined(FLASH_WRP3_WRP3)
		862	if((status == HAL_OK) && (WRP3_Data != 0xFFU))
		863	{
		864	OB->WRP3 \|= WRP3_Data;
		865
		866	/* Wait for last operation to be completed */
		867	status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);
		868	}
		869	#endif /* FLASH_WRP3_WRP3 */
		870
		871	/* if the program operation is completed, disable the OPTPG Bit */
		872	CLEAR_BIT(FLASH->CR, FLASH_CR_OPTPG);
		873	}
		874	}
		875	return status;
		876	}
		877
		878	/**
		879	* @brief Set the read protection level.
		880	* @param ReadProtectLevel specifies the read protection level.
		881	* This parameter can be one of the following values:
		882	* @arg @ref OB_RDP_LEVEL_0 No protection
		883	* @arg @ref OB_RDP_LEVEL_1 Read protection of the memory
		884	* @retval HAL status
		885	*/
		886	static HAL_StatusTypeDef FLASH_OB_RDP_LevelConfig(uint8_t ReadProtectLevel)
		887	{
		888	HAL_StatusTypeDef status = HAL_OK;
		889
		890	/* Check the parameters */
		891	assert_param(IS_OB_RDP_LEVEL(ReadProtectLevel));
		892
		893	/* Wait for last operation to be completed */
		894	status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);
		895
		896	if(status == HAL_OK)
		897	{
		898	/* Clean the error context */
		899	pFlash.ErrorCode = HAL_FLASH_ERROR_NONE;
		900
		901	/* If the previous operation is completed, proceed to erase the option bytes */
		902	SET_BIT(FLASH->CR, FLASH_CR_OPTER);
		903	SET_BIT(FLASH->CR, FLASH_CR_STRT);
		904
		905	/* Wait for last operation to be completed */
		906	status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);
		907
		908	/* If the erase operation is completed, disable the OPTER Bit */
		909	CLEAR_BIT(FLASH->CR, FLASH_CR_OPTER);
		910
		911	if(status == HAL_OK)
		912	{
		913	/* Enable the Option Bytes Programming operation */
		914	SET_BIT(FLASH->CR, FLASH_CR_OPTPG);
		915
		916	WRITE_REG(OB->RDP, ReadProtectLevel);
		917
		918	/* Wait for last operation to be completed */
		919	status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);
		920
		921	/* if the program operation is completed, disable the OPTPG Bit */
		922	CLEAR_BIT(FLASH->CR, FLASH_CR_OPTPG);
		923	}
		924	}
		925
		926	return status;
		927	}
		928
		929	/**
		930	* @brief Program the FLASH User Option Byte.
		931	* @note Programming of the OB should be performed only after an erase (otherwise PGERR occurs)
		932	* @param UserConfig The FLASH User Option Bytes values FLASH_OBR_IWDG_SW(Bit2),
		933	* FLASH_OBR_nRST_STOP(Bit3),FLASH_OBR_nRST_STDBY(Bit4).
		934	* And BFBF2(Bit5) for STM32F101xG and STM32F103xG .
		935	* @retval HAL status
		936	*/
		937	static HAL_StatusTypeDef FLASH_OB_UserConfig(uint8_t UserConfig)
		938	{
		939	HAL_StatusTypeDef status = HAL_OK;
		940
		941	/* Check the parameters */
		942	assert_param(IS_OB_IWDG_SOURCE((UserConfig&OB_IWDG_SW)));
		943	assert_param(IS_OB_STOP_SOURCE((UserConfig&OB_STOP_NO_RST)));
		944	assert_param(IS_OB_STDBY_SOURCE((UserConfig&OB_STDBY_NO_RST)));
		945	#if defined(FLASH_BANK2_END)
		946	assert_param(IS_OB_BOOT1((UserConfig&OB_BOOT1_SET)));
		947	#endif /* FLASH_BANK2_END */
		948
		949	/* Wait for last operation to be completed */
		950	status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);
		951
		952	if(status == HAL_OK)
		953	{
		954	/* Clean the error context */
		955	pFlash.ErrorCode = HAL_FLASH_ERROR_NONE;
		956
		957	/* Enable the Option Bytes Programming operation */
		958	SET_BIT(FLASH->CR, FLASH_CR_OPTPG);
		959
		960	#if defined(FLASH_BANK2_END)
		961	OB->USER = (UserConfig \| 0xF0U);
		962	#else
		963	OB->USER = (UserConfig \| 0x88U);
		964	#endif /* FLASH_BANK2_END */
		965
		966	/* Wait for last operation to be completed */
		967	status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);
		968
		969	/* if the program operation is completed, disable the OPTPG Bit */
		970	CLEAR_BIT(FLASH->CR, FLASH_CR_OPTPG);
		971	}
		972
		973	return status;
		974	}
		975
		976	/**
		977	* @brief Programs a half word at a specified Option Byte Data address.
		978	* @note The function @ref HAL_FLASH_Unlock() should be called before to unlock the FLASH interface
		979	* The function @ref HAL_FLASH_OB_Unlock() should be called before to unlock the options bytes
		980	* The function @ref HAL_FLASH_OB_Launch() should be called after to force the reload of the options bytes
		981	* (system reset will occur)
		982	* Programming of the OB should be performed only after an erase (otherwise PGERR occurs)
		983	* @param Address specifies the address to be programmed.
		984	* This parameter can be 0x1FFFF804 or 0x1FFFF806.
		985	* @param Data specifies the data to be programmed.
		986	* @retval HAL status
		987	*/
		988	static HAL_StatusTypeDef FLASH_OB_ProgramData(uint32_t Address, uint8_t Data)
		989	{
		990	HAL_StatusTypeDef status = HAL_ERROR;
		991
		992	/* Check the parameters */
		993	assert_param(IS_OB_DATA_ADDRESS(Address));
		994
		995	/* Wait for last operation to be completed */
		996	status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);
		997
		998	if(status == HAL_OK)
		999	{
		1000	/* Clean the error context */
		1001	pFlash.ErrorCode = HAL_FLASH_ERROR_NONE;
		1002
		1003	/* Enables the Option Bytes Programming operation */
		1004	SET_BIT(FLASH->CR, FLASH_CR_OPTPG);
		1005	(__IO uint16_t)Address = Data;
		1006
		1007	/* Wait for last operation to be completed */
		1008	status = FLASH_WaitForLastOperation((uint32_t)FLASH_TIMEOUT_VALUE);
		1009
		1010	/* If the program operation is completed, disable the OPTPG Bit */
		1011	CLEAR_BIT(FLASH->CR, FLASH_CR_OPTPG);
		1012	}
		1013	/* Return the Option Byte Data Program Status */
		1014	return status;
		1015	}
		1016
		1017	/**
		1018	* @brief Return the FLASH Write Protection Option Bytes value.
		1019	* @retval The FLASH Write Protection Option Bytes value
		1020	*/
		1021	static uint32_t FLASH_OB_GetWRP(void)
		1022	{
		1023	/* Return the FLASH write protection Register value */
		1024	return (uint32_t)(READ_REG(FLASH->WRPR));
		1025	}
		1026
		1027	/**
		1028	* @brief Returns the FLASH Read Protection level.
		1029	* @retval FLASH RDP level
		1030	* This parameter can be one of the following values:
		1031	* @arg @ref OB_RDP_LEVEL_0 No protection
		1032	* @arg @ref OB_RDP_LEVEL_1 Read protection of the memory
		1033	*/
		1034	static uint32_t FLASH_OB_GetRDP(void)
		1035	{
		1036	uint32_t readstatus = OB_RDP_LEVEL_0;
		1037	uint32_t tmp_reg = 0U;
		1038
		1039	/* Read RDP level bits */
		1040	tmp_reg = READ_BIT(FLASH->OBR, FLASH_OBR_RDPRT);
		1041
		1042	if (tmp_reg == FLASH_OBR_RDPRT)
		1043	{
		1044	readstatus = OB_RDP_LEVEL_1;
		1045	}
		1046	else
		1047	{
		1048	readstatus = OB_RDP_LEVEL_0;
		1049	}
		1050
		1051	return readstatus;
		1052	}
		1053
		1054	/**
		1055	* @brief Return the FLASH User Option Byte value.
		1056	* @retval The FLASH User Option Bytes values: FLASH_OBR_IWDG_SW(Bit2),
		1057	* FLASH_OBR_nRST_STOP(Bit3),FLASH_OBR_nRST_STDBY(Bit4).
		1058	* And FLASH_OBR_BFB2(Bit5) for STM32F101xG and STM32F103xG .
		1059	*/
		1060	static uint8_t FLASH_OB_GetUser(void)
		1061	{
		1062	/* Return the User Option Byte */
		1063	return (uint8_t)((READ_REG(FLASH->OBR) & FLASH_OBR_USER) >> FLASH_POSITION_IWDGSW_BIT);
		1064	}
		1065
		1066	/**
		1067	* @}
		1068	*/
		1069
		1070	/**
		1071	* @}
		1072	*/
		1073
		1074	/** @addtogroup FLASH
		1075	* @{
		1076	*/
		1077
		1078	/** @addtogroup FLASH_Private_Functions
		1079	* @{
		1080	*/
		1081
		1082	/**
		1083	* @brief Erase the specified FLASH memory page
		1084	* @param PageAddress FLASH page to erase
		1085	* The value of this parameter depend on device used within the same series
		1086	*
		1087	* @retval None
		1088	*/
		1089	void FLASH_PageErase(uint32_t PageAddress)
		1090	{
		1091	/* Clean the error context */
		1092	pFlash.ErrorCode = HAL_FLASH_ERROR_NONE;
		1093
		1094	#if defined(FLASH_BANK2_END)
		1095	if(PageAddress > FLASH_BANK1_END)
		1096	{
		1097	/* Proceed to erase the page */
		1098	SET_BIT(FLASH->CR2, FLASH_CR2_PER);
		1099	WRITE_REG(FLASH->AR2, PageAddress);
		1100	SET_BIT(FLASH->CR2, FLASH_CR2_STRT);
		1101	}
		1102	else
		1103	{
		1104	#endif /* FLASH_BANK2_END */
		1105	/* Proceed to erase the page */
		1106	SET_BIT(FLASH->CR, FLASH_CR_PER);
		1107	WRITE_REG(FLASH->AR, PageAddress);
		1108	SET_BIT(FLASH->CR, FLASH_CR_STRT);
		1109	#if defined(FLASH_BANK2_END)
		1110	}
		1111	#endif /* FLASH_BANK2_END */
		1112	}
		1113
		1114	/**
		1115	* @}
		1116	*/
		1117
		1118	/**
		1119	* @}
		1120	*/
		1121
		1122	#endif /* HAL_FLASH_MODULE_ENABLED */
		1123	/**
		1124	* @}
		1125	*/
		1126
		1127	/********************** (C) COPYRIGHT STMicroelectronics *END OF FILE**/

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(root)/trunk/Drivers/STM32F1xx_HAL_Driver/Src/stm32f1xx_hal_flash_ex.c – Rev 2