WebSVN – dashGPS – Blame – /trunk/Middlewares/ST/STM32_USB_Device_Library/Class/CDC/Src/usbd_cdc.c

Rev	Author	Line No.	Line
16	mjames	1	/**
		2	******************************************************************************
		3	* @file usbd_cdc.c
		4	* @author MCD Application Team
		5	* @brief This file provides the high layer firmware functions to manage the
		6	* following functionalities of the USB CDC Class:
		7	* - Initialization and Configuration of high and low layer
		8	* - Enumeration as CDC Device (and enumeration for each implemented memory interface)
		9	* - OUT/IN data transfer
		10	* - Command IN transfer (class requests management)
		11	* - Error management
		12	*
		13	* @verbatim
		14	*
		15	* ===================================================================
		16	* CDC Class Driver Description
		17	* ===================================================================
		18	* This driver manages the "Universal Serial Bus Class Definitions for Communications Devices
		19	* Revision 1.2 November 16, 2007" and the sub-protocol specification of "Universal Serial Bus
		20	* Communications Class Subclass Specification for PSTN Devices Revision 1.2 February 9, 2007"
		21	* This driver implements the following aspects of the specification:
		22	* - Device descriptor management
		23	* - Configuration descriptor management
		24	* - Enumeration as CDC device with 2 data endpoints (IN and OUT) and 1 command endpoint (IN)
		25	* - Requests management (as described in section 6.2 in specification)
		26	* - Abstract Control Model compliant
		27	* - Union Functional collection (using 1 IN endpoint for control)
		28	* - Data interface class
		29	*
		30	* These aspects may be enriched or modified for a specific user application.
		31	*
		32	* This driver doesn't implement the following aspects of the specification
		33	* (but it is possible to manage these features with some modifications on this driver):
		34	* - Any class-specific aspect relative to communication classes should be managed by user application.
		35	* - All communication classes other than PSTN are not managed
		36	*
		37	* @endverbatim
		38	*
		39	******************************************************************************
		40	* @attention
		41	*
		42	* <h2><center>© Copyright (c) 2015 STMicroelectronics.
		43	* All rights reserved.</center></h2>
		44	*
		45	* This software component is licensed by ST under Ultimate Liberty license
		46	* SLA0044, the "License"; You may not use this file except in compliance with
		47	* the License. You may obtain a copy of the License at:
		48	* www.st.com/SLA0044
		49	*
		50	******************************************************************************
		51	*/
		52
		53	/* BSPDependencies
		54	- "stm32xxxxx_{eval}{discovery}{nucleo_144}.c"
		55	- "stm32xxxxx_{eval}{discovery}_io.c"
		56	EndBSPDependencies */
		57
		58	/* Includes ------------------------------------------------------------------*/
		59	#include "usbd_cdc.h"
		60	#include "usbd_ctlreq.h"
		61
		62
		63	/** @addtogroup STM32_USB_DEVICE_LIBRARY
		64	* @{
		65	*/
		66
		67
		68	/** @defgroup USBD_CDC
		69	* @brief usbd core module
		70	* @{
		71	*/
		72
		73	/** @defgroup USBD_CDC_Private_TypesDefinitions
		74	* @{
		75	*/
		76	/**
		77	* @}
		78	*/
		79
		80
		81	/** @defgroup USBD_CDC_Private_Defines
		82	* @{
		83	*/
		84	/**
		85	* @}
		86	*/
		87
		88
		89	/** @defgroup USBD_CDC_Private_Macros
		90	* @{
		91	*/
		92
		93	/**
		94	* @}
		95	*/
		96
		97
		98	/** @defgroup USBD_CDC_Private_FunctionPrototypes
		99	* @{
		100	*/
		101
		102
		103	static uint8_t USBD_CDC_Init(USBD_HandleTypeDef *pdev,
		104	uint8_t cfgidx);
		105
		106	static uint8_t USBD_CDC_DeInit(USBD_HandleTypeDef *pdev,
		107	uint8_t cfgidx);
		108
		109	static uint8_t USBD_CDC_Setup(USBD_HandleTypeDef *pdev,
		110	USBD_SetupReqTypedef *req);
		111
		112	static uint8_t USBD_CDC_DataIn(USBD_HandleTypeDef *pdev,
		113	uint8_t epnum);
		114
		115	static uint8_t USBD_CDC_DataOut(USBD_HandleTypeDef *pdev,
		116	uint8_t epnum);
		117
		118	static uint8_t USBD_CDC_EP0_RxReady(USBD_HandleTypeDef *pdev);
		119
		120	static uint8_t USBD_CDC_GetFSCfgDesc(uint16_t length);
		121
		122	static uint8_t USBD_CDC_GetHSCfgDesc(uint16_t length);
		123
		124	static uint8_t USBD_CDC_GetOtherSpeedCfgDesc(uint16_t length);
		125
		126	static uint8_t USBD_CDC_GetOtherSpeedCfgDesc(uint16_t length);
		127
		128	uint8_t USBD_CDC_GetDeviceQualifierDescriptor(uint16_t length);
		129
		130	/* USB Standard Device Descriptor */
		131	__ALIGN_BEGIN static uint8_t USBD_CDC_DeviceQualifierDesc[USB_LEN_DEV_QUALIFIER_DESC] __ALIGN_END =
		132	{
		133	USB_LEN_DEV_QUALIFIER_DESC,
		134	USB_DESC_TYPE_DEVICE_QUALIFIER,
		135	0x00,
		136	0x02,
		137	0x00,
		138	0x00,
		139	0x00,
		140	0x40,
		141	0x01,
		142	0x00,
		143	};
		144
		145	/**
		146	* @}
		147	*/
		148
		149	/** @defgroup USBD_CDC_Private_Variables
		150	* @{
		151	*/
		152
		153
		154	/* CDC interface class callbacks structure */
		155	USBD_ClassTypeDef USBD_CDC =
		156	{
		157	USBD_CDC_Init,
		158	USBD_CDC_DeInit,
		159	USBD_CDC_Setup,
		160	NULL, /* EP0_TxSent, */
		161	USBD_CDC_EP0_RxReady,
		162	USBD_CDC_DataIn,
		163	USBD_CDC_DataOut,
		164	NULL,
		165	NULL,
		166	NULL,
		167	USBD_CDC_GetHSCfgDesc,
		168	USBD_CDC_GetFSCfgDesc,
		169	USBD_CDC_GetOtherSpeedCfgDesc,
		170	USBD_CDC_GetDeviceQualifierDescriptor,
		171	};
		172
		173	/* USB CDC device Configuration Descriptor */
		174	__ALIGN_BEGIN uint8_t USBD_CDC_CfgHSDesc[USB_CDC_CONFIG_DESC_SIZ] __ALIGN_END =
		175	{
		176	/Configuration Descriptor/
		177	0x09, /* bLength: Configuration Descriptor size */
		178	USB_DESC_TYPE_CONFIGURATION, /* bDescriptorType: Configuration */
		179	USB_CDC_CONFIG_DESC_SIZ, /* wTotalLength:no of returned bytes */
		180	0x00,
		181	0x02, /* bNumInterfaces: 2 interface */
		182	0x01, /* bConfigurationValue: Configuration value */
		183	0x00, /* iConfiguration: Index of string descriptor describing the configuration */
		184	0xC0, /* bmAttributes: self powered */
		185	0x32, /* MaxPower 0 mA */
		186
		187	/---------------------------------------------------------------------------/
		188
		189	/Interface Descriptor /
		190	0x09, /* bLength: Interface Descriptor size */
		191	USB_DESC_TYPE_INTERFACE, /* bDescriptorType: Interface */
		192	/* Interface descriptor type */
		193	0x00, /* bInterfaceNumber: Number of Interface */
		194	0x00, /* bAlternateSetting: Alternate setting */
		195	0x01, /* bNumEndpoints: One endpoints used */
		196	0x02, /* bInterfaceClass: Communication Interface Class */
		197	0x02, /* bInterfaceSubClass: Abstract Control Model */
		198	0x01, /* bInterfaceProtocol: Common AT commands */
		199	0x00, /* iInterface: */
		200
		201	/Header Functional Descriptor/
		202	0x05, /* bLength: Endpoint Descriptor size */
		203	0x24, /* bDescriptorType: CS_INTERFACE */
		204	0x00, /* bDescriptorSubtype: Header Func Desc */
		205	0x10, /* bcdCDC: spec release number */
		206	0x01,
		207
		208	/Call Management Functional Descriptor/
		209	0x05, /* bFunctionLength */
		210	0x24, /* bDescriptorType: CS_INTERFACE */
		211	0x01, /* bDescriptorSubtype: Call Management Func Desc */
		212	0x00, /* bmCapabilities: D0+D1 */
		213	0x01, /* bDataInterface: 1 */
		214
		215	/ACM Functional Descriptor/
		216	0x04, /* bFunctionLength */
		217	0x24, /* bDescriptorType: CS_INTERFACE */
		218	0x02, /* bDescriptorSubtype: Abstract Control Management desc */
		219	0x02, /* bmCapabilities */
		220
		221	/Union Functional Descriptor/
		222	0x05, /* bFunctionLength */
		223	0x24, /* bDescriptorType: CS_INTERFACE */
		224	0x06, /* bDescriptorSubtype: Union func desc */
		225	0x00, /* bMasterInterface: Communication class interface */
		226	0x01, /* bSlaveInterface0: Data Class Interface */
		227
		228	/Endpoint 2 Descriptor/
		229	0x07, /* bLength: Endpoint Descriptor size */
		230	USB_DESC_TYPE_ENDPOINT, /* bDescriptorType: Endpoint */
		231	CDC_CMD_EP, /* bEndpointAddress */
		232	0x03, /* bmAttributes: Interrupt */
		233	LOBYTE(CDC_CMD_PACKET_SIZE), /* wMaxPacketSize: */
		234	HIBYTE(CDC_CMD_PACKET_SIZE),
		235	CDC_HS_BINTERVAL, /* bInterval: */
		236	/---------------------------------------------------------------------------/
		237
		238	/Data class interface descriptor/
		239	0x09, /* bLength: Endpoint Descriptor size */
		240	USB_DESC_TYPE_INTERFACE, /* bDescriptorType: */
		241	0x01, /* bInterfaceNumber: Number of Interface */
		242	0x00, /* bAlternateSetting: Alternate setting */
		243	0x02, /* bNumEndpoints: Two endpoints used */
		244	0x0A, /* bInterfaceClass: CDC */
		245	0x00, /* bInterfaceSubClass: */
		246	0x00, /* bInterfaceProtocol: */
		247	0x00, /* iInterface: */
		248
		249	/Endpoint OUT Descriptor/
		250	0x07, /* bLength: Endpoint Descriptor size */
		251	USB_DESC_TYPE_ENDPOINT, /* bDescriptorType: Endpoint */
		252	CDC_OUT_EP, /* bEndpointAddress */
		253	0x02, /* bmAttributes: Bulk */
		254	LOBYTE(CDC_DATA_HS_MAX_PACKET_SIZE), /* wMaxPacketSize: */
		255	HIBYTE(CDC_DATA_HS_MAX_PACKET_SIZE),
		256	0x00, /* bInterval: ignore for Bulk transfer */
		257
		258	/Endpoint IN Descriptor/
		259	0x07, /* bLength: Endpoint Descriptor size */
		260	USB_DESC_TYPE_ENDPOINT, /* bDescriptorType: Endpoint */
		261	CDC_IN_EP, /* bEndpointAddress */
		262	0x02, /* bmAttributes: Bulk */
		263	LOBYTE(CDC_DATA_HS_MAX_PACKET_SIZE), /* wMaxPacketSize: */
		264	HIBYTE(CDC_DATA_HS_MAX_PACKET_SIZE),
		265	0x00 /* bInterval: ignore for Bulk transfer */
		266	} ;
		267
		268
		269	/* USB CDC device Configuration Descriptor */
		270	__ALIGN_BEGIN uint8_t USBD_CDC_CfgFSDesc[USB_CDC_CONFIG_DESC_SIZ] __ALIGN_END =
		271	{
		272	/Configuration Descriptor/
		273	0x09, /* bLength: Configuration Descriptor size */
		274	USB_DESC_TYPE_CONFIGURATION, /* bDescriptorType: Configuration */
		275	USB_CDC_CONFIG_DESC_SIZ, /* wTotalLength:no of returned bytes */
		276	0x00,
		277	0x02, /* bNumInterfaces: 2 interface */
		278	0x01, /* bConfigurationValue: Configuration value */
		279	0x00, /* iConfiguration: Index of string descriptor describing the configuration */
		280	0xC0, /* bmAttributes: self powered */
		281	0x32, /* MaxPower 0 mA */
		282
		283	/---------------------------------------------------------------------------/
		284
		285	/Interface Descriptor /
		286	0x09, /* bLength: Interface Descriptor size */
		287	USB_DESC_TYPE_INTERFACE, /* bDescriptorType: Interface */
		288	/* Interface descriptor type */
		289	0x00, /* bInterfaceNumber: Number of Interface */
		290	0x00, /* bAlternateSetting: Alternate setting */
		291	0x01, /* bNumEndpoints: One endpoints used */
		292	0x02, /* bInterfaceClass: Communication Interface Class */
		293	0x02, /* bInterfaceSubClass: Abstract Control Model */
		294	0x01, /* bInterfaceProtocol: Common AT commands */
		295	0x00, /* iInterface: */
		296
		297	/Header Functional Descriptor/
		298	0x05, /* bLength: Endpoint Descriptor size */
		299	0x24, /* bDescriptorType: CS_INTERFACE */
		300	0x00, /* bDescriptorSubtype: Header Func Desc */
		301	0x10, /* bcdCDC: spec release number */
		302	0x01,
		303
		304	/Call Management Functional Descriptor/
		305	0x05, /* bFunctionLength */
		306	0x24, /* bDescriptorType: CS_INTERFACE */
		307	0x01, /* bDescriptorSubtype: Call Management Func Desc */
		308	0x00, /* bmCapabilities: D0+D1 */
		309	0x01, /* bDataInterface: 1 */
		310
		311	/ACM Functional Descriptor/
		312	0x04, /* bFunctionLength */
		313	0x24, /* bDescriptorType: CS_INTERFACE */
		314	0x02, /* bDescriptorSubtype: Abstract Control Management desc */
		315	0x02, /* bmCapabilities */
		316
		317	/Union Functional Descriptor/
		318	0x05, /* bFunctionLength */
		319	0x24, /* bDescriptorType: CS_INTERFACE */
		320	0x06, /* bDescriptorSubtype: Union func desc */
		321	0x00, /* bMasterInterface: Communication class interface */
		322	0x01, /* bSlaveInterface0: Data Class Interface */
		323
		324	/Endpoint 2 Descriptor/
		325	0x07, /* bLength: Endpoint Descriptor size */
		326	USB_DESC_TYPE_ENDPOINT, /* bDescriptorType: Endpoint */
		327	CDC_CMD_EP, /* bEndpointAddress */
		328	0x03, /* bmAttributes: Interrupt */
		329	LOBYTE(CDC_CMD_PACKET_SIZE), /* wMaxPacketSize: */
		330	HIBYTE(CDC_CMD_PACKET_SIZE),
		331	CDC_FS_BINTERVAL, /* bInterval: */
		332	/---------------------------------------------------------------------------/
		333
		334	/Data class interface descriptor/
		335	0x09, /* bLength: Endpoint Descriptor size */
		336	USB_DESC_TYPE_INTERFACE, /* bDescriptorType: */
		337	0x01, /* bInterfaceNumber: Number of Interface */
		338	0x00, /* bAlternateSetting: Alternate setting */
		339	0x02, /* bNumEndpoints: Two endpoints used */
		340	0x0A, /* bInterfaceClass: CDC */
		341	0x00, /* bInterfaceSubClass: */
		342	0x00, /* bInterfaceProtocol: */
		343	0x00, /* iInterface: */
		344
		345	/Endpoint OUT Descriptor/
		346	0x07, /* bLength: Endpoint Descriptor size */
		347	USB_DESC_TYPE_ENDPOINT, /* bDescriptorType: Endpoint */
		348	CDC_OUT_EP, /* bEndpointAddress */
		349	0x02, /* bmAttributes: Bulk */
		350	LOBYTE(CDC_DATA_FS_MAX_PACKET_SIZE), /* wMaxPacketSize: */
		351	HIBYTE(CDC_DATA_FS_MAX_PACKET_SIZE),
		352	0x00, /* bInterval: ignore for Bulk transfer */
		353
		354	/Endpoint IN Descriptor/
		355	0x07, /* bLength: Endpoint Descriptor size */
		356	USB_DESC_TYPE_ENDPOINT, /* bDescriptorType: Endpoint */
		357	CDC_IN_EP, /* bEndpointAddress */
		358	0x02, /* bmAttributes: Bulk */
		359	LOBYTE(CDC_DATA_FS_MAX_PACKET_SIZE), /* wMaxPacketSize: */
		360	HIBYTE(CDC_DATA_FS_MAX_PACKET_SIZE),
		361	0x00 /* bInterval: ignore for Bulk transfer */
		362	} ;
		363
		364	__ALIGN_BEGIN uint8_t USBD_CDC_OtherSpeedCfgDesc[USB_CDC_CONFIG_DESC_SIZ] __ALIGN_END =
		365	{
		366	0x09, /* bLength: Configuation Descriptor size */
		367	USB_DESC_TYPE_OTHER_SPEED_CONFIGURATION,
		368	USB_CDC_CONFIG_DESC_SIZ,
		369	0x00,
		370	0x02, /* bNumInterfaces: 2 interfaces */
		371	0x01, /* bConfigurationValue: */
		372	0x04, /* iConfiguration: */
		373	0xC0, /* bmAttributes: */
		374	0x32, /* MaxPower 100 mA */
		375
		376	/Interface Descriptor /
		377	0x09, /* bLength: Interface Descriptor size */
		378	USB_DESC_TYPE_INTERFACE, /* bDescriptorType: Interface */
		379	/* Interface descriptor type */
		380	0x00, /* bInterfaceNumber: Number of Interface */
		381	0x00, /* bAlternateSetting: Alternate setting */
		382	0x01, /* bNumEndpoints: One endpoints used */
		383	0x02, /* bInterfaceClass: Communication Interface Class */
		384	0x02, /* bInterfaceSubClass: Abstract Control Model */
		385	0x01, /* bInterfaceProtocol: Common AT commands */
		386	0x00, /* iInterface: */
		387
		388	/Header Functional Descriptor/
		389	0x05, /* bLength: Endpoint Descriptor size */
		390	0x24, /* bDescriptorType: CS_INTERFACE */
		391	0x00, /* bDescriptorSubtype: Header Func Desc */
		392	0x10, /* bcdCDC: spec release number */
		393	0x01,
		394
		395	/Call Management Functional Descriptor/
		396	0x05, /* bFunctionLength */
		397	0x24, /* bDescriptorType: CS_INTERFACE */
		398	0x01, /* bDescriptorSubtype: Call Management Func Desc */
		399	0x00, /* bmCapabilities: D0+D1 */
		400	0x01, /* bDataInterface: 1 */
		401
		402	/ACM Functional Descriptor/
		403	0x04, /* bFunctionLength */
		404	0x24, /* bDescriptorType: CS_INTERFACE */
		405	0x02, /* bDescriptorSubtype: Abstract Control Management desc */
		406	0x02, /* bmCapabilities */
		407
		408	/Union Functional Descriptor/
		409	0x05, /* bFunctionLength */
		410	0x24, /* bDescriptorType: CS_INTERFACE */
		411	0x06, /* bDescriptorSubtype: Union func desc */
		412	0x00, /* bMasterInterface: Communication class interface */
		413	0x01, /* bSlaveInterface0: Data Class Interface */
		414
		415	/Endpoint 2 Descriptor/
		416	0x07, /* bLength: Endpoint Descriptor size */
		417	USB_DESC_TYPE_ENDPOINT, /* bDescriptorType: Endpoint */
		418	CDC_CMD_EP, /* bEndpointAddress */
		419	0x03, /* bmAttributes: Interrupt */
		420	LOBYTE(CDC_CMD_PACKET_SIZE), /* wMaxPacketSize: */
		421	HIBYTE(CDC_CMD_PACKET_SIZE),
		422	CDC_FS_BINTERVAL, /* bInterval: */
		423
		424	/---------------------------------------------------------------------------/
		425
		426	/Data class interface descriptor/
		427	0x09, /* bLength: Endpoint Descriptor size */
		428	USB_DESC_TYPE_INTERFACE, /* bDescriptorType: */
		429	0x01, /* bInterfaceNumber: Number of Interface */
		430	0x00, /* bAlternateSetting: Alternate setting */
		431	0x02, /* bNumEndpoints: Two endpoints used */
		432	0x0A, /* bInterfaceClass: CDC */
		433	0x00, /* bInterfaceSubClass: */
		434	0x00, /* bInterfaceProtocol: */
		435	0x00, /* iInterface: */
		436
		437	/Endpoint OUT Descriptor/
		438	0x07, /* bLength: Endpoint Descriptor size */
		439	USB_DESC_TYPE_ENDPOINT, /* bDescriptorType: Endpoint */
		440	CDC_OUT_EP, /* bEndpointAddress */
		441	0x02, /* bmAttributes: Bulk */
		442	0x40, /* wMaxPacketSize: */
		443	0x00,
		444	0x00, /* bInterval: ignore for Bulk transfer */
		445
		446	/Endpoint IN Descriptor/
		447	0x07, /* bLength: Endpoint Descriptor size */
		448	USB_DESC_TYPE_ENDPOINT, /* bDescriptorType: Endpoint */
		449	CDC_IN_EP, /* bEndpointAddress */
		450	0x02, /* bmAttributes: Bulk */
		451	0x40, /* wMaxPacketSize: */
		452	0x00,
		453	0x00 /* bInterval */
		454	};
		455
		456	/**
		457	* @}
		458	*/
		459
		460	/** @defgroup USBD_CDC_Private_Functions
		461	* @{
		462	*/
		463
		464	/**
		465	* @brief USBD_CDC_Init
		466	* Initialize the CDC interface
		467	* @param pdev: device instance
		468	* @param cfgidx: Configuration index
		469	* @retval status
		470	*/
		471	static uint8_t USBD_CDC_Init(USBD_HandleTypeDef *pdev, uint8_t cfgidx)
		472	{
		473	uint8_t ret = 0U;
		474	USBD_CDC_HandleTypeDef *hcdc;
		475
		476	if (pdev->dev_speed == USBD_SPEED_HIGH)
		477	{
		478	/* Open EP IN */
		479	USBD_LL_OpenEP(pdev, CDC_IN_EP, USBD_EP_TYPE_BULK,
		480	CDC_DATA_HS_IN_PACKET_SIZE);
		481
		482	pdev->ep_in[CDC_IN_EP & 0xFU].is_used = 1U;
		483
		484	/* Open EP OUT */
		485	USBD_LL_OpenEP(pdev, CDC_OUT_EP, USBD_EP_TYPE_BULK,
		486	CDC_DATA_HS_OUT_PACKET_SIZE);
		487
		488	pdev->ep_out[CDC_OUT_EP & 0xFU].is_used = 1U;
		489
		490	}
		491	else
		492	{
		493	/* Open EP IN */
		494	USBD_LL_OpenEP(pdev, CDC_IN_EP, USBD_EP_TYPE_BULK,
		495	CDC_DATA_FS_IN_PACKET_SIZE);
		496
		497	pdev->ep_in[CDC_IN_EP & 0xFU].is_used = 1U;
		498
		499	/* Open EP OUT */
		500	USBD_LL_OpenEP(pdev, CDC_OUT_EP, USBD_EP_TYPE_BULK,
		501	CDC_DATA_FS_OUT_PACKET_SIZE);
		502
		503	pdev->ep_out[CDC_OUT_EP & 0xFU].is_used = 1U;
		504	}
		505	/* Open Command IN EP */
		506	USBD_LL_OpenEP(pdev, CDC_CMD_EP, USBD_EP_TYPE_INTR, CDC_CMD_PACKET_SIZE);
		507	pdev->ep_in[CDC_CMD_EP & 0xFU].is_used = 1U;
		508
		509	pdev->pClassData = USBD_malloc(sizeof(USBD_CDC_HandleTypeDef));
		510
		511	if (pdev->pClassData == NULL)
		512	{
		513	ret = 1U;
		514	}
		515	else
		516	{
		517	hcdc = (USBD_CDC_HandleTypeDef *) pdev->pClassData;
		518
		519	/* Init physical Interface components */
		520	((USBD_CDC_ItfTypeDef *)pdev->pUserData)->Init();
		521
		522	/* Init Xfer states */
		523	hcdc->TxState = 0U;
		524	hcdc->RxState = 0U;
		525
		526	if (pdev->dev_speed == USBD_SPEED_HIGH)
		527	{
		528	/* Prepare Out endpoint to receive next packet */
		529	USBD_LL_PrepareReceive(pdev, CDC_OUT_EP, hcdc->RxBuffer,
		530	CDC_DATA_HS_OUT_PACKET_SIZE);
		531	}
		532	else
		533	{
		534	/* Prepare Out endpoint to receive next packet */
		535	USBD_LL_PrepareReceive(pdev, CDC_OUT_EP, hcdc->RxBuffer,
		536	CDC_DATA_FS_OUT_PACKET_SIZE);
		537	}
		538	}
		539	return ret;
		540	}
		541
		542	/**
		543	* @brief USBD_CDC_Init
		544	* DeInitialize the CDC layer
		545	* @param pdev: device instance
		546	* @param cfgidx: Configuration index
		547	* @retval status
		548	*/
		549	static uint8_t USBD_CDC_DeInit(USBD_HandleTypeDef *pdev, uint8_t cfgidx)
		550	{
		551	uint8_t ret = 0U;
		552
		553	/* Close EP IN */
		554	USBD_LL_CloseEP(pdev, CDC_IN_EP);
		555	pdev->ep_in[CDC_IN_EP & 0xFU].is_used = 0U;
		556
		557	/* Close EP OUT */
		558	USBD_LL_CloseEP(pdev, CDC_OUT_EP);
		559	pdev->ep_out[CDC_OUT_EP & 0xFU].is_used = 0U;
		560
		561	/* Close Command IN EP */
		562	USBD_LL_CloseEP(pdev, CDC_CMD_EP);
		563	pdev->ep_in[CDC_CMD_EP & 0xFU].is_used = 0U;
		564
		565	/* DeInit physical Interface components */
		566	if (pdev->pClassData != NULL)
		567	{
		568	((USBD_CDC_ItfTypeDef *)pdev->pUserData)->DeInit();
		569	USBD_free(pdev->pClassData);
		570	pdev->pClassData = NULL;
		571	}
		572
		573	return ret;
		574	}
		575
		576	/**
		577	* @brief USBD_CDC_Setup
		578	* Handle the CDC specific requests
		579	* @param pdev: instance
		580	* @param req: usb requests
		581	* @retval status
		582	*/
		583	static uint8_t USBD_CDC_Setup(USBD_HandleTypeDef *pdev,
		584	USBD_SetupReqTypedef *req)
		585	{
		586	USBD_CDC_HandleTypeDef hcdc = (USBD_CDC_HandleTypeDef ) pdev->pClassData;
		587	uint8_t ifalt = 0U;
		588	uint16_t status_info = 0U;
		589	uint8_t ret = USBD_OK;
		590
		591	switch (req->bmRequest & USB_REQ_TYPE_MASK)
		592	{
		593	case USB_REQ_TYPE_CLASS :
		594	if (req->wLength)
		595	{
		596	if (req->bmRequest & 0x80U)
		597	{
		598	((USBD_CDC_ItfTypeDef *)pdev->pUserData)->Control(req->bRequest,
		599	(uint8_t )(void )hcdc->data,
		600	req->wLength);
		601
		602	USBD_CtlSendData(pdev, (uint8_t )(void )hcdc->data, req->wLength);
		603	}
		604	else
		605	{
		606	hcdc->CmdOpCode = req->bRequest;
		607	hcdc->CmdLength = (uint8_t)req->wLength;
		608
		609	USBD_CtlPrepareRx(pdev, (uint8_t )(void )hcdc->data, req->wLength);
		610	}
		611	}
		612	else
		613	{
		614	((USBD_CDC_ItfTypeDef *)pdev->pUserData)->Control(req->bRequest,
		615	(uint8_t )(void )req, 0U);
		616	}
		617	break;
		618
		619	case USB_REQ_TYPE_STANDARD:
		620	switch (req->bRequest)
		621	{
		622	case USB_REQ_GET_STATUS:
		623	if (pdev->dev_state == USBD_STATE_CONFIGURED)
		624	{
		625	USBD_CtlSendData(pdev, (uint8_t )(void )&status_info, 2U);
		626	}
		627	else
		628	{
		629	USBD_CtlError(pdev, req);
		630	ret = USBD_FAIL;
		631	}
		632	break;
		633
		634	case USB_REQ_GET_INTERFACE:
		635	if (pdev->dev_state == USBD_STATE_CONFIGURED)
		636	{
		637	USBD_CtlSendData(pdev, &ifalt, 1U);
		638	}
		639	else
		640	{
		641	USBD_CtlError(pdev, req);
		642	ret = USBD_FAIL;
		643	}
		644	break;
		645
		646	case USB_REQ_SET_INTERFACE:
		647	if (pdev->dev_state != USBD_STATE_CONFIGURED)
		648	{
		649	USBD_CtlError(pdev, req);
		650	ret = USBD_FAIL;
		651	}
		652	break;
		653
		654	default:
		655	USBD_CtlError(pdev, req);
		656	ret = USBD_FAIL;
		657	break;
		658	}
		659	break;
		660
		661	default:
		662	USBD_CtlError(pdev, req);
		663	ret = USBD_FAIL;
		664	break;
		665	}
		666
		667	return ret;
		668	}
		669
		670	/**
		671	* @brief USBD_CDC_DataIn
		672	* Data sent on non-control IN endpoint
		673	* @param pdev: device instance
		674	* @param epnum: endpoint number
		675	* @retval status
		676	*/
		677	static uint8_t USBD_CDC_DataIn(USBD_HandleTypeDef *pdev, uint8_t epnum)
		678	{
		679	USBD_CDC_HandleTypeDef hcdc = (USBD_CDC_HandleTypeDef )pdev->pClassData;
		680	PCD_HandleTypeDef *hpcd = pdev->pData;
		681
		682	if (pdev->pClassData != NULL)
		683	{
		684	if ((pdev->ep_in[epnum].total_length > 0U) && ((pdev->ep_in[epnum].total_length % hpcd->IN_ep[epnum].maxpacket) == 0U))
		685	{
		686	/* Update the packet total length */
		687	pdev->ep_in[epnum].total_length = 0U;
		688
		689	/* Send ZLP */
		690	USBD_LL_Transmit(pdev, epnum, NULL, 0U);
		691	}
		692	else
		693	{
		694	hcdc->TxState = 0U;
		695	}
		696	return USBD_OK;
		697	}
		698	else
		699	{
		700	return USBD_FAIL;
		701	}
		702	}
		703
		704	/**
		705	* @brief USBD_CDC_DataOut
		706	* Data received on non-control Out endpoint
		707	* @param pdev: device instance
		708	* @param epnum: endpoint number
		709	* @retval status
		710	*/
		711	static uint8_t USBD_CDC_DataOut(USBD_HandleTypeDef *pdev, uint8_t epnum)
		712	{
		713	USBD_CDC_HandleTypeDef hcdc = (USBD_CDC_HandleTypeDef ) pdev->pClassData;
		714
		715	/* Get the received data length */
		716	hcdc->RxLength = USBD_LL_GetRxDataSize(pdev, epnum);
		717
		718	/* USB data will be immediately processed, this allow next USB traffic being
		719	NAKed till the end of the application Xfer */
		720	if (pdev->pClassData != NULL)
		721	{
		722	((USBD_CDC_ItfTypeDef *)pdev->pUserData)->Receive(hcdc->RxBuffer, &hcdc->RxLength);
		723
		724	return USBD_OK;
		725	}
		726	else
		727	{
		728	return USBD_FAIL;
		729	}
		730	}
		731
		732	/**
		733	* @brief USBD_CDC_EP0_RxReady
		734	* Handle EP0 Rx Ready event
		735	* @param pdev: device instance
		736	* @retval status
		737	*/
		738	static uint8_t USBD_CDC_EP0_RxReady(USBD_HandleTypeDef *pdev)
		739	{
		740	USBD_CDC_HandleTypeDef hcdc = (USBD_CDC_HandleTypeDef ) pdev->pClassData;
		741
		742	if ((pdev->pUserData != NULL) && (hcdc->CmdOpCode != 0xFFU))
		743	{
		744	((USBD_CDC_ItfTypeDef *)pdev->pUserData)->Control(hcdc->CmdOpCode,
		745	(uint8_t )(void )hcdc->data,
		746	(uint16_t)hcdc->CmdLength);
		747	hcdc->CmdOpCode = 0xFFU;
		748
		749	}
		750	return USBD_OK;
		751	}
		752
		753	/**
		754	* @brief USBD_CDC_GetFSCfgDesc
		755	* Return configuration descriptor
		756	* @param speed : current device speed
		757	* @param length : pointer data length
		758	* @retval pointer to descriptor buffer
		759	*/
		760	static uint8_t USBD_CDC_GetFSCfgDesc(uint16_t length)
		761	{
		762	*length = sizeof(USBD_CDC_CfgFSDesc);
		763	return USBD_CDC_CfgFSDesc;
		764	}
		765
		766	/**
		767	* @brief USBD_CDC_GetHSCfgDesc
		768	* Return configuration descriptor
		769	* @param speed : current device speed
		770	* @param length : pointer data length
		771	* @retval pointer to descriptor buffer
		772	*/
		773	static uint8_t USBD_CDC_GetHSCfgDesc(uint16_t length)
		774	{
		775	*length = sizeof(USBD_CDC_CfgHSDesc);
		776	return USBD_CDC_CfgHSDesc;
		777	}
		778
		779	/**
		780	* @brief USBD_CDC_GetCfgDesc
		781	* Return configuration descriptor
		782	* @param speed : current device speed
		783	* @param length : pointer data length
		784	* @retval pointer to descriptor buffer
		785	*/
		786	static uint8_t USBD_CDC_GetOtherSpeedCfgDesc(uint16_t length)
		787	{
		788	*length = sizeof(USBD_CDC_OtherSpeedCfgDesc);
		789	return USBD_CDC_OtherSpeedCfgDesc;
		790	}
		791
		792	/**
		793	* @brief DeviceQualifierDescriptor
		794	* return Device Qualifier descriptor
		795	* @param length : pointer data length
		796	* @retval pointer to descriptor buffer
		797	*/
		798	uint8_t USBD_CDC_GetDeviceQualifierDescriptor(uint16_t length)
		799	{
		800	*length = sizeof(USBD_CDC_DeviceQualifierDesc);
		801	return USBD_CDC_DeviceQualifierDesc;
		802	}
		803
		804	/**
		805	* @brief USBD_CDC_RegisterInterface
		806	* @param pdev: device instance
		807	* @param fops: CD Interface callback
		808	* @retval status
		809	*/
		810	uint8_t USBD_CDC_RegisterInterface(USBD_HandleTypeDef *pdev,
		811	USBD_CDC_ItfTypeDef *fops)
		812	{
		813	uint8_t ret = USBD_FAIL;
		814
		815	if (fops != NULL)
		816	{
		817	pdev->pUserData = fops;
		818	ret = USBD_OK;
		819	}
		820
		821	return ret;
		822	}
		823
		824	/**
		825	* @brief USBD_CDC_SetTxBuffer
		826	* @param pdev: device instance
		827	* @param pbuff: Tx Buffer
		828	* @retval status
		829	*/
		830	uint8_t USBD_CDC_SetTxBuffer(USBD_HandleTypeDef *pdev,
		831	uint8_t *pbuff,
		832	uint16_t length)
		833	{
		834	USBD_CDC_HandleTypeDef hcdc = (USBD_CDC_HandleTypeDef ) pdev->pClassData;
		835
		836	hcdc->TxBuffer = pbuff;
		837	hcdc->TxLength = length;
		838
		839	return USBD_OK;
		840	}
		841
		842
		843	/**
		844	* @brief USBD_CDC_SetRxBuffer
		845	* @param pdev: device instance
		846	* @param pbuff: Rx Buffer
		847	* @retval status
		848	*/
		849	uint8_t USBD_CDC_SetRxBuffer(USBD_HandleTypeDef *pdev,
		850	uint8_t *pbuff)
		851	{
		852	USBD_CDC_HandleTypeDef hcdc = (USBD_CDC_HandleTypeDef ) pdev->pClassData;
		853
		854	hcdc->RxBuffer = pbuff;
		855
		856	return USBD_OK;
		857	}
		858
		859	/**
		860	* @brief USBD_CDC_TransmitPacket
		861	* Transmit packet on IN endpoint
		862	* @param pdev: device instance
		863	* @retval status
		864	*/
		865	uint8_t USBD_CDC_TransmitPacket(USBD_HandleTypeDef *pdev)
		866	{
		867	USBD_CDC_HandleTypeDef hcdc = (USBD_CDC_HandleTypeDef ) pdev->pClassData;
		868
		869	if (pdev->pClassData != NULL)
		870	{
		871	if (hcdc->TxState == 0U)
		872	{
		873	/* Tx Transfer in progress */
		874	hcdc->TxState = 1U;
		875
		876	/* Update the packet total length */
		877	pdev->ep_in[CDC_IN_EP & 0xFU].total_length = hcdc->TxLength;
		878
		879	/* Transmit next packet */
		880	USBD_LL_Transmit(pdev, CDC_IN_EP, hcdc->TxBuffer,
		881	(uint16_t)hcdc->TxLength);
		882
		883	return USBD_OK;
		884	}
		885	else
		886	{
		887	return USBD_BUSY;
		888	}
		889	}
		890	else
		891	{
		892	return USBD_FAIL;
		893	}
		894	}
		895
		896
		897	/**
		898	* @brief USBD_CDC_ReceivePacket
		899	* prepare OUT Endpoint for reception
		900	* @param pdev: device instance
		901	* @retval status
		902	*/
		903	uint8_t USBD_CDC_ReceivePacket(USBD_HandleTypeDef *pdev)
		904	{
		905	USBD_CDC_HandleTypeDef hcdc = (USBD_CDC_HandleTypeDef ) pdev->pClassData;
		906
		907	/* Suspend or Resume USB Out process */
		908	if (pdev->pClassData != NULL)
		909	{
		910	if (pdev->dev_speed == USBD_SPEED_HIGH)
		911	{
		912	/* Prepare Out endpoint to receive next packet */
		913	USBD_LL_PrepareReceive(pdev,
		914	CDC_OUT_EP,
		915	hcdc->RxBuffer,
		916	CDC_DATA_HS_OUT_PACKET_SIZE);
		917	}
		918	else
		919	{
		920	/* Prepare Out endpoint to receive next packet */
		921	USBD_LL_PrepareReceive(pdev,
		922	CDC_OUT_EP,
		923	hcdc->RxBuffer,
		924	CDC_DATA_FS_OUT_PACKET_SIZE);
		925	}
		926	return USBD_OK;
		927	}
		928	else
		929	{
		930	return USBD_FAIL;
		931	}
		932	}
		933	/**
		934	* @}
		935	*/
		936
		937	/**
		938	* @}
		939	*/
		940
		941	/**
		942	* @}
		943	*/
		944
		945	/********************** (C) COPYRIGHT STMicroelectronics *END OF FILE**/

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(root)/trunk/Middlewares/ST/STM32_USB_Device_Library/Class/CDC/Src/usbd_cdc.c – Rev 16