usbd_cdc_core.c ( File view )

  • By gregkam 2014-10-06
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			/**
  ******************************************************************************
  * @file    usbd_cdc_core.c
  * @author  MCD Application Team
  * @version V1.1.0
  * @date    19-March-2012
  * @brief   This file provides the high layer firmware functions to manage the 
  *          following functionalities of the USB CDC Class:
  *           - Initialization and Configuration of high and low layer
  *           - Enumeration as CDC Device (and enumeration for each implemented memory interface)
  *           - OUT/IN data transfer
  *           - Command IN transfer (class requests management)
  *           - Error management
  *           
  *  @verbatim
  *      
  *          ===================================================================      
  *                                CDC Class Driver Description
  *          =================================================================== 
  *           This driver manages the "Universal Serial Bus Class Definitions for Communications Devices
  *           Revision 1.2 November 16, 2007" and the sub-protocol specification of "Universal Serial Bus 
  *           Communications Class Subclass Specification for PSTN Devices Revision 1.2 February 9, 2007"
  *           This driver implements the following aspects of the specification:
  *             - Device descriptor management
  *             - Configuration descriptor management
  *             - Enumeration as CDC device with 2 data endpoints (IN and OUT) and 1 command endpoint (IN)
  *             - Requests management (as described in section 6.2 in specification)
  *             - Abstract Control Model compliant
  *             - Union Functional collection (using 1 IN endpoint for control)
  *             - Data interface class

  *           @note
  *             For the Abstract Control Model, this core allows only transmitting the requests to
  *             lower layer dispatcher (ie. usbd_cdc_vcp.c/.h) which should manage each request and
  *             perform relative actions.
  * 
  *           These aspects may be enriched or modified for a specific user application.
  *          
  *            This driver doesn't implement the following aspects of the specification 
  *            (but it is possible to manage these features with some modifications on this driver):
  *             - Any class-specific aspect relative to communication classes should be managed by user application.
  *             - All communication classes other than PSTN are not managed
  *      
  *  @endverbatim
  *                                  
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; COPYRIGHT 2012 STMicroelectronics</center></h2>
  *
  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *        http://www.st.com/software_license_agreement_liberty_v2
  *
  * Unless required by applicable law or agreed to in writing, software 
  * distributed under the License is distributed on an "AS IS" BASIS, 
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  ******************************************************************************
  */ 

/* Includes ------------------------------------------------------------------*/
#include "usbd_cdc_core.h"
#include "usbd_desc.h"
#include "usbd_req.h"


/** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY
  * @{

  */


/** @defgroup usbd_cdc 
  * @brief usbd core module
  * @{

  */ 

/** @defgroup usbd_cdc_Private_TypesDefinitions
  * @{

  */ 
/**
  * @
}
  */ 


/** @defgroup usbd_cdc_Private_Defines
  * @{

  */ 
/**
  * @
}
  */ 


/** @defgroup usbd_cdc_Private_Macros
  * @{

  */ 
/**
  * @
}
  */ 


/** @defgroup usbd_cdc_Private_FunctionPrototypes
  * @{

  */

/*********************************************
   CDC Device library callbacks
 *********************************************/
static uint8_t  usbd_cdc_Init        (void  *pdev, uint8_t cfgidx);
static uint8_t  usbd_cdc_DeInit      (void  *pdev, uint8_t cfgidx);
static uint8_t  usbd_cdc_Setup       (void  *pdev, USB_SETUP_REQ *req);
static uint8_t  usbd_cdc_EP0_RxReady  (void *pdev);
static uint8_t  usbd_cdc_DataIn      (void *pdev, uint8_t epnum);
static uint8_t  usbd_cdc_DataOut     (void *pdev, uint8_t epnum);
static uint8_t  usbd_cdc_SOF         (void *pdev);

/*********************************************
   CDC specific management functions
 *********************************************/
static void Handle_USBAsynchXfer  (void *pdev);
static uint8_t  *USBD_cdc_GetCfgDesc (uint8_t speed, uint16_t *length);
#ifdef USE_USB_OTG_HS  
static uint8_t  *USBD_cdc_GetOtherCfgDesc (uint8_t speed, uint16_t *length);
#endif
/**
  * @
}
  */ 

/** @defgroup usbd_cdc_Private_Variables
  * @{

  */ 
extern CDC_IF_Prop_TypeDef  APP_FOPS;
extern uint8_t USBD_DeviceDesc   [USB_SIZ_DEVICE_DESC];

#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
  #if defined ( __ICCARM__ ) /*!< IAR Compiler */
    #pragma data_alignment=4   
  #endif
#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */
__ALIGN_BEGIN uint8_t usbd_cdc_CfgDesc  [USB_CDC_CONFIG_DESC_SIZ] __ALIGN_END ;

#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
  #if defined ( __ICCARM__ ) /*!< IAR Compiler */
    #pragma data_alignment=4   
  #endif
#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */
__ALIGN_BEGIN uint8_t usbd_cdc_OtherCfgDesc  [USB_CDC_CONFIG_DESC_SIZ] __ALIGN_END ;

#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
  #if defined ( __ICCARM__ ) /*!< IAR Compiler */
    #pragma data_alignment=4   
  #endif
#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */
__ALIGN_BEGIN static __IO uint32_t  usbd_cdc_AltSet  __ALIGN_END = 0;

#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
  #if defined ( __ICCARM__ ) /*!< IAR Compiler */
    #pragma data_alignment=4   
  #endif
#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */
__ALIGN_BEGIN uint8_t USB_Rx_Buffer   [CDC_DATA_MAX_PACKET_SIZE] __ALIGN_END ;

#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
  #if defined ( __ICCARM__ ) /*!< IAR Compiler */
    #pragma data_alignment=4   
  #endif
#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */
__ALIGN_BEGIN uint8_t APP_Rx_Buffer   [APP_RX_DATA_SIZE] __ALIGN_END ; 


#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
  #if defined ( __ICCARM__ ) /*!< IAR Compiler */
    #pragma data_alignment=4   
  #endif
#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */
__ALIGN_BEGIN uint8_t CmdBuff[CDC_CMD_PACKET_SZE] __ALIGN_END ;

uint32_t APP_Rx_ptr_in  = 0;
uint32_t APP_Rx_ptr_out = 0;
uint32_t APP_Rx_length  = 0;

uint8_t  USB_Tx_State = 0;

static uint32_t cdcCmd = 0xFF;
static uint32_t cdcLen = 0;

/* CDC interface class callbacks structure */
USBD_Class_cb_TypeDef  USBD_CDC_cb = 
{

  usbd_cdc_Init,
  usbd_cdc_DeInit,
  usbd_cdc_Setup,
  NULL,                 /* EP0_TxSent, */
  usbd_cdc_EP0_RxReady,
  usbd_cdc_DataIn,
  usbd_cdc_DataOut,
  usbd_cdc_SOF,
  NULL,
  NULL,     
  USBD_cdc_GetCfgDesc,
#ifdef USE_USB_OTG_HS   
  USBD_cdc_GetOtherCfgDesc, /* use same cobfig as per FS */
#endif /* USE_USB_OTG_HS  */

};

#ifdef USB_OTG_HS_INTERNAL_DMA_ENABLED
  #if defined ( __ICCARM__ ) /*!< IAR Compiler */
    #pragma data_alignment=4   
  #endif
#endif /* USB_OTG_HS_INTERNAL_DMA_ENABLED */
/* USB CDC device Configuration Descriptor */
__ALIGN_BEGIN uint8_t usbd_cdc_CfgDesc[USB_CDC_CONFIG_DESC_SIZ]  __ALIGN_END =
{

  /*Configuration Descriptor*/
  0x09,   /* bLength: Configuration Descriptor size */
  USB_CONFIGURATION_DESCRIPTOR_TYPE,      /* bDescriptorType: Configuration */
  USB_CDC_CONFIG_DESC_SIZ,                /* wTotalLength:no of returned bytes */
  0x00,
  0x02,   /* bNumInterfaces: 2 interface */
  0x01,   /* bConfigurationValue: Configuration value */
  0x00,   /* iConfiguration: Index of string descriptor describing the configuration */
  0xC0,   /* bmAttributes: self powered */
  0x32,   /* MaxPower 0 mA */
  
  /*---------------------------------------------------------------------------*/
  
  /*Interface Descriptor */
  0x09,   /* bLength: Interface Descriptor size */
  USB_INTERFACE_DESCRIPTOR_TYPE,  /* bDescriptorType: Interface */
  /* Interface descriptor type */
  0x00,   /* bInterfaceNumber: Number of Interface */
  0x00,   /* bAlternateSetting: Alternate setting */
  0x01,   /* bNumEndpoints: One endpoints used */
  0x02,   /* bInterfaceClass: Communication Interface Class */
  0x02,   /* bInterfaceSubClass: Abstract Control Model */
  0x01,   /* bInterfaceProtocol: Common AT commands */
  0x00,   /* iInterface: */
  
  /*Header Functional Descriptor*/
  0x05,   /* bLength: Endpoint Descriptor size */
  0x24,   /* bDescriptorType: CS_INTERFACE */
  0x00,   /* bDescriptorSubtype: Header Func Desc */
  0x10,   /* bcdCDC: spec release number */
  0x01,
  
  /*Call Management Functional Descriptor*/
  0x05,   /* bFunctionLength */
  0x24,   /* bDescriptorType: CS_INTERFACE */
  0x01,   /* bDescriptorSubtype: Call Management Func Desc */
  0x00,   /* bmCapabilities: D0+D1 */
  0x01,   /* bDataInterface: 1 */
  
  /*ACM Functional Descriptor*/
  0x04,   /* bFunctionLength */
  0x24,   /* bDescriptorType: CS_INTERFACE */
  0x02,   /* bDescriptorSubtype: Abstract Control Management desc */
  0x02,   /* bmCapabilities */
  
  /*Union Functional Descriptor*/
  0x05,   /* bFunctionLength */
  0x24,   /* bDescriptorType: CS_INTERFACE */
  0x06,   /* bDescriptorSubtype: Union func desc */
  0x00,   /* bMasterInterface: Communication class interface */
  0x01,   /* bSlaveInterface0: Data Class Interface */
  
  /*Endpoint 2 Descriptor*/
  0x07,                           /* bLength: Endpoint Descriptor size */
  USB_ENDPOINT_DESCRIPTOR_TYPE,   /* bDescriptorType: Endpoint */
  CDC_CMD_EP,                     /* bEndpointAddress */
  0x03,                           /* bmAttributes: Interrupt */
  LOBYTE(CDC_CMD_PACKET_SZE),     /* wMaxPacketSize: */
  HIBYTE(CDC_CMD_PACKET_SZE),
#ifdef USE_USB_OTG_HS
  0x10,                           /* bInterval: */
#else
  0xFF,                           /* bInterval: */
#endif /* USE_USB_OTG_HS */
  
  /*-----------------------------
...
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usb_cdc.h1.32 kB2013-04-23|01:09
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usb_bsp.h2.29 kB2013-04-23|01:09
usb_conf.h10.48 kB2013-04-23|01:09
usb_core.h12.29 kB2013-04-23|01:09
usb_dcd.h4.48 kB2013-04-23|01:09
usb_dcd_int.h3.03 kB2013-04-23|01:09
usb_defines.h6.52 kB2013-04-23|01:09
usb_hcd.h2.76 kB2013-04-23|01:09
usb_hcd_int.h3.65 kB2013-04-23|01:09
usb_otg.h1.97 kB2013-04-23|01:09
usb_regs.h21.22 kB2013-04-23|01:09
usbd_cdc_core.h3.87 kB2013-04-23|01:09
usbd_cdc_if_template.h1.85 kB2013-04-23|01:09
usbd_cdc_vcp.h2.89 kB2013-04-23|01:09
usbd_conf.h3.29 kB2013-04-23|01:09
usbd_core.h2.50 kB2013-04-23|01:09
usbd_def.h4.82 kB2013-04-23|01:09
usbd_desc.h3.35 kB2013-04-23|01:09
usbd_ioreq.h2.89 kB2013-04-23|01:09
usbd_req.h2.50 kB2013-04-23|01:09
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usb_bsp.c3.27 kB2013-04-23|01:09
usb_core.c55.46 kB2013-04-23|01:09
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usb_dcd_int.c21.32 kB2013-04-23|01:09
usb_hcd.c5.62 kB2013-04-23|01:09
usb_hcd_int.c21.58 kB2013-04-23|01:09
usb_otg.c9.48 kB2013-04-23|01:09
usbd_cdc_core.c24.57 kB2013-04-23|01:09
usbd_cdc_if_template.c6.07 kB2013-04-23|01:09
usbd_cdc_vcp.c6.71 kB2013-04-23|01:09
usbd_core.c11.39 kB2013-04-23|01:09
usbd_desc.c8.23 kB2013-04-23|01:09
usbd_ioreq.c5.38 kB2013-04-23|01:09
usbd_req.c19.55 kB2013-04-23|01:09
usbd_usr.c3.48 kB2013-04-23|01:09
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