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/**

  ******************************************************************************

  * @file           : usbd_cdc_if.c

  * @brief          :

  ******************************************************************************

  * COPYRIGHT(c) 2016 STMicroelectronics

  *

  * Redistribution and use in source and binary forms, with or without modification,

  * are permitted provided that the following conditions are met:

  * 1. Redistributions of source code must retain the above copyright notice,

  * this list of conditions and the following disclaimer.

  * 2. Redistributions in binary form must reproduce the above copyright notice,

  * this list of conditions and the following disclaimer in the documentation

  * and/or other materials provided with the distribution.

  * 3. Neither the name of STMicroelectronics nor the names of its contributors

  * may be used to endorse or promote products derived from this software

  * without specific prior written permission.

  *

  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE

  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER

  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

  *

  ******************************************************************************

*/

/* Includes ------------------------------------------------------------------*/

#include "usbd_cdc_if.h"

/* USER CODE BEGIN INCLUDE */

#include "serial.h"

/* USER CODE END INCLUDE */

/** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY

  * @{

  */

/** @defgroup USBD_CDC

  * @brief usbd core module

  * @{

  */

/** @defgroup USBD_CDC_Private_TypesDefinitions

  * @{

  */

/* USER CODE BEGIN PRIVATE_TYPES */

/* USER CODE END PRIVATE_TYPES */

/**

  * @}

  */

/** @defgroup USBD_CDC_Private_Defines

  * @{

  */

/* USER CODE BEGIN PRIVATE_DEFINES */

/* Define size for the receive and transmit buffer over CDC */

/* It's up to user to redefine and/or remove those define */

#define APP_RX_DATA_SIZE  4

#define APP_TX_DATA_SIZE  4

/* USER CODE END PRIVATE_DEFINES */

/**

  * @}

  */

/** @defgroup USBD_CDC_Private_Macros

  * @{

  */

/* USER CODE BEGIN PRIVATE_MACRO */

/* USER CODE END PRIVATE_MACRO */

/**

  * @}

  */

/** @defgroup USBD_CDC_Private_Variables

  * @{

  */

/* Create buffer for reception and transmission           */

/* It's up to user to redefine and/or remove those define */

/* Received Data over USB are stored in this buffer       */

uint8_t UserRxBufferFS[APP_RX_DATA_SIZE];

/* Send Data over USB CDC are stored in this buffer       */

uint8_t UserTxBufferFS[APP_TX_DATA_SIZE];

/* USB handler declaration */

/* Handle for USB Full Speed IP */

  USBD_HandleTypeDef  *hUsbDevice_0;

/* USER CODE BEGIN PRIVATE_VARIABLES */

/* USER CODE END PRIVATE_VARIABLES */

/**

  * @}

  */

/** @defgroup USBD_CDC_IF_Exported_Variables

  * @{

  */

  extern USBD_HandleTypeDef hUsbDeviceFS;

/* USER CODE BEGIN EXPORTED_VARIABLES */

/* USER CODE END EXPORTED_VARIABLES */

/**

  * @}

  */

/** @defgroup USBD_CDC_Private_FunctionPrototypes

  * @{

  */

static int8_t CDC_Init_FS     (void);

static int8_t CDC_DeInit_FS   (void);

static int8_t CDC_Control_FS  (uint8_t cmd, uint8_t* pbuf, uint16_t length);

static int8_t CDC_Receive_FS  (uint8_t* pbuf, uint32_t *Len);

/* USER CODE BEGIN PRIVATE_FUNCTIONS_DECLARATION */

/* USER CODE END PRIVATE_FUNCTIONS_DECLARATION */

/**

  * @}

  */

USBD_CDC_ItfTypeDef USBD_Interface_fops_FS =

{

  CDC_Init_FS,

  CDC_DeInit_FS,

  CDC_Control_FS,  

  CDC_Receive_FS

};

/* Private functions ---------------------------------------------------------*/

/**

  * @brief  CDC_Init_FS

  *         Initializes the CDC media low layer over the FS USB IP

  * @param  None

  * @retval Result of the operation: USBD_OK if all operations are OK else USBD_FAIL

  */

static int8_t CDC_Init_FS(void)

{

  hUsbDevice_0 = &hUsbDeviceFS;

  /* USER CODE BEGIN 3 */

  /* Set Application Buffers */

  USBD_CDC_SetTxBuffer(hUsbDevice_0, UserTxBufferFS, 0);

  USBD_CDC_SetRxBuffer(hUsbDevice_0, UserRxBufferFS);

  return (USBD_OK);

  /* USER CODE END 3 */

}

/**

  * @brief  CDC_DeInit_FS

  *         DeInitializes the CDC media low layer

  * @param  None

  * @retval Result of the operation: USBD_OK if all operations are OK else USBD_FAIL

  */

static int8_t CDC_DeInit_FS(void)

{

  /* USER CODE BEGIN 4 */

  return (USBD_OK);

  /* USER CODE END 4 */

}

/**

  * @brief  CDC_Control_FS

  *         Manage the CDC class requests

  * @param  cmd: Command code            

  * @param  pbuf: Buffer containing command data (request parameters)

  * @param  length: Number of data to be sent (in bytes)

  * @retval Result of the operation: USBD_OK if all operations are OK else USBD_FAIL

  */

static int8_t CDC_Control_FS  (uint8_t cmd, uint8_t* pbuf, uint16_t length)

{

  /* USER CODE BEGIN 5 */

  switch (cmd)

  {

  case CDC_SEND_ENCAPSULATED_COMMAND:

    break;

  case CDC_GET_ENCAPSULATED_RESPONSE:

    break;

  case CDC_SET_COMM_FEATURE:

    break;

  case CDC_GET_COMM_FEATURE:

    break;

  case CDC_CLEAR_COMM_FEATURE:

    break;

  /*******************************************************************************/

  /* Line Coding Structure                                                       */

  /*-----------------------------------------------------------------------------*/

  /* Offset | Field       | Size | Value  | Description                          */

  /* 0      | dwDTERate   |   4  | Number |Data terminal rate, in bits per second*/

  /* 4      | bCharFormat |   1  | Number | Stop bits                            */

  /*                                        0 - 1 Stop bit                       */

  /*                                        1 - 1.5 Stop bits                    */

  /*                                        2 - 2 Stop bits                      */

  /* 5      | bParityType |  1   | Number | Parity                               */

  /*                                        0 - None                             */

  /*                                        1 - Odd                              */

  /*                                        2 - Even                             */

  /*                                        3 - Mark                             */

  /*                                        4 - Space                            */

  /* 6      | bDataBits  |   1   | Number Data bits (5, 6, 7, 8 or 16).          */

  /*******************************************************************************/

  case CDC_SET_LINE_CODING:  

  {

          uint32_t rate = *((uint32_t *)pbuf);

          if(rate > 0)

          {

                hirda3.Init.BaudRate = rate; // match apparent baud rate seen

            HAL_IRDA_Init(&hirda3);

          }

  }

    break;

  case CDC_GET_LINE_CODING:    

    break;

  case CDC_SET_CONTROL_LINE_STATE:

    break;

  case CDC_SEND_BREAK:

    break;    

  default:

    break;

  }

  return (USBD_OK);

  /* USER CODE END 5 */

}

/**

  * @brief  CDC_Receive_FS

  *         Data received over USB OUT endpoint are sent over CDC interface

  *         through this function.

  *          

  *         @note

  *         This function will block any OUT packet reception on USB endpoint

  *         untill exiting this function. If you exit this function before transfer

  *         is complete on CDC interface (ie. using DMA controller) it will result

  *         in receiving more data while previous ones are still not sent.

  *                

  * @param  Buf: Buffer of data to be received

  * @param  Len: Number of data received (in bytes)

  * @retval Result of the operation: USBD_OK if all operations are OK else USBD_FAIL

  */

static int8_t CDC_Receive_FS (uint8_t* Buf, uint32_t *Len)

{

  /* USER CODE BEGIN 6 */

                int i = 0;

            for (i = 0; i < *Len; i++)

            {

                PutCharSerial(&uc3,Buf[i]);

            }

#if 0

            {

            UserTxBufferFS[i] = UserRxBufferFS[i];

            }

            USBD_CDC_SetTxBuffer(&hUsbDeviceFS, &UserTxBufferFS[0], *Len);

            USBD_CDC_TransmitPacket(&hUsbDeviceFS);

#endif

            USBD_CDC_SetRxBuffer(&hUsbDeviceFS, &UserRxBufferFS[0]);

            USBD_CDC_ReceivePacket(&hUsbDeviceFS);

  return (USBD_OK);

  /* USER CODE END 6 */

}

/**

  * @brief  CDC_Transmit_FS

  *         Data send over USB IN endpoint are sent over CDC interface

  *         through this function.          

  *         @note

  *        

  *                

  * @param  Buf: Buffer of data to be send

  * @param  Len: Number of data to be send (in bytes)

  * @retval Result of the operation: USBD_OK if all operations are OK else USBD_FAIL or USBD_BUSY

  */

uint8_t CDC_Transmit_FS(uint8_t* Buf, uint16_t Len)

{

  uint8_t result = USBD_OK;

  /* USER CODE BEGIN 7 */

  if(hUsbDevice_0)

  {

  USBD_CDC_SetTxBuffer(hUsbDevice_0, Buf, Len);  

  result = USBD_CDC_TransmitPacket(hUsbDevice_0);

  }

  else

  {

          result = USBD_BUSY;

  }

  /* USER CODE END 7 */

  return result;

}

/* USER CODE BEGIN PRIVATE_FUNCTIONS_IMPLEMENTATION */

int16_t CDC_Poll_UART(void)

 {

        int16_t chars = SerialCharsReceived(&uc3);

        int16_t i;

        if (chars > APP_TX_DATA_SIZE)

                chars = APP_TX_DATA_SIZE;

        for (i = 0; i < chars; i++) {

                uint8_t c;

                c = GetCharSerial(&uc3);

                UserTxBufferFS[i] = c;

        }

        if(chars) /* do not send zero chars as this looks like end of transfer and will eventually kill the link */

        {

                CDC_Transmit_FS(UserTxBufferFS, chars);

        }

        return chars;

}

/* USER CODE END PRIVATE_FUNCTIONS_IMPLEMENTATION */

/**

  * @}

  */

/**

  * @}

  */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/