/**
  ******************************************************************************
  * @file           : usbd_cdc_if.c
  * @brief          :
  ******************************************************************************
  * This notice applies to any and all portions of this file
  * that are not between comment pairs USER CODE BEGIN and
  * USER CODE END. Other portions of this file, whether 
  * inserted by the user or by software development tools
  * are owned by their respective copyright owners.
  *
  * Copyright (c) 2017 STMicroelectronics International N.V. 
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without 
  * modification, are permitted, provided that the following conditions are met:
  *
  * 1. Redistribution 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 other 
  *    contributors to this software may be used to endorse or promote products 
  *    derived from this software without specific written permission.
  * 4. This software, including modifications and/or derivative works of this 
  *    software, must execute solely and exclusively on microcontroller or
  *    microprocessor devices manufactured by or for STMicroelectronics.
  * 5. Redistribution and use of this software other than as permitted under 
  *    this license is void and will automatically terminate your rights under 
  *    this license. 
  *
  * THIS SOFTWARE IS PROVIDED BY STMICROELECTRONICS AND CONTRIBUTORS "AS IS" 
  * AND ANY EXPRESS, IMPLIED OR STATUTORY WARRANTIES, INCLUDING, BUT NOT 
  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A 
  * PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY
  * RIGHTS ARE DISCLAIMED TO THE FULLEST EXTENT PERMITTED BY LAW. IN NO EVENT 
  * SHALL STMICROELECTRONICS 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 */
/* USER CODE END INCLUDE */

 extern uint8_t usb_rx_buffer[128];

/** @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 UserRxBufferHS[APP_RX_DATA_SIZE];

/* Send Data over USB CDC are stored in this buffer       */
uint8_t UserTxBufferHS[APP_TX_DATA_SIZE];

/* USER CODE BEGIN PRIVATE_VARIABLES */
/* USER CODE END PRIVATE_VARIABLES */

/**
  * @}
  */ 
  
/** @defgroup USBD_CDC_IF_Exported_Variables
  * @{
  */ 
  extern USBD_HandleTypeDef hUsbDeviceHS;  
/* USER CODE BEGIN EXPORTED_VARIABLES */
/* USER CODE END EXPORTED_VARIABLES */

/**
  * @}
  */ 
  
/** @defgroup USBD_CDC_Private_FunctionPrototypes
  * @{
  */

static int8_t CDC_Init_HS     (void);
static int8_t CDC_DeInit_HS   (void);
static int8_t CDC_Control_HS  (uint8_t cmd, uint8_t* pbuf, uint16_t length);
static int8_t CDC_Receive_HS  (uint8_t* pbuf, uint32_t *Len);
/* USER CODE BEGIN PRIVATE_FUNCTIONS_DECLARATION */
/* USER CODE END PRIVATE_FUNCTIONS_DECLARATION */

/**
  * @}
  */ 
  

USBD_CDC_ItfTypeDef USBD_Interface_fops_HS = 
{
  CDC_Init_HS,
  CDC_DeInit_HS,
  CDC_Control_HS,  
  CDC_Receive_HS
};

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

/**
  * @brief  CDC_Init_HS
  *         Initializes the CDC media low layer over the USB HS IP
  * @param  None
  * @retval Result of the operation: USBD_OK if all operations are OK else USBD_FAIL
  */
static int8_t CDC_Init_HS(void)
{ 
  /* USER CODE BEGIN 8 */ 
  /* Set Application Buffers */
  USBD_CDC_SetTxBuffer(&hUsbDeviceHS, UserTxBufferHS, 0);
  USBD_CDC_SetRxBuffer(&hUsbDeviceHS, UserRxBufferHS);
  return (USBD_OK);
  /* USER CODE END 8 */ 
}

/**
  * @brief  CDC_DeInit_HS
  *         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_HS(void)
{
  /* USER CODE BEGIN 9 */ 
  return (USBD_OK);
  /* USER CODE END 9 */ 
}

/**
  * @brief  CDC_Control_HS
  *         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_HS  (uint8_t cmd, uint8_t* pbuf, uint16_t length)
{ 
  /* USER CODE BEGIN 10 */
  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:   
	
    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 10 */
}

/**
  * @brief  CDC_Receive_HS
  *         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 int incoming_message = 0;
 int completed_message = 0;
static int message_len = 0;
char message[32] = {0};

static int8_t CDC_Receive_HS (uint8_t* Buf, uint32_t *Len)
{
  int buf_offset = 0;
  USBD_CDC_SetRxBuffer(&hUsbDeviceHS, usb_rx_buffer);
  USBD_CDC_ReceivePacket(&hUsbDeviceHS);
	while(*Len)
	{
		switch(Buf[buf_offset])
		{
			case '.':
				incoming_message = 1;
				completed_message = 0;
				message_len = 0;
				buf_offset++;
				break;
			case ':' :
				message[message_len++] = '\0';
				incoming_message = 0;
				completed_message = 1;
			default:
				if(incoming_message)
				{
					message[message_len++] = Buf[buf_offset];
				}
				buf_offset++;
				break;
		}
		*Len -= 1;
	}
  return (USBD_OK);
  /* USER CODE END 11 */ 
}
/**
  * @brief  CDC_Transmit_HS
  *         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_HS(uint8_t* Buf, uint16_t Len)
{
  uint8_t result = USBD_OK;
  /* USER CODE BEGIN 12 */ 
  USBD_CDC_HandleTypeDef *hcdc = (USBD_CDC_HandleTypeDef*)hUsbDeviceHS.pClassData;
  if (hcdc->TxState != 0){
    return USBD_BUSY;
  }
  USBD_CDC_SetTxBuffer(&hUsbDeviceHS, Buf, Len);
  result = USBD_CDC_TransmitPacket(&hUsbDeviceHS);
  /* USER CODE END 12 */ 
  return result;
}

/* USER CODE BEGIN PRIVATE_FUNCTIONS_IMPLEMENTATION */
/* USER CODE END PRIVATE_FUNCTIONS_IMPLEMENTATION */

/**
  * @}
  */ 

/**
  * @}
  */ 

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

