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- /* USER CODE BEGIN Header */
- /**
- ******************************************************************************
- * @file : usbd_cdc_if.c
- * @version : v2.0_Cube
- * @brief : Usb device for Virtual Com Port.
- ******************************************************************************
- * @attention
- *
- * <h2><center>© Copyright (c) 2020 STMicroelectronics.
- * All rights reserved.</center></h2>
- *
- * This software component is licensed by ST under Ultimate Liberty license
- * SLA0044, the "License"; You may not use this file except in compliance with
- * the License. You may obtain a copy of the License at:
- * www.st.com/SLA0044
- *
- ******************************************************************************
- */
- /* USER CODE END Header */
-
- /* Includes ------------------------------------------------------------------*/
- #include "usbd_cdc_if.h"
-
- /* USER CODE BEGIN INCLUDE */
- uint8_t* CDC_RX_BUFFER = NULL ;
- /* USER CODE END INCLUDE */
-
- /* Private typedef -----------------------------------------------------------*/
- /* Private define ------------------------------------------------------------*/
- /* Private macro -------------------------------------------------------------*/
-
- /* USER CODE BEGIN PV */
- /* Private variables ---------------------------------------------------------*/
-
- /* USER CODE END PV */
-
- /** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY
- * @brief Usb device library.
- * @{
- */
-
- /** @addtogroup USBD_CDC_IF
- * @{
- */
-
- /** @defgroup USBD_CDC_IF_Private_TypesDefinitions USBD_CDC_IF_Private_TypesDefinitions
- * @brief Private types.
- * @{
- */
-
- /* USER CODE BEGIN PRIVATE_TYPES */
-
- /* USER CODE END PRIVATE_TYPES */
-
- /**
- * @}
- */
-
- /** @defgroup USBD_CDC_IF_Private_Defines USBD_CDC_IF_Private_Defines
- * @brief 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 1000
- #define APP_TX_DATA_SIZE 1000
- /* USER CODE END PRIVATE_DEFINES */
-
- /**
- * @}
- */
-
- /** @defgroup USBD_CDC_IF_Private_Macros USBD_CDC_IF_Private_Macros
- * @brief Private macros.
- * @{
- */
-
- /* USER CODE BEGIN PRIVATE_MACRO */
-
- /* USER CODE END PRIVATE_MACRO */
-
- /**
- * @}
- */
-
- /** @defgroup USBD_CDC_IF_Private_Variables USBD_CDC_IF_Private_Variables
- * @brief 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];
-
- /** Data to send over USB CDC are stored in this buffer */
- uint8_t UserTxBufferFS[APP_TX_DATA_SIZE];
-
- /* USER CODE BEGIN PRIVATE_VARIABLES */
-
- /* USER CODE END PRIVATE_VARIABLES */
-
- /**
- * @}
- */
-
- /** @defgroup USBD_CDC_IF_Exported_Variables USBD_CDC_IF_Exported_Variables
- * @brief Public variables.
- * @{
- */
-
- extern USBD_HandleTypeDef hUsbDeviceFS;
-
- /* USER CODE BEGIN EXPORTED_VARIABLES */
-
- /* USER CODE END EXPORTED_VARIABLES */
-
- /**
- * @}
- */
-
- /** @defgroup USBD_CDC_IF_Private_FunctionPrototypes USBD_CDC_IF_Private_FunctionPrototypes
- * @brief Private functions declaration.
- * @{
- */
-
- 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 Initializes the CDC media low layer over the FS USB IP
- * @retval USBD_OK if all operations are OK else USBD_FAIL
- */
- static int8_t CDC_Init_FS(void)
- {
- /* USER CODE BEGIN 3 */
- /* Set Application Buffers */
- USBD_CDC_SetTxBuffer(&hUsbDeviceFS, UserTxBufferFS, 0);
- USBD_CDC_SetRxBuffer(&hUsbDeviceFS, UserRxBufferFS);
- return (USBD_OK);
- /* USER CODE END 3 */
- }
-
- /**
- * @brief DeInitializes the CDC media low layer
- * @retval 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 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:
-
- 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 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 */
- USBD_CDC_SetRxBuffer(&hUsbDeviceFS, &Buf[0]);
- USBD_CDC_ReceivePacket(&hUsbDeviceFS);
- CDC_RX_BUFFER = Buf;
- return (USBD_OK);
- /* USER CODE END 6 */
- }
-
- /**
- * @brief CDC_Transmit_FS
- * Data to send over USB IN endpoint are sent over CDC interface
- * through this function.
- * @note
- *
- *
- * @param Buf: Buffer of data to be sent
- * @param Len: Number of data to be sent (in bytes)
- * @retval 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 */
- USBD_CDC_HandleTypeDef *hcdc = (USBD_CDC_HandleTypeDef*)hUsbDeviceFS.pClassData;
- if (hcdc->TxState != 0){
- return USBD_BUSY;
- }
- USBD_CDC_SetTxBuffer(&hUsbDeviceFS, Buf, Len);
- result = USBD_CDC_TransmitPacket(&hUsbDeviceFS);
- /* USER CODE END 7 */
- return result;
- }
-
- /* USER CODE BEGIN PRIVATE_FUNCTIONS_IMPLEMENTATION */
- #include <stdarg.h>
-
- uint16_t vcp_status( USBD_SetupReqTypedef *req){
- if(req->bRequest ==CDC_SET_CONTROL_LINE_STATE){
- if(req->wValue){
- return 1;
- }
- }
- return 0;
- }
-
- void usb_printf(const char *format, ...)
- {
- va_list args;
- uint32_t length;
-
- va_start(args, format);
- length = vsnprintf((char *)UserTxBufferFS, APP_TX_DATA_SIZE, (char *)format, args);
- va_end(args);
- for (;;) {
- if (CDC_Transmit_FS(UserTxBufferFS, length) == USBD_BUSY) {
- HAL_Delay(1);
- continue;
- }
- break;
- }
- }
- /* USER CODE END PRIVATE_FUNCTIONS_IMPLEMENTATION */
-
- /**
- * @}
- */
-
- /**
- * @}
- */
-
- /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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