367 lines
10 KiB
C
367 lines
10 KiB
C
/* USER CODE BEGIN Header */
|
||
/**
|
||
******************************************************************************
|
||
* @file usbd_cdc_if.c
|
||
* @version : v1.0_Cube
|
||
* @brief : Usb device for Virtual Com Port.
|
||
******************************************************************************
|
||
* @attention
|
||
*
|
||
* Copyright (c) 2025 STMicroelectronics.
|
||
* All rights reserved.
|
||
*
|
||
* This software is licensed under terms that can be found in the LICENSE file
|
||
* in the root directory of this software component.
|
||
* If no LICENSE file comes with this software, it is provided AS-IS.
|
||
*
|
||
******************************************************************************
|
||
*/
|
||
/* USER CODE END Header */
|
||
|
||
/* Includes ------------------------------------------------------------------*/
|
||
#include "usbd_cdc_if.h"
|
||
|
||
/* USER CODE BEGIN INCLUDE */
|
||
|
||
/* 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 */
|
||
/* 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);
|
||
static int8_t CDC_TransmitCplt_FS(uint8_t *pbuf, uint32_t *Len, uint8_t epnum);
|
||
|
||
/* 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,
|
||
CDC_TransmitCplt_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 issue a NAK packet on any OUT packet received on
|
||
* USB endpoint until 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 */
|
||
usb_receive(Buf, *Len);
|
||
USBD_CDC_SetRxBuffer(&hUsbDeviceFS, &Buf[0]);
|
||
USBD_CDC_ReceivePacket(&hUsbDeviceFS);
|
||
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;
|
||
}
|
||
|
||
/**
|
||
* @brief CDC_TransmitCplt_FS
|
||
* Data transmitted callback
|
||
*
|
||
* @note
|
||
* This function is IN transfer complete callback used to inform user that
|
||
* the submitted Data is successfully sent over USB.
|
||
*
|
||
* @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_TransmitCplt_FS(uint8_t *Buf, uint32_t *Len, uint8_t epnum)
|
||
{
|
||
uint8_t result = USBD_OK;
|
||
/* USER CODE BEGIN 13 */
|
||
UNUSED(Buf);
|
||
UNUSED(Len);
|
||
UNUSED(epnum);
|
||
/* USER CODE END 13 */
|
||
return result;
|
||
}
|
||
|
||
/* USER CODE BEGIN PRIVATE_FUNCTIONS_IMPLEMENTATION */
|
||
#include <stdarg.h>
|
||
void usb_printf(const char *format, ...)
|
||
{
|
||
va_list args; // va_list型变量,指向参数的指针
|
||
uint32_t length; // 数据的长度
|
||
uint16_t USB_TimeOut; // 超时判断时间
|
||
uint32_t Tickstart; // 计时起始时间
|
||
|
||
va_start(args, format); // 读取可变参数
|
||
|
||
// 向字符串打印指定格式的数据，并获取最终的数据长度
|
||
length = vsnprintf((char *)UserTxBufferFS, APP_TX_DATA_SIZE, (char *)format, args);
|
||
|
||
va_end(args); // 结束可变参数的读取
|
||
|
||
USB_TimeOut = 3; // 超时等待时间，这里取3ms，实测单次发送2K的数据将近2ms，用户可以根据实际需求进行调整
|
||
|
||
if (hUsbDeviceFS.dev_state == USBD_STATE_CONFIGURED) // 判断USB是否处于连接状态
|
||
{
|
||
USBD_CDC_HandleTypeDef *hcdc = (USBD_CDC_HandleTypeDef *)hUsbDeviceFS.pClassData; // 获取相应的CDC状态
|
||
|
||
Tickstart = HAL_GetTick(); // 获取当前时间
|
||
while (hcdc->TxState != 0) // 等待发送完成
|
||
{
|
||
if ((HAL_GetTick() - Tickstart) > USB_TimeOut) // 达到超时时间
|
||
{
|
||
break; // 跳出等待
|
||
}
|
||
}
|
||
}
|
||
|
||
CDC_Transmit_FS(UserTxBufferFS, length); // 调用 USB CDC函数发送数据
|
||
}
|
||
|
||
void usb_receive(uint8_t *pbuf, uint32_t len)
|
||
{
|
||
usb_printf("len = %d\r\n", len);
|
||
}
|
||
/* USER CODE END PRIVATE_FUNCTIONS_IMPLEMENTATION */
|
||
|
||
/**
|
||
* @}
|
||
*/
|
||
|
||
/**
|
||
* @}
|
||
*/
|