STM32篇——USB虚拟串口

#include "usbd_cdc_if.h"
//main函数中日安佳如下代码
  u_char USB_CDC_buff[] = {"STM32 HAL库USB虚拟串口测试!\r\n"};
  while (1)
  {

      CDC_Transmit_FS(USB_CDC_buff, sizeof(USB_CDC_buff));
      HAL_Delay(2000);
 }

//函数位于usbd_cdc_if.c文件中
static int8_t CDC_Receive_FS(uint8_t* Buf, uint32_t *Len)
{
  /* USER CODE BEGIN 6 */
//接收到的数据发送回去，此行代码手动添加，其余均自动生成！
  CDC_Transmit_FS(Buf,Len[0]);

  USBD_CDC_SetRxBuffer(&hUsbDeviceFS, &Buf[0]);
  USBD_CDC_ReceivePacket(&hUsbDeviceFS);
  return (USBD_OK);
  /* USER CODE END 6 */
}