用CubeMX設定 USB 虛擬port 要在 usbd_cdc_if.c 找到 CDC_Receive_FS 加入 三個 欄位 { USBD_CDC_SetRxBuffer(&hUsbDeviceFS, &Buf[0]); USBD_CDC_ReceivePacket(&hUsbDeviceFS); received_data_size = *Len; memcpy(received_data, Buf, received_data_size); receive_total += received_data_size; return (USBD_OK); /* USER CODE END 6 */ } 然後再 找 #define APP_RX_DATA_SIZE 64 #define APP_TX_DATA_SIZE 64 uint8_t received_data[64]; uint32_t received_data_size; uint32_t receive_total = 0; 加入上面三個 在 usbd_cdc_if.h定義 那三個欄位 extern uint8_t received_data[]; extern uint32_t received_data_size; extern uint32_t receive_total; 最後 在main.c 加入 #include "usbd_cdc_if.h" 找 while(1)加入 while (1) { if(received_data_size >0){ if (received_data[0] == '1'){ HAL_GPIO_TogglePin(GPIOB,GPIO_PIN_8); CDC_Transmit_FS((uint8_t*)"LED PB_8.super hard