ble-dongle: Get USB echo running

nucleo-wb55-dongle-ble/USB_Device/App/usbd_cdc_if.c

@@ -32,7 +32,7 @@
 
 /* USER CODE BEGIN PV */
 /* Private variables ---------------------------------------------------------*/
-
+uint8_t buffer[7];
 /* USER CODE END PV */
 
 /** @addtogroup STM32_USB_OTG_DEVICE_LIBRARY
@@ -221,10 +221,16 @@ static int8_t CDC_Control_FS(uint8_t cmd, uint8_t* pbuf, uint16_t length)
   /* 6      | bDataBits  |   1   | Number Data bits (5, 6, 7, 8 or 16).          */
   /*******************************************************************************/
     case CDC_SET_LINE_CODING:
+    	for (int i = 0; i< 7; i++) {
+    		buffer[i] = pbuf[i];
+    	}
 
     break;
 
     case CDC_GET_LINE_CODING:
+    	for (int i = 0; i< 7; i++) {
+    		pbuf[i] = buffer[i];
+    	}
 
     break;
 
@@ -264,6 +270,7 @@ 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_Transmit_FS(Buf, *Len);  // echo
   return (USBD_OK);
   /* USER CODE END 6 */
 }

serial_communication.py

@@ -29,6 +29,7 @@ def main():
         logger.info(f"received: {x}")
         logger.info(f"in_waiting: {serial_connection.in_waiting}")
 
+        return
         delay = 0.1
         while True:
             logger.info("Set blue LED")