Use protocol version number for USB device version

Uses the protocol version number as the USB device version
so that we don't have to find a way to embed the protocol
version into the USB protocol itself.

Author: nkarstens

lib/pbio/drv/usb/stm32_usbd/usbd_desc.c

@@ -43,6 +43,7 @@
   ******************************************************************************
   */
 /* Includes ------------------------------------------------------------------*/
+#include "pbio/protocol.h"
 #include "usbd_core.h"
 #include "usbd_conf.h"
 #include "usbd_pybricks.h"
@@ -56,6 +57,9 @@
 #define USBD_PRODUCT_FS_STRING        "Pybricks Hub"
 #define USBD_CONFIGURATION_FS_STRING  "Pybricks Config"
 #define USBD_INTERFACE_FS_STRING      "Pybricks Interface"
+#define USBD_VERSION_BCD              ((PBIO_PROTOCOL_VERSION_MAJOR << 8) | \
+                                       (PBIO_PROTOCOL_VERSION_MINOR << 4) | \
+                                       (PBIO_PROTOCOL_VERSION_PATCH))
 
 #define         DEVICE_ID1          (0x1FFF7A10)
 #define         DEVICE_ID2          (0x1FFF7A14)
@@ -83,8 +87,8 @@ __ALIGN_BEGIN uint8_t USBD_DeviceDesc[USB_LEN_DEV_DESC] __ALIGN_END = {
     HIBYTE(USBD_VID),         /* idVendor */
     LOBYTE(USBD_PID),         /* idVendor */
     HIBYTE(USBD_PID),         /* idVendor */
-    0x00,                     /* bcdDevice rel. 2.00 */
-    0x02,
+    LOBYTE(USBD_VERSION_BCD), /* bcdDevice */
+    HIBYTE(USBD_VERSION_BCD),
     USBD_IDX_MFC_STR,         /* Index of manufacturer string */
     USBD_IDX_PRODUCT_STR,     /* Index of product string */
     USBD_IDX_SERIAL_STR,      /* Index of serial number string */