diff --git a/system/GD32F30x_firmware/GD32F30x_usbd_library/device/Include/usbd_core.h b/system/GD32F30x_firmware/GD32F30x_usbd_library/device/Include/usbd_core.h
index 4e675f00..d890268b 100644
--- a/system/GD32F30x_firmware/GD32F30x_usbd_library/device/Include/usbd_core.h
+++ b/system/GD32F30x_firmware/GD32F30x_usbd_library/device/Include/usbd_core.h
@@ -181,6 +181,11 @@ struct _usb_dev
 
     __IO uint8_t    cur_status;
     __IO uint8_t    backup_status;
+    __IO uint8_t    nreset;
+    __IO uint8_t    nsusp;
+    __IO uint8_t    nresume;
+    __IO uint8_t    nsuspsusp;
+    __IO uint8_t    nerror;
 
     usb_pm          pm;
 #ifdef LPM_ENABLED
diff --git a/system/GD32F30x_firmware/GD32F30x_usbd_library/usbd/Source/usbd_lld_int.c b/system/GD32F30x_firmware/GD32F30x_usbd_library/usbd/Source/usbd_lld_int.c
index a714f5ac..9f449d45 100644
--- a/system/GD32F30x_firmware/GD32F30x_usbd_library/usbd/Source/usbd_lld_int.c
+++ b/system/GD32F30x_firmware/GD32F30x_usbd_library/usbd/Source/usbd_lld_int.c
@@ -181,11 +181,13 @@ void usbd_isr (void)
 
     if (INTF_ERRIF & int_flag) {
         udev->drv_handler->err();
+        udev->nerror++;
         CLR(ERRIF);
     }
     if (INTF_WKUPIF & int_flag) {
         /* restore the old cur_status */
         udev->cur_status = udev->backup_status;
+        udev->nresume++;
 
 #ifdef LPM_ENABLED
         if ((0U == udev->pm.remote_wakeup_on) && (0U == udev->lpm.L1_resume)) {
@@ -253,6 +255,7 @@ void usbd_isr (void)
         CLR(RSTIF);
 
         udev->drv_handler->ep_reset(udev);
+        udev->nreset++;
     }
 
 #ifdef LPM_ENABLED
@@ -305,7 +308,10 @@ static void usbd_int_suspend (usb_dev *udev)
      */
     if (udev->cur_status != USBD_SUSPENDED) {
         udev->backup_status = udev->cur_status;
+    } else {
+        udev->nsuspsusp++;
     }
+    udev->nsusp++;
 
     /* set device in suspended state */
     udev->cur_status = (uint8_t)USBD_SUSPENDED;