fix low-level USBD config bugs

tlyu · tlyu · commit 72681446d902 · 2022-12-25T19:05:05.000-06:00
Fix some bugs with tracking the active USB configuration in the
low-level USBD code.

Make config volatile. Reset config to zero on bus reset.
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
@@ -176,7 +176,7 @@ typedef struct
 struct _usb_dev
 {
     /* basic parameters */
-    uint8_t         config;
+    __IO uint8_t    config;
     uint8_t         dev_addr;
 
     __IO uint8_t    cur_status;
diff --git a/system/GD32F30x_firmware/GD32F30x_usbd_library/usbd/Source/usbd_lld_core.c b/system/GD32F30x_firmware/GD32F30x_usbd_library/usbd/Source/usbd_lld_core.c
@@ -237,6 +237,7 @@ static void usbd_ep_reset (usb_dev *udev)
     USBD_DADDR = DADDR_USBEN;
 
     udev->cur_status = (uint8_t)USBD_DEFAULT;
+    udev->config = 0U;
 }
 
 /*!

Original file line number	Diff line number	Diff line change
`@@ -237,6 +237,7 @@ static void usbd_ep_reset (usb_dev *udev)`
`237`	`237`	`USBD_DADDR = DADDR_USBEN;`
`238`	`238`
`239`	`239`	`udev->cur_status = (uint8_t)USBD_DEFAULT;`
	`240`	`+ udev->config = 0U;`
`240`	`241`	`}`
`241`	`242`
`242`	`243`	`/*!`