moved USB directory

gat_stand_fw/user/main.c

@@ -5,9 +5,21 @@
  *
  * version 0.0.1
  *
+ *
  * notes:
  *
  * - last 2K of flash memory is reserved for configuration storage
+ *
+ *
+ * project todo:
+ *
+ * - implement config storage
+ *
+ * - implement USB CDC commmand shell
+ *
+ * - when USB is not active, go into super low power state
+ *   - light sensor is only checked once every two seconds or so
+ *   - buttons are on wakeup
  */
 
 #include <ch32v20x.h>
@@ -19,7 +31,7 @@
 #include "periph/rgbled.h"
 #include "periph/rtc.h"
 
-#include "usb/cdc.h"
+#include "periph/usb/cdc.h"
 #include "usb_lib.h"