/* Poll for a charcter on the USB input queue.
* returns AO_READ_AGAIN if none are available
*/
-char
+int
ao_usb_pollchar(void);
/* Flush the USB output queue */
#define AO_USB_EP0_IDLE 0
#define AO_USB_EP0_DATA_IN 1
#define AO_USB_EP0_DATA_OUT 2
+#define AO_USB_EP0_STALL 3
#define LE_WORD(x) ((x)&0xFF),((uint8_t) (((uint16_t) (x))>>8))