#define IBMPC_ERR_SEND 0x10
#define IBMPC_ERR_TIMEOUT 0x20
#define IBMPC_ERR_FULL 0x40
+#define IBMPC_ERR_ILLEGAL 0x80
#define IBMPC_LED_SCROLL_LOCK 0
#define IBMPC_LED_NUM_LOCK 1
int16_t ibmpc_host_send(uint8_t data);
int16_t ibmpc_host_recv_response(void);
int16_t ibmpc_host_recv(void);
+void ibmpc_host_isr_clear(void);
void ibmpc_host_set_led(uint8_t usb_led);