static inline uint16_t wait_data_hi(uint16_t us);
static inline void idle(void);
static inline void inhibit(void);
-#if defined PS2_USE_INT || defined PS2_USE_USART
static inline uint8_t pbuf_dequeue(void);
static inline void pbuf_enqueue(uint8_t data);
-#endif
void ps2_host_init(void)