extern __xdata uint8_t ao_packet_enable;
extern __xdata uint8_t ao_packet_master_sleeping;
extern __pdata uint8_t ao_packet_rx_len, ao_packet_rx_used, ao_packet_tx_used;
extern __xdata uint8_t ao_packet_enable;
extern __xdata uint8_t ao_packet_master_sleeping;
extern __pdata uint8_t ao_packet_rx_len, ao_packet_rx_used, ao_packet_tx_used;