case KEY_HFP_SEND_DATA:printf(“KEY_HFP_SEND_DATA\n”);u8 user_cmd[] “ATbbbbbbb\r\0”;extern int user_send_at_cmd_prepare(u8 *data,u16 len);u8 err user_send_at_cmd_prepare(user_cmd,strlen(user_cmd));printf(“err %d\n”,err);printf(“user_cmd %s size %d\n”,user_cmd,strlen(user_cmd));printf(“get_curr_channel_state HFP_CH %d get_curr_channel_state HFP_AG_CH %d\n”,get_curr_channel_state() HFP_CH,get_curr_channel_state() HFP_AG_CH);break;