115.2k串行口通信程序，校验方式为简单双向校验,而且是必要的，因为任何采用中断、crc等的方法均很难保证速度和避免错误. 总体速度5KB/秒 -115.2k serial port communication procedures and testing methods for the simple two-way check, but is necessary, Any interrupt, crc the methods are difficult to ensure that