RCC串口通讯协议设计思想是基于帧传输方式，即在向MODEM(RS232)发送数据时是一帧一帧地发送，对于应用程序来讲，应用程序所发送的和所接收的都是流式数据，即如果应用程序需要进行上层的协议解释的话，它将面对这些流数据的重新拼装。为保证可靠的传输，在RCC进行数据传输时，采用发送/应答/握手/失败方式，即发送一帧数据，一个应答，若应答没收到，重新进行协商握手，握手失败则向应用程序报告错误。-RCC serial communication protocol design idea is based on the fr a me transfer mode, that is, to the MODEM (RS232) when sending data is a one to send, for the application, the application to send and receive are streaming data, that is, if the application is needed to explain the upper agreement, it will face these streaming data re-assembled. In order to ensure reliable transmission, data transmission in the RCC, the use of send/response/handshake/failure, that is to send a data, a response, if response not received, re-consultation to shake hands, shake hands with the failure of the report to the application error .