- #Serial communication protocol design serial#
- #Serial communication protocol design full#
- #Serial communication protocol design software#
The setting of baud rate needs to comprehensively consider the serial port performance of the selected chip, the length of serial port connecting line, the maximum frame length of transmitted data and the bit error rate in the application process No flow control is due to the use of three wire serial connection.Ģ hierarchical structure of communication protocol
#Serial communication protocol design software#
there are high requirements for communication reliability and no data encryption requirements.Īccording to the system software and hardware, set the serial port working parameters as follows: 115 200 baud rate, 8-bit data bit, 1-bit stop bit, odd check and no flow control. The main tasks of inter module communication are the issuance and response of control commands, the reporting of working status and collected data, etc. Each module in the system selects S3C2440 chip of Samsung as the processor, and the operating system uses embedded Linux. The system mainly completes the functions of time interval measurement and transient data acquisition in the field environment. In the embedded Linux system environment, the protocol runs stably in the practical application system. The protocol is simple and reliable, and can adapt to a variety of system environments. By analyzing the communication requirements between devices, a layered serial frame communication protocol is designed.
In the embedded environment, serial communication is mostly used because of the long communication distance between devices, but many serial communication protocols are only suitable for the application system environment when the protocol is designed, and they are not universal, and some protocols have the risk of communication failure. On the premise of ensuring the function, the communication protocol should strive to be concise. Communication protocol is the language of data exchange between devices at both ends and the guarantee of communication reliability.
#Serial communication protocol design full#
In practical use, the simplest three wire connection is mostly used, that is, the serial ports of devices at both ends are only connected with three wires: receiving, transmitting and ground, so as to realize simple full duplex communication. It is applied to point-to-point communication mode. At present, RS 232 serial port is the most widely used serial interface in PC and communication industry. In long-distance data communication, serial communication is generally used, which has the advantages of less occupation of communication lines and low cost. It is only suitable for short-distance data transmission. The data transmission speed of parallel mode is fast, but it occupies more communication lines, and the reliability of data transmission decreases with the increase of distance. There are usually two ways of communication between embedded systems: parallel communication and serial communication.
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