Reliable data interaction method based on RS-422 serial bus technique
A RS-422, serial bus technology, applied in the field of communication, can solve the problems of limited communication reliability, affecting the dynamic performance of the system, reducing the amount of data unit transmission, etc., to improve the communication speed, improve the communication speed and channel utilization. efficiency, improve reliability
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[0045] The user needs to download 5 sets of parameters and 8 timings from the host computer to the lower computer. After the download is complete, command the lower computer to release the trigger.
[0046] After the user writes the timing and parameters, the host computer adds the first 0xEB, the second frame header 0x90, and the frame label (0x01+current time) to the downloaded first set of parameters in sequence, select the frame type as 0x1A, and write according to the actual situation The parameter length is used to calculate the frame length, and the cyclic redundancy check is performed on the data frame, and the result is used as the data in the frame check, and finally the frame tail 0xFF is added to form a complete data frame. (In this example, the agreement: the first frame header is 0xEB, the second frame header is 0x90, the frame tail is 0xFF, and the frame types corresponding to parameters, timing, and instructions are 0x1A, 0x2B, and 0x3C.) Then use the same The...
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