KEYWORDS: Data acquisition boards, Data transmission, Data communications, Error control coding, Data acquisition, Calibration, Error analysis, Data conversion, Interfaces, Improvised explosive devices
In view of the data transmission errors that exist when the intelligent distribution terminal AC acquisition board and the CPU board use SPI communication between the boards, and the problems that cannot be completely solved by using only CRC check and configuration register locking methods .The paper focus on the research and analyse of uncertainty of serial communication and the problem of data transmission between boards using SPI communication during the electrical fast transient pulse group interference test, which leads to the abnormal data transmission, Three improvement schemes are proposed: 1) add a booster to the SPI bus; 2) communicate using SPI via USB-SPI conversion chip; 3) communicate using RS-485 via connecting SPI to the TIM4 microprocessor, Comparative test results show that data transmission between boards changes from SPI to RS-485,which can effectively solve the problem of data transmission error between boards.
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