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by Benj
Wed Dec 13, 2017 10:58 am
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Re: SPI Output 0x55

Hello, SPI comms is bi-directional in nature but 99% of the time only the outgoing byte or incoming byte is used at any one time. Therefore for the read we are simply outputting an arbitrary value. If the SPI slave device you're using requires both input and output bytes to contain valid data then i...