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programing 8051 to read spi protocol

shwetha s

hi i am a student tryin to read the data between two spi devices by tapping the lines in the middle please help me if anyone hav a code to read the ss,mosi,miso,sclk signals using GPIO they vl jst act lyk input port n read

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  • 0 in reply to Cpt. Vince

    You totally forget that SPI is a synchronous transfer. Your code does not tick forward in sync with the clock signal. And should you step time (increment i) even when no slave select?

    And you have a bit of duplicated code in there.

    By the way - what is the meaning of the magic number 18? Does it in any way relate to the data you are sniffing?

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  • 0 in reply to Cpt. Vince

    You totally forget that SPI is a synchronous transfer. Your code does not tick forward in sync with the clock signal. And should you step time (increment i) even when no slave select?

    And you have a bit of duplicated code in there.

    By the way - what is the meaning of the magic number 18? Does it in any way relate to the data you are sniffing?

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