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I often find my self in a situation when i need to debug systems of a MCU and other device which comunicate by SPI interface.

most of the times we use a logic analyzer between the master and the slave , which can decode to hex or binary , its very time comsuming.

is there a tool where i can define a custom protocol , so the frames are decoded and automaticaly?

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  • \$\begingroup\$ Many logic analyzers have SPI decoding. What are you using? \$\endgroup\$
    – jwh20
    Commented Jan 12, 2021 at 15:16
  • \$\begingroup\$ Single step the code with a debugger is the usual tool. Just staring at the raw data on a scope without access to the actual code at the same time isn't very productive. \$\endgroup\$
    – Lundin
    Commented Jan 12, 2021 at 15:25

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Sigrok is free/open source software able to operate most logic analyzers intended to support custom python backends and including many such example decoders.

You can also simple pipe output into a solution in some other language.

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  • \$\begingroup\$ thats exactly what im trying to avoid. :) Thanks for your answer .. instead of coding a script , i would like a logic analizer that has built in decoding feature.... it would make me save some time , also it would be great to be able to trigger on some specific command or condition \$\endgroup\$
    – Cristian Mardones
    Commented Jan 12, 2021 at 15:15
  • \$\begingroup\$ You get what you ask for - you said "custom" which practically much means "script". For basic things like I2C most analyzers already do that. \$\endgroup\$
    – Chris Stratton
    Commented Jan 12, 2021 at 15:18

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