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TM4C129XNCZAD: SPI on SSI0 using the dk-tm4c129x

juanquique_22
Expert 1535 points

Part Number: TM4C129XNCZAD

Hello everyone.

It's my first time using the SPI protocol and I'm trying to implementing it on the dk-tm4c129x, I wanted to use the SSI0 but I can't find how to acces the PA3 that corresponds to SSI0Fss (that I supose that is the equivalent to CS)

Acording to spmu360, in the micro's schematich PA3's pin is available on the Booster Pack 2, but in the Booster Pack 2 schematich the pin doesn't appear anywhere, just in the EM_CONNECTOR_1.

So, can I access that pin from another place different from EM_CONNECTOR_1? and also: my guess that SSI0Fss is working as CS is correct?

Regards, Juan.

  • 0
    TI__Guru**** 191886 points

    Hi Juan,

     Looks like the PA3 does not appear on the Boosterpack 2. The The SSI0FSS is the CS signal. Looks like PA3 is accessible in the EM connector. 

  • 0 in reply to Charles Tsai
    Expert 1535 points

    Then, there is an error on the spmu360 because I found the next image in the first schematic

    I have an older version of the file but searching on the webpage for the most recent file I found that the schematic is the same.

    Now, what does it work for to have J16 and J17 to select between I2C and SPI? if we select SPI we don't have CS on the Booster Pack

    Thanks for your reply, you answer my question.

    Regards, Juan