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MCU-PLUS-SDK-AM243X: Shifted from values in ADS85x8 project

Part Number: MCU-PLUS-SDK-AM243X
Other Parts Discussed in Thread: LP-AM243, ADC-PHI-PRU-EVM

Tool/software:

I have the ADS85x8 project running on an LP-AM243 and discovered that the values I am capturing from the "ADC" are shifted by 2 (I can correct this before printing the array values to the right by 2 bits (>> 2).  I found this by manually forcing b0 through b7 (which are wired to PRG0_GPO-0 to PRG0_GPO-7 on the LP) high and low then seeing which bit changes in the debugger.  Is the pin mapping for the LP-AM243 incorrect by chance, or is something in the ADS85x8 example shifting the bits before transfer to R5_0?

  • Hi Keith,

    The MCU+ SDK only has the example for AM243x-EVM, are you using that one on the LP? Currently, we have not validated it on the LP since the header needed to attach the ADC-PHI-PRU-EVM Adapter Board is not available on it.

    How are you connecting to the ADC in your setup?

    Regards,

    Nitika