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TMS320DM357: 12-Bit ADC/DAC BIST failing

Chris Tota
Prodigy 50 points
Part Number: TMS320F28379D
Other Parts Discussed in Thread: TMDSHSECDOCK

Hello!

I am currently working with a TMS320F28379D on a TMDSHSECDOCK controlCard and am working with the Built in Self Tests (BIST). I have loaded the 'f2837xd_test_application onto the device and when running the code I receive the terminal message 'TEST FAIL: ADC/DAC 12-Bit Test!'.

Just curious as to why this is? Looking at the code it seems to be doing a simple comparison between the ADC and DAC values (as expected) and I have ADC-B0 connected to 3.3V per the C2000Tm SafeTITm Diagnostic Library Self-Test Application User Guide for the reference voltage. 

Will keep plugging away just looking for any insight!

Best Regards,

Chris

  • 0
    TI__Guru 53745 points

    Can you try putting some breakpoints in the code and seeing what the actual conversion result is? It'd be good to see if the ADC result is way off or if it's just barely outside of the range of error allowed by the software.

    Whitney