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Original question:

LAUNCHXL-F28379D: DAC configuration

LAUNCHXL-F28379D: C2000 DAC from buffdac_ex2_random.c output issue

John Uriell
Prodigy 80 points
Part Number: LAUNCHXL-F28379D
Other Parts Discussed in Thread: TMS320F28379D

Tool/software:

Hello! I was attempting to use the C2000 TMS320F28379D microcontroller's DAC but building off of the example in buffdac_ex2_random.c

I've compiled and run the code, but I do not seem to be getting anything out of ADC0, which-- if I am reading the technical reference manual correctly-- is where the random ADC output signal is supposed to come from?

I've tested the ADC0 with other code and it definitely can read voltage, so it doesn't seem like that particular pin is blown up or anything-- but for whatever reason I cannot find the DAC output. Thanks.

  • +1
    TI__Mastermind 36526 points

    Hi John,

    From the comments, it looks like this example is using VDAC as reference voltage for the DAC, which needs to be applied externally.

    You can change the DAC reference to use internal reference, then this will no longer be required.

    Best Regards,

    Ben Collier