ADC Code Problem with TMS320F28027 (C2000 Piccolo LaunchPad)

Hi Nikolaos,

In this example to increase the sample rate you will want to reduce the value of EPwm1Regs.TBPRD.

Increasing ACQPS will reduce the sample rate, but only in continuous sampling operation. In ePWM driven operation it will increase the trigger-to-output latency.

You may want to get the unmodified example to work correctly before worrying about changing the sample rate. How are the results incorrect? Is it distorted, or not at all what you input? In the first case, you may want to look at what circuitry you are using for signal conditioning and consider things like reducing the signal source impedance, adding some signal filtering, increasing the S+H duration, and/or buffering the signal. In the second case, you may want to check that you are sourcing your signal to the correct pin and that the current sample rate won't cause aliasing of your signal (if you are getting aliasing, try to get things working with a slower signal first).

Note that there are some continuous conversion examples for F2807x. This device has a somewhat similar ADC SW model to F2802x, so it shouldn't be too hard to port these examples to F2802x. I think there is also an example of continuous full-speed conversions in the ADC header files in the Uint16 AdcConversion(void) function inside F2802x_adc.c inside the F2802x_common directory.