CCS/TMS320F28379D: ADC Post processing block - no difference in ADC Result Reg

Hasan

Part Number: TMS320F28379D

Tool/software: Code Composer Studio

Hi,

i am reading ADC values from ADC Channel 0. I have initiated two SOCs. One SOC gives the original value that i get from ADC Channel 0. Another SOC is initiated to give an Offset Adjusted value. On Debug i get the nearly same value on both ADC Result Regs (ADCResult0 & ADCResult1. ) even though i have put 1000 on OFFCAL Reg.

While Debugging, in the Registers section. The value gets uploaded to the OFFCAL Reg and PPBCONFIG Register is uploaded with SOC1. Some snaps of code are below.

over 6 years ago

0 Joseph Casuga over 6 years ago

TI__Mastermind 38830 points

Hi Shazbaz,

If you use the PPB, the results have to be read from the ADCPPB results register. In your code, you are using PPB1 so you need to read the PPB-adjusted conversion results from AdcaResultsRegs.ADCPPB1RESULT.

Hope this helps.

Regards,

Joseph

0 Hasan over 6 years ago in reply to Joseph Casuga

Intellectual 405 points

Hi Joseph,

I have changed the code and reading now from AdcaResultsRegs.ADCPPB1RESULT regs but the result is still the same. If you see the function SetupADCSoftware, 1 is the SOC that i am using for post processed results and 3000 and 500 are the ADC TripHI and TRIPLO values. I have added the screenshots

0 Hasan over 6 years ago in reply to Joseph Casuga

Intellectual 405 points

The difference between offset and actual value was too high. Thanks :)

0 Joseph Casuga over 6 years ago in reply to Hasan

TI__Mastermind 38830 points

Hi Hasan,

Looks like your issue is resolved based on your last communication so I am marking this thread resolved. If you have any issues with PPB, please post it in the forum.

Best regards,

Joseph

C2000™︎ microcontrollers

C2000 microcontrollers forum

CCS/TMS320F28379D: ADC Post processing block - no difference in ADC Result Reg