TMS320F28379D: Simultaneous sampling of ADC

sonak singh

I am using simultaneous sampling of ADC for my application but in f28379d reference manual has given all four channel results store in ADCRESULT0 register.how its possible and how i will identify four signal from same register.

over 8 years ago

0 Gautam Iyer over 8 years ago

Guru 192875 points

Hi,

Simply change the ADCSOC'x'CTL register for getting the converted values in to different Result registers.

Regards,
Gautam

0 sonak singh over 8 years ago in reply to Gautam Iyer

Prodigy 120 points

thanks Gautam for reply, i have checked same register.it is working fine.

0 Gautam Iyer over 8 years ago in reply to sonak singh

Guru 192875 points

You mean you're able to filter out respective values from result0 register itself?

0 Devin Cottier over 8 years ago in reply to Gautam Iyer

TI__Guru 60865 points

Hi Sonak,

Note that there are different register sets for each of the 4 ADCs:

e.g. AdcaRegs... AdcbRegs...

So when you go to read the result registers there are 4 copies of result 0, one for each ADC.

0 sonak singh over 8 years ago in reply to Gautam Iyer

Prodigy 120 points

Hi Gautam,

This controller has four different register sets.

Please refer the below instruction:

AdcaRegs.ADCSOC0CTL.bit.CHSEL = 0;
AdcaRegs.ADCSOC0CTL.bit.ACQPS = 14;
AdcaRegs.ADCSOC0CTL.bit.TRIGSEL = 21;

AdcbRegs.ADCSOC0CTL.bit.CHSEL = 0;
AdcbRegs.ADCSOC0CTL.bit.ACQPS = 14;
AdcbRegs.ADCSOC0CTL.bit.TRIGSEL = 21;

AdccRegs.ADCSOC0CTL.bit.CHSEL = 2;
AdccRegs.ADCSOC0CTL.bit.ACQPS = 14;
AdccRegs.ADCSOC0CTL.bit.TRIGSEL = 21;

AdcdRegs.ADCSOC0CTL.bit.CHSEL = 0;
AdcdRegs.ADCSOC0CTL.bit.ACQPS = 14;
AdcdRegs.ADCSOC0CTL.bit.TRIGSEL = 21;

X = AdcaResultRegs.ADCRESULT0;
Y = AdcbResultRegs.ADCRESULT0;
Z = AdccResultRegs.ADCRESULT0;
U = AdcdResultRegs.ADCRESULT0;

four adc groups having different result registers.

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TMS320F28379D: Simultaneous sampling of ADC