Accessing the ADC result registers in F2812

Hi all,

Could you please tell me how do i perform computation with ADC outputs? I need to write commands in C. I know that ADC outputs can be accessbile through ADC result register. Incase if i do some computation with the results in ADC,should i get the value of ADCresult register in hexa, or binary or decimal?

For example, i want the result of realtime voltage input, it would be in ADC result register, can i directly use the ADCresult register value by assinging it as a variable with Uint16 and make use of it in my calculation??? Is the following command right?

Uint16 V= AdcRegs.ADCRESULT0;

what is the meaning of this command, I saw it in TI's example. Why should we right shift the results by 4digits.?
Can any one tell me?
Voltage[ConversionCount] = AdcRegs.ADCRESULT1 >>4;

thanks in advance.

regards

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Hi,

If you check spru060 (nowadays it is on revision D, I believe), you
will see that ADCRESULTn register is a 16 bit register and the first 4
bits (from 0 to 3) are reserved.
The adc conversion is placed on 12 bits: from 4 to 15.
If you use the command you mention "Uint16 V= AdcRegs.ADCRESULT0;",
you are going to have a wrong conversion result. The shift is really
necessary.

Regards
Gloria

--- In c..., naayagi04@... wrote:
>
> Hi all,
>
> Could you please tell me how do i perform computation with ADC
outputs? I need to write commands in C. I know that ADC outputs can be
accessbile through ADC result register. Incase if i do some
computation with the results in ADC,should i get the value of
ADCresult register in hexa, or binary or decimal?
>
> For example, i want the result of realtime voltage input, it would
be in ADC result register, can i directly use the ADCresult register
value by assinging it as a variable with Uint16 and make use of it in
my calculation??? Is the following command right?
>
> Uint16 V= AdcRegs.ADCRESULT0;
>
> what is the meaning of this command, I saw it in TI's example. Why
should we right shift the results by 4digits.?
> Can any one tell me?
> Voltage[ConversionCount] = AdcRegs.ADCRESULT1 >>4;
>
> thanks in advance.
>
> regards
>


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