accessing adc values

bharadwaj r

i have to get the digital values from the adcresult0 and convert it into the decimal value and store in in a variable of double data type...how do i do this?

over 12 years ago

0 Gautam Iyer over 12 years ago

Guru 192875 points

Hi Bharadwaj,

Voltage_Digital = AdcResult.ADCRESULT0; //Digital Value

Voltage_Analog = (Voltage_Digital * 3)/4096; //Equivalent Analog Value

Regards,

Gautam

0 Igor Gorbachev over 12 years ago

Guru 20525 points

Hello!

There are some features. For more clarity you can refer to 5554.tms320f28027.pdf (Chapter 4.1.1 p.48).

Regards,

Igor

0 bharadwaj r over 12 years ago in reply to Gautam Iyer

Intellectual 565 points

thank you for your quick reply...but the value of the Voltage_analog seen in the expression tab during runtime is a constant and does not vary with the change in voltage..how do we overcome this?

0 Gautam Iyer over 12 years ago in reply to bharadwaj r

Guru 192875 points

Which controller are you using?

0 bharadwaj r over 12 years ago in reply to Gautam Iyer

Intellectual 565 points

C2000 PICCOLO laUNCHXL-F28027

0 Gautam Iyer over 12 years ago in reply to bharadwaj r

Guru 192875 points

Check this project out: 7343.adc_soc.zip

You can check the variables and their current values on the watch window. Do not forget to press the "Refresh Continuously" button while in debugging session else you'll be able to see only the 1st value.

Regards,

Gautam

0 Felix Schinkel1 over 12 years ago in reply to Gautam Iyer

Prodigy 10 points

try it like this:

Voltage_Analog = (Voltage_Digital * 3.0)/4096; //Equivalent Analog Value

0 bharadwaj r over 12 years ago in reply to Felix Schinkel1

Intellectual 565 points

i got the output..we have to include a statement in the enable PWM timer

the statement is

CLK_enableTbClockSync(myClk);

0 Gautam Iyer over 12 years ago in reply to bharadwaj r

Guru 192875 points

Good to know you've resolved the issue.

Congrats and Cheers.

Regards,

Gautam

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accessing adc values