CCS/TMS320F28335: ADC results plotting graph is not coming proper as per the given inputs

Namita Pawar

Part Number: TMS320F28335
Other Parts Discussed in Thread: C2000WARE

Tool/software: Code Composer Studio

Hi,

I am using EZDSP TMS320F28335 board for the controller peripheral testing. I am testing ADC code for sine wave and square wave (0-2V @ 2KHz) as input .

I am using code in C2000Ware C:\ti\C2000Ware_1_00_05_00_Software\device_support\f2833x\examples\adc_soc . for plotting ADC readings I have converted digital results back to analog input using below line of code.

Another change, I have defined Voltage1[1000] sample array instead of 10 samples. The result plotted in graph coming as below.

As you can see the waveform is not coming as smooth values. Is there any way with which I can get better results and resolution. Please provide your inputs on same.

Best Regards,

Namita

over 6 years ago

0 Namita Pawar over 6 years ago

Intellectual 680 points

0 tlee over 6 years ago in reply to Namita Pawar

TI__Guru 62975 points

Namita,

I am not able to see any of the images that you attempted to attach.

Did you update the ADC sampling rate (EPWM SOCA triggering) to meet your requirements?

-Tommy

0 Namita Pawar over 6 years ago in reply to tlee

Intellectual 680 points

Hi Tommy,

Thanks for your response.

Yes, I was not able to attach the snap shot of graph.

I have not updated ADC sampling rate. I will make that change and test the ADC results again.

Thanks,

Namita

0 tlee over 6 years ago in reply to Namita Pawar

TI__Guru 62975 points

Namita,

It has been a while since your last update. I assume that you were able to resolve your issue.

If not, please reply to this thread. If the thread has locked due to timeout, please create a new thread describing the current status of your issue.

-Tommy

C2000™︎ microcontrollers

C2000 microcontrollers forum

CCS/TMS320F28335: ADC results plotting graph is not coming proper as per the given inputs