Generate a 50/60Hz sine wave with F28069

Fulano de Tal

Expert 2090 points

Other Parts Discussed in Thread: CONTROLSUITE

I have read up on using HRPWM and COMP to effectively make a DAC:

http://www.ti.com/lit/pdf/spraa88

and I'd like to modify that to have my F28069 generate a 60Hz sine wave. To do this I'd have to generate a 15.36kHz pwm (60x256) right? But when I look at the charts at that PWM freq I'd have no D/A resolution. Not sure where to go from here. Any suggestions?

over 12 years ago

0 Gautam Iyer over 12 years ago

Guru 192875 points

Hi,

Why not use SGEN library for generating 50Hz sine wave? It can be found here:

C:\ti\controlSUITE\libs\dsp\SGEN\v101

Here's a reference doc: 3187.sgen_mdl.pdf

Regards,

Gautam

0 Fulano de Tal over 12 years ago in reply to Gautam Iyer

Expert 2090 points

How would one feed the output to a pin?

0 Gautam Iyer over 12 years ago in reply to Fulano de Tal

Guru 192875 points

After generating sine wave, you could then output this to a PWM pin and then put a low-pass filter on it to get a smooth sine wave.Note that the F28x is only able to output a maximum of 3.3V.

0 Chintan Pathak4 over 10 years ago in reply to Gautam Iyer

Intellectual 845 points

Gautam Iyer : Can you please expand on how to output the sine wave to the PWM pin, or point me to any resource that shows similar implementation ?

Thanks
Chintan Pathak

0 Gautam Iyer over 10 years ago in reply to Chintan Pathak4

Guru 192875 points

Chintan, please post a new thread. Also, go through the above library as that would give you an idea on how to start with.

Regards,
Gautam

C2000™︎ microcontrollers

C2000 microcontrollers forum

Generate a 50/60Hz sine wave with F28069