How can I generate Arbitrary PWM with specific pattern on C2834x DSP?

Question

Ahmed Khamis 2020-6-15

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/548700-how-can-i-generate-arbitrary-pwm-with-specific-pattern-on-c2834x-dsp

评论： Ahmed Khamis 2020-7-14

Hello.

I am trying to generate a signal with same width as in figure on 2834x DSP using c2000 support package. Unfortunately ePWm modules CANNOT be used and the only option that I have got are the GPIO pins. I tried repeating sequence stair block and it worked fine When sampling time was 1/(3*140000). However, when decreasing the samplig time to 1/(12*140000), the PWM pin behaviour becomes awkward and the pins is either always ON r always OFF. I tried modifing the step size to be lower value 1/(120*140000), but it also gave this awkward behaviour.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Venkatesh Chilapur 2020-7-2

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/548700-how-can-i-generate-arbitrary-pwm-with-specific-pattern-on-c2834x-dsp#answer_459766

Hi,

Here is an idea:

I set the solver to 0.01step time in above case.

HTH,

Regards,

Venkatesh C

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Ahmed Khamis 2020-7-14

This doesn't work, I even checked the output of "rem" block, it is zero all the time. Anyways, I doubt that this logic would output a signal with same pattern shown in scope in my original question.

请先登录，再进行评论。