Change the PWM frequency

[americodias]

Hi Khoi,

Describe the bug

I'm not sure if this is a bug or a "feature", but I wanted to dynamically change the PWM frequency and I'm not able to do so using the setPWM function.

Steps to Reproduce

Example code: https://pastebin.com/raw/bAJ09Jn9

Expected behavior

I was expecting to have 2s of 1000Hz and then 2s of 2000Hz repeatedly.

Actual behavior

Frequency stays constant at 1000Hz.

Thanks,
Américo

[americodias]

Hi again,

I forgot to mention that if I instantiate new objects each time it works:

void loop()
{
  delay(200);
  frequency = 1000;
  PWM_Instance = new RP2040_PWM(pin0, frequency, 50);
  PWM_Instance->setPWM();

  delay(200);
  frequency = 2000;
  PWM_Instance = new RP2040_PWM(pin0, frequency, 50);
  PWM_Instance->setPWM();

}

But this is not optimal I guess.

EDIT: As I expected this will end up crashing as you are instantiating new objects without deleting the previous ones.

Kind regards,
Américo

[khoih-prog]

Hi @americodias

Thanks for reporting an interesting bug due to my fault. I'm releasing by today the new release v1.0.2 to fix the issue.

I'd really appreciate your contribution. Happy bug finding.

Best Regards,

KH

[khoih-prog]

Hi @americodias

The new RP2040_PW releases v1.0.2 has just been published

Your contribution again has been noted in Contributions and Thanks

Check the new PWM_DynamicFreq example and verify if it's OK now.

The library is definitely better and more useful now. Looking forward to receiving more bug reports from you.

Best Regards,

KH

---

Releases v1.0.2

1. Fix bug not changing frequency dynamically. See Change the PWM frequency #2

[americodias]

Hi @khoih-prog,

Thanks for the quick fix. I will test it asap.

Kind regards,
Américo

[khoih-prog]

Hi,

Be sure to test using the new and better RP2040_PWM releases v1.0.3

Thanks,

---

Releases v1.0.3

1. Not reprogram if same PWM frequency.
2. Add PIO strict lib_compat_mode