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danrubel / rpi_gpio.dart

Dart library for accessing the Raspberry Pi GPIO pins
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Set PWM frequency #25

Open Levi-Lesches opened 11 months ago

Levi-Lesches commented 11 months ago

As of v0.8.1, the GPIOPwm class has a dutyCycle setter, but I can't find anything to set the frequency. Are there plans to add such a feature?

I checked the native code: https://github.com/danrubel/rpi_gpio.dart/blob/42cc561b28088434b6abfc130ec2ec3cdbf68b51/lib/src/native/rpi_gpio_ext.cc#L300

Seems like this is hard-coded

danrubel commented 10 months ago

Good idea. Yes, this seems like something I can add in the fall. Code contributions are most welcome as well.

Viserion-stack commented 2 months ago

is there any update on that?

danrubel commented 2 months ago

No, nothing yet. I'm hoping to publish 1.0 soon with support for Dart 3.x, but have not had time to work on the PWM feature at all.

Viserion-stack commented 2 months ago

rpi_gpio.dart/lib/src/native/rpi_gpio_ext.cc Line 300 in 42cc561 pwmSetClock(32); // 19.2 / 32 = 600KHz - Also starts the PWM

Tried to change clock to other value but seems it now working. Basically i just want to set freq to ~50Hz but seems it's more complex than I thought. Any idea how I can reach this?