Raspi 4

[6b4g]

Thanks for this example!
I'm running your code on a Rasperry Pi4 with 64-bit RpiOs. GCC sets the uintptr_t type to a unsigned long int which in the automatic conversion to uint32_t crashed the program. Changing all declarations of uintptr_t to uint32_t solved the issue.

[bpesun]

how you ever meet the question like 'could not request channel' ? It seemed the pwm dma can not be used in my work.

[besp9510]

Thanks for bringing this issue up 6b4g. Apologies on the delay, I've pushed an update that has replaced all uintprt_t with uin32_t. Feel free to reopen if it doesn't work on your Pi.

I'll address bpesun's issue in the other thread.