Open Jonah-Hansen opened 5 years ago
It's been a while since you raised this issue- have you had any luck since?
I'm afraid I don't know offhand why PCM would fail on BCM 21 - did you have an oscilloscope handy to verify that anything was being output on this pin?
I'm working on a large scale project with 3844 total leds on sk6812 strips. using this library, I've been able to address up to about 2700 of them using GPIO 18 with PWM , but I was hoping to be able to use PCM and be able to light all of them.
Using a test strand of about 60 leds I've been playing around with trying to get them to work on GPIO 21 but i have yet to even see them light up. GPIO 18 works fine.
some more info: using a raspberry pi 3 B+ that boots into rasbian jesse using the guide here as I read in another issue that pcm doesn't work on stretch. (I had also tried it on stretch with no results)
Am I doing something wrong, or is there a better way to do this maybe? I would consider trying to use SPI if it can also handle the number of leds.