Comments (1)
I have the same problem. PWM0 on gpio 12 works fine when using sysfs (/sys/class/pwm/pwmchip0/). But when i try to use gpioHardwarePWM with frequencies 880, 10000, 20000... and dutycycle 50% signal becomes wrong. After testing on diffrents CM4 we have it appears that this happens on CM4 2 GB ram (b03140) BUT gpioHardwarePWM works fine on CM4 4 GB (c03140). I don't know why an amount of ram affects this(there are no other diffrences between CM4(there is only one revision of CM4) as far as i know).
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