TccPwm::get_max_duty() is -1 too small #911
Description
The maximum duty cycle returned by the Tcc?Pwm peripherals via Pwm::get_max_duty seems to be one too small.
At least when setting exactly this duty cycle, the resulting signal (checked via oscilloscope) is not a fully 100% high signal - it is still interrupted by short spikes to low. However, if I set the returned maximum duty cycle + 1, the resulting signal is actually a duty cycle of 100% - a permanently high signal.
To be honest, I don't really understand the driver code. I didn't spend much time with these peripherals, yet. Therefore, I cannot tell, whether just adding +1 is a good fix.