This module loads the Pulse Width Modulation (pwm) driver of the embedded device.
When imported, automatically sets the system pwm driver to the default one.
write(pin, period, pulse, time_unit=MILLIS)
Activate PWM (Pulse Width Modulation) on pin
pin (must be one of the PWMx pins, expressed as Dx.PWM). The state of pin is periodically switched between
HIGH according to parameters:
periodis the duration of a pwm square wave
pulseis the time the pwm square wave stays in the
time_unitis the unit of time period and pulse are expressed in
A PWM wave can be depicted as a train of elements made like this:
HIGH _________________ _________________ | | | | | | | | _____| |________| |____ LOW <-----PULSE------> <-----PERIOD-------------->
Here are some examples:
#Remember to import the pwm module import pwm # A 1000 milliseconds wave that stays HIGH for 100 milliseconds and LOW for 900 pwm.write(D5.PWM,1000,100) # A 500 microseconds wave that stays HIGH for 10 microseconds and LOW for 490 pwm.write(D5.PWM,500,10,MICROS) # Disable pwm pwm.write(D5.PWM,0,0)