# Example using PWM
to fade an LED.
# Currently set up to go from 0.5ms to 3.0ms pulse widths
# similar to what's used to drive a servo motor


import time
from machine import Pin, PWM

# Construct PWM object, with LED on Pin(25)
pwmX = PWM(Pin(16))
pwmY = PWM(Pin(17))
pwmZ = PWM(Pin(18))

# Set the PWM frequency.
pwmX.freq(50)
pwmY.freq(50)
pwmZ.freq(50)

# Fade the LED in and out a few times.
dutyX = 655
dutyY = 3176 # 1.00ms
dutyZ = 6553 # 2.00ms
direction = 1
# At 50Hz (20ms)
# 3.0ms PW = 9830 duty cycle (3992/65536)
# 0.5ms PW = 1638 duty cycle (655/65536)
while(1):
    dutyX += direction
    if dutyX > 9830:
        dutyX = 9830
        direction = -1
    elif dutyX < 1638:
        dutyX = 1638
        direction = 1
    pwmX.duty_u16(dutyX)
    pwmY.duty_u16(dutyY)
    pwmZ.duty_u16(dutyZ)
    
    time.sleep(0.002)