pwm-fifo2.py

from machine import *
def test():
  saw = []
  sqw = []
  tri = []
  for i in range(64):
    saw.append(i*4)
    sqw.append(255 if i < 32 else 0)
    tri.append(abs(i - 32)*8)
  
  Clock(Clock.PWM, source=Clock.OSC, divi=2, divf=0, mash=0)
  p = PWM(Pin(18), tick_hz=96000000, duty_ticks=0, period=256, ms=PWM.MS_DISABLE, use_fifo=1)
  p.fifo_clear()
  while True:
    for i in range(1000):
      for w in saw:
        p.fifo_queue(w)
    for i in range(1000):
      for w in sqw:
        p.fifo_queue(w)
    for i in range(1000):
      for w in tri:
        p.fifo_queue(w)