# Example of using PIO writing a parallel byte from data - bit.0 to bit.7
# for a more wrapped-up examples, see https://github.com/raspberrypi/pico-micropython-examples/blob/master/pio/pio_pwm.py
# https://github.com/LifeWithDavid/Raspberry-Pi-Pico-PIO/blob/main/PIO%20Parallel%20Port

# Works !
from machine import Pin
from rp2 import PIO, StateMachine, asm_pio
from time import sleep

@asm_pio(out_init=(rp2.PIO.OUT_HIGH,) * 8, out_shiftdir=PIO.SHIFT_RIGHT, 
 autopull=True, pull_thresh=16)

def paral_prog():
    pull()  
    out(pins, 8) # change for # of bits required. 

paral_sm = StateMachine(0, paral_prog, freq=10000000, out_base=Pin(0))
paral_sm.active(1)

x = 0
while True:
    for i in range(500):
        paral_sm.put(i)
#        print(paral_sm)
#       sleep(0.01 )
#    x += 1
#    print(x)