PIO issue

[mjrx]

No matter what I set the in_base to in this program, it only responds to GPIO0. I'm stumped. The set_base works OK, I can change that to any output.

rom machine import Pin
import rp2
import time

PIO program: continuously read input pin and set output pin accordingly

@rp2.asm_pio(set_init=rp2.PIO.OUT_HIGH) # Output pin starts HIGH

def mirror_pin_jmp():
wrap_target()
jmp(pin, "high") # If input pin is HIGH, jump to 'high'
set(pins, 0) # Otherwise, set output LOW
mov(x, pins)
mov(isr, x)
push()
jmp("end") # Skip the HIGH set
label("high")
mov(x, pins)
mov(isr, x)
push()
set(pins, 1) # Set output HIGH
label("end")
nop() [5] # Small delay (debounce-friendly)
wrap()

Pin configuration

INPUT_PIN = 6 # GP6 as input, but it always reponds to GPIO0
OUTPUT_PIN = 16 # GP16, 17 0r 25 as output, RED=17, GRN=16, BLU=25

Create state machine

sm = rp2.StateMachine(
0, mirror_pin_jmp,
freq=5000, # Lower frequency for debounce (20 µs per loop)
in_base=Pin(INPUT_PIN, Pin.IN, Pin.PULL_UP),
set_base=Pin(OUTPUT_PIN, Pin.OUT)
)

Start the state machine

sm.active(1)

print(f"Mirroring GP{INPUT_PIN} -> GP{OUTPUT_PIN} using PIO. Press Ctrl+C to stop.")

try:
while True:
time.sleep(1) # CPU idle, PIO runs in hardware
print(sm.get())
except KeyboardInterrupt:
sm.active(0)
print("Stopped PIO state machine...")

[GitHubsSilverBullet]

You need to set the jmp_pin when configuring the StateMachine

#!/micropython
# vim: fileencoding=utf-8: ts=4: sw=4: expandtab:

from machine import Pin
from rp2 import PIO,StateMachine,asm_pio,bootsel_button as button
from time import sleep_ms

#PIO program: continuously read input pin and set output pin accordingly
@asm_pio(set_init=PIO.OUT_HIGH) # Output pin starts HIGH
def mirror_pin_jmp():
    wrap_target()
    jmp     (pin, "high")   # If input pin is HIGH, jump to 'high'

    label   ("low")
    mov     (x, pins)
    mov     (isr, x)
    push    ()
    set     (pins, 0)       # Otherwise, set output LOW
    jmp     ("end")         # Skip the HIGH set

    label   ("high")
    mov     (x, pins)
    mov     (isr, x)
    push    ()
    set     (pins, 1)       # Set output HIGH

    label   ("end")
    nop     () [5]          # Small delay (debounce-friendly)
    wrap    ()

# Pin configuration
# INPUT_PIN = 6 # GP6 as input, but it always reponds to GPIO0
# OUTPUT_PIN = 16 # GP16, 17 0r 25 as output, RED=17, GRN=16, BLU=25
INPUT_PIN   = 16 # DEBUG
OUTPUT_PIN  = 25 # DEBUG LED

# Create state machine
sm = StateMachine(
    0, mirror_pin_jmp,
    freq=5000,
    set_base=OUTPUT_PIN,
    jmp_pin=INPUT_PIN
    )

# Start the state machine
sm.restart()
sm.active(True)
print(f"Mirroring GP{INPUT_PIN} -> GP{OUTPUT_PIN} using PIO. Press Ctrl+C to stop.")
try:
    old = -1
    while not button():
        sleep_ms(100)
        new = sm.get()
        if new != old:
            old = new
            print('\n', bin(new))
        else:
            print('.',end='')
except KeyboardInterrupt:
    pass

sm.active(False)
del sm
print("Stopped PIO state machine...")
outpin = Pin(OUTPUT_PIN, Pin.OUT, value=0)

[Josverl]

@mjrx

Tip: use 'triple backtick'
```py
# code goes here
``` around your code snippets to get syntax highlighting and proper indenting.