#!micropython
# -*- coding: UTF-8 -*-
# vim:fileencoding=UTF-8:ts=4
#╭──────────────────────────────────────────────────────────────────────────────╮
#│      PICO_THREAD_PIN_IRQ_TEST.PY                                             │
#│      Board:       PICO2/RP2350                                               │
#│      Micropython: 3.4.0; MicroPython v1.26.0 on 2025-08-09                   │
#│      Testing:     Pin.irq() on both cores                                    │
#│                   using a bridge between GPIO16 and GPIO17                   │
#│                   GPIO16 runs a slow PWM                                     │
#│                   GPIO17 acts as an input with IRQ                           │
#╰──────────────────────────────────────────────────────────────────────────────╯

import _thread
from sys import version
from array import array
from machine import Pin, PWM
from time import sleep_ms

_SIO_BASE   = const(0xd0000000)
_CPUID      = const(0x000 >>2)
_THREAD_HLT = const(0)
_THREAD_RUN = const(1)
_THREAD_FIN = const(2)

@micropython.viper
def cpuid() -> int:
    sio: ptr32 = ptr32(_SIO_BASE)
    return sio[_CPUID]

def core1(data,hard):

    def cb_core1(pin):
        print('cb_core1(): IRQ on core:', cpuid(), end='  ')
        print('count:', data[1])
        if data[1]:
            data[1] -= 1

    print('core1() is running on core:', cpuid())
    pin = Pin(17, Pin.IN, Pin.PULL_UP)
    data[1] = 5
    pin.irq(handler=cb_core1, trigger=Pin.IRQ_FALLING, hard=hard)
    while data[0] == _THREAD_RUN and data[1]:
        sleep_ms(10)
    pin.irq(None)
    pin.init()
    data[0] = _THREAD_FIN
    return

def core0():

    def cb_core0(pin):
        print('cb_core0(): IRQ on core:', cpuid(), end='  ')
        print('count:', data[1])
        if data[1]:
            data[1] -= 1

    print(version)
    data = array('I', (_THREAD_HLT,0))          # [0]state   [1] counter
    pwm = PWM(16, freq=10, duty_u16=2**15)
    print('Testing hard=False on core 0')
    pin = Pin(17, Pin.IN, None)
    data[1] = 5
    pin.irq(handler=cb_core0, trigger=Pin.IRQ_FALLING, hard=False)
    while data[1]:
        sleep_ms(10)
    pin.irq(None)
    pin.init()

    print('Testing hard=True on core 0')
    pin = Pin(17, Pin.IN, None)
    data[1] = 5
    pin.irq(handler=cb_core0, trigger=Pin.IRQ_FALLING, hard=True)
    while data[1]:
        sleep_ms(10)
    pin.irq(None)
    pin.init()

    print('Testing hard=False on core 1')
    data[0] = _THREAD_RUN
    _thread.start_new_thread(core1, (data,False))
    loops = 100
    while (loops:= loops-1) and data[0] != _THREAD_FIN:
        sleep_ms(10)
    data[0] = _THREAD_HLT
    while data[0] != _THREAD_FIN: pass

    print('Testing hard=True on core 1')
    data[0] = _THREAD_RUN
    _thread.start_new_thread(core1, (data,True))
    loops = 100
    while (loops:= loops-1) and data[0] != _THREAD_FIN:
        sleep_ms(10)
    data[0] = _THREAD_HLT
    while data[0] != _THREAD_FIN: pass

    pwm.deinit()

core0()