from machine import Pin
import time

# Define Pins
load_pin = Pin(11, Pin.OUT)         # PL pin gp1 to gp11
clock_enable_pin = Pin(9, Pin.OUT) # CE pin gp4 to gp9
data_in_pin = Pin(10, Pin.IN)       # Q7 pin gp2 to gp10
clock_in_pin = Pin(8, Pin.OUT)     # CP pin gp3 to gp8

# Pin configuration for SIPO shift register
SERIAL_DATA_PIN = Pin(0, Pin.OUT)
SHIFT_CLOCK_PIN = Pin(1, Pin.OUT)
LATCH_CLOCK_PIN = Pin(2, Pin.OUT)



interrupt_pin = Pin(7, machine.Pin.IN, machine.Pin.PULL_UP)

# Global variable to store the last interrupt time
last_interrupt_time = 0
debounce_time = 100  # debounce time in milliseconds

# Function to read data from shift registers
def read_shift_registers():
    load_pin.value(0)
    time.sleep_us(5)
    load_pin.value(1)
    time.sleep_us(5)

    # Read data from 74HC165
    clock_in_pin.value(1)
    clock_enable_pin.value(0)
    incoming = 0
    for _ in range(32):
        incoming <<= 1
        incoming |= data_in_pin.value()
        clock_in_pin.value(0)
        time.sleep_us(1)
        clock_in_pin.value(1)
        time.sleep_us(1)
    clock_enable_pin.value(1)

    return incoming

# Interrupt handler function
def interrupt_handler(pin):
    global last_interrupt_time
    current_time = time.ticks_ms()
    if time.ticks_diff(current_time, last_interrupt_time) > debounce_time:
        last_interrupt_time = current_time
        print("Interrupt occurred!, counter = ")
        data = read_shift_registers()
        if data != 0:
            switch_pos = len(bin(data))-2
            switch = "switch"+str(switch_pos)
            shift_data(data)
            print(switch)
            print(data)

# Configure interrupt handler
interrupt_pin.irq(trigger=machine.Pin.IRQ_RISING, handler=interrupt_handler)

def shift_data(data):
    """Shift data into the shift register."""
    LATCH_CLOCK_PIN.off()  # Make sure latch clock is low
    print(data)
    for i in range(8):
        bit = (data >> ((8 - 1) - i)) & 1
        print(bit)
        SERIAL_DATA_PIN.value(bit)
        SHIFT_CLOCK_PIN.on()
        SHIFT_CLOCK_PIN.off()
    LATCH_CLOCK_PIN.on()  # Latch the data to output pins
    LATCH_CLOCK_PIN.off()  # Make sure latch clock is low again
    return "OK"




# Main loop
while True:
    pass

#    load_pin.value(0)
#    time.sleep_us(5)
#    load_pin.value(1)
#    time.sleep_us(5)

#    # Read data from 74HC165
#    clock_in_pin.value(1)
#    clock_enable_pin.value(0)
#    incoming = 0
#    for _ in range(32):
#        incoming <<= 1
#        incoming |= data_in_pin.value()
#        clock_in_pin.value(0)
#        time.sleep_us(1)
#        clock_in_pin.value(1)
#        time.sleep_us(1)
#    clock_enable_pin.value(1)

#    # Print pin states
#    print("Pin States:")
#    print("{0:08b}".format(incoming))
#    time.sleep_ms(200)