from machine import ADC, Timer
from time import sleep
import time
import math

button = machine.Pin(16, machine.Pin.IN, machine.Pin.PULL_UP)

last_button_time = 0
Analog_input = ADC(26)
button_pressed = False

SEVEN_SEGMENT_START_PIN = 0
DISPLAY_COUNT = 4
DECIMAL_PRECISION = 3

display_value = 0
segment_pins = []
display_select_pins = []
current_display_index = DISPLAY_COUNT - 1
display_timer = None

def read_voltage():
    digital_val = Analog_input.read_u16()
    volt = (digital_val * 3.3) / 65535
    milli_volt = volt * 1000
    print("voltage: {:.0f}mv".format(milli_volt))

def pin_ID(pin):
    return int(str(pin)[8:11].rstrip(","))

def interrupt_handler(pin):
    global last_button_time
    global button_pressed
    current_button_ts = time.ticks_ms()
    delta_button_press = current_button_ts - last_button_time
    if delta_button_press > 200:
        button_pressed = True
        print("-----------------------")
        print("pressed")
        last_button_time = current_button_ts

button.irq(trigger=machine.Pin.IRQ_FALLING, handler=interrupt_handler)

while True:
    if button_pressed is True:
        voltage_reading = read_voltage()
        button_pressed = False