# imports
import machine
import math
import utime
from machine import Pin , ADC
from utime import sleep
#######################################
# Pin and constant definitions
DIG_1 = 11 
DOT_PIN = 7
start_time = 0
inputs =ADC(22)
p_button =Pin(28 , Pin.IN ,Pin.PULL_DOWN)

displayCodes = [
    0xC0, #0  -> 0b11000000
    0xF9, #1
    0xA4, #2
    0xB0, #3
    0x99, #4
    0x92, #5
    0x82, #6
    0xF8, #7
    0x80, #8
    0x90  #9
]
display_value = 0 
def sensor():
    global celsius
    BETA = 3950
    analogValue = temp_sensor.read_u16()
    celsius = 1 / (log(1 / (65535. / analogValue - 1)) / BETA + 1.0 / 298.15) - 273.15
    return celsius

    def scan_display():
    temp_display_value = display_value
    for i in range(3, -1, -1): # 3, 2, 1, 0
        display_digit(int(temp_display_value%10), i , i==2)
        time.sleep(0.01)
        Pin(DIG_1 + i, Pin.OUT).off()
        Pin(DOT_PIN, Pin.OUT).value(1)
        temp_display_value /= 10

def display_digit(digit_value, digit_index, dp_enable=False):
    for i in range(7): #0->7
        Pin(i, Pin.OUT).value((1<<i) & displayCodes[digit_value])
    Pin(DIG_1 + digit_index, Pin.OUT).on()
    if dp_enable:
        Pin(DOT_PIN, Pin.OUT).value(0)

def read_value():
    global display_value , celsius
    if celsius >= 0 :
      display_value = (celsius*10)
    else :
      display_value = (celsius*-10)

def main():
    while True:
        p_button.irq(trigger=Pin.IRQ_FALLING,handler=call_back)
        scan_display()

if __name__ == '__main__':
    main()