import time
from machine import ADC, Pin, Timer
from math import log

buttons=[Pin(16+i,Pin.IN,Pin.PULL_UP) for i in range(2)]
digital_value=ADC(28)
digitals=ADC(27)

SEVEN_SEGMENT_START_PIN = 0
DISPLAY_COUNT = 4
DECIMAL_PRECISION = 3

digit_list_hex = [
    0x40, 0x79, 0x24, 0x30, 0x19, 0x12, 0x02, 0x78,
    0x00, 0x10, 0x08, 0x03, 0x46, 0x21, 0x06, 0x0E
]
values=[]
previous=0
segment_pins = []
display_select_pins = []
current_display_index = DISPLAY_COUNT - 1
display_timer = Timer()
update_timer = Timer()
button_state=None
DECIMAL_PRECISION2=None



def enable_display_timer():
    display_timer.init(period=30, mode=Timer.PERIODIC, callback=scan_display)

def scan_display(timer_int):
    global current_display_index, display_value
    digit = int((voltage // pow(10, current_display_index))) % 10
    display_digit(digit, current_display_index, current_display_index == DECIMAL_PRECISION or current_display_index == DECIMAL_PRECISION2  )
    current_display_index = (current_display_index - 1)
    if current_display_index < 0:
        current_display_index = DISPLAY_COUNT -1

def display_digit(digit_value, digit_index, dp_enable=False):
    for pin in display_select_pins:
        pin.value(0)
    mask = digit_list_hex[digit_value]
    for i in range(7):
        segment_pins[i].value((mask >> i) & 1)

    segment_pins[7].value(1 if dp_enable == False else 0)
    if digit_index == -1:
        for pin in display_select_pins:
            pin.value(1)
    elif 0 <= digit_index < DISPLAY_COUNT:
        display_select_pins[digit_index].value(1)

def read_analogue_voltage(Pin) :
    global button_state,previous,voltage,values,DECIMAL_PRECISION2
    if time.ticks_diff(time.ticks_ms(),previous)> 200:
        previous  =  time.ticks_ms()
        button_state = 1
        if len(values)>16:
            values=[]
        digital=digital_value.read_u16()
        digital2=digitals.read_u16()
        if Pin ==buttons[0]:
                voltage=((digital2/ 65535)*5)*1000
                voltage1=((digital/ 65535)*5)*1000
                print(f"the value of the voltage of temp sensor :{int(voltage)}mv")
                print(f"the value of the voltage of potentiometer :{int(voltage1)}mv")
        else:
            BETA = 3950
            voltage=int(( 1 / (log(1 / (65535. / digital - 1)) / BETA + 1.0 / 298.15) - 273.15)*100)
            print(f"print temp in celsius:{voltage/100}")
        if 99<voltage<999:
            voltage=voltage*10
        if voltage<0:
            voltage=-voltage
            DECIMAL_PRECISION2=0
        else:
            DECIMAL_PRECISION2=None
            
fun=[buttons[i].irq(trigger=machine.Pin.IRQ_FALLING, handler=read_analogue_voltage)for i in range(len(buttons))]

def setup():
    for i in range(SEVEN_SEGMENT_START_PIN + 8, SEVEN_SEGMENT_START_PIN + 8 + DISPLAY_COUNT):
        pin = Pin(i, Pin.OUT)
        pin.value(0)
        display_select_pins.append(pin)
    for i in range(SEVEN_SEGMENT_START_PIN, SEVEN_SEGMENT_START_PIN + 8):
        pin = Pin(i, Pin.OUT)
        pin.value(1)
        segment_pins.append(pin)
    display_timer = machine.Timer()
    enable_display_timer()
while True:
    if button_state==1:
        setup()
        button_state=0
    time.sleep(1)