from machine import Pin
import time
from neopixel import Neopixel

pixels = Neopixel(8, 0, 5, "GRBW", transfer_mode="PUT_CRITICAL")

SIG = machine.ADC(26) #Analog read on pin 26
S0 = Pin(0, Pin.OUT)
S1 = Pin(1, Pin.OUT)
S2 = Pin(2, Pin.OUT)
S3 = Pin(3, Pin.OUT)
EN = Pin(4, Pin.OUT)

maxNumControllers = 16  # Number of channels in the CD74HC4067 multiplexer
actualNumControllers = 1    # Number of channels actually used

def set_mux_channel(channel):
    """Set the CD74HC4067 multiplexer channel."""
    S0.value((channel >> 0) & 1)
    S1.value((channel >> 1) & 1)
    S2.value((channel >> 2) & 1)
    S3.value((channel >> 3) & 1)
    EN.value(0)  # Enable the multiplexer
    time.sleep_ms(10)  # Wait for the multiplexer to settle


def read_mux_channel(channel):
    """Read the value from the specified channel of the CD74HC4067 multiplexer."""
    set_mux_channel(channel)
    return SIG.read_u16()  # Read the signal value from the selected channel

# Will return a integer
def convert(x, in_min, in_max, out_min, out_max):
    return (x - in_min) * (out_max - out_min) // (in_max - in_min) + out_min

pixels.clear()
pixels.show()

while True:
    for i in range(actualNumControllers):
        value = read_mux_channel(i)
        if i < 8:
            red = 0
            if value > 56000: #Threshhold
                red = convert(value, 0, 65535, 0, 255) #Convert 16bit to 8 bit
                print(value)
            pixels.set_pixel(i, (red, 0, 0, 0),255)
            pixels.show()
        else:
           print(value)