# L4a- program test lectura canal 0
# La intrarea ADC1 este conectata iesirea  un multiplexor
# analogic de tip HP4067. L aprimele 10 intrari sint conectate
# fotorezistente inseriate cu rezistente de 10K.

from machine import  Pin, ADC
import time
import _thread

# Conexiuni multiplexor analog
fan=_thread.allocate_lock()  # fanion mutex
s3= Pin(15, Pin.OUT)
s2= Pin(14, Pin.OUT)
s1= Pin(17, Pin.OUT)
s0= Pin(16, Pin.OUT)
e= Pin(15, Pin.OUT)

ad= ADC(Pin(27, mode=Pin.IN))  # ADC1
# Conexiuni LED -uri cu rezistente de 1 k la Vcc, active in "0".
red = Pin(16, Pin.OUT)
green= Pin(17, Pin.OUT)
blue = Pin(18, Pin.OUT)
amber = Pin(19, Pin.OUT)

red.high()                     # stare initiala
blue.high()
amber.high()
green.high()

s3.high()
s2.low()
s1.low()
s0.low()
e.high()
global x0
#x0=0.2
def readx0():      # task actualizare x0
            while 1:
                fan.acquire()  # mutex
                global x0
                s3.low()
                s2.low()
                s1.low()
                s0.low()
                e.low()
                x0=ad.read_u16()*3.3/65000
                e.high()
                fan.release() # mutex
        
_thread.start_new_thread(readx0,())   

while 1:               # receptie car. telefon 
        red.low()      # aprind
        time.sleep(0.1)
        red.high()
        global x0
        green.low()      # aprind
        time.sleep(0.1)
        green.high()  
    
    
        blue.low()     # aprind
        time.sleep(0.1)
        blue.high()    # sting
   
        amber.low()    # aprind
        time.sleep(0.1)
        amber.high()
        
        time.sleep(0.1)
        print(x0)      # valoare nivel iluminat fotorezistenta f0