# Microprocesadores - ISC
from machine import Pin, I2C,time_pulse_us
from time import sleep, sleep_us

from pico_i2c_lcd import I2cLcd

i2c=I2C(0,sda=Pin(0), scl=Pin(1), freq=400000)

I2C_ADDR=i2c.scan()[0]
ECHO_PIN=26
TRIGGER_PIN=27

#crear objeto tipo lcd
lcd=I2cLcd(i2c,I2C_ADDR,2,16)
trigger=Pin(TRIGGER_PIN,Pin.OUT)
echo=Pin(ECHO_PIN,Pin.IN)

def medir_distancia():
    trigger.low()
    sleep_us(2)
    trigger.high()
    sleep_us(10)
    trigger.low()
    #duracion
    pulso_duracion=time_pulse_us(echo,Pin.high)
    #CALCULAR LA DISTANCIA
    distancia=pulso_duracion*0.034/2
    return round(distancia)

#LOOP
while True:
    distancia_lcd=medir_distancia()
    print("Distancia: {:0.1f} cm".format(distancia_lcd))

    lcd.clear()
    lcd.putstr(str(distancia_lcd)+ "cm")
    sleep(2)