from machine import Pin
from utime import sleep_ms

# Pines LCD
rs = Pin(12, Pin.OUT)
en = Pin(11, Pin.OUT)

d4 = Pin(10, Pin.OUT)
d5 = Pin(9, Pin.OUT)
d6 = Pin(8, Pin.OUT)
d7 = Pin(7, Pin.OUT)

# ----------------------------

def lcd_pulse():
    en.value(1)
    sleep_ms(1)
    en.value(0)
    sleep_ms(1)

def lcd_write4(b4, b5, b6, b7):
    d4.value(b4)
    d5.value(b5)
    d6.value(b6)
    d7.value(b7)
    lcd_pulse()

def lcd_send(byte, mode):

    rs.value(mode)

    # nibble alto
    lcd_write4(
        (byte >> 4) & 1,
        (byte >> 5) & 1,
        (byte >> 6) & 1,
        (byte >> 7) & 1
    )

    # nibble bajo
    lcd_write4(
        byte & 1,
        (byte >> 1) & 1,
        (byte >> 2) & 1,
        (byte >> 3) & 1
    )

def lcd_cmd(cmd):
    lcd_send(cmd, 0)
    sleep_ms(2)

def lcd_data(data):
    lcd_send(ord(data), 1)

def lcd_print(text):
    for char in text:
        lcd_data(char)

# ----------------------------
# INICIALIZACION LCD
# ----------------------------

sleep_ms(50)

lcd_cmd(0x33)
lcd_cmd(0x32)

lcd_cmd(0x28)  # 4 bits, 2 filas
lcd_cmd(0x0C)  # display ON
lcd_cmd(0x06)  # cursor incrementa
lcd_cmd(0x01)  # limpiar

sleep_ms(5)

# ----------------------------
# FILA 1
# ----------------------------

lcd_cmd(0x80)
lcd_print("* GRADO NOVENO *")

# ----------------------------
# FILA 2
# ----------------------------

lcd_cmd(0xC0)
lcd_print(" CAST - TECH ")