aqm0802/1602 on raspberry pi pico micropython

 http://jh7ubc.web.fc2.com/Raspberry_Pi/Raspberry_Pi_Pico/Pi_Pico_AQM0802A.html

ちあんとうごいた

from machine import Pin, I2C

import utime

i2c = I2C(0,freq=100000,scl=Pin(17),sda=Pin(16))

addr=0x3e

buf=bytearray(2)

def write_cmd(cmd):

    buf[0]=0x00

    buf[1]=cmd

    i2c.writeto(addr,buf)

def write_char(char):

    buf[0]=0x40

    buf[1]=char

    i2c.writeto(addr,buf)

def print(str):

    for c in str:

     write_char(ord(c))

def LCD_cursor(x,y):

    if y==0:

        write_cmd(0x80+x)

    if y==1:

        write_cmd(0xc0+x)

def LCD_clear():

    buf[0]=0x00

    buf[1]=0x01

    i2c.writeto(addr,buf)

    utime.sleep(0.001)

def LCD_home():

    buf[0]=0x00

    buf[1]=0x02

    i2c.writeto(addr,buf)

    utime.sleep(0.001)

def LCD_init():

    orders = [b'\x38', b'\x39', b'\x14', b'\x73', b'\x56', b'\x6c',b'\x38', b'\x0c', b'\x01']

    utime.sleep(0.04)

    for order in orders:

        i2c.writeto_mem(addr, 0x00, order)

        utime.sleep(0.001)

LCD_init()

LCD_clear()

LCD_home()

print('JH7UBC')

num=0

while True:

    LCD_cursor(0,1)

    print(str(num))

    num=num+1

    utime.sleep(1)