MicroPython - RTC 제어

main.py

from machine import Pin, SoftI2C, RTC, Timer
from ssd1306 import SSD1306_I2C

WEEK = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
# Mon ~ Sun : 0 ~ 6

# ex) 01:20:05
pads = ['', '', '']

i2c = SoftI2C(sda=Pin(13), scl=Pin(14))
display = SSD1306_I2C(128, 64, i2c, addr=0x3C)
rtc = RTC()

# rtc.datetime()
# year, month, day, hour, minute, second
if rtc.datetime()[0] != 2022:
    rtc.datetime((2022, 11, 14, 16, 25, 0, 0, 0))

def on_timeout(_):
    datetime = rtc.datetime()
    
    display.fill(0)
    display.text('DeviceMart', 0, 0)
    display.text('RTC Clock', 0, 15)
    
    display.text(
        str(datetime[0]) +
        '-' + 
        str(datetime[1]) +
        '-' + 
        str(datetime[2]) +
        ' ' +
        WEEK[datetime[3]],
        0,
        40
    )
    
    for i in range(4, 7): # 4 ~ 6 : pads for hours, mins, secs
        if datetime[i] < 10:
            pads[i - 4] = '0'
        else:
            pads[i - 4] = ''
            
    display.text(
        pads[0] +
        str(datetime[4]) +
        ':' +
        pads[1] +
        str(datetime[5]) +
        ':' +
        pads[2] +
        str(datetime[6]),
        0,
        55
    )
    display.show()

timer = Timer(-1)
timer.init(period=300, mode=Timer.PERIODIC, callback=on_timeout)