MicroPython - ADC 제어

main.py

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

i2c = SoftI2C(sda=Pin(13), scl=Pin(14))
display = SSD1306_I2C(128, 64, i2c, addr=0x3C)
adc = ADC(Pin(36))

def on_timeout(_):
    display.fill(0)
    display.text('DeviceMart', 0, 0)
    display.text('ADC', 0, 15)
    
    value = adc.read() # 12 bits 2^12 = 4096, 0 ~ 4095
    
    display.text(str(value) + ' / 4095', 0, 40)
    # 3.3V
    display.text(str('%.2f' % ((value / 4095) * 3.3)) + ' V', 0, 55)
    display.show()

timer = Timer(-1)
timer.init(period=100, mode=Timer.PERIODIC, callback=on_timeout)