Raspberry Pi で LED の明るさコントロール

led-control-with-raspi.sh

#!/usr/bin/env python3

''' root 権限が無いとシステムがフリーズします '''

import wiringpi
import time

PWM_PIN = 18
STEP = 32
SLEEP_TIME = 0.05

wiringpi.wiringPiSetupGpio()
wiringpi.pinMode(PWM_PIN, wiringpi.GPIO.PWM_OUTPUT)

while True:
    for i in range(0, 1024, STEP):
        wiringpi.pwmWrite(PWM_PIN, i)
        time.sleep(SLEEP_TIME)

    for i in range(1024, 0, STEP * -1):
        wiringpi.pwmWrite(PWM_PIN, i)
        time.sleep(SLEEP_TIME)