#!/usr/bin/python
# -*- coding:utf-8 -*-
import RPi.GPIO as GPIO
import time

PIN = 18;

GPIO.setmode(GPIO.BCM)
GPIO.setup(PIN,GPIO.IN,GPIO.PUD_UP)
print('IRM Test Start ...')
try:
	while True:
		if GPIO.input(PIN) == 0:
			count = 0
			while GPIO.input(PIN) == 0 and count < 200:  #9ms
				count += 1
				time.sleep(0.00006)

			count = 0
			while GPIO.input(PIN) == 1 and count < 80:  #4.5ms
				count += 1
				time.sleep(0.00006)

			idx = 0
			cnt = 0
			data = [0,0,0,0]
			for i in range(0,32):
				count = 0
				while GPIO.input(PIN) == 0 and count < 15:    #0.56ms
					count += 1
					time.sleep(0.00006)
				
				count = 0
				while GPIO.input(PIN) == 1 and count < 40:   #0: 0.56mx
					count += 1                               #1: 1.69ms
					time.sleep(0.00006)
				
				if count > 8:
					data[idx] |= 1<<cnt
				if cnt == 7:
					cnt = 0
					idx += 1
				else:
					cnt += 1
			if data[0]+data[1] == 0xFF and data[2]+data[3] == 0xFF:  #check
				print("Get the key: 0x%02x" %data[2])
except KeyboardInterrupt:
	GPIO.cleanup();