python控制gpio的一段代码抄的

 1 import RPi.GPIO as GPIO  
 2 import time  
 3  
 4 channels = [16,18,22,24,26,19,21,23]  
 5  
 6 def init():  
 7     GPIO.setmode(GPIO.BOARD)  
 8     for x in channels:  
 9         GPIO.setup(x,GPIO.OUT)  
10         pass  
11  
12 def on(i):  
13     GPIO.output(channels[i], GPIO.HIGH)  
14  
15 def off(i):  
16     GPIO.output(channels[i], GPIO.LOW)  
17  
18 def ctrl(data):  
19     for i in channels:  
20         GPIO.output(i, data & 0x1)  
21         data = data >> 1  
22     pass  
23  
24 def test():  
25     for i in xrange(512):  
26         ctrl(i)  
27         time.sleep(0.1)  
28  
29 def clean():  
30     GPIO.cleanup()