Thanks to all for the help. The code below seems to work. My question is why
does oldstates need to be multiplied by 32? Does this means the code will only
read 32 switch changes? That would be a problem.
Code:
#!/usr/bin/env python
from time import sleep
import os
import RPi.GPIO as GPIO
GPIO.setmode(GPIO.BCM)
GPIO.setup(23, GPIO.IN)
GPIO.setup(24, GPIO.IN)
GPIO.setup(25, GPIO.IN)
oldstates=[True]*32
def changed(channel):
newstate = GPIO.input(channel)
change = oldstates[channel] and not newstate
oldstates[channel] = newstate
return change
while True:
if changed(23):
os.system('mpg321 -g 95 a.mp3')
if changed(24):
os.system('mpg321 -g 95 b.mp3')
if changed(25):
os.system('mpg321 -g 95 c.mp3')
sleep(1.1);_______________________________________________
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