#!/usr/bin/env python
# ////////////////////////////////////////
# //	pushLED.py
# //	Blinks an LED attached to P9_12 when the button at P9_42 is pressed
# //	Wiring:
# //	Setup:
# //	See:
# ////////////////////////////////////////
import time
import os

ms = 50   # Read time in ms

LED="50"   # Look up P9.14 using gpioinfo | grep -e chip -e P9.14.  chip 1, line 18 maps to 50
button="7" # P9_42 mapps to 7

GPIOPATH="/sys/class/gpio/"

# Make sure LED is exported
if (not os.path.exists(GPIOPATH+"gpio"+LED)):
    f = open(GPIOPATH+"export", "w")
    f.write(LED)
    f.close()

# Make it an output pin
f = open(GPIOPATH+"gpio"+LED+"/direction", "w")
f.write("out")
f.close()

# Make sure button is exported
if (not os.path.exists(GPIOPATH+"gpio"+button)):
    f = open(GPIOPATH+"export", "w")
    f.write(button)
    f.close()

# Make it an output pin
f = open(GPIOPATH+"gpio"+button+"/direction", "w")
f.write("in")
f.close()

# Read every ms
fin  = open(GPIOPATH+"gpio"+button+"/value", "r")
fout = open(GPIOPATH+"gpio"+LED+"/value", "w")

while True:
    fin.seek(0)
    fout.seek(0)
    fout.write(fin.read())
    time.sleep(ms/1000)