Code for BeagleBone Black 4-bin binary LED counter

bbled.py

import Adafruit_BBIO.GPIO as GPIO
import time

def setled(i):
	print i
	if((i&0x1)==0x1):
		GPIO.output("P8_26",GPIO.HIGH)
	else:
		GPIO.output("P8_26",GPIO.LOW)
	
	if((i&0x2)==0x2):
		GPIO.output("P9_23",GPIO.HIGH)
	else:
		GPIO.output("P9_23",GPIO.LOW)
	
	if((i&0x4)==0x4):
		GPIO.output("P9_15",GPIO.HIGH)
	else:
		GPIO.output("P9_15",GPIO.LOW)

	if((i&0x8)==0x8):
		GPIO.output("P8_13",GPIO.HIGH)
	else:
		GPIO.output("P8_13",GPIO.LOW)
	
def bbled():
	GPIO.setup("P8_26", GPIO.OUT)
	GPIO.setup("P9_23", GPIO.OUT)
	GPIO.setup("P9_15", GPIO.OUT)
	GPIO.setup("P8_13", GPIO.OUT)
	for i in range(16):
		setled(i%16 )
		time.sleep(1)

if __name__ == "__main__":
	bbled()