Project 28.py

import Adafruit_BBIO.GPIO as GPIO
from time import sleep

class keypad():
    def __init__(self, columnCount = 3):
        pin1 = "P8_14"
        pin2 = "P8_16"
        pin3 = "P8_11"
        pin4 = "P9_13"
        pin5 = "P9_12"
        pin6 = "P9_26"
        pin7 = "P9_11"
        pin8 = "P9_24"

        if columnCount is 3:
            self.KEYPAD = [
                [1,2,3],
                [4,5,6],
                [7,8,9],
                ["*",0,"#"]
            ]
            self.ROW         = [pin7, pin6, pin5, pin4]
            self.COLUMN      = [pin3, pin2, pin1]
        elif columnCount is 4:
            self.KEYPAD = [
                [1,2,3,"A"],
                [4,5,6,"B"],
                [7,8,9,"C"],
                ["*",0,"#","D"]
            ]
            self.ROW         = [pin8, pin7, pin6, pin5]
            self.COLUMN      = [pin4, pin3, pin2, pin1]
        else:
            return
    def getKey(self):
        for j in range(len(self.COLUMN)):
            GPIO.setup(self.COLUMN[j], GPIO.OUT)
            GPIO.output(self.COLUMN[j], GPIO.LOW)
        for i in range(len(self.ROW)):
            GPIO.setup(self.ROW[i], GPIO.IN, GPIO.PUD_DOWN)

        rowVal = -1
        for i in range(len(self.ROW)):
            tmpRead = GPIO.input(self.ROW[i])
            if tmpRead == 0:
                rowVal = i
        if rowVal <0 or rowVal >3:
            self.exit()
            return
        for j in range(len(self.COLUMN)):
                GPIO.setup(self.COLUMN[j], GPIO.IN, GPIO.PUD_DOWN)
        GPIO.setup(self.ROW[rowVal], GPIO.OUT)
        GPIO.output(self.ROW[rowVal], GPIO.HIGH)

        colVal = -1
        for j in range(len(self.COLUMN)):
            tmpRead = GPIO.input(self.COLUMN[j])
            if tmpRead == 1:
                colVal=j


        if colVal <0 or colVal >2:
            self.exit()
            return


        self.exit()
        return self.KEYPAD[rowVal][colVal]


    def exit(self):
        for i in range(len(self.ROW)):
                GPIO.setup(self.ROW[i], GPIO.IN, pull_up_down=GPIO.PUD_UP)

        for j in range(len(self.COLUMN)):
                GPIO.setup(self.COLUMN[j], GPIO.IN, pull_up_down=GPIO.PUD_UP)


while True:

    kp = keypad(columnCount = 3)

    def digit():
        r = None
        while r == None:
            r = kp.getKey()
        return r
    print "Please enter a 4 digit code: "

    d1 = digit()
    print d1
    sleep(1)


    d2 = digit()
    print d2
    sleep(1)


    d3 = digit()
    print d3
    sleep(1)


    d4 = digit()
    print d4
    sleep(1)

if ("%s%s%s%s"%(d1,d2,d3,d4) == "1234"):
        print "You Entered %s%s%s%s "%(d1,d2,d3,d4)
        print "Access granted unlocking......"
        GPIO.output("P8_32", GPIO.HIGH)
        sleep(5)
        GPIO.output("P8_32", GPIO.LOW)
        sleep(1)
        GPIO.cleanup()
    else:
        print "Access denied"
        print "You Entered %s%s%s%s "%(d1,d2,d3,d4)