Raspberry Pi C program for three LED

/*

 * blink.c:

 * Standard "blink" program in wiringPi. Blinks an LED connected

 * to the first GPIO pin.

 *

 * Copyright (c) 2012-2013 Gordon Henderson. <projects@drogon.net>

 ***********************************************************************

 * This file is part of wiringPi:

 * https://projects.drogon.net/raspberry-pi/wiringpi/

 *

 *    wiringPi is free software: you can redistribute it and/or modify

 *    it under the terms of the GNU Lesser General Public License as published by

 *    the Free Software Foundation, either version 3 of the License, or

 *    (at your option) any later version.

 *

 *    wiringPi is distributed in the hope that it will be useful,

 *    but WITHOUT ANY WARRANTY; without even the implied warranty of

 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *    GNU Lesser General Public License for more details.

 *

 *    You should have received a copy of the GNU Lesser General Public License

 *    along with wiringPi.  If not, see <http://www.gnu.org/licenses/>.

 ***********************************************************************

 */

#include <stdio.h>

#include <wiringPi.h>

// LED Pin - wiringPi pin 0 is BCM_GPIO 17.

#define LED0 0

#define LED1    1

#define LED2    2

int main (void)

{

 int i;

  printf ("Raspberry Pi blink 10 times\n") ;

  wiringPiSetup () ;

  pinMode (LED0, OUTPUT) ;

  pinMode (LED1, OUTPUT) ;

  pinMode (LED2, OUTPUT) ;

  for (i=1;i<10;i++)

  {

    digitalWrite (LED1, LOW) ;  // Off

    digitalWrite (LED0, HIGH) ; // On

    delay (50) ; // mS

    digitalWrite (LED0, LOW) ; // Off

    digitalWrite (LED1, HIGH) ; // On

    delay (50) ;               // mS

    digitalWrite (LED1, LOW) ;  // Off

    digitalWrite (LED2, HIGH) ; // On

    delay (50) ;               // mS

    digitalWrite (LED2, LOW) ;  // Off

    digitalWrite (LED1, HIGH) ; // On

    delay (50) ;

  }

    digitalWrite (LED1, LOW) ;  // Off

  return 0 ;

}

tkinter python3

Raspberry Pi 

Python3 

Tcl 8.6

26pin GPIO 

GPIO BCM 17,18 and 27

 ## Toggle an LED when the GUI button is pressed ##

# Use only RPi.GPIO to avoid spurious errors

from tkinter import *

import tkinter.font

import RPi.GPIO as GPIO

GPIO.setmode(GPIO.BCM)

### HARDWARE DEFINITIONS ###

led0=17

led1=18

led2=27

GPIO.setup(led0,GPIO.OUT)

GPIO.output(led0, False)

GPIO.setup(led1,GPIO.OUT)

GPIO.output(led1, False)

GPIO.setup(led2,GPIO.OUT)

GPIO.output(led2, False)

### GUI DEFINITIONS ###

win = Tk()

win.title("LED Toggler")

myFont = tkinter.font.Font(family = 'Helvetica', size = 12, weight = "bold")

### Event Functions ###

def redledToggle():

    if GPIO.input(led0):

        GPIO.output(led0, False)

        ledButton["text"]="RED on" # Change only the button text property

    else:

        GPIO.output(led0, True)

        ledButton["text"]="RED off"

        

def greenledToggle():

    if GPIO.input(led1):

        GPIO.output(led1, False)

        led1Button["text"]="GREEN on" # Change only the button text property

    else:

        GPIO.output(led1, True)

        led1Button["text"]="GREEN off"

def blueledToggle():

    if GPIO.input(led2):

        GPIO.output(led2, False)

        led2Button["text"]="BLUE on" # Change only the button text property

    else:

        GPIO.output(led2, True)

        led2Button["text"]="BLUE off"

        

def close():

    GPIO.cleanup()

    win.destroy()

### WIDGETS ###

# Button, triggers the connected command when it is pressed

ledButton = Button(win, text='RED on', command=redledToggle, bg='bisque2', height=3, width=24)

ledButton.grid(row=0,column=1)

led1Button = Button(win, text='GREEN on', command=greenledToggle, bg='bisque2', height=3, width=24)

led1Button.grid(row=2,column=1)

led2Button = Button(win, text='BLUE on', command=blueledToggle, bg='bisque2', height=3, width=24)

led2Button.grid(row=4,column=1)

exitButton = Button(win, text='Exit', command=close, bg='red', height=1, width=6)

exitButton.grid(row=6, column=1)

win.protocol("WM_DELETE_WINDOW", close) # cleanup GPIO when user closes window

win.mainloop() # Loops forever