Procedure for GPIO programing in Raspberry pi #4

Welcome Amigos' !!!!

Hope you have completed the configuration stage.

Now lets code our first ***

Step1:Create a separate directory to mange all the program we do using the terminal command

>> mkdir myprograms

Step2: Now get into the created folder
>> cd myprograms

Step3: To create a first program type
>> sudo nano myfirst.py

+ In this sudo indicates "SUPER USER" so the command mention will be used with administrator            permission.
+ nano is the command to create new files.
+ myfirst.py is the name of my first program with extension .py, since it is a python program.

 Step4:   Lets begin!!!  please see the syntax below before going for actual program

import RPi.GPIO as GPIO     # importing GPIO module- remember that this is case sensitive
import time                             # Importing Time module

GPIO.setmode(GPIO.BOARD) #  you can use this if you want to use pi's direct pin numbers
    or
GPIO.setmode(GPIO.BCM)  # you can use this, if you want to use the CPU pin numbering

(sometimes there will be a need for switching modes, there we can make use of this)
GPIO.setup(channel, GPIO.IN)  # to set the input channel

GPIO.setup(channel, GPIO.OUT) # to set the output channel

GPIO.cleanup()  # this line will refresh and reset the system by removing imported modules,                                              consider this as a good programming style

see you
---
Arun