Difference between revisions of "Switch and a LED with AVR"

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In this tutorial, we will interface a simple switch and a LED with AVR Micrcontroller.
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[[User:Guru|Guru]] ([[User talk:Guru|talk]]) 14:35, 7 November 2015 (IST)
 +
----
 
[[Category:AVR Tutorials]]
 
[[Category:AVR Tutorials]]
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<html>
 +
<title>The Rock (1996)</title>
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<meta property="og:title" content="The Rock" />
 +
<meta property="og:type" content="video.movie" />
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<meta property="og:url" content="http://www.imdb.com/title/tt0117500/" />
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<meta property="og:image" content="http://ia.media-imdb.com/images/rock.jpg" />
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</html>
 +
We will interface a DIP switch to one of the port pins and LED's to other port pins.
 +
 +
 +
=Hookup=
 +
You may look this up with the simple breadboard as shown in section below or you could use the Ultra AVR dev kit if do not wish to jumble with wires and resistors.
 +
==Type 1:Breadboard with Explore AVR 40 Pin Breakout Board with Atmega32==
 +
===Components Used===
 +
 +
{| class="wikitable"
 +
|-
 +
| 1||
 +
<html><img src ="https://www.exploreembedded.com/blog/wp-content/uploads/img-collections/avr-mcu-breakout/1-dsc02958.jpg" width="300 px"></html>
 +
 +
|| AVR 40 pin breakout board with Atmega32<br />
 +
[https://www.exploreembedded.com/product/AVR%2040%20Pin%20Breakout%20Board%20with%20Atmega32 Click here to buy from our store]
 +
|-
 +
|2||
 +
<html><img src ="https://www.exploreembedded.com/blog/wp-content/uploads/img-collections/breadboard-large/breadboard_large.jpg" width="300 px"></html>
 +
 +
|| Breadboard <br />
 +
[https://www.exploreembedded.com/product/Large%20Breadboard Click here to buy from our store]
 +
|-
 +
| 3||
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<html><img src ="https://www.exploreembedded.com/blog/wp-content/uploads/img-collections/male-to-male-jumper-wires-pack-of-40/1-dsc04497.jpg" width="300 px"></html>
 +
 +
|| Male to Male Jumper Wires <br />
 +
[https://www.exploreembedded.com/product/Male%20to%20Male%20Jumper%20Wires%20-%20Pack%20of%2040 Click here to buy from our store]
 +
|-
 +
 +
| 4||
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<html><img src ="https://www.exploreembedded.com/blog/wp-content/uploads/img-collections/led-5mm-red/5mm_red_led.jpg" width="300 px"></html>
 +
|| LED - 5mm RED <br />
 +
[https://www.exploreembedded.com/product/LED%20-%205mm%20RED Click here to buy from our store]
 +
|-
 +
 +
| 5||
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<html><img src ="https://www.exploreembedded.com/blog/wp-content/uploads/img-collections/resistor/3_resistors.jpg" width="300 px"></html>
 +
|| Resistor <br />
 +
[https://www.exploreembedded.com/product/10K%20ohm%20Resistor Click here to buy from our store]
 +
|-
 +
 +
|| 6||
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<html><img src ="https://www.exploreembedded.com/blog/wp-content/uploads/img-collections/dip-switche-8-position/8-way-dip-switch.jpg" width="300 px"></html>
 +
|| DIP Switch - 8 Position <br />
 +
[https://www.exploreembedded.com/product/DIP%20Switch%20-%208%20Position Click here to buy from our store]
 +
|}
 +
 +
 +
==Wiring diagram==
 +
<html><img src ="https://www.exploreembedded.com/blog/wp-content/uploads/img-collections/fritzing-tutorials_de69ccc2/switch_breadboard_bb.png" width="670 px"></html>
 +
 +
==Type 2:Using Explore Ultra AVR Dev Kit==
 +
===Components Used===
 +
The Explore Ultra AVR Kit comes with all the things required, not just for this experiment but for the entire series. And even if you think of migrating to PIC or Arduino, you'll have breakout boards that fit on to this, hence we believe it is a great investment for learning hands on Embedded Systems. The kit is fully open source, you may use the schematics, the design files and all of the source code and build something cool on your own. And when you do that do not forget to share with us what you've done. We would be happy to see you building something cool.
 +
 +
<html>
 +
<ul>
 +
<li>Explore Ultra AVR Dev Kit: <a https://www.exploreembedded.com/product/Explore%20Ultra%20AVR%20Dev%20Kit> Buy from EE Store </a></li>
 +
<a href="https://www.exploreembedded.com/product/Explore%20Ultra%20AVR%20Dev%20Kit">
 +
<img src ="https://www.exploreembedded.com/blog/wp-content/uploads/img-collections/explore-avr-pic-kit/1-dsc03897.jpg" width="480 px">
 +
</a>
 +
</ul>
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</html>
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 +
<html><img src ="https://www.exploreembedded.com/blog/wp-content/uploads/img-collections/fritzing-tutorials_de69ccc2/switch_bb.png" width="670 px"></html>
  
 
=Code=
 
=Code=
 
<syntaxhighlight>
 
<syntaxhighlight>
−
#include <avr/io.h>
 
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#define SW 0 
 
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#define LED 1
 
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int main(void)
 
−
{   
 
−
  DDRB &= ~(1<<SW);  //switch as input
 
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  DDRB |= (1<<LED); //led as output 
 
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  while(1)
 
−
  {
 
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  if ((PINB&(1<<SW)) == 1)
 
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  PORTB |= (1<<LED);
 
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  PORTB &= ~ (1<<LED);
 
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  }
 
−
}
 
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</syntaxhighlight>
 
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[http://exploreembedded.com/wiki/images/b/be/Schematic_AVR_Interfacing_Switches_%26_LEDS.pdf '''Schematic''']
 
  
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[[File:Schematic AVR Interfacing Switches & LEDS.JPG|680px]]
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/*-----------------------------------------------------------------------------
 +
                Program to demonstrate Switches and Leds
 +
  -----------------------------------------------------------------------------
 +
 +
note:  
 +
1.Leds are  connected to PORTC
 +
2.Switches are connected to PORTA
 +
 
 +
------------------------------------------------------------------------------*/
 +
 
 +
 
 +
/*contains the definition of all ports and SFRs */
 +
#include <avr\io.h>
 +
#include "stdutils.h"
 +
 
 +
#define Switches PINA
 +
#define LEDs PORTC
 +
 
 +
/* start the main program */
 +
void main()
 +
{
 +
  unsigned char SwitchData;
 +
 
 +
  /*Configure the PORTA as I/p to read the switch data */
 +
  DDRC = C_PortOutput_U8;
 +
  DDRA = C_PortInput_U8;
 +
 
 +
  while(1)
 +
    {
 +
 
 +
  /*Read the switch position */
 +
  SwitchData =  Switches;
 +
 +
/*Turn on the respective led depending on Switch position */
 +
  LEDs=SwitchData;
 +
  }
 +
  }
 +
</syntaxhighlight>
  
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'''Code and Explanation will be updated soon..'''
+
=Video Tutorial=
 +
For those of you, who would like to watch instead of read we have made a video with all the gyan.
 +
<br>
 +
{{#ev:youtubehd|-lNAmSNV2-Q|640}}

Revision as of 14:35, 7 November 2015

Guru (talk) 14:35, 7 November 2015 (IST)

The Rock (1996) We will interface a DIP switch to one of the port pins and LED's to other port pins.


Hookup

You may look this up with the simple breadboard as shown in section below or you could use the Ultra AVR dev kit if do not wish to jumble with wires and resistors.

Type 1:Breadboard with Explore AVR 40 Pin Breakout Board with Atmega32

Components Used

1

AVR 40 pin breakout board with Atmega32

Click here to buy from our store

2

Breadboard

Click here to buy from our store

3

Male to Male Jumper Wires

Click here to buy from our store

4

LED - 5mm RED

Click here to buy from our store

5

Resistor

Click here to buy from our store

6

DIP Switch - 8 Position

Click here to buy from our store


Wiring diagram

Type 2:Using Explore Ultra AVR Dev Kit

Components Used

The Explore Ultra AVR Kit comes with all the things required, not just for this experiment but for the entire series. And even if you think of migrating to PIC or Arduino, you'll have breakout boards that fit on to this, hence we believe it is a great investment for learning hands on Embedded Systems. The kit is fully open source, you may use the schematics, the design files and all of the source code and build something cool on your own. And when you do that do not forget to share with us what you've done. We would be happy to see you building something cool.

Code

/*-----------------------------------------------------------------------------
                 Program to demonstrate Switches and Leds
  -----------------------------------------------------------------------------
 
note: 
1.Leds are  connected to PORTC
2.Switches are connected to PORTA
 
------------------------------------------------------------------------------*/
 
 
/*contains the definition of all ports and SFRs */
#include <avr\io.h>
#include "stdutils.h"
 
#define Switches PINA
#define LEDs PORTC
 
/* start the main program */
void main() 
{
   unsigned char SwitchData;
 
  /*Configure the PORTA as I/p to read the switch data */ 
   DDRC = C_PortOutput_U8;
   DDRA = C_PortInput_U8;
 
  while(1)
    {
 
	  /*Read the switch position */ 
	   SwitchData =  Switches; 
 
	 /*Turn on the respective led depending on Switch position */ 
	   LEDs=SwitchData;
	  }
  }

Video Tutorial

For those of you, who would like to watch instead of read we have made a video with all the gyan.

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