View source for Arduino/C3/AVR-GCC-programming-through-Arduino/English-timed


{|border=1
|  '''Time'''
|  '''Narration'''

|-
| 00:01
| Welcome to the''' Spoken Tutorial''' on''' AVR-GCC programming through Arduino.'''

|-
| 00:08
| In this tutorial, we will learn to: interface a''' seven segment display''' to''' Arduino board''',

|-
| 00:15
|  write an''' AVR-GCC''' program to display a digit on '''seven segment display '''and
display digits 0 to 9 on the '''seven segment display.'''

|-
| 00:27
| To follow this tutorial, you should have basic knowledge of :

|-
| 00:31
| electronics, 

|-
| 00:34
|  '''C Programming '''and  
'''AVR-GCC'''.

|-
| 00:39
| To record this tutorial, I am using: '''Arduino UNO Board '''and 
'''Ubuntu Linux operating system''' version 14.04.

|-
| 00:50
|  '''GCC '''stands for''' GNU Compiler Collection.'''

|-
| 00:54
|  It is a '''compiler''' which supports various programming languages.

|-
| 00:59
|  '''AVR-GCC '''is a part of '''GCC''' and supports compiling '''C programs''' for '''AVR microcontrollers.'''

|-
| 01:08
|  Since '''Arduino''' uses '''ATMEGA328P''', this is a suitable '''compiler'''. 

|-
| 01:15
| We also require some external devices such as: 
'''Seven-Segment Display''',

|-
| 01:22
| '''220 ohm Resistor''',

|-
| 01:26
| '''Breadboard''',

|-
| 01:28
| '''Arduino UNO Board''' and

'''Jumper Wires.'''

|-
| 01:33
| In this experiment, we will be using the '''common anode seven-segment display.'''

|-
| 01:39
|Please refer to the basic level tutorials of this series to know more about '''Seven segment display'''.

|-
| 01:46
| Refer the '''pin mapping''' for '''Arduino''' and '''microcontroller'''.

|-
| 01:51
| Do the circuit connection as shown here.

|-
| 01:55
|The '''Dot''' pin of the '''Seven Segment Display''' is connected to the '''pin 13''' of the '''Arduino'''. 

|-
| 02:02
|Any one of the '''common''' pins is connected to the '''+5 Volts''' through a '''resistor'''.

|-
| 02:09
| This is the live setup of the connection.

|-
| 02:12
| Now, we will write an '''AVR-GCC program''' to blink the '''Dot LED''' on the '''seven segment display'''.

|-
| 02:22
|  We need to install '''AVR-GCC assembler''' and an '''AVR-LIBC library'''.

|-
| 02:29
|  '''AVR-GCC''' will generate a '''hex''' file and upload it to '''Arduino board'''.

|-
| 02:35
|  '''AVR-LIBC '''contains the required '''library files''' that can be used in the program.

|-
| 02:42
| Open the '''terminal''' by pressing '''Ctrl + Alt + T''' keys together.

|-
| 02:48
| Type: '''sudo space apt hyphen get space install space avr hyphen libc space gcc hyphen avr '''

and press '''Enter'''.

|-
| 03:03
| Enter the '''administrative '''password if prompted and press '''Enter.'''

|-
| 03:09
| We can see the installation process has begun. 

|-
| 03:13
|Press ''''Y'''' wherever there is a prompt during installation to confirm the configuration.

|-
| 03:20
|Installation will take some time to complete depending upon the internet speed.

|-
| 03:26
| We can see that the installation has been completed successfully.

Let me clear the '''terminal'''.

|-
| 03:34
| Now, let us connect the''' Arduino board''' to the computer.

|-
| 03:38
| To check the '''port number '''of '''Arduino''', I will type: '''ls space forward slash dev forward slash ttyACM asterisk''' and press '''Enter'''.

|-
| 03:51
| We can see the output as shown. Here''' ttyACM0''' represents the '''port number '''of '''Arduino'''.

|-
| 04:00
|You may get a different '''port number'''. Make a note of your '''port number'''.

|-
| 04:06
| Download the file '''Makefile '''from the '''Code files''' link of this tutorial. 

|-
| 04:12
| '''Makefile''' enables us to create a ''' dot hex''' file and upload it to '''Arduino'''.

|-
| 04:19
| Save the '''Makefile''' in the folder where you will be saving the '''C''' program.

|-
| 04:24
| Let us write the''' avr-gcc''' program to blink the '''Dot LED''' and upload it to the '''microcontroller'''.

|-
| 04:32
| Open any '''text editor''' and type the following.

|-
| 04:36
| We have to include the '''libraries''' required for our program.

|-
| 04:41
| '''avr slash io dot h''' contains all the basic '''libraries''' required to perform the input and output operations.

|-
| 04:50
| '''util slash delay dot h''' contains the '''libraries''' for the '''delay function.'''

|-
| 04:56
| '''Arduino board''' has an '''LED''' at '''PB5'''. 

|-
| 05:00
| Set '''PB5''', that is '''pin 13 '''of '''Arduino '''as '''output'''.

|-
| 05:05
| Sending 0 to '''PB5''' turns '''on''' the '''LED.'''

|-
| 05:09
| Sending 1 to '''PB5''' turns '''off''' the '''LED'''.

|-
| 05:13
| These two steps will run in an infinite '''while loop''' making the '''LED''' blink.

|-
| 05:19
| '''Source code''' that are used in this tutorial are available in the '''Code Files''' link of this tutorial. 

You can download and use it.

|-
| 05:28
| I’ll save the code as '''dot hyphen blink dot c''' in the '''Downloads''' folder.

|-
| 05:37
| Switch to the '''terminal'''.

|-
| 05:39
| Go to the '''Downloads''' folder where '''dot hyphen blink dot c '''file is saved.

|-
| 05:45
| Type: '''make space FNAME in capital equals dot hyphen blink ''' and press '''Enter'''.

This '''command''' creates a ''' dot hex''' file and uploads it to the '''Arduino'''.

|-
| 06:00
| Now, you can see that the '''Dot''' '''LED''' in the '''seven segment''' is blinking.

|-
| 06:06
| Next, we will display digit '''2''' on the '''seven segment display.'''

|-
|06:11
| To display '2', '''a, b, d, e, g segments '''should be high and the other '''LEDS''' should be low.

|-
| 06:19
| '''Pins a, b, c, d, e, f '''and''' g '''of the '''seven segment display''' are connected to the '''pins 2, 3, 4, 5, 6, 7''' and '''8''' of the '''Arduino''' respectively.

|-
| 06:32
| The common '''pin''' is connected to '''+5 Volts''' through '''resistor'''.

|-
| 06:37
| Let us see the live connection setup.

|-
| 06:42
| Let us see the '''source code''' for this program.

|-
| 06:46
| Open any '''text editor''' and type the following code. 

|-
| 06:50
| The first two lines of the code in the ''''main' function''' set '''pins 2 '''to '''8 '''as '''output pins.'''

|-
|06:58
| The codes inside the '''while loop '''are used to control the state of the respective '''LEDs'''.

|-
| 07:05
| Sending '''0''' will cause the '''LED''' to glow and sending '''1''' will turn it off.

|-
| 07:11
| Save it as '''two.c '''file.

|-
| 07:15
| Switch back to the '''terminal'''.

Clear the '''terminal''' now.

|-
| 07:21
| Type: '''make space FNAME''' in capital '''equals two''' and press '''Enter'''.

|-
| 07:30
| Now you can see that the digit two in the '''seven segment''' is glowing.

|-
| 07:38
| Pause the tutorial and do the below assignment. Modify the above code to display any other digit from '''0 '''to''' 9'''.

|-
| 07:48
| Next, we will display the numbers 0 to 9 on the '''Seven Segment Display'''.

|-
| 07:54
| Setup remains the same.

|-
| 07:57
| Let us see the '''source code''' for this program. Open any text editor and type the following code.

|-
| 08:04
| The '''for loop''' is used to count from 0 to 9. 

Each time, the variable ''''i'''' is incremented by one and the value is passed to ''''sevenseg' function'''.

|-
| 08:16
| The ''''sevenseg' function '''receives an integer ranging from 0 to 9.

Based on the input, the '''case''' structure is executed.

|-
| 08:27
| Thus displaying the digits from '''0 '''to '''9'''.

|-
| 08:32
| Save it as '''counter.c '''file.

|-
| 08:36
| Switch back to the '''terminal''' and clear it.

|-
| 08:40
| Type: '''make space FNAME''' in capital '''equals counter''' and press '''Enter'''.

|-
| 08:50
| Now, we can see the digits '''0 '''to '''9 '''are displayed in the '''seven segment display'''.

|-
| 09:02
| This brings us to the end of this tutorial. Let us summarize.

|-
| 09:06
| In this tutorial, we learnt to interface a''' Seven-segment display''' to''' Arduino board, '''

|-
| 09:13
| write an''' AVR-GCC''' program to display a digit on '''seven-segment display '''and

|-
| 09:19
| display digits '''0 '''to '''9 '''on the '''Seven segment display.'''

|-
| 09:24
| The video at the following link summarizes the '''Spoken Tutorial''' project.

Please download and watch it.

|-
|  09:32
|  The''' Spoken Tutorial Project''' team conducts workshops and gives certificates.

For more details, please write to us.

|-
| 09:42
|  Please post your timed queries in this forum.

|-
| 09:46
| Spoken Tutorial project is funded by '''NMEICT, MHRD''', Government of India.

More information on this mission is available at this link.

|-
| 09:56
| This tutorial has been contributed by '''FOSSEE''' and '''Spoken Tutorial Project, IIT Bombay'''. 

This is Priya from '''IIT Bombay'''. Thanks for joining.

|}