Programming AVR micro controller using Atmel Studio 7

In this blog, we will learn how to upload hex file using Atmel Studio. Atmel Studio is used for programming ATtiny, ATmega and AVR32 mirocontrollers. You can download atmel studio from:

Download Atmel Studio

Open Atmel Sudio from windows start menu:

File > New Project >  GCC C executable project

In device selection, choose Atmega8a

In main.c write down the following program for toggling PORTD

#define F_CPU 8000000
#include<avr/io.h>
#include<util/delay.h>

int main(void)
{
	DDRD = 0xff;  // set portd as output
    while (1) 
    {
		PORTD = ~PORTD; // toggle PORTD bits
		_delay_ms(500); // delay of 500 ms
    }
}

Follow the steps as mentioned above n the screenshot. 

Once the code is successfully compiled, we are ready for the next step i.e. uploading the program to the target board.

Go to: Tools > External Tools > 

In arguments type this:

avrdude -c usbasp -p atmega8 -U flash:w:$(ProjectDir)Debug\$(TargetName).hex:i

since we are using atmega8.

Provide the path of avrdude in command. You can input USBasp in Title

Make connections as follows:

USBasp programmer                                                Atmega 8 target board

Vcc       ===========================>      Pin 7,20,21 

GND     ===========================>      Pin 8,22 

MOSI    ===========================>      Pin 11 

MISO    ===========================>      Pin 12 

SCK      ===========================>      Pin 13 

RST       ===========================>      Pin 1 

Now click on: Tools > USBasp

And voila your mcu is flashed!! 

Generating a delay of 1s using timer in atmega8

Hello Friends,

In this tutorial, we will learn how to generate a delay of 1second using timer0 in atmega8.

We are writing the code in Avr studio 4.

Timer 0 is a 8-bit timer means we can feed any value from 0 (0x00) to 255 (0xff)

Timing Diagram

In this example, we are using prescaler of value8. Prescaler divides the base frequency (provided by crystal or internal rc oscillator).

Machine Cycle = 1/Fosc      (Fosc is 8 MHz)

M.C = 1/8 us or 0.125 us

Delay = (256-x) * 0.125 * Pre scaler  (Pre scaler = 8)

Password protected system with AVR using DTMF

Password protected system using DTMF

Hello guys, this project is about password protected system using DTMF module. By using a predefined number we can make output either high or low by using the three digit code.
The codes can be changed in the program.

Components required:

• Atmega 16A
• USBasp programmer
• AVRdudes (for burning hex file)
• AVRStudio 4
• Compiler used: GCC
• DTMF module
• 3.5 mm audio jack

FOR OUTPUT LOW CODE IS str1="248"

FOR OUTPUT HIGH CODE IS str2="842"

Connections are as follows:

Q0-PD0

Q1-PD1

Q2-PD2

Q3-PD3

Output is from: PB0.

DIY arduino board

You can make your own arduino board provided you need a  programmer to upload programme on the board. We can make USBasp programmer from the previous post.
 
Arduino had lots of varities e.g. Arduino NG, Arduino Uno, Arduino Mega , etc.

We are going to use Arduino NG which uses Atmega8/Atmega168 or we can also use Arduino UNO which uses Atmega328.

We are using Arduino IDE 1.6.0 and we have to click on Tools>Programmer>USBasp

 Then we have to click on Tools>Boards>Arduino NG or older.