Classes >>embedded programming

STEP 1: INSTALLNG THE PROGRAMS

For this task I choose 2 programs to work

AVR Studio 5 following the tutorial http://fab.cba.mit.edu/classes/MAS.863/people/prashant.patil/ep.html.

and Arduino following the tutorial http://academy.cba.mit.edu/2012/labs/providence/tutorials/09.html which was proposed by Anna Kaziunas France - Providence and thanks for that.

STEP 2: PROGRAMING WITH AVR Studio 5


Just in according with the tutorial first we must to dowload the (AVR Studio program)

Using the C programming language, the AVR program allowed me to set my microprocessor Hello World

The following figure I respected the initial port board design (A7 for the led and resistor and B2 for the switch button) which let me to run the program but unsuccessfully when connecting the AVR ISP2 with the board

 

 

 

THE INITIAL PROGRAM

int main(void)

{
DDRA=(1<<DDA7);
DDRB=(0<<DDB2);
PORTB=(1<<PORTB2);
while(1)
{if(PINB & (1<<PORTB2))
(0<<PORTA7)||(0<<PORTB2);
else
(1<<PORTA7)||(1<<PORTB2);
//TODO:: Please write your application code
}
}

 

THE MODIFIED PROGRAM
int main(void)

{
DDRA=(0<<DDA3);
DDRA=(1<<DDA7);
PORTA=(1<<PORTA3);
while(1)
{if(PINA & (1<<PORTA3))
(0<<PORTA7)||(0<<PORTA3);
else
(1<<PORTA7)||(1<<PORTA3);
//TODO:: Please write your application code
}
}

 

STEP 3: PROGRAMNG WITH ARDUINO IDE

On the left you can see the old design of my echo Hello World with the switch button on the B2 port. With this design it was impossible to succeed in the programming of the microprocessor.

I had to change the design of my board as showed on the right picture. To get it on my last board I made a jumper wire to connect A3 port intead B2 port but it is clear that it is not the best way, really it is necesary to build another board

 

I tried to follow the tutorial for Arduino 1.0 and after download it we need to:

Download the ATtiny.zip and FTDI drivers

Create a folder "hardware" in the Arduino sketch folder and copy inside the ATtiny folder

Check for ATtiny entries in the Tools menu

Make the connection between the fabISP programmer and the HELLO WORLD board with a ftdi wire, the miniUSB from the fabISP and the computer and finally the FTDI connector from the HELLO WORLD board and the computer

Select the "ATtiny44(external 20 Mhz clock) from the tools menu

Run "Burn Bootloader"

 

 

Once we had installed the Arduino we have to set:
The "Attiny44 ( 20MHz )from the Menu "tool/board"
The correct port from the Menu "tool/SerialPort" . Cheking device manager in "Ports Com"
Select the "usbtiny from "Menu "tool/programmer"
"Burn Bootloader"

 

 

    Here it is the original boad with the jump wire to change the ports. Bellow, the picture on the left show the failed intention of programming the original board

    On the right, and by using the newly modified board I had success in the programming

Like the previous task, this was a great experience and challenge where I hope to get more skills with the aim of my final project.

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