Programming MK AVR in Ubuntu OS. Encyclopedia of radio electronics and electrical engineering

Encyclopedia of radio electronics and electrical engineering / Microcontrollers

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I put myself such an OS - Ubuntu 9.04. Of course, you can’t really play with toys in it, it’s basically only for work.

Well, I decided to try programming AVR controllers in it.

On the Internet, in principle, there are a lot of all sorts of things that will help in mastering AVR programming under Linux.

But as usual, I was faced with the fact that a lot of things, well, nothing really. Everywhere it is advised to install Eclipse or KontrollerLab (as it got me).

Well, you certainly guessed that something went wrong with me with them as we would like. In general, by the method of guesswork and highly intelligent poke, I began to experiment. And here's what I came up with...

Open the Sinaptic package manager and type gcc-avr in the search box. We mark to install gcc-avr, avr-libc, avrdude.

You can of course do it like this:

$sudo apt-get install gcc-avr avr-libc avrdude

Well, to start, everything that is needed seems to be installed.

Next, create a folder called AVR in the root of the system (folder path: /AVR)
As an editor, you can use nano (in the terminal we prescribe nano),
but I used the usual text editor gedit (in the terminal we write $ sudo gedit)
In it we will write our code, for example:

#include

#include
#include
int main (void)
{
DDRx=0xFF;
while (1)
{
PORTx=0xff;
_delay_ms(100);
PORTx=0x00;
_delay_ms(100);
}
}

Next, save our text with the main.c extension in the AVR folder (file path: /AVR/main.c).

Now let's move on to compiling the code.
Let's start the terminal and write the following code:

$avr-gcc -mmcu=atmega8 -I. -gdwarf-2 -DF_CPU=8000000UL -Os -o /AVR/main.o /AVR/main.c

I searched for the right line for a long time, in the end I just took it from WinAvr :).

avr-gcc - compiler, -mmcu=our controller (currently atmega8), -DF_CPU=clock frequency in Hz, -Os-code optimizer, -o-OUT, /AVR/main.o-output file with extension .o which we get from .c, /AVR/main.c is our si file.

Do not forget to work as root, otherwise the system will not let you.

Enter and if we go to our /AVR directory, we will see a file with the .o extension.

Next, in the terminal (aka console), enter:
$avr-objcopy -O ihex /AVR/main.o /AVR/main.hex

Well, I won’t explain for a long time, I’ll just say that we are moving our main file from main.o to main.hex.

Well, our firmware is ready to be uploaded to our ATmega8.

Of course, we need a programmer.

We will use the programmer stk500v2 by Petka (It works just fine, fills it instantly, does not fall off the port, though I used it instead of the FT232 CP2102. Thank you so much for the schematic and firmware.)

Let's open the terminal and run the avrdude utility, which will work for us under the console:

$avrdude -c stk500v2 -pm8 -P /dev/ttyUSB0 -U flash:w:/AVR/main.hex

In the end, everything worked out!

Of course, the program was flooded with another one and its volume was 5 kB, but it was filled in less than 4 seconds.
As you know, there are also GUI shells for avrdude, but this is a completely different story that I will tell in another article. :)

PS With AVR910 they say that it works fine, but I haven't tried it myself.

Author: Efimov Valentin; Publication: cxem.net

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