Category:BareMetal

Setup the cross compiling environment

The one I used is Sourcery CodeBench Lite Edition, you can get it from its website.(http://www.mentor.com/embedded-software/sourcery-tools/sourcery-codebench/editions/lite-edition/) Please choose the eabi verison and format tar.bz2(This is what I used arm-2008q3-72-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2) Untar the file

mkdir ~/overo-standalone
cd ~/overo-standalone
tar xvjf arm-2008q3-72-arm-none-linux-gnueabi-i686-pc-linux-gnu.tar.bz2

Add the bin to your PATH

export PATH=$PATH:~/overo-standalone/arm-2008q3/bin

Write the program

The following two Hello World program has been tested on an overo You have test with them

Compile the program

Get into the desired folder

cd c/ or  cd asm/

Run the compile files in c program folder

sh compile

Use make to compile the asm program

make

Run the program

You needed a flashed, bootable MicroSD. You can make one by using Sakoman's scripts (mkcard.sh and mksdcard.sh from http://www.sakoman.com/downloads.html) Copy the .bin file generated by the compiler to the boot drive on the SD card

cp *.bin /media/boot/

Umount the SD card

umount /media/boot
umount /media/rootfs

Plug the SD card in overo and connect the overo on a Tobi expansion board Power it up and go into serial console When the console prompt "Hit any key to stop autoboot", please hit any key

mmc list
mmc part
fatls mmc 0:1
fatload mmc 0:1 0x80200000 uimage
go 0x80200000

By now you should see "Hello world!" poping in the console