Neil: moved Bare metal to Overo Bare Metal

2012-09-21T23:30:17Z

Neil: Created page with "==Setup the cross compiling environment== The one I used is Sourcery CodeBench Lite Edition, you can get it from [http://www.mentor.com/embedded-software/sourcery-tools/sourcery-..."

2012-09-21T23:29:44Z

Created page with "==Setup the cross compiling environment== The one I used is Sourcery CodeBench Lite Edition, you can get it from [http://www.mentor.com/embedded-software/sourcery-tools/sourcery-..."

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==Setup the cross compiling environment==
The one I used is Sourcery CodeBench Lite Edition, you can get it from [http://www.mentor.com/embedded-software/sourcery-tools/sourcery-codebench/editions/lite-edition/ its website]. 
Please choose the eabi verison and the tar.bz2 one. 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 programs have been tested on an overo. 
You can get source files from [https://github.com/zhaoruibing/overo-bare-metal-hello-world here].

==Compile the program==
Assembly verison:
$ cd asm/
Use make to compile the asm program 
$ make
C version:
$ cd c/
Run the compile file in c program folder 
$ sh compile
==Run the program==
You needed a flashed, bootable MicroSD. You can make one by using Sakoman's scripts ([http://www.sakoman.com/downloads.html mkcard.sh and mksdcard.sh]). 
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 to interrupt. 
And run:
# mmc list
# mmc part
# fatls mmc 0:1
# fatload mmc 0:1 0x80200000 boot.bin
# go 0x80200000

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

==References==

'''Code used:''' 
:The Hello World C code is from: 
:http://balau82.wordpress.com/2010/02/28/hello-world-for-bare-metal-arm-using-qemu/ 
:The commands used in serial console are from: 
:http://gumstix.8.n6.nabble.com/Running-program-on-bare-metal-Overo-td4965440.html 
:The code used in Hello World is modified from: 
:The Definitive Guide to the ARM Cortex-M3 P172-174 

'''Cross compiling tool used:''' 
:http://www.mentor.com/embedded-software/sourcery-tools/sourcery-codebench/editions/lite-edition/ 

'''Manuals:''' 
:Uboot: 
:http://www.denx.de/wiki/view/DULG/Manual 
:Linker script: 
:http://sourceware.org/binutils/docs/ld/Scripts.html#Scripts 
:ftp://ftp.gnu.org/old-gnu/Manuals/ld-2.9.1/html_mono/ld.html 
:Compiler: 
:http://gcc.gnu.org/onlinedocs/gcc/ARM-Options.html 

'''Futher readings:''' 
:http://stackoverflow.com/questions/6870712/beagleboard-bare-metal-programming 
:http://wiki.osdev.org/Beagleboard 
:Building Bare-Metal ARM Systems with GNU
'''TRM(Technical Reference Manuals):''' 
:TI OMAP35x Applications Processor Technical Reference Manual 
:ARM Architecture Reference Manual 
:ARM Assembly Language Tools User's Guide 
:RealView Platform Baseboard for Cortex-A8 User Guide

← Older revision	Revision as of 23:30, 21 September 2012
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Overo Bare Metal - Revision history

Neil: moved Bare metal to Overo Bare Metal

Neil: Created page with "==Setup the cross compiling environment== The one I used is Sourcery CodeBench Lite Edition, you can get it from [http://www.mentor.com/embedded-software/sourcery-tools/sourcery-..."