HelloWorld

2009-04-26T07:59:57Z

AlainP: /* Compilation */

On this page you will learn how to create your first C application for your Armadeus board

==Source code==
First take your favorite editor/IDE and create the following program:

<source lang="c">
#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[])
{
printf( "APF9328 says: Hello World ! ;-)\n" );
exit(0);
}
</source>

Save it as hello.c

==Compilation==
The C cross compiler is installed in ''armadeus/buildroot/build_armv4t/staging_dir/bin/'' and is named ''arm-linux-gcc''
There are 2 possibilities to use it:
* either add ''armadeus/buildroot/build_armv4t/staging_dir/usr/bin/'' to your ''PATH'' environment variable and then call ''arm-linux-gcc'' instead of ''gcc''
* or call directly ''armadeus/buildroot/build_armv4t/staging_dir/usr/bin/arm-linux-gcc''

So to compile your small program do (here hello.c was saved in armadeus/target/demos/ directory):
[host demos]$ ../../buildroot/build_armv4t/staging_dir/usr/bin/arm-linux-gcc -mcpu=arm920t -o hello hello.c

==Running==
Copy your ''hello'' executable on your board either through TFTP or NFS
===TFTP===
Be sure to have TFTP server installed, [[Connection_with_U-Boot_on_Linux#TFTP_server| if not it's explained here]]<br>
Copy ''hello'' to TFTP directory:
[host demos]$ cp hello /tftpboot/
Load your executable on the target (here my host IP is 192.168.0.2):
# tftp -g -r hello -l /usr/bin/hello 192.168.0.2
Give it executable rights, if lost during TFTP transfer:
# chmod a+x /usr/bin/hello
Launch it:
# /usr/bin/hello
APF9328 says: Hello World ! ;-)
#

Now it's up to you ! ;-)

===NFS===
Be sure to have NFS server installed, [[Network_Configuration| if not it's explained here]]<br>
I assume that your NFS drive is accessible from ''/mnt/host''
Launch your prog:
[target]# /mnt/host/hello

==Putting it all together in a Makefile==
You can put your program compiling and copying in a ''Makefile'' to make things cleaner:
CC=arm-linux-gcc
CFLAGS=-W -Wall
LDFLAGS=
EXEC=hello
SRC= $(wildcard *.c)
OBJ= $(SRC:.c=.o)

all: $(EXEC)

hello: $(OBJ)
$(CC) -o $@ $^ $(LDFLAGS)

%.o: %.c
$(CC) -o $@ -c $< $(CFLAGS)

.PHONY: clean install

clean:
rm -rf *.o
rm -f $(EXEC)

install: all
cp -f $(EXEC) /tftpboot/

'''!! If you do a cut & paste with previous commands, don't forget to check TABS for each target (Makefiles are using TABS and not SPACES) !! In that case make will complains about a missing separator line 11'''

Then, just do:
[host demos]$ make clean install

==Links==
* [http://www.handhelds.org/minihowto/porting-software.html Things to know when porting x86 software to ARM]
* [http://gl.developpez.com/tutoriel/outil/makefile/ Les Makefiles, comment ça marche ?]
* [http://www.advancedlinuxprogramming-fr.org/doku.php Livre en ligne: Programmation Linux Avancée]

{{LanguageBar|HelloWorld|HelloWorld|HelloWorld}}

[[Category:Software]]
[[Category:Programming language]]

Virtualbox 2.1.0 Ubuntu 8.04 guest Windows Host

2009-01-03T22:23:26Z

AlainP: New page: Under construction

Under construction

Project Management

2009-01-03T22:17:38Z

AlainP: /* Software */

Ben va falloir s'y mettre cette fois ! ;-)

==Work in progress==
===Software===
* [[Fr:Integration ipkg | ipkg integration]] (French) -> contact JulienB / artemys
* Article for GNU Linux Magazine France (French): will explain how to use touchscreen and alsa in embedded devices -> contact JulienB / artemys
* Domotic application's base elements definitions -> [[Domos_Project]]
* Support for other build systems (like Scratchbox) -> contact JiBee
* [[Linux 2.6.24 integration | Integration of Linux 2.6.24 kernel]] -> contact JulienB / artemys
* [[Linux 2.6.27 integration | Integration of Linux 2.6.27 kernel]] -> contact JulienB / Jorasse
* [[EFL | Enlightment]] -> contact JulienN / jujun
* [[buildroot-20081103 integration]] -> contact Jorasse/JulienB
* [[u-boot-1.3.4 integration]] -> contact Jorasse
* [[Armadeus Integration Test]] -> contact Jorasse
* [[Armadeus 3]]
* [[Virtualbox 2.1.0 Ubuntu 8.04 guest Windows Host]]-> contact Alarm

===Hardware===
* IR Receiver IP for FPGA -> contact benoit
* CMOS capter integration -> contact JulienB

==Recently released==
===Armadeus release 2.2/2.3===
* [[buildroot-20071027 integration]] -> contact Jorasse
* [[Linux 2.6.23 integration | Update to Linux 2.6.23 kernel]] -> contact JulienB

ArmadeusWiki - User contributions [en]

HelloWorld

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