101 lines
3.4 KiB
Markdown
101 lines
3.4 KiB
Markdown
|
---
|
||
|
layout: post
|
||
|
title: "Getting started with RTEMS on Archlinux"
|
||
|
date: 2013-05-28 21:24
|
||
|
comments: true
|
||
|
categories:
|
||
|
- RTEMS
|
||
|
- GSoC
|
||
|
- Archlinux
|
||
|
---
|
||
|
|
||
|
The default RTEMS geting started does not cover the toolchain setup as it should be. It either redirects the user to download a ~1 GB distro or some pretty old RPMs. This shouldn't be like this.
|
||
|
|
||
|
There is an excellent tool called ***rtems source builder*** which can help a newbie setup RTEMS environment in a brisk. This post is the authors journal about how he did it, shared beacuse it might be beneficial to people looking to bootstrap RTEMS.
|
||
|
|
||
|
RTEMS is a real time operating system. It works on various type of hardware, and a devlopment setup is specific to the hardware of developers choice. Here I will demonstrate setting up a sparc toolchain with b-sis simulator.
|
||
|
|
||
|
### Setting up toolchain
|
||
|
First step of our RTEMS journey. A toolchain consists of a compiler, linker, debuggger and a simulator for the hardware. We need these tools to compile the RTEMS code and execute our programs.
|
||
|
|
||
|
This was a painful step in past. Cross compiler environments are nasty to get right. But dont worry, we have our wonderful rtems-source-builder to rescue.
|
||
|
|
||
|
rtems-source-builder automates the task of setting up this toolchain - it downloads the source files, builds them and installs in the system. It also have the option to make a tarball.
|
||
|
|
||
|
The actuall steps are documented here - [rtems-source-builder documentation][1], but if you prefer a capsule
|
||
|
|
||
|
- Setup directories and get source
|
||
|
```
|
||
|
$ cd
|
||
|
$ mkdir -p development/rtems/src
|
||
|
$ cd development/rtems/src
|
||
|
$ git clone git://git.rtems.org/rtems-source-builder.git
|
||
|
$ cd rtems-source-builder
|
||
|
```
|
||
|
- Check environment.
|
||
|
```
|
||
|
$ ./source-builder/sb-check
|
||
|
RTEMS Source Builder environment is ok
|
||
|
```
|
||
|
|
||
|
- Build a sparc target
|
||
|
```
|
||
|
$ cd rtems
|
||
|
$ ../source-builder/sb-set-builder --log=l-sparc.txt /
|
||
|
--prefix=$HOME/development/rtems/4.11 4.11/rtems-sparc
|
||
|
```
|
||
|
this will produce binaries in `$HOME/development/rtems/4.11` directory.
|
||
|
|
||
|
__Note__: Default version of makeinfo in archlinux is incomaptible with tools we build, source-builder documentations says
|
||
|
|
||
|
>Archlinux, by default installs texinfo-5 which is incompatible for building GCC 4.7 tree. You will have to obtain texinfo-legacy from AUR and provide a manual override.
|
||
|
|
||
|
```
|
||
|
# pacman -R texinfo
|
||
|
$ yaourt -S texinfo-legacy
|
||
|
# ln -s /usr/bin/makeinfo-4.13a /usr/bin/makeinfo
|
||
|
```
|
||
|
|
||
|
### Building RTEMS
|
||
|
- First obtain the RTEMS code from github.
|
||
|
```
|
||
|
$ cd
|
||
|
$ mkdir -p development/rtems/repo
|
||
|
$ cd development/rtems/repo
|
||
|
$ git clone git@github.com:RTEMS/rtems.git
|
||
|
$ cd rtems
|
||
|
```
|
||
|
|
||
|
- Bootstrap the rtems and build code.
|
||
|
```
|
||
|
$ export PATH=/home/dhananjay/build/rtems/4.11/bin:$PATH
|
||
|
$ ./bootstrap
|
||
|
```
|
||
|
|
||
|
- Build a b-sis simulator code.
|
||
|
```
|
||
|
$ cd ..
|
||
|
$ mkdir b-sis && cd b-sis
|
||
|
$ ../rtems/configure --target=sparc-rtems4.11 --enable-rtemsbsp=sis --enable-tests=samples --enable-posix --prefix=/home/dhananjay/build/rtems/src/
|
||
|
$ make
|
||
|
```
|
||
|
|
||
|
### Running example code.
|
||
|
- Find the sample applications and execute them.
|
||
|
|
||
|
```
|
||
|
$ cd sparc-rtems4.11/c/sis/testsuites/samples/hello
|
||
|
$ ls
|
||
|
|
||
|
hello.exe hello.num hello.ralf init.o Makefile
|
||
|
$ sparc-rtems4.11-run hello.exe
|
||
|
|
||
|
*** GSOC HELLO WORLD TEST ***
|
||
|
Hello RTEMS World
|
||
|
Dhananjay Balan
|
||
|
*** END OF HELLO WORLD TEST ***
|
||
|
```
|
||
|
*Update*: Newer versions of RSB builds RTEMS automatically, no manual intervention needed. You can skip this step altogether.
|
||
|
|
||
|
[1]: http://www.rtems.org/ftp/pub/rtems/people/chrisj/source-builder/source-builder.html "rtems-source-builder documentation"
|