RaspberryPi qOrbiter

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Revision as of 16:56, 28 May 2012 by Coley (Talk | contribs) (Initial notes on virtual pi setup ... more to follow.)

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-The Raspberry Pi is an ARM based computer the size of a credit card. 700Mhz, 256MB RAM, Ethernet, 2xUSB, GPIO

-256MB of RAM is insufficient to build lmce. MakeRelease and MakeRelease_PrepFiles both fail with out of memory errors due to the limited memory available on the RPi. -Cross-compiling will be required. More notes to follow.

Cross Compilation setup

Initially this section will have information specific to getting Qt on Pi going. Its pre-packaged and fairly easy to install.

At the time of writing Qt on Pi tarball is at version 0.2. Get the tarball here http://www.raspberrypi.org/downloads at the bottom of the page. This has a premade SD image plus the toolchain and sysroot install required for cross compilation.

If you are about to install this on your current machine with a working Qt development environment DON'T

You will need to either set up a VM or a chroot environment as the qt5 shipped with this image isn't setup to install alongside an x86 install. They plan on having these play nice in future releases.

Qt5, Toolchain and sysroot install

This is documented on the QtonPi wiki but basically after you have downloaded the qtonpi tarball extract the three files within. Then as root extract [opt-qt5-current.tar.bz2] and [toolchain-and-sysroot-armv5tel.tar.bz2]

$ cd /
$ sudo tar -jxvf /path to extracted image files/opt-qt5-current.tar.bz2
$ sudo tar -jxvf /path to extracted image files/toolchain-and-sysroot-armv5tel.tar.bz2

Qt creator

The tarball comes with a recent version of qtcreator, but since then qt2.5 RC has come out, Should be safe enough to use that instead. Just install that by executing the .bin installer.

Raspberry Pi Setup

As I don't have a rpi yet I used qemu to do some initial testing. My setup was a 12.04 VM. You can either install qemu

sudo apt-get install qemu-system

Or you can build qemu from git. You only need to do this if the qemu on your distro doesn't support the Broadcom SOC (ARM1176 core) on the Pi. In order to boot your image you will need a suitable kernel for your emulator, there is one available here http://dl.dropbox.com/u/45842273/zImage_3.1.9 Boot your virtual Pi

qemu-system-arm -kernel kernel-qemu -cpu arm1176 -m 256 -M versatilepb -no-reboot -serial stdio -append "root=/dev/sda2 rw panic=1" qtonpi-sdcard-0.2.img -redir tcp:5022::22



to the -append param to have the boot console re-directed to the terminal.

the -redir tcp:5022::22 redirects port 22 (ssh) on the virtual Pi to port 5022 on the host enabling you to ssh in.

ssh pi@localhost -p5022