Skip to main content

RTEMS on Raspberry Pi

 Thanks for Michael Engel's help, I reach the point about the first run of example.
The board I used is the module A and USB to TTL Serial Cable(http://www.adafruit.com/products/954)


I also check on http://alanstechnotes.blogspot.de/2013/03/running-your-first-rtems-program-on.html to know how to place the file into SD card.

This is the way I generate the kernel by the example:
arm-rtems4.11-objcopy -Obinary /home/khchen/development/build-rtems-rpi/arm-rtems4.11/c/raspberrypi/testsuites/samples/ticker/ticker.exe kernel.img

However, I find that it is not that trivial to just copy kernel.img into the card!

We first have to format the SD card via the mkcard.txt script before copying the kernel.
(wget http://downloads.angstrom-distribution.org/demo/beaglebone/mkcard.txt)

"use dmesg | tail" to find out the removable disk label, e.g., sdb.
sudo ./mkcard.txt /dev/sdb (run it twice in my case)
First time, it will report this "the device apparently does not exist; did you specify it correctly?"


To build the SD card for Raspberry Pi kernel, the initial partition should be proper.
We can find the information from here : http://elinux.org/RPi_Advanced_Setup
(12.12.2017: the script is somehow not reliable. Please directly use the expert mode to partition the SD card. 7.4Mb for boot. )


We can observe that the connection of usb -> /dev/ttyUSB0 has a different group permission.
Therefore, we have to assign our account into this group, named diologout(20).
http://askubuntu.com/questions/40959/how-do-i-connect-to-tty-com-dev-ttyusb0

After all, we can use screen command to connect into the board with root bash:
sudo bash

screen /dev/ttyUSB0 115200
Also, with HDMI, we can see a colourful figure on the screen.
------------------------------------------------
(I find that I cannot use rsb to build my own toolchain due to the version conflict of python 2.7.10)

About the building of example:
Under the git folder (rtems-git), we do have to ./bootstrap
Then, go to the build folder, e.g.,  /home/khchen/development/build-rtems-rpi/
and run: 
../rtems-git/configure --target=arm-rtems4.11 \
--enable-rtemsbsp=raspberrypi \
--enable-tests=samples \
--enable-networking \
--enable-posix \
--prefix=$HOME/development/rtems/4.11 %I put the bsp file into the folder of toolchain.
and 
make install
We can also try the additional example released by RTEMS, under git folder (rtems-git)
git clone git://git.rtems.org/examples-v2.git examples-v2
cd examples-v2
export RTEMS_MAKEFILE_PATH=~/development/rtems/4.11/arm-rtems4.11/raspberrypi/
make

arm-rtems4.11-objcopy -Obinary $HOME/development/examples-v2/classic_api/triple_period/o-optimize/triple_period.exe kernel.img

Instead of examples-v2, all the others are listed on https://git.rtems.org/
git clone git://git.rtems.org/network-demo network-demo
cd examples-v2
export RTEMS_MAKEFILE_PATH=~/development/rtems/4.11/arm-rtems4.11/raspberrypi/
make
http://superuser.com/questions/674672/sdcard-dev-sdb2-is-apparently-in-use-by-the-system-will-not-make-a-filesystem

Comments

Post a Comment

Popular posts from this blog

RSB+RTEMS 5/6 with QEMU-SMP (ARM realview_pbx_a9_qemu as example)

Since I got a request regarding this blog  written in 2016, summarizing again the complete flow with the latest version of RTEMS could be a good idea. Prepare a suitable workspace according to the adopted operating system on your host ( https://docs.rtems.org/branches/master/user/hosts/index.html ):  sudo apt-get build-dep build-essential gcc-defaults g++ gdb git unzip pax bison flex texinfo unzip python3-dev libpython-dev libncurses5-dev zlib1g-dev Checkout RSB and build: git clone git://git.rtems.org/rtems-source-builder.git rsb change directory to rsb/rtems/ and type ../source-builder/sb-set-builder --prefix=<the path you like to store the built toolchains> <the name of bsp> For example, to use QEMU, I need toolchains for ARM, so: ../source-builder/sb-set-builder --prefix=/home/kh.chen/respository/build/. 6/rtems-arm This will take a while. Please ensure your connection is reliable. Add the built folder into your PATH. For example, you can add one line in ~/.bas...
Post a Comment
Read more

[Gem5] Full system Simulation with Official Kernel

I follow the youtube provided by Gem5 to get the inspiration. (http://gem5.org/Running_gem5#Full_System_.28FS.29_Mode) I download the file here: http://www.gem5.org/dist/current/arm/ with http://www.gem5.org/dist/current/arm/aarch-system-20170616.tar.xz Then Set up M5_PATH as the place I extract the files: "/home/khchen/full_system_images/" If the setting is correct, assigning the disk-image will finish the rest of setting for dtb and kernel specifications. So far I can only use this img (aarch32-ubuntu-natty-headless.img) as my disk-image to run up to the login interface of the ubuntu: build/ARM/gem5.opt configs/example/fs.py --disk-image=/home/khchen/full_system_images/disks/aarch32-ubuntu-natty-headless.img With the other imgs, for example like "aarch64-ubuntu-trusty-headless.img", I think the kernel and the dtb should be given manually, because it will automatically load something with aarch32 prefix which doesn't make sense: info: kernel ...
Post a Comment
Read more

[ubuntu] Removing the instance/package which is not fully installed from apt-get

When I'm installing g77-3.4 for pgplot, I trivially use dkpg to install it. However, g77-3.4-doc is not able to fully installed. And I stuck for this kind of error due to the broken packages (refer to here ): dpkg: error processing realplayer (--configure/--purge/--remove): (Whatever messages) Errors were encountered while processing: g77-3.4-doc cd /var/lib/dpkg/info sudo rm g77-3.4-doc* sudo dpkg --remove --force-remove-reinstreq g77-3.4-doc Hmm, now apt-get works well again. https://www.youtube.com/watch?v=S9HJ-iAzf3k
Post a Comment
Read more