I have build it using this git-hub repo https://github.com/jameswalmsley/RaspberryPi-FreeRTOS
Then pasted the kernel.img generated by building the freeRTOSto the sd card which earlier contained raspbian, replacing its existing kernel.img file.
But this doesn't seem to work. I connected my raspberry pi to a monitor and it displays a colored screen.
Is there any fix for this?? Please help
Copying and pasting a .img file will not boot the OS.
You will first need to create an MBR (master boot record) on your SD card using a tool like RUFUS https://rufus.akeo.ie/
Then, you will need to use the win32 disk imager tool to write the file to your SD card. https://sourceforge.net/projects/win32diskimager/files/latest/download
Then you can boot the SD card.
DISCLAIMER::
Whilst I have done my best to ensure that the links provided are for the programs I have described, please understand that I am not responsible for the content hosted on these sites. By extension, I am not liable to any damage caused by the sites or programs themselves.
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I got my hands on an already deployed yocto system (yocto 2.6.2 - thud) on a board with a NXP i.MX 6UL Cortex-A7. My only possible access at the moment is via wifi. I have access as root via wifi with ssh. The board is embedded into a case which I can't open. So no physical access to that board - just wifi.
My further intention is to setup/deploy/flash my own OS (yocto/debian/etc.) onto this board, but I have no proper knowledge to do so...
Is it even possible to flash a new image only with wifi access?
Which step is the next one I should consider?
Are there any documentations to start with?
Thanks
From your comments, I mention that you have the Variscite DART-6UL module. The producer of your module provides a wiki with lots of information and tutorials on how to start work with. Variscite DART-6UL Wiki
How to build your yocto system
Ready solution for update - SWUpdate Guide
Using SWUpdate is the easiest way to achieve updates for your module.
Custom solution:
Another way is to develop your own mechanism. In this case, you can do developed all processes and make them fully automatic, but it is complicated and required knowledge and experience.
For development boot from the server
For the development time, it can be useful to use booting from TFTP/NFS server. More information here
Other help sources:
Yocto Project - System Update
SWUpdate: software update for
embedded system
Updating Embedded Linux Devices: SWUpdate
I am new to embedded world and trying to understand the difference between a BSP (Board Support Package) and U-Boot utility. My understanding is that both of them reside on ROM area of the target board. When the board's power is turned ON then first the processor control goes to U-Boot that initializes the board peripherals as well provide boot parameters for the OS to boot-up.
When the OS is launched it needs the BSP to communicate to the board's peripherals.
Is this correct understanding or am I missing something here?
Das U-Boot is a bootloader. It is a piece of software which runs when you turn on the processor. It's job is to load the main software and get it ready to start.
A board support package is all the software that you need to run software on one particular board which is different from what you would need to run on a different board.
A BSP might include a boot loader and that boot loader might be u-boot. If the processor on the board does not need a bootloader or it is pre-programmed in ROM then the BSP might not include a boot loader.
The BSP will also include various other things such as header files or a device tree to tell you which peripherals are connected to which ports and pins, and maybe drivers for those peripherals.
I see GNU EFI is a tool chain to compile applications, but it doesn't seem to come with many libraries.
Tianocore EDK2 comes with a lot of code, with modules and drivers that I'm still figuring out. By default, it builds a full firmware image that I use as a BIOS.
What I need to do is, develop a network-capable application that will query a server for boot instructions, and then prepare the next steps. The idea is to control the boot process from the management server, so the client should be able to follow the instructions to boot from TFTP, or from local storage, or update local storage etc.
You have two main options for writing UEFI network applications.
Managed Network Protocol has the firmware trying to autoconfigure your network and download files as appropriate via TFTP/PXE or HTTPS.
Simple Network Protocol gives you raw access to a packet interface if you want to handle things yourself.
I'm developing a hobby thing for Raspberry Pi. It gets data from a racing game (Project CARS 2) on consoles, and stores the players laptimes in a db. They can be viewed a in a browser (php). The project consists mainly of a .NET exe, some php files, and a MariaDB. Currently I'm distributing it as an image file, that the user can download and write to a micro sdhc card.
Question: Is there a way to run a script that checks github if certain files have been updated? And if so, download them and overwrite the old files?
Github here: https://github.com/Maskmagog/projectcalc
The php files should be in /var/www/html/ on the Pi. The other directories are in /home/pi/.
I don't want to release a new image file for updates, as that would wipe users local databases. Thankful for any pointers in the right direction. I'm new to programming, and Github in particular. Thanks.
EDIT: Raspberry Pi runs standard Raspbian Stretch.
EDIT 2: Looks like maybe a 'git pull' can do this? It is not installed by 'git clone', would a 'git pull' still work? Sorry this is very new to me, I'm trying to learn about git commands.
I'm currently evaluating Vagrant, and so far I really like what I've seen. As per default Vagrant uses Virtual Box as VM, but can also use other local or remote targets, as long as there's a provider for it, e.g. VMware or Amazon.
Now I'd like to use Vagrant to deploy a VM to a Raspberry Pi. Is this possible?
I know that in the end this means I need to run some kind of virtualization on the Pi (and it's a definitely reasonable question whether that's a good idea at all, but I'm curious).
Is this possible? If so, how?
Please note that I first asked this on ServerFault, but the question does not fit there, as they don't see RasPis as "real" servers … hence I am re-asking the question here.
One possible route would be to use Vagrant to manage the state of the image locally, and then use qemu-img to convert the vmdk to an img file and flash that to the SD card.