uClinux on STM32

[awesten]

Posted on November 17, 2009 at 18:36

uClinux on STM32

#stm32-uclinux-bootloader

[ekawahyu]

Posted on May 17, 2011 at 12:16

Hi STOne-32,

Where can I get the source code of kernel_boot_loader.c from ST website?

Thanks

[ekawahyu2]

Posted on December 20, 2011 at 05:56

Still the same questions from last year, where is the source code of the bootloader? Shouldn't it be provided along with the spirit of the open source software? Thanks.

[trauervoll]

Posted on December 29, 2011 at 19:18

Hello,

I'am looking for the package

STM3210E-EVAL uClinux software kit

which contain the files bellow as described in application notes

CD00242717.pdf

:

- uClinux_on_stm32.patch.gz: the uClinux patch, using which the ARM Cortex-M3 CPU

and STM3210E-EVAL board are supported.

- AN3012.pdf: the purpose of this guide is to show all the steps necessary to

successfully configure, build and run uClinux on the board. It also presents the

procedure to add new hardware driver and applications to the kernel.

 

- Tiny_kernel_boot_loader.hex / kernel_boot_loader.hex: these are the boot loaders

required to boot up the board and load uClinux (kernel loader / firmware updater).

- uClinux_on_stm32-jffs.dfu / uClinux_on_stm32-MCU_Flash.dfu: these are the binary

image files that can immediately be downloaded to the board to get uClinux running.

can you say where i can found thus package please?

Thanks!

[Tesla DeLorean]

Posted on December 29, 2011 at 22:18

Have you tried your local ST FAE, representative, or sales office?

[trauervoll]

Posted on December 30, 2011 at 10:58

yeap! but i didn't have a reply yet...

thanx!

[IHS1]

Posted on January 12, 2012 at 09:54

I found

this implementation

on the web

for

STM3220g

uClinux

-eval.

It looks interesting

.

STM32F2

Linux

Evaluation

Kit (

emcraft)

Evaluation

Kit

includes

the Following

components:

    

1

Emcraft

Systems'

STM

-MEM

Providing

plug-in

board

PSRAM

and

8MB

NOR

32MB

Flash;

    

Linux

Board Support

Package (

BSP)

for the

STmicroelectronics

STM3220G

-EVAL

board.

Best regards.

[vlad239955]

Posted on January 14, 2012 at 20:38

Indeed, Emcraft Systems provides Linux (uClinux)

port for STM32F2 using the STM3220G-EVAL board +

Emcraft's STM-MEM add-on as a hardware reference

platform

http://www.emcraft.com/index.php/products/89

.

The STM-MEM add-on board provides 32MB of PSRAM and

8MB of NOR Flash. Linux (uClinux included) requires

external RAM to run - the integrated SRAM of

STM32F2 is not nearly large enough even for

an ultra-tiny Linux configuration; you need at least

4MB of external RAM for practical configurations.

In respect to specific devices to use for

external RAM in a practical STM32F2 design

targetting Linux, STM32F2 supports only SRAM

devices as far as external RAM is concerned.

You would be able to get a 16MB 70ns PSRAM (with

a Page Mode for 20ns sequential accesses)

for $6-7. That device draws power at just uA

levels at static times making it possible to

use Linux with power-sensitive applications. 

Of course, you also need something to load

a bootable Linux image from, but this can be about

anything - network, SDcard, SPI EEPROM, NOR Flash,

etc; even embedded Flash, in case you boot from

a compressed kernel and mount a root filesystem

on NOR Flash, SDcard, NFS, etc.

[vlad239955]

Posted on April 19, 2012 at 08:21

Emcraft Systems has open sourced its ports of U-Boot and uClinux for Cortex-M3 and Cortex-M4 at github:

https://github.com/EmcraftSystems

For more information about supported reference platforms, refer to Emcraft's web site:

http://www.emcraft.com

[vickey]

Posted on June 12, 2012 at 12:19

We are designing a board based on STM32f103 with 1MB of internal flash. We want to run uCLinux on it.

On the stm3210e eval board, you have used a huge NAND FLASH, then 16 MB of nor flash, and 16 MB of serial flash. I want to know whether all these are necessary to run uClinux.

Frankly, I just wanted to confirm what is the minimum memory requirement( flash as well as RAM) for the running some basic application on uclinux using a stm32f1xx ucontroller.

Hi Tarm,

Quote:

I realize this is just a preview release, but I am very curious about it. I loaded it up and looked around. It still looks pretty basic with just a kernel and bare-bones busybox. Getting the image that small is very impressive! I assume you are basing your changes on Catalin Marinas's CM3 linux tree? How much additional modifications did you have to do to get it to boot? You seem to have drivers for GPIO, LCD, and USART. What additional peripherals do you intend to make drivers for?

Thanks for the comments :) , Yes we started from Catalin Marinas's CM3 linux tree for the Cortex-M3 support and we have fixed some minors issues inside the Core then we build our own blocks and drivers especially for the UART and Clocks to enabled the boot. We are not planning to add more drivers from the time being however we will post the full source codes to give them to the Open community as starting point with STM32 to be enriched and developed by Linux /uclinux funs...

Quote:

One request though. Please push your linux modifications upstream as soon as you can. It is frustrating to have embedded platforms that are not upstream and only older kernels available from the manufacturer (or even more difficult, third party ''partners'') and they get old and stale very fast. If you can get the changes upstream, you will be doing your customers and yourself a big favor (from a maintenance perspective).

Thanks for the push, Yes it is planned once we get a proper and stable version to be uploaded to the www.uclinux.org

Our current build is based on the Original ''uClinux project page''

http://www.uclinux.org/pub/uClinux/dist/uClinux-dist-20080808.tar.bz2

which is the latest stable version of uClinux which implements the Linux kernel 2.6.26-uc0.

You also need the uClinux distribution update patch file:

http://www.uclinux.org/pub/uClinux/dist/patches/uClinux-dist-20080808-20090112.patch.gz

Cheers,

STOne-32.

[Tesla DeLorean]

Posted on June 12, 2012 at 16:23

Sounds like you need to become more familiar with the software you have chosen first as part of the due diligence process. You should perhaps see if Emcraft provides consulting services, or can point to some providers, as there isn't much traffic related to ucLinux on this forum.

Suggest you review the Emcraft FAQ, which specifically covers FLASH/RAM requirements.

http://www.emcraft.com/index.php/technology/99

You can no doubt augment that knowledge by trying some builds including the tools/application mix(es) you expect to need, or want to support.