ConnectCore 9M 2443 U-Boot

Embedded Devices Linux
1

Hi All,

I’m new to ARM9 core. Does anyone know how to re-build U-Boot and put it back to this development board ? I would like to add some GPIO control on it.

Thanks in advance.

Best Regards,
Kevin

2

Which ESP are you using?

3

Hi Bob,

I’m using Digi ESP Version 2.0
Build id: 20090423-RevA DEL-5.0 for Digi Embedded Linux 5.0

Kevin

4

Go to Digi ESP -> New Project -> Uboot Project.
There you can modify the code.

5

Hi Bob,

Thanks. How can I test this new U-Boot code? As simple as “Hello World” demo or perform the U-Boot recover process ?

Kevin

6

Change the code as needed then build & install the project…
final image will be in tftp folder … then using update command you can update the uboot partition on flash from the image in tftp folder on PC.

7

Hi Bob,

Thanks. I tested the U-Boot code by “update flash” on the mtd0 partition directly.

May I know the program flow during power-up sequence ? The ARM9 should execute Start.S Assembly code first, then what will be the next ?

Best Regards,
Kevin

8

Hi Kevin ,

I am senidng the link , from here you can find the
program flow sequence during power-up the module.

http://msdn.microsoft.com/en-us/library/Aa446905\

Regards,
cpigilam