[U-Boot-Users] AT91RM9200-EK : using interruptions on applications running under u-boot

[Sebastien JEAN]

Hi leonid,

> What ELDK version you are using? I didn't realize they support ARM, I
>use ELDK for PPC only. I compile code for at91rm9200 using Kegel
>crosstool.


i use ELDK 4.1 arm-linux-x86 under my ubuntu distro.
i did not succeeded installing eldk on my intel macbook pro, so i use
arm-elf-gcc by the way of mac ports.

Do you have some suggestion about my issue ?

Cheers,
Baz.

-----Original Message-----
From: u-boot-users-bounces at lists.sourceforge.net
[mailto:u-boot-users-bounces at lists.sourceforge.net] On Behalf Of
Sebastien JEAN
Sent: Friday, June 29, 2007 5:01 AM
To: u-boot-users at lists.sourceforge.net
Subject: [U-Boot-Users] AT91RM9200-EK : using interruptions on
applications running under u-boot

hi,

i am developping a custom operating system for AT91RM9200-EK board.
I am facing some problems using interrupts.

I cross-compile for ARM using ELDK and it works fine. I have succedeed
in writing and running sample standalone application using DBGU, by
configuring PIO and PDC.

I run my applications under u-boot, consequently i do not make low level
inits any more (my startup.S file just branch at main). My apps are
located at 20000000 (i.e. start of RAM)

I tried to configure interrupt handling mecanism in order to manage DBGU
i/o under interrupt, but i do not succeeded.
I used sample code found in romboot sources, especially asm_ir.S
assembly interrupt handler, and the snippets that configure AIC and
enable IT.

I ve searched for a long time, but i do not what happen.
It seems that my interrupt handler is never called.
May be something is missing in hw inits. Nevertheless I guess that
applications running under u-boot may be able to handle interrupts.

If someone had such trouble or have a working example of code that use
DBGU interrupts on top of u-boot, it would be very helpful for me.

Baz.


-- 
Sebastien JEAN
IUT de Valence