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@lists.sourceforge.net [mailto:u-boot-users-bounces@lists.sourceforge.net] On Behalf Of Sebastien JEAN Sent: Friday, June 29, 2007 5:01 AM To: u-boot-users@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.