OpenOCD and AT91EB55

Development Boards MicroMod
1

Hi,

I’m trying to use OpenOCD with the AT91EB55 from Atmel, witch is build around the AT91M55800A microcontroller. This board includes 2MB of flash.

I was writing a config file for this, since I dind’t find any, but I don’t’ know how to configure the flash (flash bank <chip_width> <bus_width> [driver_options …]), namely the and parameters.

Can anyone give me a hint?

Thanks,

Luís M. Costa

2

Hello Luis,

the AT91EB55 uses an AT49BV162A flash from Atmel. This flash uses the AMD/Spansion/Atmel/… command set (0x2), which isn’t supported by the OpenOCD at this time.

There are a few patches that add support for this type of flash, but none was ready for inclusion, and as I don’t have access to a board with such a flash myself I can’t work on this either.

If it was supported, the correct flash configuration would be:

flash bank cfi 0x200000 2 2 0

This would configure a CFI compatible flash of 2MB size with a single 16-bit chip on a 16-bit bus.

Regards,

Dominic

3

Thanks for the response Dominic!

Dominic:
There are a few patches that add support for this type of flash, but none was ready for inclusion, and as I don’t have access to a board with such a flash myself I can’t work on this either.

Do you have any idea where could I find such a patch?

Best regards,

Luís M. Costa

4

This patch is against an older version of the OpenOCD. Basically you have to reimplement all the intel_xxx functions, and add calls to your new versions in the switch statements.

https://developer.berlios.de/patch/inde … up_id=4148

Regards,

Dominic

5

Thanks, once again!

Dominic:
https://developer.berlios.de/patch/inde … up_id=4148

Just a quick note to say that the link only works if it is used plain HTTP, rather than HTTPS.

I’ll see what I can do, and if I succeed I’ll be glad to share my results with everyone. But I’ll start by debugging programs in RAM, using Olimex ARM-USB-OCD.