Hi,
I am new at embedded design and I have some problems with u-boots.
I downloaded a patched version of the u-boot 1.1.4 for the board AT91RM9200EK from a FTP Atmel site. To run it I had to make some changes in the configuration file of the u-boot source code at91rm9200ek.h. Basically this changes were about to define the CONFIG_SKIP_LOWLEVEL_INIT, CFG_ENV_IS_IN_FLASH instead of dataflash and other values related to the Flash memory addresses. I only modified this file.
When I crosscompile it with a cross toolchain from codesourcery, everything goes well and once downloaded in the board everything works perfectly. However one thing doesn't work. When I try to download image files using TFTP protocol it doesn't work, it seems like disabled, a lot of unsuccessful tries and bad checksums. The IP addresses of the board and of my PC are corrects and the ethernet cables are plugged. When I remove this u-boot and I download the u-boot image file provided with the Atmel CD and try to use TFTP without changing the IP addresses, everything works fine.
I don't know how to solve this problem. If someone knows, please let me know.
Thanks,
Javier