Hi,
I'm trying to cobble together a proto with the AT91SAM9261EK and a WVGA TFT screen using Ulf's 1.2.0-atmel branch. I have gotten the screen to work just fine. The problem is that I need to operate out of SDRAM, and I'm trashing the environment variables somehow. The environment variables are at PHYS_SDRAM + 0x100 and are 0x2000 long so I have tried PHYS_SDRAM + several larger numbers (0x10000, 0x20000, 0x100000) for fb_base but all result in corrupt environment variables when I try to save them. I believe that I am staying out of u-boot's operating RAM (0x23f00000+ correct?), but I could be mistaken.
The symptom is the constantly-recurring bad CRC warning and saveenv appears to have no effect. The settings seem to be working fine when I switch fb_base back to AT91C_IRAM, but obviously the display doesn't function properly. I've looked through for obvious mistakes in writing the logo and text below the logo to the fb but haven't been able to track anything down.
Also, as an aside, I think that the vl_pixclock variable is used incorrectly in the at91sam926X files. It is supposed to be (from the definition) in picoseconds but appears to only work in Hz.
Any help is appreciated.
Thanks, Zac