Hello list,
inside the automatic U-Boot patch tracking system a new ticket [DNX#2006040142000017] was created:
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kentropy wrote:
Hello, I'm sorry but I am still facing to problems trying to replace the existing u-boot-0.3.2 with the latest 1.1.3 on a at91rm9200dk board. I built u.boot make at91rm9200dk_config make then I reomved R159 from the board and booted, then I sent loader.bin (found on Atmel website)
then I send the just builded u-boot.bin but at this point the AT91 system freezes showing few random characters on the serial console.
If I use the original u-boot.bin 0.3.2 everything is ok, what am I missing ?
I am starting here, because later in the thread was to much mismatch between the 2 different ways to boot the system:
- Booting u-boot from the parallel flash
The board is delivered with this option. Here it should be possible to simply replace u-boot in the parallel flash. Please check the serial and PLL settings.
- Booting from serial dataflash (romboot, u-boot, kernel, rootfs in
dataflash) Principle shown in: http://www.atmel.com/dyn/resources/prod_documents/doc6067.pdf
Only for this procedure you have to remove R159!
Here *no* program can be executed directly, since the flash is *serial*.
Here we have a multi-stage boot process:
- Internal ROM services are finding ARM vector in dataflash and start
downloading "romboot.bin" from serial dataflash to SRAM 2. romboot starts and sets up processor, RAM+serial 3. romboot loads u-boot from serial dataflash to RAM 4. romboot starts u-boot 5. u-boot loads+starts uImage from serial dataflash to RAM and starts it (bug in common/cmd_bootm.c, patch: http://sourceforge.net/tracker/index.php?func=detail&aid=1072345&gro...) 6. rootfs can be jffs2 in dataflash, newest mtd sources from mtd cvs needed
The romboot delivered by Atmel didn't set up the PLLs correctly, I don't know, if they corrected it on their website. A replacement for romboot.bin compilable with gnuc is here:
http://www.mw-itcon.de/patches/romboot.tgz
Please check always memory addresses, PLL and serial settings in the configs of romboot, u-boot and kernel.
I can definitely confirm, that u-boot-1.1.2 works fine in that case. If needed, I can send you the u-boot config.
Hope, that helps a step further... Peter
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