[U-Boot-Users] problems starting u-boot on AT91RM9200

[U-Boot-Users] problems starting u-boot on AT91RM9200

[David Peters]

I've been trying to get u-boot 1.1.3 to start on an AT91RM9200 system, but I
can't get it to start properly.  Once u-boot is copied to memory and loader
tries to start it, I get garbage on the screen and that is it.  The problem
seems to be in lowlevel_initS.  When it tries to transfer a setup value to a
register, that's when it fails.  I've tried just changing one value and it
still fails.  What am I missing?

I've read the FAQs in the u-boot manual, but I haven't been able to find the
right answer.

Thank you!

 

[U-Boot-Users] problems starting u-boot on AT91RM9200

[Andreas Schweigstill]

Dear David!

David Peters schrieb:
 > I've been trying to get u-boot 1.1.3 to start on an AT91RM9200 
system, but I
 > can't get it to start properly.  Once u-boot is copied to memory and 
loader
 > tries to start it, I get garbage on the screen and that is it.  The 
problem
 > seems to be in lowlevel_initS.  When it tries to transfer a setup 
value to a
 > register, that's when it fails.  I've tried just changing one value 
and it
 > still fails.  What am I missing?

Have you checked that the clock rate and divisor settings are okay? You
should use an oscilloscope or logic analyzer in order to find out if the
"garbage" is related to an uncommon baudrate setting of the serial port.
Do you use 32.768kHz and 18.432MHz oscillators?

With best regards
Andreas Schweigstill


-- 
Dipl.-Phys. Andreas Schweigstill
Schweigstill IT | Embedded Systems
Schauenburgerstra?e 116, D-24118 Kiel, Germany
Phone: (+49) 431 5606-435, Fax: (+49) 431 5606-436
Mobile: (+49) 171 6921973, Web: http://www.schweigstill.de/