Debug QNX Neutrino Sirf atlas ARM926EJ-S Core no IPL code Code at Base adress in j-link

Frans · Mar 25th 2015, 11:53am

hello,

i Debug a QNX RTOS Neutrino Sirf atlas ARM926EJ-S Core in segger j-link.

if i want to see my IPL code with mem command there is just FFFFFF at the Base adress where my IPL code is stored.

my target Boots fine and the IPL is stored in Flash.my (target HW is also OK) other board same problem)

when i use the mem command for example my IFS code i see the correct Data at that Base adress.

also when i use the savebin command start at the Base adress of my Flash memory i cant read 64 MB of data i get core errors.

so is there something i can test or try? i hope to get some tips i am a newbie with ARM cores.

SEGGER - Erik · Mar 27th 2015, 2:08pm

Hi,

also when i use the savebin command start at the Base adress of my Flash memory i cant read 64 MB of data i get core errors.

The ARM926EJ-S CPU core does not come with internal flash, so I assume you have connected some kind of external flash (parallel NOR / NAND, etc...) to the CPU correct? Can you please describe your setup in more detail (e.g. what kind of external flash is connected to the CPU)? What are you trying to do and what does not work? Do you have the data sheet of the used device, which you can share with us?

SEGGER - Alex · Apr 2nd 2015, 8:02pm

Hi,

if i want to see my IPL code with mem command there is just FFFFFF at the Base adress where my IPL code is stored.
my target Boots fine and the IPL is stored in Flash.my (target HW is also OK) other board same problem)

Sounds a bit like as the MMU is reconfigured by the application running on the target, so that the Flash is no longer visible at its original address...

- Alex

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