CCS/OMAP-L138: Pls help:The host download code to omapl138' arm core by HPI bootloader,But the HPI interface does not work after ARM core restart.

Hi,

Which Processor SDK RTOS version are you using?
Or is this a bare metal (no OS) code?

Best Regards,
Yordan

Dear yordan,

This is a bare metal (no OS) code?

Thanks.

Hi Yordan,

When HOST download ARM image to L138 through L138 boot mode,it is successful, customer observed HPIAR register incremented by 4 bytes(1words) through HOST side read. After boot process finish, the image works well in L138 ARM core(LED blink program), but HOST can not access L138 memory now, after read HPIAR register, customer found HPIAR incremented by 1 bytes now, as memory access through HPI needs 4bytes alignment, so 1 offset memory acess can not be successful. From hardware, p.o.v, HOST-OMPL138 address pins are not changed during boot stage and after boot-stage.

Question: What is the possible reason to make HPIAR address increment by 1 after boot stage? Normally it should be 4.

Thanks a lot!
-Thomas

Hi,

I've notified the SW team. They will post their feedback directly here.

Best Regards,
Yordan

Hi Expert,


As you can see above picutre, in the boot stage, HPIAR increments by 4 bytes, 0x80000000, 0x80000004, 0x80000008... but after boot stage, HPIAR increments by 4 bytes, 0x8001ff00, 0x8001ff01.... Data from L138 are 0,. We have already checked the HPI related regsiter, but no error finding, Do you have any suggestion on this issue?


Thanks


Thomas