TMS320F28379D: memcpy from FLASH(FLASHN) to RAMLS1 in standalone mode

Gabor Toth

Hi,

I am trying to use the CLA coprocessor and in standalone mode one has to copy the cla binary from flash to ram. With debug start I don't encounter any problems and the code is copied over. However when I start it in standalone mode and stop after the copy, the target memory range is empty(all zeros) even though the binary is in FLASHN(checked it with disassembly at Cla1ProgLoadStart).

This is the copy code:

memcpy((uint32_t *)&Cla1ProgRunStart, (uint32_t *)&Cla1ProgLoadStart,
(uint32_t)&Cla1ProgLoadSize )

this is the relevant *.cmd code:

Cla1Prog : fill = 0x5555 //fill value for holes
{
.+=0x4; // empty space at head of section
*(Cla1Prog)
}
LOAD = FLASHN,
RUN = RAMLS1,
RUN_START(_Cla1ProgRunStart),
LOAD_START(_Cla1ProgLoadStart),
LOAD_SIZE(_Cla1ProgLoadSize),
PAGE = 0

Regards,

Gabor

over 5 years ago

+1 Ashwini Athalye over 5 years ago

TI__Expert 7715 points

Hi Gabor,

The code looks fine, I did not see any issue with it.

Can you double check that the memcpy is indeed being called in standalone mode? I see that the Cla1Prog in linker command file is expected to have 0x5555 fill, are you seeing any of these non-zero values in LS1 RAM?

Thanks,

Ashwini

0 Gabor Toth over 5 years ago in reply to Ashwini Athalye

Prodigy 10 points

Thank you for the help.

I was affraid, that the memcpy code doesn't run, but I saw no reason why shouldn't it. After some digging I realized, that my debugger resets the CPU when I tried to attach to a running processor, hence was the memory empty at Cla1ProgRunStart.

0 Ashwini Athalye over 5 years ago in reply to Gabor Toth

TI__Expert 7715 points

Glad the issue is resolved.

Thanks,

Ashwini

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TMS320F28379D: memcpy from FLASH(FLASHN) to RAMLS1 in standalone mode