Reply by ted_buswell ●August 12, 20042004-08-12
--- In , "nadhje" <nadhje@y...> wrote:
> The only doubt i have now is how to say to the HPI address register
> whether the data i'm going to write goes to the PROGRAM pages or the
> DATA pages.

The HPI presents a flat address space - just ignore program vs. data.
You should find that they don't overlap. If they do overlap,
you've got other problems :)

Reply by Les Newell ●August 11, 20042004-08-11
Hi David,
My experience is with the 5402 but I would have thought they are pretty
similar.

There is an output that has to be connected to an input to boot in HPI
mode. I can't remember the exact pins, the data is at work and I am at home.

Reset the dsp
Release reset on the dsp.
With the two pins connected the DSP now runs a bootloder from it's
internal ROM.

Write to memory - OVLY is 1 at this time so program memory = data memory.

Write the program start address to the boot vector. Th DSP should now boot.

HTH,
Les

nadhje wrote:
> Hello everyone.
>
> I've decided to build my own HPI bootloader for the C5410 and i found
> some problems concerning the addressing.
>
> In order to boot the code I have to write the program in the DSP
> memory during the reset. I used the DSK coff extractor of the DSK5402
> to format the .out file.
>
> So, i've read the TI docs and i've writen a program analog to the hpi-
> boot of the C5402 DPSK.
>
> That is:
>
> RESET THE DSP
> WRITE PROGRAM MEMORY
> WRITE DATA MEMORY
> STOP RESET
>
> The only doubt i have now is how to say to the HPI address register
> whether the data i'm going to write goes to the PROGRAM pages or the
> DATA pages.
>
> I know that you have to write the address into the HPIA but my
> question is: Which address?
>
> Does anybody know how to translate a data/program address into a HPI
> address?
>
> David.
>




Reply by nadhje ●August 11, 20042004-08-11
Hello everyone.

I've decided to build my own HPI bootloader for the C5410 and i found
some problems concerning the addressing.

In order to boot the code I have to write the program in the DSP
memory during the reset. I used the DSK coff extractor of the DSK5402
to format the .out file.

So, i've read the TI docs and i've writen a program analog to the hpi-
boot of the C5402 DPSK.

That is:

RESET THE DSP
WRITE PROGRAM MEMORY
WRITE DATA MEMORY
STOP RESET

The only doubt i have now is how to say to the HPI address register
whether the data i'm going to write goes to the PROGRAM pages or the
DATA pages.

I know that you have to write the address into the HPIA but my
question is: Which address?

Does anybody know how to translate a data/program address into a HPI
address?

David.