FPGA Central

Hi,

I am using a small boot loader to copy an application to SDRAM and it'
vectors to address 0x00. While using the Spartan 3an starter kit, I woul
create a pointer to address 0x00 and write directly into that address. I.E


unsigned char *pointer = 0x00;

On May 28, 1:51*am, "hvo" <hai...@synrad.com> wrote:
> Hi,
>
> I am using a small boot loader to copy an application to SDRAM and it's
> vectors to address 0x00. *While using the Spartan 3an starter kit, I would
> create a pointer to address 0x00 and write directly into that address. I.E.
>
> unsigned char *pointer = 0x00;

To avoid warnings, you may want to write something like:

unsigned char *pointer = (unsigned char *)0x00;

Otherwise I don't see why this shouldn't work. I presume
you're using a MicroBlaze?

Regards,
Gabor

>On May 28, 1:51=A0am, "hvo" <hai...@synrad.com> wrote:
>> Hi,
>>
>> I am using a small boot loader to copy an application to SDRAM an
it's
>> vectors to address 0x00. =A0While using the Spartan 3an starter kit,
wo=
>uld
>> create a pointer to address 0x00 and write directly into that address
I.=
>E.
>>
>> unsigned char *pointer =3D 0x00;
>
>To avoid warnings, you may want to write something like:
>
>unsigned char *pointer =3D (unsigned char *)0x00;
>
>Otherwise I don't see why this shouldn't work. I presume
>you're using a MicroBlaze?
>
>Regards,
>Gabor
>

Hi Gabor,

Yes I am using MicroBlaze. The puzzling thing is that it worked with th
starter kit and not the custom board. I am only writing to Block RAM. M
code does run the bootload sequence, but I cant write into address 0x00, o
any vector addresses. Are there some kind of write protect for th
BlockRAM that I am not aware of?

Thanks for your reply, Regards
hvo