[ixp1200] Reading data from sdram

[basavaraj_m at dacafe.com]

The SDRAM reads/writes occur at 64 bits so when you read from SDRAM into
SDRAM transfer regs the 64 bit data will be copied into two contiguous
SDRAM transfer registers(32x2) automatically. I hope this answers your
question I had done using Microcode.

>
> Hi,
> I am experimenting with uC_lab1 project from the SDK. When a packet is
> copied
> from the rfifo to the sdram, I want to read that packet data from the
> sdram
> address to sdram read register. Since a single sdram address contains 64
> bit
> data and an sdram read register is 32 bit, how can I read the whole 64 bit
> data
> to sdram registers?
>
> I tried using this intrinsic:
>
> void sdram_read(__declspec(sdram_read_reg) void *data, volatile void
> __declspec
> (sdram) * address, unsigned int count, queue_t queue, sync_t sync);
>
> I can't understand how to declare the "data" parameter as the reference
> says
> it's a structure.
>
> Please help.
>
> Thanks,
> -Shorfuzzaman
>
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