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Altera_Forum
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15 years ago

DDR2 SDRAM max buffer lenght

Hi, I'm a beginner with Nios programming and I have following issue. I'm using a DDR2 SDRAM Controller in my SOPC System and I got the description: 333,333MHz, 128MB, 32 bits wide, Descrete Dev...
Altera_Forum's avatar
Altera_Forum
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15 years ago

No one else can know - since it depends on exactly what else you have loaded.

You probably also want to ensure the buffer is cache line aligned.

If you are allocating in in you C something like:

umsigned char dma_buffer[BUFfER_SIZE] __attribute__((aligned(32)));

will ensure the buffer ends don't cross cache line boundaries.