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Altera_Forum
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16 years ago

How can i know which part of the SDRAM is not used?

Hi,everyone!:p i am using one altera board with a 16mbits SDRAM, I am practicing DMA transfer when this question came to me : there are some part of the memory is used(in fact a lot of it, my p...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

thank you Jack！

sorry for my bad english and bad description。

I have another problem when i am practicing DMA transfer。

I was trying to transfer 20 byte data from my sdram to one uart rs232 port.

my baud rate is 115200, but i can just receive 5 of the 20 data. I don't konw what is the problem. maybe it's because the IRQ problem?

i use quartus 8.1, nios ii IDE 8.1, EP2C20, i enable the stream control

and i have one nios ii/s in my system. the SDRAM's is 16 bits.

THANKS AGAIN FOR YOUR ANSWER!

liuxin

2009,11,7