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Altera_Forum's avatar
Altera_Forum
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13 years ago

PIO higher than 32 bits

Hi, I'm trying to interface a NIOS2 with a self-designed VHDL module, a simple one. Until now I was using a 32 bit PIO for transferring data from the VHDL to the NIOS2, but I would like to inc...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

You are right, the PIOs are limited to 32 bits. I'm not sure I understand how using 2 PIOs will increase significantly the time. You will just perform two 32-bit operations instead of one.

If you have a high thoughput you could consider using a DMA. The SGDMA or the modular SGDMA available on this forum can accept data from an Avalon Stream interface which is really easy to implement. AFAIK those DMAs can process 64-bit words.