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Altera_Forum's avatar
Altera_Forum
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15 years ago

Can DMA perform this application?

Hi, My application requires the following functionality with which I can get huge speedup. I want to read the data from sdram 4 bytes at a time, perform some computations and write back to sdra...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Here is the 'go' bit behavior amongst the various DMAs:

DMA --> Writing '0' to the go bit will not stop the DMA

SGDMA --> Writing to the stop bit in the control/status registers will stop the SGDMA on a descriptor basis (I think.... it's been a while since I've used it)

Modular SGDMA --> Writing the to stop bit will allow the bus transfer to complete and then it will stop. Dito if you reset it.