Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

NiosII DMA Tutorial

Hello, may I know where can I get NiosII DMA Tutorial? Currently, I am doing a project to implement DMA on FPGA board. So I would to refer to some tutorials that can help me. Thanks.
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

How is you pio supposed to receive data? What's the interface to the PIO peripheral?

Usually PIO signal are driven manually in order to emulate the desired interface, so you can't use dma.

If you start a 10bytes-long dma on raw PIO inputs, you will get 10 times the value currently driven onto the PIO inputs, unless this value changes during dma; but in this case you need something to synchronize data to dma, for example an address to access different locations of an external memory or a RD signal to pop data from a fifo.

Regards

Recent Discussions