Memory array to pio using DMA (Video)

Yes a DMA can do what you are looking for. But I don't recommend using a PIO to send video offchip.

--- Quote Start ---

You can't predict the rate at which the DMA will write pixels to the PIO.

--- Quote End ---

I am afraid this.

--- Quote Start ---

Instead have the DMA write pixels into a FIFO that has the read port sampled at a fixed rate so that the DAC will see a constant stream of pixels.

--- Quote End ---

i.e. i need in "Avalon-MM Write Slave to Avalon-MM Read Slave" configuration of FIFO?

i.e. SOPC with inegrated VGA- controller can be realized as:

(<sram>-Avalon MM-TS)->

(Avalon MM TM-<bridge to sram>-Avalon MM S )->

(Avalon MM M-<dma controller>-Avalon MM M)->

(Avalon MM S-<fifo>-Avalon MM S )->

(Avalon MM M-<my_master>-Avalon Conduit )

where MY_MASTER has a clock source calculated for video out, and not equal clock for any master (Nios).

I think, I'm right:) Thank you, BadOmen!