There is only a demo which transmit data from fpga's off-chip RAM to
atom in the video example you provided .So can you give a linux demo
about how to transmit data from atom to fpga's off-chip RAM by DMA?
Please read the video driver zlge6x5c-video.c.
I already read it ,but the video driver only transmit data from fpga's off-chip RAM to atom by DMA. I want to konw how to transmit data from atom to fpga's off-chip RAM by DMA.
You can read the file "atse.c", may help you.
This file is a part of the FPGA ethernet driver.
In this driver CPU and FPA tranmit data via SG-DMA between FPGA's off-chip RAM and CPU.
the part of
/*******************************************************************************
* SGDMA Control Stuff
*
*******************************************************************************/
may can help you.