where in the memory of PS block of Zynq the captured image data is stored of Zynq Processor ? So that I can take it to PL block using AXI interface

Question

I have a GigE camera. I am using Zynq board. Now using linux programming I program the PS part of Zynq processor and capture the video and Now I have imagebuffer variable which has the captured Image data. I want to take the data from PS to PL part using the AXI interface I am probably going to use the AXI_VDMA interconnect, the problem is where in the memory the Imagebuffer is stored so that I can bring it to the PL part in Zynq.

Here is the image of Zynq processor. enter image description here

The answer depends to some extent on how your application is structured. Is there a user-space application memory mapping the video frame buffer? — Jamey Hicks, May 23 '14 at 13:57

score 1 · Answer 1 · answered May 23 '14 at 14:10

In general, the CPU accesses the video image buffer using either a kernel or user space virtual address. The progammable logic uses physical addresses, so you will need to translate the virtual address to a physical address and configure AXI_VDMA to use that.

In there Linux kernel there is a device driver for xilinx_axi_vdma which uses dma-mapping to solve the virtual/physical mapping problem.

See XAPP792: and its corresponding reference design for more details on how to use this.

where in the memory of PS block of Zynq the captured image data is stored of Zynq Processor ? So that I can take it to PL block using AXI interface

1 Answers1