edk peripheral communication

I was wondering if anyone can tell me if using edk, is it possible to create 2 separate peripherals with external ports that can communicate with each other?

What i'm trying to design is a peripheral which acts as a pipeline stage which has some memory that is written via a microblaze. This memory is then used to store coefficients to be used during normal pipeline operation.

Multiple pipeline stages should then be added and connected to each other using external ports (via the .mhs file ) and run independently of the microblaze.

I have constructed these blocks and the memory portion is working however i cannot get the 2 peripherals to communicate with each other is there anything i'm overlooking?

Has anyone done anything similar to this?

Shane

If you want your peripherals to communicate you will need to connect them together. In order to do this they must have some ports. The specification of those ports is up to you but they must appear in the VHDL/Verilog code (obviously) and also in the MPD file for your peripheral. The ports will then appear in XPS, in the "Ports" display mode. You can make the ports external (as you would usually do) but you can also connect ports internally simply by connecting them to the same net, just assign unique net names and you're set. If your port uses a standard xilinx bus spec (like MCH/XCL initiator and target) it will appear in the main window (provided the MPD file is correct) and you can connect it by clicking on the little wires and triangles XPS displays, just like you would connect a peripheral to the bus.

For instance I created a peripheral that must access data from RAM at high throughput. I gave it a MCH initiator interface and connected this to the mch_sdram controller using the GUI. I had to hack the files a bit to get the correct syntax but it's easy. You have already done this if one of your peripherals has an interrupt that you connected to opb_intc, it's the same.

The interface sucks, though, you might want to edit the MHS file directly and do some happy copypasting.