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There is a nice project:
http://zynqgeek.blogspot.com/2012/09/creating-custom-peripheral.html

But how can I use this port (register) assigned to external pins? For example, write to the LEDs and read the switches.

And how can I write my independent HDL code, for example, just reflect on LED0 (LD0) the state of the switch0 (SW0).

I'm used to FPGAs and the ISE environment, but I'm having some trouble trying to do these simple tasks with the Zynq.

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    Ufa! It worked!
    I used the import back method.
    To save someone else time, these are some, maybe not so obvious, hicups I had:
    a) When you are importing the peripheral, at some point it asks you to set the AXI4_lite parameter, deselect IO_space, select memory_space and set C_baseaddr and C_highaddr.
    b) At the XPS Ports tab, when you make your ports external, rename them to match the UCF file (the names you want for your pins).
    c) When I tried to Run Synthesis, there where an error about the wrapper file, it had not the ports declared. This file is created when you "Create Top HDL" in the PlanAhead. In my case, I had done it before changing my peripheral.
    I don't know yet how to regenerate this file, and as I accidentally deleted it and didn't know what to do, I started a new project, generated the right bitstream before "Create Top HDL", and then it worked.

    Thanks for the help.

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  • 0

    Ufa! It worked!
    I used the import back method.
    To save someone else time, these are some, maybe not so obvious, hicups I had:
    a) When you are importing the peripheral, at some point it asks you to set the AXI4_lite parameter, deselect IO_space, select memory_space and set C_baseaddr and C_highaddr.
    b) At the XPS Ports tab, when you make your ports external, rename them to match the UCF file (the names you want for your pins).
    c) When I tried to Run Synthesis, there where an error about the wrapper file, it had not the ports declared. This file is created when you "Create Top HDL" in the PlanAhead. In my case, I had done it before changing my peripheral.
    I don't know yet how to regenerate this file, and as I accidentally deleted it and didn't know what to do, I started a new project, generated the right bitstream before "Create Top HDL", and then it worked.

    Thanks for the help.

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