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Assigning Pins to a Custom Peripheral

chipslinger

I'm trying to bring out pins from a custom peripheral, but they're not showing up in the pinout report.

What I did was take the generated register set, add in new i/o signals, new logic, and new components that are in separate files. So, what was once a register set, is now a series of peripherals, like SPI controllers, i/o ports, timers, etc...

I can write/read the registers from a simple diagnostic program, so my hardware seems to actually exist.

When I first created the register set, the only connections were to the AXI bus. There are now about 40 lines that I need to assign to pins.

I've added the file names to the .PRJ and .PAO files. I've figured out that I need to (eventually) add the pin names to the data<project>.ucf file, but right now the pin names don't show up in the pin report, so I get an error if I add them into the ucf file.

How do I make the pins (which are now at the top level of the register set) show up as pins on the device?

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    Yes, I've gone through that document a few times looking for clues. I just re-read the sections you've suggested.

    Sorry for perhaps not describing my process using the same terminology.

    I'm pretty sure that I am doing what you suggest by adding the constraints to the MPD file, and by mapping the PL to physical pins by selecting them as "MAKE EXTERNAL" within XPS.

    To recap using the terminology you're using....

    If I don't add the signals in the MPD file, they don't show up in PL to physical assignment page. However, after adding the pin to the MPD file and rescanning the user directory, the pin shows up in the PL to physical assignment page. I then select the pins as "MAKE EXTERNAL," clean the project files and recompie. The pins do not show up inside the pinout file. Indeed, if I try to add the pin names to the UCF file, the compiler gives me an error because it does not find the signal names.


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    Yes, I've gone through that document a few times looking for clues. I just re-read the sections you've suggested.

    Sorry for perhaps not describing my process using the same terminology.

    I'm pretty sure that I am doing what you suggest by adding the constraints to the MPD file, and by mapping the PL to physical pins by selecting them as "MAKE EXTERNAL" within XPS.

    To recap using the terminology you're using....

    If I don't add the signals in the MPD file, they don't show up in PL to physical assignment page. However, after adding the pin to the MPD file and rescanning the user directory, the pin shows up in the PL to physical assignment page. I then select the pins as "MAKE EXTERNAL," clean the project files and recompie. The pins do not show up inside the pinout file. Indeed, if I try to add the pin names to the UCF file, the compiler gives me an error because it does not find the signal names.


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