How to connect the 2 leds in the same axi gpio interface

Question

MiniZed board has two pl leds (green and blue). In the IP integrator block diagram (vivado 2017.1) I can create an axi gpio interface and automatically connect one of the the two leds. Given that GPIO interface supports up to 32 bits it seems too much to use a second channel or a second axi gpio interface for connecting the second led. I can customise the axi gpio channel to support 2 bits but then how to connect the automatically inferred gpio_rtl signal to the leds? Graphically it doesn't seem possible. I suspect I have to use a custom constraint file but I am clueless about where leds map to the fpga

jafoste4 · Accepted Answer

Hello InnoDim,

We have an example design on our reference design page that accesses the two PL leds using a single axi gpio and then routes it through the PL using constratins. My suggestion for you would be to use this is an example as you create your project.

Please refer to the refernece design "Prebuilt Platforms Using Hardware Definition Files(HDFs)" It goes through the process of using automated build scripts to build the project, after you build it you will be able to open it an explore it, leverage it in your design.

http://minized.org/support/design/18891/146

--Josh