connecting ArtyA7 rgb_led in Vivado IP integrator

[matic]

In all example project I could found, rgb_led is driven from a GPIO block. That works well but I need to drive it from a row of XOR gates and so far I could not convince Vivado to connect the output of the XOR to rgb_led. If you look at the attached picture, the goal is to connect "Res" or "BUFG_O" to rgb_led (which seems to have a 12 bit input since the GPIO which was driving it in the sample project is 12 bit wide).

Does anyone know how to do ?

 

[JColvin]

Hi @matic,

The board interface for the rgb_led (I presume you got it from the board file for the Arty A7, though I don't see the board tab in your screenshot) is defined in the board files as a GPIO slave interface. This makes it so that the only thing that can connect to it as is, is a GPIO master interface.

If you wanted to connect to the RGB LEDs to a different buffer or logic, you would need to (re)define the pins in a .xdc and set them up as an external port.

Let me know if you have any questions.

Thanks,
JColvin