Zybo example with...

[engrpetero]

So I've made a pretty simple IP block in a Zybo design that also contains a Zynq processing system IP.  I'm interested in the button presses and slide switches to serve as inputs to both the PL and PS and to control the LEDS - 2 each - from the PL and PS. 

Struggling to figure out how to get the connections for this.  Can anyone point me to a tutorial (or sample project) for the Zybo that does something similar, please?

(I should have mentioned I'm using Vivado 2019.2 and whatever the current Vitis is).

[Ana-Maria Balas]

Hello @engrpetero,

We currently don't have a tutorial in Vivado 2019.2.

Here is a tutorial for controlling the GPIO from the PL with AXI GPIO IP: https://reference.digilentinc.com/learn/programmable-logic/tutorials/zedboard-getting-started-with-zynq/start

If you want to use the GPIO directly from PS (Zynq)  here is a good tutorial: https://www.youtube.com/watch?v=CHsidFIXUEE

I say this for other users who find this thread and if they have other boards with different Zynq part: We must be careful which is the PIN_OFFSET in our case, depending of the Zynq part and at which pin the EMIO bank start.

In our case, if you look into the TRM for Zynq 7000: https://www.xilinx.com/support/documentation/user_guides/ug585-Zynq-7000-TRM.pdf at page 385, you can see that Bank 0 has 32 bits and bank 1 has 22 bits => 32 + 22= 54 => Bank 2 starts at 54 => PIN_OFFSET= 54

 

You could have both in your design, GPIO from PS by enabling the GPIO through EMIO from Zynq and from PL by adding the AXI GPIO IP to design.

I haven't worked with Vitis yet, but I assume that the instructions are the same. Please tell me where you find discrepancies.