After obtaining an HDMI video out from the EBAZ4205 board and being able to use it from Linux by /dev/fb0, now I need to interact with Linux and the C / Python app (showing the spectrum, tuning and so on) with standard input devices keyboard and mouse.

For this need, I examined two options:

• USB
• PS/2

USB

Unfortunately EBAZ4205 has no USB interface, but I found the way to implement it using a cheap external module USB3300

I'm now looking forward to arriving it from China.

PS/2

• It's a bit obsolete but it is very promising because it doesn't need any hardware addition.
• I found an AXI PS2 IP controller from DIGILENT: AXI PS/2 1.0 IP Core User Guide from DIGILENT,. I tried to use it but I didn't succeed! 
• So I decided to use some VHDL code I found here PS/2 Mouse Interface (VHDL). Unfortunately this VHDL code manage the two buttons PS/2 mouse only and not the middle button and the wheel (so called IntelliMouse), so I had to integrate the VHDL code. 
• Then I also found a linux device driver  xilinx_ps2.c with a similar memory mapped interface that I hope to be able to adapt.

You can follow the full Hackaday project EBAZ4205 PS/2 Mouse