Keyboard interfacing

[gummadi Teja]

 

 

I am doing my project named ATM machine implementation on FPGA. For that I need to interface keyboard ,can anyone tell me how to interface keyboard with nexys4 board.

[jpeyron]

Hi @gummadi Teja,

Here is a Nexys 4 DDR Verilog  keyboard project that should be easy to alter for the Nexys 4. You will need to use nexys 4 ddr's xdc as a reference for the nexys 4's xdc.

thank you,

Jon

[gummadi Teja]

thank you sir, but this code is display for a letters on the seven segment display, but we require display the letters on the monitor by using vga controller. For that we implement some code

if we press one key it displays on monitor after pressing second key the first letter will automatically erase on the monitor it displays only second letter what we are enter on keyboard. How can we solve this problem sir.

we are attaching my code in below, Kindly see our code and verify, please remind us what  mistakes we done.

font_rom.v

font_test_top.v

key.v

letter_key.v

vga.v

[jpeyron]

Hi @gummadi Teja,

I have responded to your other post here.

thank you,

Jon