Help calculator project using FPGA Spartan 3A

[73FRI]

Hello Guys...
I want to make Calculator using FPGA Spartan 3A with VHDL code via keyboard.

I have connected PS2 Keyboard with Spartan's LCD.

My Problem is i don't have enough references how to make calculator logic.
any reference and script examples would help me alot...

Thx

 

[Abeer_h]

Refer to this book it contains many design examples Amazon.com: Circuit Design with VHDL (9780262162241): Volnei A. Pedroni: Books

Abeer:twisted:

 

[std_match]

The book by Pedroni is good, but is has one big problem.
It uses the non-standard libraries std_logic_unsigned and std_logic_arith.
It is very confusing for a beginner to see simple things like incrementing a counter done in different ways in different books/sources.

Go for the standard library numeric_std !
I recommend this book by Peter Ashenden:
Amazon.com: The Designer's Guide to VHDL, Volume 3, Third Edition (Systems on Silicon) (9780120887859): Peter J. Ashenden: Books

Ashenden's book is maybe not the best for hands-on experimenting, but it is much better as a reference than the Pedroni book.

For hands-on experience, go to a website like www.fpga4fun.com or similar.

 

[Abeer_h]

I started learning vhdl last month by myself.. I used pedroni's book. He did well in providing many examples but not that well in explanation. Yesterday I started Dougles Smith book "A practical Guid for designing, Synthesizing and simulation ASIC and FPGA's using vhdl and verilog" I heard positive feedback about it although it is an old book (1996).

Abeer :twisted:

 

[73FRI]

would u like to give me some simple examples about my project

btw i use Xilinx ISE Design Suite 12.4

sorry for this noob question

 

[Abeer_h]

Do you know how to write VHDL codes?

 

[73FRI]

yes I do... I have connected connected PS2 Keyboard with LCD on xilink spartan 3a for my first project.

Now, I want to make a simple calculator using numpad on PS2 keyboard with LCD on xilink, but i don't know the mathematic logic for plus, minus, sub, div.