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Altera_Forum
Honored Contributor I
1,308 Views

Help writing Verilog code for addition - Calculator using FPGA

Hi. 

I am doing a project - Calculator using FPGA board.. 

however, i am facing problems writing the Verilog code for addition of numbers.. the input is in ascii code, which i need to convert into binary first, then carry out the addition, and finally reconvert it back to the ascii code.. so if someone knows how to write this code or has even some little idea about how to go through with this, please help me out..
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5 Replies
Altera_Forum
Honored Contributor I
123 Views

First I would suggest you create look up table that converts ascii to binary and back again. The addition of binary numbers will be straight forward.

Altera_Forum
Honored Contributor I
123 Views

Actually, I'm a novice at Verilog, so i don't really know about look up tables.. i tried googling too, but i didn't get anything worthwhile.. could you help me out with that too please?? 

Thanks :)
Altera_Forum
Honored Contributor I
123 Views

I'm more of a VHDL guy but it would be something like this. 

 

always @(posedge clk) 

begin 

case (ascii_value) 

h'30: binary_value = h'0; 

h'31: binary_value = h'1; 

... 

... 

... 

endcase 

end
Altera_Forum
Honored Contributor I
123 Views

i need a code to convert binary to decimal.. pls help

Altera_Forum
Honored Contributor I
123 Views

By nature, all digital logic quantities are binary. Decimals can be e.g. presented as binary coded decimal (BCD) numbers or 1 out of 10 decoded signal. You should specify the function of intended logic more exactly.

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