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I want to fix a code in vhdl.i have to give the numbers from 0255 as input and i want to take in outout the nymbers in hex system in 2 seven segment display.
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i dont know how to do this..how i will present the naumbers in the 2 dispay??
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here you can find display patterns for the digits 0 to f used in HEX representation http://en.wikipedia.org/wiki/Sevensegment_display...
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I'm afraid your question is incomplete. So I'm now guessing:  I believe you have an eight bits wide unsigned input vector.  I also estimate that your seven segment displays are connected to your FPGA 1:1 and thus do not need to be multiplexed. If I'm right with both estimations, the simplest way for you to do it is the following:  In your thoughts, split up your eight bits wide vector into two four bits wide vectors, each of them serving one display.  For each fourbitvector, instantiate a truth table converting all input value patterns possible (0..15) into their correct representations on your display. I suppose you're a VHDL beginner. Here's a good tutorial: http://www.seas.upenn.edu/~ese171/vhdl/vhdl_primer.html The truth tables could be implemented with a SELECT or a CASE statement, for example. Patrick