Saeid Syd wrote:
> I have 3 errors in my VHDL project
And now we should find this bugs on our own?
What about telling us what the toolchain (btw: which one?) tells 
you?

It sounds like you give your car to a mechanic and tell him:
I have 3 problems with my car!

I already found a major design flaw:

1

use ieee.numeric_std.all;

2

USE IEEE.STD_LOGIC_ARITH.all;

3

use IEEE.STD_LOGIC_UNSIGNED.ALL;

This may not cause problems up to now, but with all those libs together 
you have some double definitions of data types.

My suggestion ist:
Do NOT ust the od std_logic_xxxx libs. Instead use solely the 
numeric_std. It has all you will need. Your teacher should tell you 
this...

And also this here is NOT a neat idea:

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      id_V2 : inout std_logic_vector (15 downto 0); 

2

      ...

3

      trame_moins_CS : inout natural

Use INOUT solely for real bidirectional ports. Do NOT use it for 
lazyness to read back a OUT port in you design.

And also this here is not nice:

1

      trame_moins_CS : inout natural

2

   : 

3

   :

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  signal adresse : integer;

5

6

  --signal trame_moins_CS : natural;

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  signal taille_data : natural ;

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  signal taille_trame : integer ;

You should not use an integer without a RANGE. Otherwise the simulator 
cannot find a overflow...

Thanks a lot, you made my day, i'm going to check it.