split matrices

[mkokelma]

Hello,

I'm a beginner in vhdl. I use Mentor Graphics for programming VHDL.

I want to split a matrix.
For example
I have a port "in" with 6 rows, 110011.

I want to split it to 2 ports
The ports are: "en" with 2 rows and "opsel" with 4 rows.

The result must: en=11 and opsel=0011

How can I do this.
I have already tested:
en<=in (5 DOWNMTO 4);
opsel<= in (3 DOWNTO 0);

It didn't work in autologic II.

After synthesis the es an error with

Type mismatch ... netlist failed.

What can I do.

Thanks
Martin

 

[Nicolas Matringe]

mkokelma a écrit:

Hello,

I'm a beginner in vhdl. I use Mentor Graphics for programming VHDL.

I want to split a matrix.
For example
I have a port "in" with 6 rows, 110011.

'in' is a VHDL keyword, you can not use it to name a port, signal...

 

[mkokelma]

mkokelma a écrit:



'in' is a VHDL keyword, you can not use it to name a port, signal...

Oh sorry. I have meant "ein"

Martin

 

[mkokelma]

Hello,

I'm a beginner in vhdl. I use Mentor Graphics for programming VHDL.

I want to split a matrix.
For example
I have a port "in" with 6 rows, 110011.

I want to split it to 2 ports
The ports are: "en" with 2 rows and "opsel" with 4 rows.

The result must: en=11 and opsel=0011

How can I do this.
I have already tested:
en<=in (5 DOWNMTO 4);
opsel<= in (3 DOWNTO 0);

It didn't work in autologic II.

After synthesis the es an error with

Type mismatch ... netlist failed.

What can I do.

Thanks
Martin

Type mismatch in assignment to netlist ...
is the error I get. What is wrong?

Martin

 

[rickman]

Type mismatch in assignment to netlist ...
is the error I get. What is wrong?

How did you define ein and en? Are they compatible types?

--

Rick "rickman" Collins

(e-mail address removed)
Ignore the reply address. To email me use the above address with the XY
removed.

Arius - A Signal Processing Solutions Company
Specializing in DSP and FPGA design URL http://www.arius.com
4 King Ave 301-682-7772 Voice
Frederick, MD 21701-3110 301-682-7666 FAX

 

[mkokelma]

How did you define ein and en? Are they compatible types?

--Dekoder zur Auswahl der jeweiligen Funktionsbloecke von der ALU

This is the hole source from vhdl. This doesn't work in autologic II.
The comments are in german.

Martin


LIBRARY IEEE, ARITHMETIC;
USE IEEE.STD_LOGIC_1164.ALL;
USE ARITHMETIC.STD_LOGIC_ARITH.ALL;

ENTITY decoder IS
PORT (ein: IN STD_LOGIC_VECTOR (5 DOWNTO 0); --Eingangssignal
waehlt Funktion aus
en: OUT STD_LOGIC_VECTOR (1 DOWNTO 0); --enable-Signal zur Auswahl
des Funktionblocks
opsel: OUT STD_LOGIC_VECTOR (3 DOWNTO 0));

END decoder;

ARCHITECTURE behav OF decoder IS
SIGNAL fktsel: STD_LOGIC_VECTOR (1 DOWNTO 0);


BEGIN
fktsel <= ein (5 DOWNTO 4); --Funktionsauswahl der ALU
opsel <= ein (3 DOWNTO 0); --Operationsauswahl im
Funktionsblock selbst

--Auswahl der Funktion von der ALU
p1: PROCESS (fktsel)
BEGIN
CASE fktsel IS
WHEN "00" =>en<= "00"; --Auswahl der Funktion ADDER
WHEN "01" =>en<= "01"; --Auswahl der Funktion 2er-Komplement
WHEN "10" =>en<= "10"; --Auswahl der Funktion ROTATION
WHEN "11" =>en<= "11"; --Auswahl der Funktion LOGIK
WHEN OTHERS =>en<= "--";
END CASE;
END PROCESS p1;
END behav;