CONV_INTEGER problems

[Giox]

Hello everybody, I have the followin code:

LIBRARY ieee;

USE ieee.std_logic_1164.all;
USE ieee.std_logic_arith.all

......SNIP.....
signal high_registered : std_logic_vector(1 downto 0);
signal high_current : std_logic_vector(1 downto 0);

......SNIP.....

busy_condition <= '1' WHEN CONV_INTEGER(high_registered) >
CONV_INTEGER(high_current)
ELSE '0';
......SNIP.....

During simulation:
high_registered "10";
high_current "00";

The resulting busy_condition is Z.... what's wrong?
Any help will be appreciated
Gio

 

[Arnaud]

I suggest that you simply used a conversion to unsigned instead of the
non standard function conv_integer:

busy_condition <= '1' WHEN unsigned(high_registered) >
unsigned(high_current)
ELSE '0';

I also suggest that you used library ieee.numeric_std.all; instead of
ieee.std_logic_arith.all;

Regards,

Arnaud

 

[anupam]

hi,
The library arith has both signed and unsigned defined in it so while
converting to interger ,you need to specify that your std_logic is
signed or unsigned ....

Just include "use ieee.std_logic_unsigned.all" or "use
ieee.std_signed.all" to make it happen

regards,
Anupam Jain

 

[Giox]

Thanks a lot now it works !