Forum Discussion
Altera_Forum
Honored Contributor
Honored Contributorfloating point operating in vhdl (fixed_pkg)
Hi all;
I have write a code using fixed_pkg. It compile successfully in quartus, but when I try to simulate in ModelSim an error occur. --------------------------------------------------------------------------------------------------------------- library ieee; library ieee_proposed; use work.fixed_pkg.all; use ieee.numeric_std.all; entity fix is port (clk: in bit; nprev: in integer range -127 to 127; ip1: out ufixed (8 downto -9)); end fix; architecture fix of fix is signal n1: ufixed (4 downto -4); begin process(clk) begin if (clk'event and clk='1') then ip1 <= (to_ufixed(0.483,n1)) * (to_ufixed(11,n1)); end if; end process; end fix; ---------------------------------------------------------------------------------------------- This is the error in ModelSim:# Compile of fix.vhd failed with 2 errors.# Compile of fix_tb.vhd failed with 2 errors.# Compile of fixed_float_types_c.vhdl was successful.# Compile of fixed_pkg_c.vhdl failed with 1 errors.# Compile of fixed_synth.vhdl failed with 2 errors. This the error when I expand it: ** Error: H:/altera/mul_try_tb/fix_tb.vhd(2): Library ieee_proposed not found. I have add all the fixed_pkg in the project (in quartus). Need your helps..17 Replies
Altera_Forumif you just run vcom it will add it to the work libarary. To add a file to the specific library, you need the -work option
vcom fixed_float_types_c.vhdl -work ieee_proposed vcom fixed_pkg_c.vhdl -work ieee_proposed- Altera_Forum
I write in the modelsim command window for create the ieee_proposed;
vlib ieee_propose vcom vcom fixed_float_types_c.vhdl vcom fixed_pkg_c.vhdl There are no error for line 1 and 2. But, in line 3 this error occur:# ** Error: (vcom-11) Could not find ieee_proposed.fixed_float_types.# ** Error: fixed_pkg_c.vhdl(23): (vcom-1195) Cannot find expanded name "ieee_proposed.fixed_float_types".# ** Error: fixed_pkg_c.vhdl(23): Unknown expanded name.# ** Error: fixed_pkg_c.vhdl(25): VHDL Compiler exiting# C:/altera/10.1/modelsim_ase/win32aloem/vcom failed. What my false?..thanks for reply - Altera_Forum
on the modelsim command window (or in a tcl or do file):
vlib floatfixlib vcom fixed_float_types_c.vhdl -work floatfixlib vcom fixed_pkg_c.vhdl -work floatfixlib etc. - Altera_Forum
How to create the floatfixlib? Do you have any other idea for avoid the error..
thanks for reply - Altera_Forum
you will need to create the floatfixlib, as I dont think the starter edition ships with it.
- Altera_Forum
I use ModelSim Altera Starter Edition 6.6d..After I remove the ieee_proposed library, this error occur in ModelSim:
** Error: H:/altera/mul_try_tb/fix.vhd(3): Library floatfixlib not found. ** Error: H:/altera/mul_try_tb/fix.vhd(4): (vcom-1136) Unknown identifier "floatfixlib". Thanks for reply - Altera_Forum
what version of modelsim?
newer versions of modelsim have the fixed_pkg in the floatfixlib library, so I would delete all references to ieee_proposed and the fixed_pkg in the work library.
