I have been using Xilinx ISE 10.1 on windows sofar but I'm running into some
weird problems with CoolRunner and I wanted to try compiling with something
other than Xilinx' tools.
Xilinx ISE steps are:
synthesize - xst
translate
fit
generate programming file
I'm not sure exactly where ghdl fits in.
Obviously, ghdl can compile vhd files, but at which stage do I need to go back
to xilinx? I do understand that as one of the last steps, I *have* to use
Xilinx utility in order to generate the .jed file and for actually programming
the xilinx.
Terminology is a bit confusing... analyze, elaborate, run?
As a first attempt, I tried to analyze a vhd file but it failed with:
cannot find resource library "unisim"
I tried to use the -PPATH but it just won't work.
I believe the xilinx libraries are in \Xilinx\10.1\ISE\vhdl\hdp\nt folder which
has the following subdirs:
aim, cpld, ieee ... unisim, xilinxcorelib
I tried adding the following path, but it still wouldn't find unisim:
ghdl -a --workdir=test -P\Xilinx\10.1\ISE\vhdl\hdp\nt myfile.vhd
inside the vhd file, the following references are near the top:
library ieee;
use ieee.std_logic_1164.ALL;
use ieee.numeric_std.ALL;
library UNISIM;
use UNISIM.Vcomponents.ALL;
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