Modifications to GHDL VPI Examples

This was a quick experiment to take the cver VPI implementation, compile it and load it in GHDL. The experiment was successful but was a very limited experiment. Although the VPI was loaded successfully nothing from the VPI interface was accessed. Need to do some more experiments to test feasibility of the VPI interface.

All source available here.

CC=gcc
CFLAGS=-Wall -g -I.
 
all: run-vpi
 
myhdl_vpi.o: myhdl_vpi.c
	$(CC) -c -fPIC $(CFLAGS) myhdl_vpi.c
 
myhdl.vpi: myhdl_vpi.o
	$(CC) --shared -o myhdl.vpi myhdl_vpi.o
 
disptree: 
	ghdl -a disptree.vhdl
	ghdl -e -Wl,-Wl,-E disptree
 
run-vpi: myhdl.vpi disptree
	./disptree --vpi=./myhdl.vpi
 
 
clean:
	rm -f myhdl_vpi.vpi
	rm -f *.o
 
tar:
	tar cvf vpi-ex-ghdl.tar myhdl_vpi.c Makefile vpi_user.h