ModelSim SE User's Manual - Electrical and Computer Engineering

VPI example
The following example is a trivial, but complete VPI application. A general VPI example
can be found in /modeltech/examples/vpi.
hello.c:
#include "vpi_user.h"
static PLI_INT32 hello(PLI_BYTE8 * param)
{
vpi_printf( "Hello world!\n" );
return 0;
}
void RegisterMyTfs( void )
{
s_vpi_systf_data systf_data;
vpiHandle systf_handle;
systf_data.type = vpiSysTask;
systf_data.sysfunctype = vpiSysTask;
systf_data.tfname = "$hello";
systf_data.calltf = hello;
systf_data.compiletf = 0;
systf_data.sizetf = 0;
systf_data.user_data = 0;
systf_handle = vpi_register_systf( &systf_data );
vpi_free_object( systf_handle );
}
void (*vlog_startup_routines[])() = {
RegisterMyTfs,
0
};
hello.v:
module hello;
initial $hello;
endmodule
Compile the VPI code for the Solaris operating system:
% gcc -c -I/include hello.c
% ld -G -o hello.sl hello.o
Compile the Verilog code:
% vlib work
% vlog hello.v
Simulate the design:
% vsim -c -pli hello.sl hello
# Loading work.hello
# Loading ./hello.sl
VSIM 1> run -all
# Hello world!
VSIM 2> quit
VPI example UM-583
ModelSim SE User’s Manual