mirror of
https://github.com/verilator/verilator.git
synced 2025-01-06 06:37:45 +00:00
85 lines
2.3 KiB
C++
85 lines
2.3 KiB
C++
// DESCRIPTION: Verilator Example: Top level main for invoking model
|
|
//
|
|
// Copyright 2003-2015 by Wilson Snyder. This program is free software; you can
|
|
// redistribute it and/or modify it under the terms of either the GNU
|
|
// Lesser General Public License Version 3 or the Perl Artistic License
|
|
// Version 2.0.
|
|
|
|
#include <verilated.h> // Defines common routines
|
|
#include "Vtop.h" // From Verilating "top.v"
|
|
#if VM_TRACE
|
|
# include <verilated_vcd_c.h> // Trace file format header
|
|
#endif
|
|
|
|
Vtop *top; // Instantiation of module
|
|
|
|
vluint64_t main_time = 0; // Current simulation time (64-bit unsigned)
|
|
|
|
double sc_time_stamp () { // Called by $time in Verilog
|
|
return main_time; // Note does conversion to real, to match SystemC
|
|
}
|
|
|
|
int main(int argc, char **argv, char **env) {
|
|
if (0 && argc && argv && env) {} // Prevent unused variable warnings
|
|
top = new Vtop; // Create instance of module
|
|
|
|
Verilated::commandArgs(argc, argv);
|
|
Verilated::debug(0);
|
|
|
|
#if VM_TRACE // If verilator was invoked with --trace
|
|
Verilated::traceEverOn(true); // Verilator must compute traced signals
|
|
VL_PRINTF("Enabling waves...\n");
|
|
VerilatedVcdC* tfp = new VerilatedVcdC;
|
|
top->trace (tfp, 99); // Trace 99 levels of hierarchy
|
|
tfp->open ("vlt_dump.vcd"); // Open the dump file
|
|
#endif
|
|
|
|
top->reset_l = 1; // Set some inputs
|
|
top->fastclk = 0;
|
|
top->clk = 0;
|
|
top->passed = 0;
|
|
|
|
while (main_time < 60 && !top->passed && !Verilated::gotFinish()) {
|
|
|
|
if ((main_time % 10) == 3) { // Toggle clock
|
|
top->clk = 1;
|
|
}
|
|
if ((main_time % 10) == 8) {
|
|
top->clk = 0;
|
|
}
|
|
if (main_time > 10) {
|
|
top->reset_l = 1; // Deassert reset
|
|
} else if (main_time > 1) {
|
|
top->reset_l = 0; // Assert reset
|
|
}
|
|
|
|
top->eval(); // Evaluate model
|
|
#if VM_TRACE
|
|
if (tfp) tfp->dump (main_time); // Create waveform trace for this timestamp
|
|
#endif
|
|
|
|
// Read outputs
|
|
VL_PRINTF ("[%" VL_PRI64 "d] %x %x %x %x %x_%08x_%08x\n",
|
|
main_time, top->clk, top->reset_l, top->passed,
|
|
top->out_small, top->out_wide[2], top->out_wide[1], top->out_wide[0]);
|
|
|
|
top->fastclk = !top->fastclk;
|
|
main_time++; // Time passes...
|
|
}
|
|
|
|
top->final();
|
|
|
|
#if VM_TRACE
|
|
if (tfp) tfp->close();
|
|
#endif
|
|
|
|
if (!top->passed) {
|
|
VL_PRINTF ("A Test failed\n");
|
|
abort();
|
|
} else {
|
|
VL_PRINTF ("All Tests passed\n");
|
|
}
|
|
|
|
exit(0L);
|
|
}
|