#include <stdio.h>
#include <stdlib.h>
#include "verilated.h"
#include "verilated_vcd_c.h"
#include "Vtop.h"

void	tick(int tickcount, Vtop *tb, VerilatedVcdC* tfp) {
	tb->eval();
	if (tfp)
		tfp->dump(tickcount * 10 - 2);
	tb->i_clk = 1;
	tb->eval();
	if (tfp)
		tfp->dump(tickcount * 10);
	tb->i_clk = 0;
	tb->eval();
	if (tfp) {
		tfp->dump(tickcount * 10 + 5);
		tfp->flush();
	}
}

int main(int argc, char **argv) {
	// Call commandArgs first!
	Verilated::commandArgs(argc, argv);

	// Instantiate our design
	Vtop *tb = new Vtop;
	Verilated::traceEverOn(true);
	VerilatedVcdC* tfp = new VerilatedVcdC;

	tb->trace(tfp, 00);
	tfp->open("build/waveform.vcd");

	unsigned tickcount = 0;
  int last_led = tb->o_led;

	for(int k=0; k<(1 << 12); k++) {
    tick(++tickcount, tb, tfp);

    if (last_led != tb->o_led) {
      printf("k = %7d, led = %d\n", k, tb->o_led);
    }

    last_led = tb->o_led;
	}
}