#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");

   // initial state
   tb->i_resetN = 1;
   tb->i_startN = 1;
   tb->i_stopN = 1;
   unsigned tickcount = 0;
   for (int k = 0; k < 2; k++) 
      tick(++tickcount, tb, tfp);

   // reset pulse, then wait for a few clock cycles
   tb->i_resetN = 0;
   tick(++tickcount, tb, tfp);
   tb->i_resetN = 1;

   for (int k = 0; k < 3; k++) 
      tick(++tickcount, tb, tfp);

   // relevant const
   const unsigned int main_clk_Hz = 100 * 1000 * 1000; // 100 MHz
   const unsigned int db_clk_Hz = 10; // 10 ms -> 10 Hz
   const unsigned int db_ticks = main_clk_Hz / db_clk_Hz;

   // tb->i_calib_delay = 20;
   // start pulse
   tb->i_startN = 0;
   tick(++tickcount, tb, tfp);
   tb->i_startN = 1;

   // for (int k = 0; k < tb->i_calib_delay + 10; k++) 
      tick(++tickcount, tb, tfp);

   for (int k = 0; k < (1<<16); k++) 
      tick(++tickcount, tb, tfp);

   tb->i_resetN = 0;
   tick(++tickcount, tb, tfp);
   tb->i_resetN = 1;

   for (int k = 0; k < 30; k++) 
      tick(++tickcount, tb, tfp);
}