picorv32/testbench.cc

#include <iostream>

#include "Vpicorv32_wrapper.h"
#include "verilated_vcd_c.h"

int main(int argc, char** argv, char** env) {
  printf("Built with %s %s.\n", Verilated::productName(),
         Verilated::productVersion());
  printf("Recommended: Verilator 4.0 or later.\n");

  Verilated::commandArgs(argc, argv);
  Vpicorv32_wrapper* top = new Vpicorv32_wrapper;

  std::string hexfile;
  if (argc > 1) {
    hexfile = std::string(argv[1]);
  } else {
    hexfile = std::string("firmware/firmware.hex");
  }
  auto hex = (uint8_t*)(top->hex_file.data());
  auto csr = hexfile.c_str();
  for (int i = 0; i < hexfile.size(); i += 1) {
    *(hex + (128 - i)) = *(uint8_t*)(csr + i);
  }

  // Tracing (vcd)
  VerilatedVcdC* tfp = NULL;
  const char* flag_vcd = Verilated::commandArgsPlusMatch("vcd");
  if (flag_vcd && 0 == strcmp(flag_vcd, "+vcd")) {
    Verilated::traceEverOn(true);
    tfp = new VerilatedVcdC;
    top->trace(tfp, 99);
    tfp->open("testbench.vcd");
  }

  // Tracing (data bus, see showtrace.py)
  FILE* trace_fd = NULL;
  const char* flag_trace = Verilated::commandArgsPlusMatch("trace");
  if (flag_trace && 0 == strcmp(flag_trace, "+trace")) {
    trace_fd = fopen("testbench.trace", "w");
  }

  top->clk = 0;
  top->rst = 1;

  int t = 0;
  while (!Verilated::gotFinish()) {
    if (t > 200) top->rst = 0;
    top->clk = !top->clk;
    top->eval();
    if (tfp) tfp->dump(t);
    t += 5;
  }
  if (tfp) tfp->close();
  delete top;
  exit(0);
}