Add a Verilator driver

1 files changed, 35 insertions, 0 deletions

diff --git a/driver/verilator_main.cpp b/driver/verilator_main.cpp
new file mode 100644
index 0000000..4561158
--- /dev/null
+++ b/driver/verilator_main.cpp
@@ -0,0 +1,35 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include "Vmain.h"
+#include "verilated.h"
+
+int main(int argc, char **argv) {
+    // Initialize Verilators variables
+    Verilated::commandArgs(argc, argv);
+
+    // Create an instance of our module under test
+    Vmain *tb = new Vmain;
+
+    tb->clk = 0;
+    tb->start = 0;
+    tb->reset = 0;
+    tb->eval(); tb->clk = 1; tb->eval(); tb->clk = 0; tb->eval();
+    tb->reset = 1;
+    tb->eval(); tb->clk = 1; tb->eval(); tb->clk = 0; tb->eval();
+    tb->reset = 0;
+    tb->eval(); tb->clk = 1; tb->eval(); tb->clk = 0; tb->eval();
+
+    int cycles = 1;
+
+    // Tick the clock until we are done
+    while(!tb->finish) {
+        tb->clk = 1;
+        tb->eval();
+        tb->clk = 0;
+        tb->eval();
+        cycles++;
+    }
+
+    printf("cycles: %d\nfinished: %d\n", cycles, (unsigned)tb->return_val);
+    exit(EXIT_SUCCESS);
+}