improve hello tests

2 files changed, 26 insertions, 15 deletions

diff --git a/tests/projects/embed/verilator/hello/src/main.v b/tests/projects/embed/verilator/hello/src/main.v
index 9661c433e..9bd2c43b5 100644
--- a/tests/projects/embed/verilator/hello/src/main.v
+++ b/tests/projects/embed/verilator/hello/src/main.v
@@ -1,7 +1,6 @@
 module hello;
   initial begin
     $display("hello world!");
-    $dumpfile("hello.vcd");
     $dumpvars(0, hello);
     $finish ;
   end
diff --git a/tests/projects/embed/verilator/hello/src/sim_main.cpp b/tests/projects/embed/verilator/hello/src/sim_main.cpp
index 95660029b..0aa763a0a 100644
--- a/tests/projects/embed/verilator/hello/src/sim_main.cpp
+++ b/tests/projects/embed/verilator/hello/src/sim_main.cpp
@@ -1,16 +1,28 @@
-  #include "hello.h"
-  #include "verilated.h"
+#include "hello.h"
+#include "verilated.h"
+#include "verilated_vcd_c.h"
 
-  double sc_time_stamp() {
-      return 0;
-  }
+double sc_time_stamp() {
+    return 0;
+}
 
-  int main(int argc, char** argv) {
-      VerilatedContext* contextp = new VerilatedContext;
-      contextp->commandArgs(argc, argv);
-      hello* top = new hello{contextp};
-      while (!contextp->gotFinish()) { top->eval(); }
-      delete top;
-      delete contextp;
-      return 0;
-  }
+int main(int argc, char** argv) {
+    char const* vcdfile = NULL;
+    if (argc == 2) {
+        vcdfile = argv[1];
+    } else {
+        printf("xmake run hello [vcdfile]\n");
+        return -1;
+    }
+    VerilatedContext* contextp = new VerilatedContext;
+    contextp->commandArgs(argc, argv);
+    hello* top = new hello{contextp};
+    VerilatedVcdC* tfp = new VerilatedVcdC;
+    top->trace(tfp, 99);
+    Verilated::traceEverOn(true);
+    tfp->open(vcdfile);
+    while (!contextp->gotFinish()) { top->eval(); }
+    delete top;
+    delete contextp;
+    return 0;
+}