Reorganize testbench a bit

rtl/tb/Makefile

@@ -1,9 +1,9 @@
 tests: test_adc
 
-test_adc: adc_driver_tb.vcd
+test_adc: vcd/adc_driver_tb.vcd
 
-adc_driver_tb.vcd: ./adc_driver_tb
-	./adc_driver_tb
+vcd/adc_driver_tb.vcd: bin/adc_driver_tb
+	./bin/adc_driver_tb
 	
-adc_driver_tb: adc_driver_tb.v ../library/adc_driver.v
-	iverilog adc_driver_tb.v ../library/adc_driver.v -o adc_driver_tb
+bin/adc_driver_tb: adc_driver_tb.v ../library/adc_driver.v
+	iverilog adc_driver_tb.v ../library/adc_driver.v -o bin/adc_driver_tb

rtl/tb/adc_driver_tb.v

@@ -45,7 +45,7 @@ initial begin
   configured = 0;
   out = 0;
 
-  $dumpfile("adc_driver_tb.vcd");
+  $dumpfile("vcd/adc_driver_tb.vcd");
   $dumpvars;
 end
 

rtl/tb/adc_test.cpp

@@ -1,37 +0,0 @@
-#include "Vadc_driver.h"
-#include "verilated.h"
-
-#include <memory>
-
-int main(int argc, char** argv, char** env) {
-  Verilated::commandArgs(argc, argv);
-  auto driver = std::unique_ptr<Vadc_driver>();
-  uint64_t tick = 0;
-  bool done = false;
-
-  driver->clk = 0;
-  driver->rstn = 1;
-  driver->adc_so = 0;
-  driver->ack = 0;
-
-  int sck_old = driver->sck;
-
-  while (!done) {
-    if (tick > 5) {
-      driver->rstn = 0;
-    }
-    if ((tick % 10) == 0) {
-      driver->clk = 1;
-    }
-    if ((tick % 10) == 5) {
-      driver->clk = 0;
-    }
-    driver->eval();
-    if (driver->sck & !sck_old) {
-    }
-    sck_old = driver->sck;
-    if (driver->vld) {
-    }
-  }
-  return 0;
-}