Add a more accurate delay between the additions and multiplications

Author: jgavillalobos

modules/edge-detector/include/sobel_edge_detector_at_model.hpp

@@ -11,6 +11,11 @@ SC_MODULE(Edge_Detector)
   sc_inout<sc_uint<64>> data;
   sc_in<sc_uint<24>> address;
 
+  const double delay_full_adder_1_bit = 0.361;
+  const double delay_full_adder = delay_full_adder_1_bit * 16;
+  
+  const double delay_multiplier = 9.82;
+  
   const sc_int<16> sobelGradientX[3][3] = {{-1,  0,  1},
                                            {-2,  0,  2},
                                            {-1,  0,  1}};

modules/edge-detector/src/sobel_edge_detector_at_model.cpp

@@ -92,7 +92,7 @@ void Edge_Detector::compute_sobel_gradient_x()
   {
     wait(gotLocalWindow);
 
-    mult_x.notify(20, SC_NS);
+    mult_x.notify(delay_multiplier, SC_NS);
   }
 }
 
@@ -102,7 +102,7 @@ void Edge_Detector::compute_sobel_gradient_y()
   {
     wait(gotLocalWindow);
 
-    mult_y.notify(20, SC_NS);
+    mult_y.notify(delay_multiplier, SC_NS);
   }
 }
 
@@ -120,7 +120,7 @@ void Edge_Detector::perform_mult_gradient_x()
       }
     }
 
-    sum_x.notify(10, SC_NS);
+    sum_x.notify(delay_full_adder, SC_NS);
   }
 }
 
@@ -138,7 +138,7 @@ void Edge_Detector::perform_mult_gradient_y()
       }
     }
 
-    sum_y.notify(10, SC_NS);
+    sum_y.notify(delay_full_adder, SC_NS);
   }
 }
 

modules/edge-detector/src/tb_edge_detector.cpp

@@ -55,7 +55,7 @@ int sc_main(int, char*[])
 
   // Open VCD file
   sc_trace_file* wf = sc_create_vcd_trace_file("edge_detector");
-  wf->set_time_unit(1, SC_NS);
+  wf->set_time_unit(1, SC_PS);
 
   Edge_Detector edge_detector("edge_detector");
 #ifdef EDGE_DETECTOR_AT_EN
@@ -240,7 +240,7 @@ int sc_main(int, char*[])
       edge_detector.write();
       sc_start(10, SC_NS);
 
-      sc_start(80, SC_NS);
+      sc_start(20, SC_NS);
 
       address = SOBEL_OUTPUT;
       edge_detector.read();