Merge PR #198 Incr frame size 640x480

Increase frame size to 640x480

sim_fpga/tutorial/readme.md

@@ -20,3 +20,9 @@ More info in its [tutorial 2 readme](./tut02)
 In this example, instead of processing still images, the frames from the computer camera is processed by the _verilated_ color processing Verilog module.
 
 More info in its [tutorial 3 readme](./tut03)
+
+## [Tutorial 4](./tut04)
+
+In this example, the video frame size has increased considerably, from 160x120 to 640x480. To test the performance with this size
+
+More info in its [tutorial 4 readme](./tut04)

sim_fpga/tutorial/tut03/rtl/color_proc.v

@@ -112,7 +112,7 @@ module color_proc
 
       // minimum number to consider an image detected and not being noise
       // change this value
-      c_min_colorpixels = 128,  // having 159744 pixels, 128 seems reasonable
+      c_min_colorpixels = 128,  // having 13312 pixels, 128 seems reasonable
 
     c_nb_buf_red   =  4,  // n bits for red in the buffer (memory)
     c_nb_buf_green =  4,  // n bits for green in the buffer (memory)

sim_fpga/tutorial/tut03/src/main.cpp

@@ -1,7 +1,7 @@
 // Authors:
 //  - Based on original version of David Lobato
 //  - Modified: Felipe Machado, https://github.com/felipe-m
-// Tutorial 2:
+// Tutorial 3:
 //   - includes centroid and proximity
 //   - the image is larger 160x120
 

sim_fpga/tutorial/tut04/Makefile

@@ -0,0 +1,64 @@
+MKFILE_PATH := $(abspath $(lastword $(MAKEFILE_LIST)))
+SIM_DIR := $(realpath $(dir $(MKFILE_PATH))/../..)
+PROJECT_DIR := $(realpath $(SIM_DIR)/..)
+IMGUI_DIR = $(PROJECT_DIR)/third_party/imgui
+EXAMPLE_DIR = $(SIM_DIR)/tutorial/tut04
+RTL_DIR = $(EXAMPLE_DIR)/rtl
+INC_DIR = $(EXAMPLE_DIR)/include
+SRC_DIR = $(EXAMPLE_DIR)/src
+ASSETS_DIR := $(SRC_DIR)
+SOURCES = $(SRC_DIR)/main.cpp
+SOURCES += $(IMGUI_DIR)/imgui.cpp $(IMGUI_DIR)/imgui_demo.cpp $(IMGUI_DIR)/imgui_draw.cpp $(IMGUI_DIR)/imgui_tables.cpp $(IMGUI_DIR)/imgui_widgets.cpp
+SOURCES += $(IMGUI_DIR)/backends/imgui_impl_sdl.cpp $(IMGUI_DIR)/backends/imgui_impl_opengl3.cpp
+V_SOURCES = $(RTL_DIR)/color_proc.v
+UNAME_S := $(shell uname -s)
+LINUX_GL_LIBS = -lGL
+
+CXXFLAGS = -I$(INC_DIR) -I$(IMGUI_DIR) -I$(IMGUI_DIR)/backends -DASSETS_DIR=\\\"$(ASSETS_DIR)\\\" -g
+LIBS =
+
+##---------------------------------------------------------------------
+## BUILD FLAGS PER PLATFORM
+##---------------------------------------------------------------------
+
+ifeq ($(UNAME_S), Linux) #LINUX
+	ECHO_MESSAGE = "Linux"
+	LIBS += $(LINUX_GL_LIBS) -ldl `sdl2-config --libs` `pkg-config --libs opencv4`
+
+	CXXFLAGS += `sdl2-config --cflags` `pkg-config --cflags opencv4`
+	CFLAGS = $(CXXFLAGS)
+endif
+
+ifeq ($(UNAME_S), Darwin) #APPLE
+	ECHO_MESSAGE = "Mac OS X"
+	LIBS += -framework OpenGL -framework Cocoa -framework IOKit -framework CoreVideo `sdl2-config --libs`
+	LIBS += -L/usr/local/lib -L/opt/local/lib
+
+	CXXFLAGS += `sdl2-config --cflags`
+	CXXFLAGS += -I/usr/local/include -I/opt/local/include
+	CFLAGS = $(CXXFLAGS)
+endif
+
+ifeq ($(OS), Windows_NT)
+    ECHO_MESSAGE = "MinGW"
+    LIBS += -lgdi32 -lopengl32 -limm32 `pkg-config --static --libs sdl2`
+
+    CXXFLAGS += `pkg-config --cflags sdl2`
+    CFLAGS = $(CXXFLAGS)
+endif
+
+##---------------------------------------------------------------------
+## BUILD RULES
+##---------------------------------------------------------------------
+
+all: obj_dir/Vcolor_proc
+	@echo Build complete for $(ECHO_MESSAGE)
+
+obj_dir/Vcolor_proc.h: $(V_SOURCES)
+	verilator --cc $(V_SOURCES) -x-assign unique --trace -CFLAGS "$(CXXFLAGS)" --exe $(SOURCES) -I$(RTL_DIR)
+
+obj_dir/Vcolor_proc: obj_dir/Vcolor_proc.h $(SOURCES)
+	make -j 4 -C obj_dir/ -f Vcolor_proc.mk Vcolor_proc LIBS="$(LIBS)"
+
+clean:
+	rm -rf obj_dir

sim_fpga/tutorial/tut04/readme.md

@@ -0,0 +1,16 @@
+# Verilator+GUI Tutorial 4
+
+This is the same as in Tutorial 3, but now taking a 640x480 image, to test if the processing is fast enough.
+Now, each frame is 307,200 pixels, so it is an order of magnitude larger than in tutorial 3
+
+The color processing is the same as in tutorial 3 and 2 (only changing some generics)
+
+* [../../../phys_fpga/ulx3s/apio/ov7670x2_colorcentroid_160x120/color_proc.v](../../../phys_fpga/ulx3s/apio/ov7670x2_colorcentroid_160x120/color_proc.v)
+
+The rest is the same as in tutorial 3.
+
+
+
+
+
+