init

.gitignore

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+build/
+*.log
+*.sav
+*.gba
+*.lnk
+*.elf

Makefile

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+#---------------------------------------------------------------------------------
+.SUFFIXES:
+#---------------------------------------------------------------------------------
+
+ifeq ($(strip $(DEVKITARM)),)
+$(error "Please set DEVKITARM in your environment. export DEVKITARM=<path to>devkitARM")
+endif
+
+include $(DEVKITARM)/gba_rules
+
+#---------------------------------------------------------------------------------
+# the LIBGBA path is defined in gba_rules, but we have to define LIBTONC ourselves
+#---------------------------------------------------------------------------------
+LIBTONC := $(DEVKITPRO)/libtonc
+
+#---------------------------------------------------------------------------------
+# TARGET is the name of the output
+# BUILD is the directory where object files & intermediate files will be placed
+# SOURCES is a list of directories containing source code
+# INCLUDES is a list of directories containing extra header files
+# DATA is a list of directories containing binary data
+# GRAPHICS is a list of directories containing files to be processed by grit
+#
+# All directories are specified relative to the project directory where
+# the makefile is found
+#
+#---------------------------------------------------------------------------------
+TARGET		:= $(notdir $(CURDIR))
+BUILD		:= build
+SOURCES		:= src
+INCLUDES	:= inc
+DATA		:=
+MUSIC		:=
+GRAPHICS	:= graphics
+
+#---------------------------------------------------------------------------------
+# options for code generation
+#---------------------------------------------------------------------------------
+ARCH	:=	-mthumb -mthumb-interwork
+
+CFLAGS	:=	-g -Wall -O2\
+		-mcpu=arm7tdmi -mtune=arm7tdmi\
+		-std=c++20 \
+		$(ARCH)
+
+CFLAGS	+=	$(INCLUDE)
+
+CXXFLAGS:=	$(CFLAGS) -fno-rtti -fno-exceptions
+
+ASFLAGS	:=	-g $(ARCH)
+LDFLAGS	=	-g $(ARCH) -Wl,-Map,$(notdir $*.map)
+
+#---------------------------------------------------------------------------------
+# any extra libraries we wish to link with the project
+#---------------------------------------------------------------------------------
+LIBS	:= -lmm -ltonc
+
+
+#---------------------------------------------------------------------------------
+# list of directories containing libraries, this must be the top level containing
+# include and lib.
+# the LIBGBA path should remain in this list if you want to use maxmod
+#---------------------------------------------------------------------------------
+LIBDIRS	:=	$(LIBGBA) $(LIBTONC)
+
+#---------------------------------------------------------------------------------
+# no real need to edit anything past this point unless you need to add additional
+# rules for different file extensions
+#---------------------------------------------------------------------------------
+
+
+ifneq ($(BUILD),$(notdir $(CURDIR)))
+#---------------------------------------------------------------------------------
+
+export OUTPUT	:=	$(CURDIR)/$(TARGET)
+
+export VPATH	:=	$(foreach dir,$(SOURCES),$(CURDIR)/$(dir)) \
+			$(foreach dir,$(DATA),$(CURDIR)/$(dir)) \
+			$(foreach dir,$(GRAPHICS),$(CURDIR)/$(dir))
+
+export DEPSDIR	:=	$(CURDIR)/$(BUILD)
+
+CFILES		:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.c)))
+CPPFILES	:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.cpp)))
+SFILES		:=	$(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.s)))
+PNGFILES	:=	$(foreach dir,$(GRAPHICS),$(notdir $(wildcard $(dir)/*.png)))
+BINFILES	:=	$(foreach dir,$(DATA),$(notdir $(wildcard $(dir)/*.*)))
+
+ifneq ($(strip $(MUSIC)),)
+	export AUDIOFILES	:=	$(foreach dir,$(notdir $(wildcard $(MUSIC)/*.*)),$(CURDIR)/$(MUSIC)/$(dir))
+	BINFILES += soundbank.bin
+endif
+
+#---------------------------------------------------------------------------------
+# use CXX for linking C++ projects, CC for standard C
+#---------------------------------------------------------------------------------
+ifeq ($(strip $(CPPFILES)),)
+#---------------------------------------------------------------------------------
+	export LD	:=	$(CC)
+#---------------------------------------------------------------------------------
+else
+#---------------------------------------------------------------------------------
+	export LD	:=	$(CXX)
+#---------------------------------------------------------------------------------
+endif
+#---------------------------------------------------------------------------------
+
+export OFILES_BIN := $(addsuffix .o,$(BINFILES))
+
+export OFILES_SOURCES := $(CPPFILES:.cpp=.o) $(CFILES:.c=.o) $(SFILES:.s=.o)
+
+export OFILES_GRAPHICS := $(PNGFILES:.png=.o)
+
+export OFILES := $(OFILES_BIN) $(OFILES_SOURCES) $(OFILES_GRAPHICS)
+
+export HFILES := $(addsuffix .h,$(subst .,_,$(BINFILES))) $(PNGFILES:.png=.h)
+
+export INCLUDE	:=	$(foreach dir,$(INCLUDES),-iquote $(CURDIR)/$(dir)) \
+					$(foreach dir,$(LIBDIRS),-I$(dir)/include) \
+					-I$(CURDIR)/$(BUILD)
+
+export LIBPATHS	:=	$(foreach dir,$(LIBDIRS),-L$(dir)/lib)
+
+.PHONY: $(BUILD) clean
+
+#---------------------------------------------------------------------------------
+$(BUILD):
+	@[ -d $@ ] || mkdir -p $@
+	@$(MAKE) --no-print-directory -C $(BUILD) -f $(CURDIR)/Makefile
+
+#---------------------------------------------------------------------------------
+clean:
+	@echo clean ...
+	@rm -fr $(BUILD) $(TARGET).elf $(TARGET).gba
+
+
+#---------------------------------------------------------------------------------
+else
+
+#---------------------------------------------------------------------------------
+# main targets
+#---------------------------------------------------------------------------------
+
+$(OUTPUT).gba	:	$(OUTPUT).elf
+
+$(OUTPUT).elf	:	$(OFILES)
+
+$(OFILES_SOURCES) : $(HFILES)
+
+#---------------------------------------------------------------------------------
+# The bin2o rule should be copied and modified
+# for each extension used in the data directories
+#---------------------------------------------------------------------------------
+
+#---------------------------------------------------------------------------------
+# rule to build soundbank from music files
+#---------------------------------------------------------------------------------
+soundbank.bin soundbank.h : $(AUDIOFILES)
+#---------------------------------------------------------------------------------
+	@mmutil $^ -osoundbank.bin -hsoundbank.h
+
+#---------------------------------------------------------------------------------
+# This rule links in binary data with the .bin extension
+#---------------------------------------------------------------------------------
+%.bin.o	%_bin.h :	%.bin
+#---------------------------------------------------------------------------------
+	@echo $(notdir $<)
+	@$(bin2o)
+
+#---------------------------------------------------------------------------------
+# This rule creates assembly source files using grit
+# grit takes an image file and a .grit describing how the file is to be processed
+# add additional rules like this for each image extension
+# you use in the graphics folders
+#---------------------------------------------------------------------------------
+%.s %.h: %.png %.grit
+#---------------------------------------------------------------------------------
+	@echo "grit $(notdir $<)"
+	@grit $< -fts -o$*
+
+# make likes to delete intermediate files. This prevents it from deleting the
+# files generated by grit after building the GBA ROM.
+.SECONDARY:
+
+-include $(DEPSDIR)/*.d
+#---------------------------------------------------------------------------------------
+endif
+#---------------------------------------------------------------------------------------

compile_flags.txt

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+-I/opt/devkitpro/libtonc/include
+-I./inc/
+-I./build/

graphics/metr.grit

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+#
+# Metroid : 4bpp, not compressed. Only use the first 64 columns.
+#
+-gB4 -ar64

inc/camera.hpp

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+#include <cstdint>
+
+#ifndef CAMERA_HPP
+#define CAMERA_HPP
+
+class Camera {
+private:
+  std::uint32_t m_pos;
+
+public:
+  Camera();
+};
+
+#endif

src/camera.cpp

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+#include "Camera.hpp"
+
+Camera::Camera() : m_pos(0) {}

src/main.cpp

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+#include "Camera.hpp"
+#include <tonc.h>
+
+int main() {
+  irq_init(NULL);
+  irq_enable(II_VBLANK);
+
+  REG_DISPCNT = DCNT_MODE4;
+
+  while (1) {
+    VBlankIntrWait();
+  }
+}