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---
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*/build
*.nds
*.elf
*.cia
*.DS_Store
.vscode

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{
"configurations": [
{
"name": "Mac",
"includePath": [
"${workspaceFolder}/**",
"/opt/devkitpro/libnds/include/**",
"/opt/devkitpro/devkitARM/include/**",
"/opt/devkitpro/devkitARM/arm-none-eabi/include/**"
],
"defines": [
"ARM9",
"VER_NUMBER=\"vX.X\""
],
"macFrameworkPath": [],
"compilerPath": "/opt/devkitpro/devkitARM/bin/arm-none-eabi-g++",
"cStandard": "c11",
"cppStandard": "c++20",
"intelliSenseMode": "gcc-x64",
"forcedInclude": [
"/opt/devkitpro/libnds/include/nds/arm9/input.h",
"/opt/devkitpro/devkitARM/arm-none-eabi/include/sys/unistd.h"
],
"browse": {
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{
// See https://go.microsoft.com/fwlink/?LinkId=733558
// for the documentation about the tasks.json format
"version": "2.0.0",
"tasks": [
{
"label": "Make",
"command": "make",
"args": ["-s"],
"group": {
"kind": "build"
},
"presentation": {
"reveal": "silent"
},
"problemMatcher": "$gcc"
}
]
}

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PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.
17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

62
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#---------------------------------------------------------------------------------
.SUFFIXES:
#---------------------------------------------------------------------------------
ifeq ($(strip $(DEVKITARM)),)
$(error "Please set DEVKITARM in your environment. export DEVKITARM=<path to>devkitARM")
endif
export TARGET := dsi-camera
export TOPDIR := $(CURDIR)
# specify a directory which contains the nitro filesystem
# this is relative to the Makefile
NITRO_FILES :=
# These set the information text in the nds file
GAME_TITLE := DSi camera test
GAME_SUBTITLE1 := Pk11
include $(DEVKITARM)/ds_rules
.PHONY: checkarm7 checkarm9 clean
#---------------------------------------------------------------------------------
# main targets
#---------------------------------------------------------------------------------
all: checkarm7 checkarm9 $(TARGET).nds
#---------------------------------------------------------------------------------
checkarm7:
$(MAKE) -C arm7
#---------------------------------------------------------------------------------
checkarm9:
$(MAKE) -C arm9
#---------------------------------------------------------------------------------
$(TARGET).nds : $(NITRO_FILES) arm7/$(TARGET).elf arm9/$(TARGET).elf
ndstool -c $(TARGET).nds -7 arm7/$(TARGET).elf -9 arm9/$(TARGET).elf \
-b $(GAME_ICON) "$(GAME_TITLE);$(GAME_SUBTITLE1)" \
$(_ADDFILES)
#---------------------------------------------------------------------------------
arm7/$(TARGET).elf:
$(MAKE) -C arm7
#---------------------------------------------------------------------------------
arm9/$(TARGET).elf:
$(MAKE) -C arm9
#---------------------------------------------------------------------------------
clean:
$(MAKE) -C arm9 clean
$(MAKE) -C arm7 clean
rm -f $(TARGET).nds $(TARGET).arm7 $(TARGET).arm9
cppcheck:
$(MAKE) -C arm7 cppcheck
$(MAKE) -C arm9 cppcheck
format:
$(MAKE) -C arm7 format
$(MAKE) -C arm9 format

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# DSi camera test
This is an attempt to make a homebrew app that can use the DSi's cameras. Currently it reads and prints a camera's ID, and tries to initialize the outer camera and display it on the top screen, but is just showing a black screen...
Credits to:
- [devkitPro](https://github.com/devkitPro) for devkitARM and libnds
- [nocash](https://problemkaputt.de) for GBATek

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#---------------------------------------------------------------------------------
.SUFFIXES:
#---------------------------------------------------------------------------------
ifeq ($(strip $(DEVKITARM)),)
$(error "Please set DEVKITARM in your environment. export DEVKITARM=<path to>devkitARM")
endif
include $(DEVKITARM)/ds_rules
#---------------------------------------------------------------------------------
# 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 files
# all directories are relative to this makefile
#---------------------------------------------------------------------------------
BUILD := build
SOURCES := source
INCLUDES := include build
DATA :=
#---------------------------------------------------------------------------------
# options for code generation
#---------------------------------------------------------------------------------
ARCH := -mthumb-interwork
CFLAGS := -g -Wall -O2\
-mcpu=arm7tdmi -mtune=arm7tdmi -fomit-frame-pointer\
-ffast-math \
$(ARCH)
CFLAGS += $(INCLUDE) -DARM7
CXXFLAGS := $(CFLAGS) -fno-rtti -fno-exceptions -fno-rtti
ASFLAGS := -g $(ARCH)
LDFLAGS = -specs=ds_arm7.specs -g $(ARCH) -Wl,--nmagic -Wl,-Map,$(notdir $*).map
LIBS := -ldswifi7 -lmm7 -lnds7
#---------------------------------------------------------------------------------
# list of directories containing libraries, this must be the top level containing
# include and lib
#---------------------------------------------------------------------------------
LIBDIRS := $(LIBNDS)
#---------------------------------------------------------------------------------
# no real need to edit anything past this point unless you need to add additional
# rules for different file extensions
#---------------------------------------------------------------------------------
ifneq ($(BUILD),$(notdir $(CURDIR)))
#---------------------------------------------------------------------------------
export ARM7ELF := $(CURDIR)/$(TARGET).elf
export DEPSDIR := $(CURDIR)/$(BUILD)
export VPATH := $(foreach dir,$(SOURCES),$(CURDIR)/$(dir))
CFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.c)))
CPPFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.cpp)))
SFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.s)))
BINFILES := $(foreach dir,$(DATA),$(notdir $(wildcard $(dir)/*.*)))
export OFILES := $(addsuffix .o,$(BINFILES)) \
$(CPPFILES:.cpp=.o) $(CFILES:.c=.o) $(SFILES:.s=.o)
export INCLUDE := $(foreach dir,$(INCLUDES),-I$(CURDIR)/$(dir)) \
$(foreach dir,$(LIBDIRS),-I$(dir)/include) \
-I$(CURDIR)/$(BUILD)
export LIBPATHS := $(foreach dir,$(LIBDIRS),-L$(dir)/lib)
#---------------------------------------------------------------------------------
# use CXX for linking C++ projects, CC for standard C
#---------------------------------------------------------------------------------
ifeq ($(strip $(CPPFILES)),)
#---------------------------------------------------------------------------------
export LD := $(CC)
#---------------------------------------------------------------------------------
else
#---------------------------------------------------------------------------------
export LD := $(CXX)
#---------------------------------------------------------------------------------
endif
#---------------------------------------------------------------------------------
.PHONY: $(BUILD) clean
#---------------------------------------------------------------------------------
$(BUILD):
@[ -d $@ ] || mkdir -p $@
@$(MAKE) --no-print-directory -C $(BUILD) -f $(CURDIR)/Makefile
#---------------------------------------------------------------------------------
clean:
@echo clean ...
@rm -fr $(BUILD) *.elf
#---------------------------------------------------------------------------------
else
DEPENDS := $(OFILES:.o=.d)
#---------------------------------------------------------------------------------
# main targets
#---------------------------------------------------------------------------------
$(ARM7ELF) : $(OFILES)
@echo linking $(notdir $@)
@$(LD) $(LDFLAGS) $(OFILES) $(LIBPATHS) $(LIBS) -o $@
#---------------------------------------------------------------------------------
# you need a rule like this for each extension you use as binary data
#---------------------------------------------------------------------------------
%.bin.o : %.bin
#---------------------------------------------------------------------------------
@echo $(notdir $<)
@$(bin2o)
-include $(DEPENDS)
#---------------------------------------------------------------------------------------
endif
#---------------------------------------------------------------------------------------
cppcheck:
@rm -f ../cppcheck.log
@cppcheck . --enable=all $(INCLUDE) -UJSON_CATCH_USER -U_Check_return_ -U_MSC_VER -U_Ret_notnull_ -U__INTEL_COMPILER -U__PGI -U__SUNPRO_CC -UJSON_INTERNAL_CATCH_USER -UJSON_THROW_USER -UJSON_TRY_USER -U__IBMCPP__ -U__SUNPRO_CC -D__GNUC__=9 -D__GNUC_MINOR__=1 -DNULL=nullptr --force 2> ../cppcheck.log
@echo build/cppcheck.log file created...
format:
clang-format -i -style=file $(foreach dir,$(SOURCES),$(wildcard $(dir)/*.c) $(wildcard $(dir)/*.cpp) $(wildcard $(dir)/*.hpp) $(wildcard $(dir)/*.h)) $(foreach dir,$(INCLUDES),$(wildcard $(dir)/*.h) $(wildcard $(dir)/*.hpp))

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#ifndef APTINA_H
#define APTINA_H
#include <nds.h>
void init(u8 device);
void activate(u8 device);
void deactivate(u8 device);
#endif

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#ifndef APTINA_I2C_H
#define APTINA_I2C_H
#include <nds.h>
#include <nds/arm7/i2c.h>
enum i2cFlags { I2C_NONE = 0x00, I2C_STOP = 0x01, I2C_START = 0x02, I2C_READ = 0x20 };
u8 aptWriteRegister(u8 device, u16 reg, u16 data);
u16 aptReadRegister(u8 device, u16 reg);
#endif

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#ifndef I2C_HANDLER_H
#define I2C_HANDLER_H
void checkFifo();
#endif

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#include "aptina.h"
#include "aptina_i2c.h"
// Waits until the bits of the register are clear
void aptWaitClr(u8 device, u16 reg, u16 mask) {
while(aptReadRegister(device, reg) & mask) {
swiWaitForVBlank();
}
}
// Waits until the bits of the register are set
void aptWaitSet(u8 device, u16 reg, u16 mask) {
while((aptReadRegister(device, reg) & mask) != mask) {
swiWaitForVBlank();
}
}
// Clears the bits in the mask at the register
void aptClr(u8 device, u16 reg, u16 mask) {
u16 temp = aptReadRegister(device, reg);
aptWriteRegister(device, reg, temp & ~mask);
}
// Sets the bits in the mask at the register
void aptSet(u8 device, u16 reg, u16 mask) {
u16 temp = aptReadRegister(device, reg);
aptWriteRegister(device, reg, temp | mask);
}
// Reads an MCU value
u16 aptReadMcu(u8 device, u16 reg) {
aptWriteRegister(device, 0x098C, reg);
return aptReadRegister(device, 0x0990);
}
// Writes an MCU value
void aptWriteMcu(u8 device, u16 reg, u16 data) {
aptWriteRegister(device, 0x098C, reg);
aptWriteRegister(device, 0x0990, data);
}
// Waits until the bits of the MCU register are clear
void aptWaitMcuClr(u8 device, u16 reg, u16 mask) {
while(aptReadMcu(device, reg) & mask) {
swiWaitForVBlank();
}
}
// Sets the bits in the mask at the MCU register
void aptSetMcu(u8 device, u16 reg, u16 mask) {
u16 temp = aptReadMcu(device, reg);
aptWriteMcu(device, reg, temp | mask);
}
// https://problemkaputt.de/gbatek.htm#dsiaptinacamerainitialization
void init(u8 device) {
bool xflip = false;
aptWriteRegister(device, 0x001A, 0x0003); // RESET_AND_MISC_CONTROL (issue reset) ;\reset
aptWriteRegister(device, 0x001A, 0x0000); // RESET_AND_MISC_CONTROL (release reset) ;/
aptWriteRegister(device, 0x0018, 0x4028); // STANDBY_CONTROL (wakeup) ;\.
aptWriteRegister(device, 0x001E, 0x0201); // PAD_SLEW ; wakeup
aptWriteRegister(device, 0x0016, 0x42DF); // CLOCKS_CONTROL ;
aptWaitClr(device, 0x0018, 0x4000); // STANDBY_CONTROL (wait for WakeupDone) ;
aptWaitSet(device, 0x301A, 0x0004); // UNDOC_CORE_301A (wait for WakeupDone) ;/
aptWriteMcu(device, 0x002F0, 0x0000); // UNDOC! RAM?
aptWriteMcu(device, 0x002F2, 0x0210); // UNDOC! RAM?
aptWriteMcu(device, 0x002F4, 0x001A); // UNDOC! RAM?
aptWriteMcu(device, 0x02145, 0x02F4); // UNDOC! SEQ?
aptWriteMcu(device, 0x0A134, 0x0001); // UNDOC! SEQ?
aptSetMcu(device, 0xA115, 0x0002); // SEQ_CAP_MODE (set bit1=video)
aptWriteMcu(device, 0x2755, 0x0002); // MODE_OUTPUT_FORMAT_A (bit5=0=YUV) ;\select
aptWriteMcu(device, 0x2757, 0x0002); // MODE_OUTPUT_FORMAT_B ;/YUV mode
aptWriteRegister(device, 0x0014, 0x2145); // PLL_CONTROL ;\.
aptWriteRegister(device, 0x0010, 0x0111); // PLL_DIVIDERS ; match
aptWriteRegister(device, 0x0012, 0x0000); // PLL_P_DIVIDERS ; PLL
aptWriteRegister(device, 0x0014, 0x244B); // PLL_CONTROL ; to DSi
aptWriteRegister(device, 0x0014, 0x304B); // PLL_CONTROL ; timings
aptWaitSet(device, 0x0014, 0x8000); // PLL_CONTROL (wait for PLL Lock okay) ;
aptClr(device, 0x0014, 0x0001); // PLL_CONTROL (disable PLL Bypass) ;/
aptWriteMcu(device, 0x2703, 0x0100); // MODE_OUTPUT_WIDTH_A ;\Size A
aptWriteMcu(device, 0x2705, 0x00C0); // MODE_OUTPUT_HEIGHT_A ;/ 256x192
aptWriteMcu(device, 0x2707, 0x0280); // MODE_OUTPUT_WIDTH_B ;\Size B
aptWriteMcu(device, 0x2709, 0x01E0); // MODE_OUTPUT_HEIGHT_B ;/ 640x480
aptWriteMcu(device, 0x2715, 0x0001); // MODE_SENSOR_ROW_SPEED_A ;\.
aptWriteMcu(device, 0x2719, 0x001A); // MODE_SENSOR_FINE_CORRECTION_A ;
aptWriteMcu(device, 0x271B, 0x006B); // MODE_SENSOR_FINE_IT_MIN_A ; Sensor A
aptWriteMcu(device, 0x271D, 0x006B); // MODE_SENSOR_FINE_IT_MAX_MARGIN_A ;
aptWriteMcu(device, 0x271F, 0x02C0); // MODE_SENSOR_FRAME_LENGTH_A ;
aptWriteMcu(device, 0x2721, 0x034B); // MODE_SENSOR_LINE_LENGTH_PCK_A ;/
aptWriteMcu(device, 0xA20B, 0x0000); // AE_MIN_INDEX ;\AE min/max
aptWriteMcu(device, 0xA20C, 0x0006); // AE_MAX_INDEX ;/
aptWriteMcu(device, 0x272B, 0x0001); // MODE_SENSOR_ROW_SPEED_B ;\.
aptWriteMcu(device, 0x272F, 0x001A); // MODE_SENSOR_FINE_CORRECTION_B ;
aptWriteMcu(device, 0x2731, 0x006B); // MODE_SENSOR_FINE_IT_MIN_B ; Sensor B
aptWriteMcu(device, 0x2733, 0x006B); // MODE_SENSOR_FINE_IT_MAX_MARGIN_B ;
aptWriteMcu(device, 0x2735, 0x02C0); // MODE_SENSOR_FRAME_LENGTH_B ;
aptWriteMcu(device, 0x2737, 0x034B); // MODE_SENSOR_LINE_LENGTH_PCK_B ;/
aptSet(device, 0x3210, 0x0008); // COLOR_PIPELINE_CONTROL (PGA pixel shading..)
aptWriteMcu(device, 0xA208, 0x0000); // UNDOC! RESERVED_AE_08
aptWriteMcu(device, 0xA24C, 0x0020); // AE_TARGETBUFFERSPEED
aptWriteMcu(device, 0xA24F, 0x0070); // AE_BASETARGET
if(device == I2C_CAM0) { // ;\.
aptWriteMcu(device, 0x2717, 0x0024); // MODE_SENSOR_READ_MODE_A ; Read Mode
aptWriteMcu(device, 0x272D, 0x0024); // MODE_SENSOR_READ_MODE_B ; with x-flip
} else if(xflip) { // ; on internal
aptWriteMcu(device, 0x2717, 0x0025); // MODE_SENSOR_READ_MODE_A ; camera
aptWriteMcu(device, 0x272D, 0x0025); // MODE_SENSOR_READ_MODE_B ;/
}
if(device == I2C_CAM0) { // ;\.
aptWriteMcu(device, 0xA202, 0x0022); // AE_WINDOW_POS ;
aptWriteMcu(device, 0xA203, 0x00BB); // AE_WINDOW_SIZE ;
} else { // ;
aptWriteMcu(device, 0xA202, 0x0000); // AE_WINDOW_POS ;
aptWriteMcu(device, 0xA203, 0x00FF); // AE_WINDOW_SIZE ;/
}
aptSet(device, 0x0016, 0x0020); // CLOCKS_CONTROL (set bit5=1, reserved)
aptWriteMcu(device, 0xA115, 0x0072); // SEQ_CAP_MODE (was already manipulated above)
aptWriteMcu(device, 0xA11F, 0x0001); // SEQ_PREVIEW_1_AWB ;\.
if(device == I2C_CAM0) { // ;
aptWriteRegister(device, 0x326C, 0x0900); // ;APERTURE_PARAMETERS ;
aptWriteMcu(device, 0xAB22, 0x0001); // HG_LL_APCORR1 ;
} else { // ;
aptWriteRegister(device, 0x326C, 0x1000); // APERTURE_PARAMETERS ;
aptWriteMcu(device, 0xAB22, 0x0002); // HG_LL_APCORR1 ;/.
}
aptWriteMcu(device, 0xA103, 0x0006); // SEQ_CMD (06h=RefreshMode)
aptWaitMcuClr(device, 0xA103, 0x000F); // SEQ_CMD (wait above to become ZERO)
aptWriteMcu(device, 0xA103, 0x0005); // SEQ_CMD (05h=Refresh)
aptWaitMcuClr(device, 0xA103, 0x000F); // SEQ_CMD (wait above to become ZERO)
}
void activate(u8 device) {
aptClr(device, 0x0018, 0x0001); // STANDBY_CONTROL (bit0=0=wakeup) ;\.
aptWaitClr(device, 0x0018, 0x4000); // STANDBY_CONTROL (wait for WakeupDone) ; Wakeup
aptWaitSet(device, 0x301A, 0x0004); // UNDOC_CORE_301A (wait for WakeupDone) ;/
aptWriteRegister(
device, 0x3012, 0x0010); // COARSE_INTEGRATION_TIME (Y Time) ; set to large number for more brightness
aptSet(device, 0x001A, 0x0200); // RESET_AND_MISC_CONTROL (Parallel On) ;-Data on
if(device == I2C_CAM1)
i2cWriteRegister(0x4A, 0x31, 0x01);
}
void deactivate(u8 device) {
aptClr(device, 0x001A, 0x0200); // RESET_AND_MISC_CONTROL (Parallel Off) ;-Data off
aptSet(device, 0x0018, 0x0001); // STANDBY_CONTROL (set bit0=1=Standby) ;\.
aptWaitSet(device, 0x0018, 0x4000); // STANDBY_CONTROL (wait for StandbyDone) ; Standby
aptWaitClr(device, 0x301A, 0x0004); // UNDOC_CORE_301A (wait for StandbyDone) ;/
if(device == I2C_CAM1)
i2cWriteRegister(0x4A, 0x31, 0x00);
}

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/*---------------------------------------------------------------------------------
I2C control for the ARM7
Copyright (C) 2011
Dave Murphy (WinterMute)
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any
damages arising from the use of this software.
Permission is granted to anyone to use this software for any
purpose, including commercial applications, and to alter it and
redistribute it freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you
must not claim that you wrote the original software. If you use
this software in a product, an acknowledgment in the product
documentation would be appreciated but is not required.
2. Altered source versions must be plainly marked as such, and
must not be misrepresented as being the original software.
3. This notice may not be removed or altered from any source
distribution.
---------------------------------------------------------------------------------*/
/*********************************************************
* Based on libnds's i2c.twl.c, but modifed to work with *
* u16 addresses and data for the Aptina cameras. *
* -Pk11, 2020 *
********************************************************/
#include "aptina_i2c.h"
#include <nds/bios.h>
void i2cDelay();
void i2cStop(u8 arg0);
u8 i2cGetResult();
void i2cSetDelay(u8 device);
u8 aptGetData(u8 flags) {
REG_I2CCNT = 0xD0 | flags;
i2cWaitBusy();
return REG_I2CDATA;
}
u8 aptSetData(u8 data, u8 flags) {
REG_I2CDATA = data;
REG_I2CCNT = 0xC0 | flags;
return i2cGetResult();
}
u8 aptSelectDevice(u8 device, u8 flags) {
i2cWaitBusy();
REG_I2CDATA = device;
REG_I2CCNT = 0xC0 | flags;
return i2cGetResult();
}
u8 aptSelectRegister(u8 reg, u8 flags) {
i2cDelay();
REG_I2CDATA = reg;
REG_I2CCNT = 0xC0 | flags;
return i2cGetResult();
}
u8 aptWriteRegister(u8 device, u16 reg, u16 data) {
i2cSetDelay(device);
int i;
for(i = 0; i < 8; i++) {
if(aptSelectDevice(device, I2C_START) && aptSelectRegister(reg >> 8, I2C_NONE) &&
aptSelectRegister(reg & 0xFF, I2C_NONE)) {
i2cDelay();
if(aptSetData(data >> 8, I2C_NONE) && aptSetData(data & 0xFF, I2C_STOP))
return 1;
}
REG_I2CCNT = 0xC5;
}
return 0;
}
u16 aptReadRegister(u8 device, u16 reg) {
i2cSetDelay(device);
int i;
for(i = 0; i < 8; i++) {
if(aptSelectDevice(device, I2C_START) && aptSelectRegister(reg >> 8, I2C_NONE) &&
aptSelectRegister(reg & 0xFF, I2C_STOP)) {
i2cDelay();
if(aptSelectDevice(device | 1, I2C_START)) {
return (aptGetData(I2C_READ) << 8) | aptGetData(I2C_STOP | I2C_READ);
}
}
REG_I2CCNT = 0xC5;
}
return 0xffff;
}

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#include "i2c_handler.h"
#include "aptina.h"
#include "aptina_i2c.h"
#include <nds.h>
void checkFifo() {
if(fifoCheckValue32(FIFO_USER_01)) {
switch(fifoGetValue32(FIFO_USER_01)) {
case 0:
init(I2C_CAM0);
init(I2C_CAM1);
fifoSendValue32(FIFO_USER_02, aptReadRegister(I2C_CAM0, 0));
break;
case 1:
activate(I2C_CAM0);
fifoSendValue32(FIFO_USER_02, 1);
break;
case 2:
deactivate(I2C_CAM0);
fifoSendValue32(FIFO_USER_02, 2);
break;
case 3:
activate(I2C_CAM1);
fifoSendValue32(FIFO_USER_02, 3);
break;
case 4:
deactivate(I2C_CAM1);
fifoSendValue32(FIFO_USER_02, 4);
break;
default:
break;
}
}
}

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/*---------------------------------------------------------------------------------
default ARM7 core
Copyright (C) 2005 - 2010
Michael Noland (joat)
Jason Rogers (dovoto)
Dave Murphy (WinterMute)
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any
damages arising from the use of this software.
Permission is granted to anyone to use this software for any
purpose, including commercial applications, and to alter it and
redistribute it freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you
must not claim that you wrote the original software. If you use
this software in a product, an acknowledgment in the product
documentation would be appreciated but is not required.
2. Altered source versions must be plainly marked as such, and
must not be misrepresented as being the original software.
3. This notice may not be removed or altered from any source
distribution.
---------------------------------------------------------------------------------*/
/*******************************************
* Modified to have fifo checking for I2C. *
* -Pk11, 2020 *
******************************************/
#include "i2c_handler.h"
#include <dswifi7.h>
#include <maxmod7.h>
#include <nds.h>
void VblankHandler(void) { Wifi_Update(); }
void VcountHandler() { inputGetAndSend(); }
volatile bool exitflag = false;
void powerButtonCB() { exitflag = true; }
int main() {
// clear sound registers
dmaFillWords(0, (void *)0x04000400, 0x100);
REG_SOUNDCNT |= SOUND_ENABLE;
writePowerManagement(PM_CONTROL_REG, (readPowerManagement(PM_CONTROL_REG) & ~PM_SOUND_MUTE) | PM_SOUND_AMP);
powerOn(POWER_SOUND);
readUserSettings();
ledBlink(0);
irqInit();
// Start the RTC tracking IRQ
initClockIRQ();
fifoInit();
touchInit();
mmInstall(FIFO_MAXMOD);
SetYtrigger(80);
installWifiFIFO();
installSoundFIFO();
installSystemFIFO();
irqSet(IRQ_VCOUNT, VcountHandler);
irqSet(IRQ_VBLANK, VblankHandler);
irqEnable(IRQ_VBLANK | IRQ_VCOUNT | IRQ_NETWORK);
setPowerButtonCB(powerButtonCB);
// Keep the ARM7 mostly idle
while(!exitflag) {
if(0 == (REG_KEYINPUT & (KEY_SELECT | KEY_START | KEY_L | KEY_R))) {
exitflag = true;
}
checkFifo();
swiWaitForVBlank();
}
return 0;
}

133
arm9/Makefile Normal file
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#---------------------------------------------------------------------------------
.SUFFIXES:
#---------------------------------------------------------------------------------
ifeq ($(strip $(DEVKITARM)),)
$(error "Please set DEVKITARM in your environment. export DEVKITARM=<path to>devkitARM")
endif
include $(DEVKITARM)/ds_rules
#---------------------------------------------------------------------------------
# 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 files
# all directories are relative to this makefile
#---------------------------------------------------------------------------------
BUILD := build
SOURCES := source
INCLUDES := include
DATA :=
#---------------------------------------------------------------------------------
# options for code generation
#---------------------------------------------------------------------------------
ARCH := -mthumb -mthumb-interwork
CFLAGS := -g -Wall -Wno-psabi -O2\
-march=armv5te -mtune=arm946e-s -fomit-frame-pointer\
-ffast-math \
$(ARCH)
CFLAGS += $(INCLUDE) -DARM9
CXXFLAGS := $(CFLAGS) -fno-rtti -fno-exceptions -std=gnu++20 -Wno-volatile
ASFLAGS := -g $(ARCH) -march=armv5te -mtune=arm946e-s
LDFLAGS = -specs=ds_arm9.specs -g $(ARCH) -Wl,-Map,$(notdir $*.map)
#---------------------------------------------------------------------------------
# any extra libraries we wish to link with the project
#---------------------------------------------------------------------------------
LIBS := -lnds9
#---------------------------------------------------------------------------------
# list of directories containing libraries, this must be the top level containing
# include and lib
#---------------------------------------------------------------------------------
LIBDIRS := $(LIBNDS)
#---------------------------------------------------------------------------------
# no real need to edit anything past this point unless you need to add additional
# rules for different file extensions
#---------------------------------------------------------------------------------
ifneq ($(BUILD),$(notdir $(CURDIR)))
#---------------------------------------------------------------------------------
export ARM9ELF := $(CURDIR)/$(TARGET).elf
export DEPSDIR := $(CURDIR)/$(BUILD)
export VPATH := $(foreach dir,$(SOURCES),$(CURDIR)/$(dir)) \
$(foreach dir,$(DATA),$(CURDIR)/$(dir))
CFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.c)))
CPPFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.cpp)))
SFILES := $(foreach dir,$(SOURCES),$(notdir $(wildcard $(dir)/*.s)))
BINFILES := $(foreach dir,$(DATA),$(notdir $(wildcard $(dir)/*.*)))
#---------------------------------------------------------------------------------
# use CXX for linking C++ projects, CC for standard C
#---------------------------------------------------------------------------------
ifeq ($(strip $(CPPFILES)),)
#---------------------------------------------------------------------------------
export LD := $(CC)
#---------------------------------------------------------------------------------
else
#---------------------------------------------------------------------------------
export LD := $(CXX)
#---------------------------------------------------------------------------------
endif
#---------------------------------------------------------------------------------
export OFILES := $(addsuffix .o,$(BINFILES)) \
$(CPPFILES:.cpp=.o) $(CFILES:.c=.o) $(SFILES:.s=.o)
export INCLUDE := $(foreach dir,$(INCLUDES),-I$(CURDIR)/$(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) *.elf *.nds* *.bin
#---------------------------------------------------------------------------------
else
#---------------------------------------------------------------------------------
# main targets
#---------------------------------------------------------------------------------
$(ARM9ELF) : $(OFILES)
@echo linking $(notdir $@)
@$(LD) $(LDFLAGS) $(OFILES) $(LIBPATHS) $(LIBS) -o $@
#---------------------------------------------------------------------------------
# you need a rule like this for each extension you use as binary data
#---------------------------------------------------------------------------------
%.bin.o : %.bin
#---------------------------------------------------------------------------------
@echo $(notdir $<)
@$(bin2o)
-include $(DEPSDIR)/*.d
#---------------------------------------------------------------------------------------
endif
#---------------------------------------------------------------------------------------
cppcheck:
@rm -f ../cppcheck.log
@cppcheck . --enable=all $(INCLUDE) -UJSON_CATCH_USER -U_Check_return_ -U_MSC_VER -U_Ret_notnull_ -U__INTEL_COMPILER -U__PGI -U__SUNPRO_CC -UJSON_INTERNAL_CATCH_USER -UJSON_THROW_USER -UJSON_TRY_USER -U__IBMCPP__ -U__SUNPRO_CC -D__GNUC__=9 -D__GNUC_MINOR__=1 -DNULL=nullptr --force 2> ../cppcheck.log
@echo build/cppcheck.log file created...
format:
clang-format -i -style=file $(foreach dir,$(SOURCES),$(wildcard $(dir)/*.c) $(wildcard $(dir)/*.cpp) $(wildcard $(dir)/*.hpp) $(wildcard $(dir)/*.h)) $(foreach dir,$(INCLUDES),$(wildcard $(dir)/*.h) $(wildcard $(dir)/*.hpp))

87
arm9/source/main.cpp Normal file
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#include <nds.h>
#include <stdio.h>
int main(int argc, char **argv) {
consoleDemoInit();
vramSetBankA(VRAM_A_MAIN_BG);
videoSetMode(MODE_5_2D);
int bg3Main = bgInit(3, BgType_Bmp16, BgSize_B16_256x256, 1, 0);
printf("Initializing...\n");
// https://problemkaputt.de/gbatek.htm#dsicameras
*(u16 *)0x4004004 |= 0x0004; // SCFG_CLK, CamInterfaceClock = ON
*(u16 *)0x4004200 = 0x0000; // CAM_MCNT, Camera Module Control
swiDelay(0x1E);
*(u16 *)0x4004004 |= 0x0100; // SCFG_CLK, CamExternal Clock = ON
swiDelay(0x1E);
*(u16 *)0x4004200 = 0x0022; // CAM_MCNT, Camera Module Control
swiDelay(0x2008);
*(u16 *)0x4004004 &= ~0x0100; // SCFG_CLK, CamExternal Clock = OFF
*(u16 *)0x4004202 &= ~0x8000; // CAM_CNT, allow changing params
*(u16 *)0x4004202 |= 0x0020; // CAM_CNT, flush data fifo
*(u16 *)0x4004202 = (*(u16 *)0x4004202 & ~0x0300) | 0x0200;
*(u16 *)0x4004202 |= 0x0400;
*(u16 *)0x4004202 |= 0x0800; // CAM_CNT, irq enable
*(u16 *)0x4004004 |= 0x0100; // SCFG_CLK, CamExternal Clock = ON
swiDelay(0x14);
fifoSendValue32(FIFO_USER_01, 0); // issue "aptina_code_list_init" via I2C bus on ARM7 side
while(!fifoCheckValue32(FIFO_USER_02))
swiWaitForVBlank();
printf("ID: 0x%lx\n", fifoGetValue32(FIFO_USER_02));
*(u16 *)0x4004004 &= ~0x0100; // SCFG_CLK, CamExternal Clock = OFF
*(u16 *)0x4004004 |= 0x0100; // SCFG_CLK, CamExternal Clock = ON
swiDelay(0x14);
fifoSendValue32(FIFO_USER_01, 3); // issue "aptina_code_list_activate" via I2C bus on ARM7 side
while(!fifoCheckValue32(FIFO_USER_02))
swiWaitForVBlank();
printf("Active: 0x%lx\n", fifoGetValue32(FIFO_USER_02));
*(u16 *)0x4004202 |= 0x2000; // CAM_CNT, enable YUV-to-RGB555
*(u16 *)0x4004202 = (*(u16 *)0x4004202 & ~0x000F) | 0x0003;
*(u16 *)0x4004202 |= 0x0020; // CAM_CNT, flush data fifo
*(u16 *)0x4004202 |= 0x8000; // CAM_CNT, start transfer
*(u32 *)0x4004120 = 0x04004204; // NDMA1SAD, source CAM_DTA
*(u32 *)0x4004124 = (u32)bgGetGfxPtr(bg3Main); // NDMA1DAD, dest RAM/VRAM
*(u32 *)0x4004128 = 0x00006000; // NDMA1TCNT, len for 256x192 total
*(u32 *)0x400412C = 0x00000200; // NDMA1WCNT, len for 256x4 blocks
*(u32 *)0x4004130 = 0x00000002; // NDMA1BCNT, timing interval or so
*(u32 *)0x4004138 = 0x8B044000; // NDMA1CNT, start camera DMA
bool inner = false;
while(1) {
// dmaFillHalfWords(0xfc1f, bgGetGfxPtr(bg3Main), 256 * 192 * 2);
swiWaitForVBlank();
scanKeys();
if(keysDown() & KEY_A) {
*(u16 *)0x4004202 &= ~0x8000;
if(inner) {
fifoSendValue32(FIFO_USER_01, 2);
while(!fifoCheckValue32(FIFO_USER_02))
swiWaitForVBlank();
printf("Disable: 0x%lx\n", fifoGetValue32(FIFO_USER_02));
fifoSendValue32(FIFO_USER_01, 3);
while(!fifoCheckValue32(FIFO_USER_02))
swiWaitForVBlank();
printf("Enable: 0x%lx\n", fifoGetValue32(FIFO_USER_02));
} else {
fifoSendValue32(FIFO_USER_01, 4);
while(!fifoCheckValue32(FIFO_USER_02))
swiWaitForVBlank();
printf("Disable: 0x%lx\n", fifoGetValue32(FIFO_USER_02));
fifoSendValue32(FIFO_USER_01, 1);
while(!fifoCheckValue32(FIFO_USER_02))
swiWaitForVBlank();
printf("Enable: 0x%lx\n", fifoGetValue32(FIFO_USER_02));
}
inner = !inner;
*(u16 *)0x4004202 |= ~0x8000;
} else if(keysDown() & KEY_START) {
return 0;
}
}
}