Added code for using the microphone and an example app for it.

examples/mic/Makefile

@@ -0,0 +1,139 @@
+#---------------------------------------------------------------------------------
+.SUFFIXES:
+#---------------------------------------------------------------------------------
+
+ifeq ($(strip $(DEVKITARM)),)
+$(error "Please set DEVKITARM in your environment. export DEVKITARM=<path to>devkitARM")
+endif
+
+ifeq ($(strip $(CTRULIB)),)
+# THIS IS TEMPORARY - in the future it should be at $(DEVKITPRO)/libctru
+$(error "Please set CTRULIB in your environment. export CTRULIB=<path to>libctru")
+endif
+
+TOPDIR ?= $(CURDIR)
+include $(DEVKITARM)/3ds_rules
+
+#---------------------------------------------------------------------------------
+# 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
+# DATA is a list of directories containing data files
+# INCLUDES is a list of directories containing header files
+# SPECS is the directory containing the important build and link files
+#---------------------------------------------------------------------------------
+export TARGET		:=	$(shell basename $(CURDIR))
+BUILD		:=	build
+SOURCES		:=	source
+DATA		:=	data
+INCLUDES	:=	include
+
+
+#---------------------------------------------------------------------------------
+# options for code generation
+#---------------------------------------------------------------------------------
+ARCH	:=	-march=armv6k -mtune=mpcore
+
+CFLAGS	:=	-g -Wall -O2 -mword-relocations -save-temps \
+			-fomit-frame-pointer -ffast-math \
+			$(ARCH)
+
+CFLAGS	+=	$(INCLUDE) -DARM11 -D_3DS
+
+CXXFLAGS	:= $(CFLAGS) -fno-rtti -fno-exceptions -std=gnu++11
+
+ASFLAGS	:=	-g $(ARCH)
+LDFLAGS	=	-specs=3dsx.specs -g $(ARCH) \
+			-Wl,-Map,$(TARGET).map
+
+LIBS	:= -lctru -lm
+
+#---------------------------------------------------------------------------------
+# list of directories containing libraries, this must be the top level containing
+# include and lib
+#---------------------------------------------------------------------------------
+LIBDIRS	:= $(CTRULIB)
+ 
+  
+#---------------------------------------------------------------------------------
+# no real need to edit anything past this point unless you need to add additional
+# rules for different file extensions
+#---------------------------------------------------------------------------------
+ifneq ($(BUILD),$(notdir $(CURDIR)))
+#---------------------------------------------------------------------------------
+ 
+export OUTPUT	:=	$(CURDIR)/$(TARGET)
+export TOPDIR	:=	$(CURDIR)
+
+export VPATH	:=	$(foreach dir,$(SOURCES),$(CURDIR)/$(dir)) \
+			$(foreach dir,$(DATA),$(CURDIR)/$(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)))
+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 all
+ 
+#---------------------------------------------------------------------------------
+all: $(BUILD)
+
+$(BUILD):
+	@[ -d $@ ] || mkdir -p $@
+	@make --no-print-directory -C $(BUILD) -f $(CURDIR)/Makefile
+ 
+#---------------------------------------------------------------------------------
+clean:
+	@echo clean ...
+	@rm -fr $(BUILD) $(TARGET).3dsx $(TARGET).elf
+ 
+ 
+#---------------------------------------------------------------------------------
+else
+ 
+DEPENDS	:=	$(OFILES:.o=.d)
+ 
+#---------------------------------------------------------------------------------
+# main targets
+#---------------------------------------------------------------------------------
+$(OUTPUT).3dsx	:	$(OUTPUT).elf
+$(OUTPUT).elf	:	$(OFILES)
+
+#---------------------------------------------------------------------------------
+# you need a rule like this for each extension you use as binary data 
+#---------------------------------------------------------------------------------
+%.bin.o	:	%.bin
+#---------------------------------------------------------------------------------
+	@echo $(notdir $<)
+	$(bin2o)
+
+-include $(DEPENDS)
+ 
+#---------------------------------------------------------------------------------------
+endif
+#---------------------------------------------------------------------------------------

examples/mic/README.md

@@ -0,0 +1,5 @@
+arm11u
+=======
+
+Example for using the microphone with ctrulib. Hold down the A button to record, the app will then play the recorded audio once the A button is released. Roughly 32 seconds of audio can be recorded with the default audiobuf size in this app.
+

examples/mic/source/main.c

@@ -0,0 +1,95 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <malloc.h>
+#include <3ds.h>
+
+int main()
+{
+	u8 *framebuf;
+	u32 *sharedmem = NULL, sharedmem_size = 0x30000;
+	u8 *audiobuf;
+	u32 audiobuf_size = 0x100000, audiobuf_pos = 0;
+	u8 control=0x40;
+
+	srvInit();	
+	aptInit();
+	gfxInit();
+	hidInit(NULL);
+	aptSetupEventHandler();
+	
+	CSND_initialize(NULL);
+
+	sharedmem = (u32*)memalign(0x1000, sharedmem_size);
+	audiobuf = linearAlloc(audiobuf_size);
+
+	MIC_Initialize(sharedmem, sharedmem_size, control, 0, 3, 1, 1);//See mic.h.
+
+	APP_STATUS status;
+	while((status=aptGetStatus())!=APP_EXITING)
+	{
+		if(status==APP_RUNNING)
+		{
+			framebuf = gfxGetFramebuffer(GFX_TOP, GFX_LEFT, NULL, NULL);
+			hidScanInput();
+
+			if(hidKeysDown() & KEY_A)
+			{
+				audiobuf_pos = 0;
+
+				CSND_setchannel_playbackstate(0x8, 0);//Stop audio playback.
+				CSND_sharedmemtype0_cmdupdatestate(0);
+
+				MIC_SetRecording(1);
+
+				memset(framebuf, 0x20, 0x46500);
+			}
+
+			if((hidKeysHeld() & KEY_A) && audiobuf_pos < audiobuf_size)
+			{
+				audiobuf_pos+= MIC_ReadAudioData(&audiobuf[audiobuf_pos], audiobuf_size-audiobuf_pos, 1);
+				if(audiobuf_pos > audiobuf_size)audiobuf_pos = audiobuf_size;
+
+				memset(framebuf, 0x60, 0x46500);
+			}
+
+			if(hidKeysUp() & KEY_A)
+			{
+				MIC_SetRecording(0);
+				GSPGPU_FlushDataCache(NULL, audiobuf, audiobuf_pos);
+				CSND_playsound(0x8, CSND_LOOP_DISABLE, CSND_ENCODING_PCM16, 16000, (u32*)audiobuf, NULL, audiobuf_pos, 2, 0);
+
+				memset(framebuf, 0xe0, 0x46500);
+
+				gfxFlushBuffers();
+				gfxSwapBuffers();
+
+				framebuf = gfxGetFramebuffer(GFX_TOP, GFX_LEFT, NULL, NULL);
+				memset(framebuf, 0xe0, 0x46500);
+			}
+
+			gfxFlushBuffers();
+			gfxSwapBuffers();
+		}
+		else if(status == APP_SUSPENDING)
+		{
+			aptReturnToMenu();
+		}
+		else if(status == APP_SLEEPMODE)
+		{
+			aptWaitStatusEvent();
+		}
+		gspWaitForVBlank();
+	}
+
+	MIC_Shutdown();
+
+	CSND_shutdown();
+
+	hidExit();
+	gfxExit();
+	aptExit();
+	srvExit();
+	return 0;
+}
+

libctru/include/3ds.h

@@ -23,6 +23,7 @@ extern "C" {
 #include <3ds/services/ir.h>
 #include <3ds/services/ptm.h>
 #include <3ds/services/soc.h>
+#include <3ds/services/mic.h>
 
 #include <3ds/gpu/gx.h>
 #include <3ds/gpu/gpu.h>

libctru/include/3ds/services/mic.h

@@ -0,0 +1,20 @@
+#pragma once
+
+//See also: http://3dbrew.org/wiki/MIC_Services
+
+Result MIC_Initialize(u32 *sharedmem, u32 sharedmem_size, u8 control, u8 recording, u8 unk0, u8 unk1, u8 unk2);//sharedmem_size = audiodata size + 4, aligned to 0x1000-bytes. The sharedmem ptr must be 0x1000-bytes aligned. The offical 3ds-sound app uses the following values for unk0-unk2: 3, 1, and 1.
+Result MIC_Shutdown();
+u32 MIC_GetSharedMemOffsetValue();
+u32 MIC_ReadAudioData(u8 *outbuf, u32 readsize, u32 waitforevent);//Reads MIC audio data. When waitforevent is non-zero, this clears the event, then waits for MIC-module to signal it again when audio data is written to shared-mem. The return value is the actual byte-size of the read data.
+
+Result MIC_MapSharedMem(Handle handle, u32 size);
+Result MIC_UnmapSharedMem();
+Result MIC_cmd3_Initialize(u8 unk0, u8 unk1, u32 sharedmem_baseoffset, u32 sharedmem_endoffset, u8 unk2);
+Result MIC_cmd5();
+Result MIC_GetCNTBit15(u8 *out);
+Result MIC_GetEventHandle(Handle *handle);
+Result MIC_SetControl(u8 value);//See here: http://3dbrew.org/wiki/MIC_Services
+Result MIC_GetControl(u8 *value);
+Result MIC_SetRecording(u8 value);
+Result MIC_IsRecoding(u8 *value);
+

libctru/source/services/mic.c

@@ -0,0 +1,270 @@
+#include <stdlib.h>
+#include <string.h>
+#include <3ds.h>
+
+//See also: http://3dbrew.org/wiki/MIC_Services
+
+Handle MIC_handle;
+
+static u8 *MIC_sharedmem;
+static u32 MIC_sharedmem_size;
+static u32 *MIC_sharedmem_offsetfield, MIC_sharedmem_offsetfield_location;
+static Handle MIC_sharedmem_handle;
+static Handle MIC_event;
+
+static u32 MIC_prev_endpos, MIC_cur_endpos;
+
+Result MIC_Initialize(u32 *sharedmem, u32 sharedmem_size, u8 control, u8 recording, u8 unk0, u8 unk1, u8 unk2)
+{
+	Result ret=0;
+
+	MIC_sharedmem = (u8*)sharedmem;
+	MIC_sharedmem_size = sharedmem_size;
+	MIC_sharedmem_offsetfield_location = MIC_sharedmem_size - 4;
+	MIC_sharedmem_offsetfield = (u32*)&MIC_sharedmem[MIC_sharedmem_offsetfield_location];
+	MIC_event = 0;
+	MIC_prev_endpos = 0;
+	MIC_cur_endpos = 0;
+
+	ret = srvGetServiceHandle(&MIC_handle, "mic:u");
+	if(ret!=0)return ret;
+
+	ret = svcCreateMemoryBlock(&MIC_sharedmem_handle, (u32)MIC_sharedmem, MIC_sharedmem_size, 3, 3);
+	if(ret!=0)return ret;
+
+	ret = MIC_SetControl(control);
+	if(ret!=0)return ret;
+
+	ret = MIC_MapSharedMem(MIC_sharedmem_handle, sharedmem_size);
+	if(ret!=0)return ret;
+
+	ret = MIC_SetRecording(recording);
+	if(ret!=0)return ret;
+
+	ret = MIC_cmd3_Initialize(unk0, unk1, 0, MIC_sharedmem_size-4, unk2);
+	if(ret!=0)return ret;
+
+	ret = MIC_GetEventHandle(&MIC_event);
+	if(ret!=0)return ret;
+	svcClearEvent(MIC_event);
+
+	return 0;
+}
+
+Result MIC_Shutdown()
+{
+	Result ret=0;
+
+	MIC_cmd5();
+	MIC_SetRecording(0);
+
+	ret = MIC_UnmapSharedMem();
+	if(ret!=0)return ret;
+
+	MIC_cmd5();
+
+	ret = svcUnmapMemoryBlock(MIC_sharedmem_handle, (u32)MIC_sharedmem);
+	if(ret!=0)return ret;
+
+	ret = svcCloseHandle(MIC_sharedmem_handle);
+	if(ret!=0)return ret;
+
+	ret = svcCloseHandle(MIC_event);
+	if(ret!=0)return ret;
+
+	ret = svcCloseHandle(MIC_handle);
+	if(ret!=0)return ret;
+
+	MIC_sharedmem_offsetfield = NULL;
+	MIC_sharedmem = NULL;
+	MIC_sharedmem_size = 0;
+	MIC_handle = 0;
+	MIC_event = 0;
+
+	return 0;
+}
+
+u32 MIC_GetSharedMemOffsetValue()
+{
+	u32 pos = 0;
+
+	if(MIC_sharedmem_offsetfield==NULL)return pos;
+	pos = *MIC_sharedmem_offsetfield;
+	if(pos > MIC_sharedmem_offsetfield_location)pos = MIC_sharedmem_offsetfield_location;
+
+	return pos;
+}
+
+u32 MIC_ReadAudioData(u8 *outbuf, u32 readsize, u32 waitforevent)
+{
+	u32 pos = 0, bufpos = 0;
+	
+	if(waitforevent)
+	{
+		svcClearEvent(MIC_event);
+		svcWaitSynchronization(MIC_event, U64_MAX);
+	}
+
+	MIC_prev_endpos = MIC_cur_endpos;
+	MIC_cur_endpos = MIC_GetSharedMemOffsetValue();
+	pos = MIC_prev_endpos;
+
+	while(pos != MIC_cur_endpos)
+	{
+		if(pos >= MIC_sharedmem_offsetfield_location)pos = 0;
+		if(bufpos>=readsize)break;
+
+		outbuf[bufpos] = MIC_sharedmem[pos];
+		bufpos++;
+		pos++;
+	}
+
+	return bufpos;
+}
+
+Result MIC_MapSharedMem(Handle handle, u32 size)
+{
+	Result ret=0;
+	u32 *cmdbuf = getThreadCommandBuffer();
+
+	cmdbuf[0] = 0x00010042;
+	cmdbuf[1] = size;
+	cmdbuf[2] = 0;
+	cmdbuf[3] = handle;
+
+	if((ret = svcSendSyncRequest(MIC_handle))!=0)return ret;
+
+	return (Result)cmdbuf[1];
+}
+
+Result MIC_UnmapSharedMem()
+{
+	Result ret=0;
+	u32 *cmdbuf = getThreadCommandBuffer();
+
+	cmdbuf[0] = 0x00020000;
+
+	if((ret = svcSendSyncRequest(MIC_handle))!=0)return ret;
+
+	return (Result)cmdbuf[1];
+}
+
+Result MIC_cmd3_Initialize(u8 unk0, u8 unk1, u32 sharedmem_baseoffset, u32 sharedmem_endoffset, u8 unk2)
+{
+	Result ret=0;
+	u32 *cmdbuf = getThreadCommandBuffer();
+
+	cmdbuf[0] = 0x00030140;
+	cmdbuf[1] = unk0;
+	cmdbuf[2] = unk1;
+	cmdbuf[3] = sharedmem_baseoffset;
+	cmdbuf[4] = sharedmem_endoffset;
+	cmdbuf[5] = unk2;
+
+	if((ret = svcSendSyncRequest(MIC_handle))!=0)return ret;
+
+	return (Result)cmdbuf[1];
+}
+
+Result MIC_cmd5()
+{
+	Result ret=0;
+	u32 *cmdbuf = getThreadCommandBuffer();
+
+	cmdbuf[0] = 0x00050000;
+
+	if((ret = svcSendSyncRequest(MIC_handle))!=0)return ret;
+
+	return (Result)cmdbuf[1];
+}
+
+Result MIC_GetCNTBit15(u8 *out)
+{
+	Result ret=0;
+	u32 *cmdbuf = getThreadCommandBuffer();
+
+	cmdbuf[0] = 0x00060000;
+
+	if((ret = svcSendSyncRequest(MIC_handle))!=0)return ret;
+
+	if(out)*out = cmdbuf[2];
+
+	return (Result)cmdbuf[1];
+}
+
+Result MIC_GetEventHandle(Handle *handle)
+{
+	Result ret=0;
+	u32 *cmdbuf = getThreadCommandBuffer();
+
+	if(MIC_event)
+	{
+		*handle = MIC_event;
+		return 0;
+	}
+
+	cmdbuf[0] = 0x00070000;
+
+	if((ret = svcSendSyncRequest(MIC_handle))!=0)return ret;
+
+	if(handle)*handle = cmdbuf[2];
+
+	return (Result)cmdbuf[1];
+}
+
+Result MIC_SetControl(u8 value)
+{
+	Result ret=0;
+	u32 *cmdbuf = getThreadCommandBuffer();
+
+	cmdbuf[0] = 0x00080040;
+	cmdbuf[1] = value;
+
+	if((ret = svcSendSyncRequest(MIC_handle))!=0)return ret;
+
+	return (Result)cmdbuf[1];
+}
+
+Result MIC_GetControl(u8 *value)
+{
+	Result ret=0;
+	u32 *cmdbuf = getThreadCommandBuffer();
+
+	cmdbuf[0] = 0x00090000;
+
+	if((ret = svcSendSyncRequest(MIC_handle))!=0)return ret;
+
+	if(value)*value = cmdbuf[2];
+
+	return (Result)cmdbuf[1];
+}
+
+Result MIC_SetRecording(u8 value)
+{
+	Result ret=0;
+	u32 *cmdbuf = getThreadCommandBuffer();
+
+	cmdbuf[0] = 0x000A0040;
+	cmdbuf[1] = value;
+
+	if((ret = svcSendSyncRequest(MIC_handle))!=0)return ret;
+
+	if(value==1)MIC_cur_endpos = MIC_GetSharedMemOffsetValue();
+
+	return (Result)cmdbuf[1];
+}
+
+Result MIC_IsRecoding(u8 *value)
+{
+	Result ret=0;
+	u32 *cmdbuf = getThreadCommandBuffer();
+
+	cmdbuf[0] = 0x000B0000;
+
+	if((ret = svcSendSyncRequest(MIC_handle))!=0)return ret;
+
+	if(value)*value = cmdbuf[2];
+
+	return (Result)cmdbuf[1];
+}
+