commit 58fe6ef3b1f20a4916111529b627e2f638805de5
Author: Eggert Jung <eggert.s.jung@wischhof13.de>
Date:   Tue Jun 4 18:45:10 2024 +0200

    initial

diff --git a/Firmware/.gitignore b/Firmware/.gitignore
new file mode 100644
index 0000000..7890015
--- /dev/null
+++ b/Firmware/.gitignore
@@ -0,0 +1,8 @@
+depends
+.pio
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+
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diff --git a/Firmware/Builds/main.elf b/Firmware/Builds/main.elf
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diff --git a/Firmware/Builds/src/main.o b/Firmware/Builds/src/main.o
new file mode 100644
index 0000000..9ef9154
Binary files /dev/null and b/Firmware/Builds/src/main.o differ
diff --git a/Firmware/Builds/src/music.o b/Firmware/Builds/src/music.o
new file mode 100644
index 0000000..1f64cee
Binary files /dev/null and b/Firmware/Builds/src/music.o differ
diff --git a/Firmware/Makefile b/Firmware/Makefile
new file mode 100644
index 0000000..084f5a2
--- /dev/null
+++ b/Firmware/Makefile
@@ -0,0 +1,59 @@
+TARGET  = main
+SRCS   := $(shell find ../../dmm-libs-master/src/ -name '*.c') $(shell find src/ -name '*.c')
+FILES   = $(SRCS:%.c=%) #main uart avrIOhelper/io-helper #uart#hier alle c-Datein reinschreiben, trennung durch "  " und ohne .c-Endung
+MCU     = atmega1284
+PROGC	= m1284
+CC      = avr-gcc
+#TOOL    = stk500 -P /dev/ttyUSB0
+TOOL    = atmelice
+#TOOL    = avrispmkii
+#TOOL    = usbasp-clone
+
+BUILDDIR = Builds
+
+DEFINES = -DF_CPU=16000000UL -I include/ -I ../../dmm-libs-master/include/
+
+CFLAGS  =-mmcu=$(MCU) -O2 -Wall -Wpedantic $(DEFINES) -std=c99 -ffunction-sections -fdata-sections
+LDFLAGS =-mmcu=$(MCU) -Wl,--gc-sections
+
+LDFILES = $(foreach FILE,$(FILES),$(BUILDDIR)/$(FILE).o)
+
+all: clean $(BUILDDIR)/$(TARGET).elf
+
+$(BUILDDIR)/%.o: %.c
+	mkdir -p $(dir $@)
+	$(CC) $(CFLAGS) -c $< -o $(BUILDDIR)/$*.o
+
+$(BUILDDIR)/$(TARGET).elf: $(LDFILES)
+	mkdir -p $(dir $@)
+	$(CC) $(LDFLAGS) $(LDFILES) -o $(BUILDDIR)/$(TARGET).elf
+
+$(BUILDDIR)/$(TARGET).hex : $(BUILDDIR)/$(TARGET).elf
+	 avr-objcopy -j .data -j .text -O ihex $< $@
+
+fuse: 
+	avrdude -p $(PROGC) -c $(TOOL) -U lfuse:w:0xE8:m -U hfuse:w:0xD1:m
+
+load: $(BUILDDIR)/$(TARGET).hex
+	avrdude -p $(PROGC) -c $(TOOL) -U flash:w:$(BUILDDIR)/$(TARGET).hex -v -B 4MHz
+
+program: clean load
+
+reset:
+	avrdude -p $(PROGC) -c $(TOOL)
+	
+size: $(BUILDDIR)/$(TARGET).elf
+	avr-size -C --mcu=$(MCU) $(BUILDDIR)/$(TARGET).elf
+
+.PHONY=clean
+clean:
+	rm -rf $(BUILDDIR)
+
+
+#Fuse m1284p external Osz. Long startuptime
+#  avrdude -c usbasp-clone -p m1284p -U lfuse:w:0xff:m -U hfuse:w:0xd9:m -U efuse:w:0xff:m
+
+#Fuse m1284p internal Osz. Long startuptime
+#  avrdude -c usbasp-clone -p m1284p -U lfuse:w:0xe2:m -U hfuse:w:0xd9:m -U efuse:w:0xff:m
+
+
diff --git a/Firmware/README.md b/Firmware/README.md
new file mode 100644
index 0000000..b4274a6
--- /dev/null
+++ b/Firmware/README.md
@@ -0,0 +1,161 @@
+# DMM Demo
+
+Beispielprojekt zur Demonstration der wesentlichen Funktionen des DMM-Boards. 
+Wird auch zur Installation des Bootloaders und Test nach der Inbetriebnahme 
+eingesetzt.
+
+## Anleitung 
+
+### Build-System und Entwicklungsumgebung
+
+Als plattformübergreifendes Build-System Dient das 
+[PlatformIO](https://platformio.org/). Diese steht sowohl als 
+Kommandozeilen-Tool, als auch als [Erweiterung](https://marketplace.visualstudio.com/items?itemName=platformio.platformio-ide)
+zum [Visual Studio Code](https://code.visualstudio.com/). 
+(auch unter Linux und MacOS verfügbar!)
+
+Nutzt man das VSCode, so können nach der Installation der Erweiterung die unten 
+aufgeführten Befehle auch *ohne Installation der PIO im Betriebssystem* in den
+Terminals innerhalb der IDE genutzt werden. Für die Betriebssystemweite Installation 
+siehe Anleitung unter [PlatformIO Core (CLI)](https://docs.platformio.org/en/latest/core/installation.html).
+
+*Nur Linux:* zur Programmierung des Bootloaders mit JTAGICE muss dieser 
+für nicht-root Nutzer per udev-Regel freigegeben werden. Erstelle dazu Datei 
+`/etc/udev/rules.d/99-jtagice3.rules` mit:
+```
+SUBSYSTEMS=="usb", ATTRS{idVendor}=="03eb", ATTRS{idProduct}=="2140", MODE="0666"
+```
+
+### Auschecken und bauen
+Es sollte sichergestellt sein, dass [Git](https://git-scm.com/) installiert und
+der [eigene SSH-Schlüssel im GitLab-Profil hinterlegt](https://docs.gitlab.com/ee/ssh/) 
+ist. Für Git-Anfänger finden sich im Internet zahlreiche Anleitungen, zum Beispiel 
+[diese](https://www.freecodecamp.org/news/learn-the-basics-of-git-in-under-10-minutes-da548267cc91/). 
+
+*GUI:* VSCode unterstützt Git direkt und kann nach der Einrichtung als GUI 
+genutzt werden.
+
+Auschecken:
+```
+$ git clone git@git.rz.tu-bs.de:emg/lehre/dmm/dmm-demo.git
+$ cd dmm-demo 
+```
+
+Es sind dre PlatformIO-Environments definiert: 
+  * `release` wird standardmäßig
+genutzt und ist auf die Programmierung per Bootloader ausgelegt. 
+  * `debug` wird
+für das Debugging mittels avr-stub genutzt.  
+  * `jtag` wird zum Aufspielen des Bootloaders mittels externem 
+JTAGICE3 Programmer genutzt.
+
+> **In `debug` darf daher kein UART genutzt werden, da es zur Kommunikation mit 
+> GDB dient**. Entsprechende Programmteile müssen gegebenenfalls mit 
+>`#ifndef GDBSTUB` deaktiviert werden!
+
+Bauen von `release`:
+```
+$ pio run -e release
+```
+
+Bauen von `debug`:
+```
+$ pio run -e debug
+
+```
+Wenn man `-e <environment>` weglässt, wird immer `debug` gebaut, da dies die 
+Standartkonfiguration ist, die von dem Debugger von VSCode genutzt werden soll.
+
+Die für die DMM-Projekte vorgesehenen 
+[Bibliotheken](git@git.rz.tu-bs.de:emg/lehre/dmm/dmm-libs.git) sowie die 
+Toolchain werden durch `pio run` automatisch heruntergeladen und müssen nicht 
+extra installiert werden. Die Bibliotheken werden dabei im Ordner 
+`dmm-demo/depends` hinterlegt.
+
+### Programmierung & Nutzung
+
+*GUI*: die hier aufgeführten Befehle können auch aus dem PlatformIO-Toolbar des 
+VSCode per Mausklick ausgeführt werden. 
+#### Aufspielen des Bootloaders
+
+Auf einem neuen Board muss zunächst mittels JTAGICE3 ein Bootloader aufgespielt
+werden. Dazu wird es mit dem JTAG-Header verbunden (Polung beachten!). 
+```
+$ pio run -t bootloader -e jtag
+```
+
+> Sollte es beim Aufruf zum Fehler `TypeError: expected str, bytes or 
+> os.PathLike object, not NoneType ...  
+> join(platform.get_package_dir("tool-avrdude"), "avrdude.conf")`
+> kommen, kann dieser durch einmaliges Aufrufen von 
+> `$ pio run -t upload -e jtag` 
+> vor der Installation des Bootloaders behoben werden.
+
+#### Aufspielen des Programms 
+
+Das Board muss per USB verbunden und Bootloader gestarted werden.
+**Zum Start des Bootloaders den Joystick in Richtung unten halten, Reset-Taste 
+drücken und den Joystick loslassen. Die Aktivierung des Bootloaders erkennt man 
+an dreimaligem Blinken und anschließendem Dauerleuchten der LED4 auf dem Board**.
+```
+$ pio run -e release -t upload
+```
+Anschließend Reset-Taste drücken um das Programm zu starten.
+
+#### UART-Kommunikation
+
+Ein Teil des Demos beschäftigt sich mit Kommunikation über einen virtuellen
+SerialPort via USB. Der `COMx` (Windows) oder `/dev/ttyUSBx` (Linux) Port wird
+von PlattformIO automatisch erkannt. Dies geschieht anhand des `hwid` Parameters 
+unter `boards/emgdmm_v3.json`, der den VID/PID des FTDI-Chips des DMM-Boards 
+angibt. Ein Terminal kann somit einfach geöffnet werden:
+```
+$ pio device monitor
+```
+
+Beim Drücken des Joystick im entsprechenden Teil des Demos wird nun eine Meldung
+angezeigt.
+
+#### Unit-Test
+
+Die Demo enthält im Ordner `tests` einen Beispiel zur Ausführung von Unit-Tests 
+auf dem Mikrocontroller. Dazu muss wie oben beschrieben der Bootloader aktiviert 
+werden. 
+```
+$ pio test
+```
+Nach dem Befehl wird eine Firmware auf das Board heruntergeladen, die bei der
+Ausführung per UART (wie auch bei `pio device monitor`) die Ergebnisse der
+Tests im Terminal ausgibt.
+
+#### Debugging mit avr-stub
+
+Normallerweise ist zum Debuggen (also Setzen von Breakpoints und Auslesen der 
+Register) ein JTAG-Adapter notwendig. PlattformIO kann
+mittels einer [Bibliothek](https://github.com/jdolinay/avr_debug) die Funktion
+der Hardware-Debugger unter Inkaufnahme einiger Nachteile teilweise ersetzen.
+Die Kommunikation erfolgt dabei per UART, der nicht mehr im eigenen Programm 
+genutzt werden kann.
+Die Konfiguration `debug` bindet die nötige Bibliothek ein, und schaltet 
+Optimierung über das Setzen von `build_type` aus und definiert `GDBSTUB`. Am
+Anfang des programms muss `debug_init()` aus `avr8-stub.h` aufgerufen werden.
+
+Debugging wird in VScode mittels "Run & Debug" Tab gestartet. Vorher muss
+der Bootloader aktiv sein. 
+
+Zu beachten ist:
+  * Beakpoints funktionieren nur in Programmteilen, wo Interrupts aktiviert 
+    sind. **Das setzen eines Breakpoints innerhalb einer Interruptroutine führt
+    immer zum Aufhängen des Programms**.
+  * Breakpoints werden über das Neuschreiben vom Flash gesetzt. Dies hat einen 
+    Verschleiß zufolge, da der Flash nur für 10000 Schreibzyklen ausgelegt ist.
+    Das "Steppen" einzelner Befehle ist daher sparsam zu verwenden.
+  * Der Debugger nutzt den Watchdog-Interrupt, daher darf WDT nicht vom Programm 
+    genutzt werden. Außerdem können die gelegentlichen Interrupts die Timings 
+    beeinflussen.
+
+> **TODO:** aktuell muss der Port des Debuggers manuell in `platformio.ini` 
+> unter `debug_port` gesetzt werden! 
+> (z.B. `/dev/ttyUSBx` unter Linux oder `COMx` unter Windows).
+> Für automatisches Auflösen des Ports siehe 
+> [Issue 253](https://github.com/platformio/platform-atmelavr/issues/253).
\ No newline at end of file
diff --git a/Firmware/boards/emgdmm_v3.json b/Firmware/boards/emgdmm_v3.json
new file mode 100644
index 0000000..ab9fb0d
--- /dev/null
+++ b/Firmware/boards/emgdmm_v3.json
@@ -0,0 +1,40 @@
+{
+    "build": {
+        "f_cpu": "16000000L",
+        "hwids": [
+            [
+                "0x0403",
+                "0x6001"
+            ]
+        ],
+        "mcu": "atmega1284p"
+    },
+    "platforms": [
+        "atmelavr"
+    ],
+    "name": "EMG DMM Board",
+    "upload": {
+        "maximum_ram_size": 16384,
+        "maximum_size": 130048,
+        "protocol": "arduino",
+        "require_upload_port": true
+    },
+    "bootloader": {
+        "file": "boards/optiboot_atmega1284p_dmm.hex",
+        "lfuse": "0xFF",
+        "hfuse": "0x9C",
+        "efuse": "0xFC",
+        "lock_bits": "0xFF"
+    },
+    "debug": {
+        "simavr_target": "atmega1284p",
+        "avr-stub": {
+            "speed": 115200
+        }
+    },
+    "test": {
+        "speed": 115200
+    },
+    "url": "https://www.emg.tu-bs.de/lehre/vl/vl_dmm_d.html",
+    "vendor": "EMG, TU Braunschweig"
+}
diff --git a/Firmware/boards/optiboot_atmega1284p_dmm.hex b/Firmware/boards/optiboot_atmega1284p_dmm.hex
new file mode 100644
index 0000000..80ab0b3
--- /dev/null
+++ b/Firmware/boards/optiboot_atmega1284p_dmm.hex
@@ -0,0 +1,55 @@
+:020000021000EC
+:10FC000001C020C1112484B7882391F00E98169A60
+:10FC100090B1282F2A70223011F496FF09C081FF7D
+:10FC200002C097EF94BF282E80E0F7D00C9400001C
+:10FC300085E08093810082E08093C00088E180931A
+:10FC4000C10086E08093C20080E18093C40080E020
+:10FC5000E4D0239A86E020E33CEF91E030938500E6
+:10FC60002093840096BBB09BFECF1B9AA895409131
+:10FC7000C00047FD02C0815089F743E0B42EAA249A
+:10FC8000A39451E1752EBDD0813471F4BAD0C82F40
+:10FC9000CAD081E0C23821F088E0C13809F083E0A1
+:10FCA000A9D080E1A7D0EFCF823419F484E1C3D08A
+:10FCB000F8CF853411F485E0FACF853581F4A1D0F1
+:10FCC000082F9FD0182F87FF07C08BB781608BBF8D
+:10FCD000000F111FA8D0E5CF8BB78E7FF8CF8635E8
+:10FCE00081F48FD08D3459F48CD0CBB78AD0C170C9
+:10FCF000880F8C2B8BBF81E09ED080E0D1CF83E03A
+:10FD0000FBCF843609F046C07CD0E82EF12CFE2CC7
+:10FD1000EE2477D0E82A75D0682EE701C12CDD24C7
+:10FD2000D39446018FEFC81AD80A6BD0F4018083B0
+:10FD30002197B9F778D0F5E46F120DC0FE01F39565
+:10FD4000EC16FD0609F4ADCF6081CE01800F911F46
+:10FD500091D02196F3CFF801B7BEE89507B600FC25
+:10FD6000FDCFFE01E00FF11FDE01B3958D919C9157
+:10FD70000C01A7BEE89511242296EC16FD0689F722
+:10FD800085E0F80187BFE89507B600FCFDCF77BE98
+:10FD9000E89587CF8437F9F434D0C82FD0E0DC2F32
+:10FDA000CC272FD0C82B2DD0D82E3DD07801F5E40C
+:10FDB000DF120AC0C70156D01DD021978FEFE81A75
+:10FDC000F80A2097B9F76DCFF70187917F0112D01C
+:10FDD0002197D1F766CF853739F425D08EE10AD047
+:10FDE00087E908D085E05CCF813509F073CF88E0E2
+:10FDF00014D070CF9091C00095FFFCCF8093C600C7
+:10FE000008958091C00087FFFCCF8091C00084FDE1
+:10FE100001C0A8958091C6000895E0E6F0E098E161
+:10FE2000908380830895EDDF803219F088E0F5DF5C
+:10FE3000FFCF84E1DFCFCF93C82FE3DFC150E9F7D5
+:10FE4000CF91F1CFFC010A0167BFE895112407B6F5
+:10FE500000FCFDCF667029F0452B19F481E187BFC6
+:10FE6000E8950895F999FECF92BD81BDF89A99273A
+:10FE700080B50895262FF999FECF1FBA92BD81BD96
+:10FE800020BD0FB6F894FA9AF99A0FBE019608951C
+:10FE900056657273696F6E3D382E31004F5054496C
+:10FEA000424F4F545F435553544F4D5645523D308A
+:10FEB000004465766963653D61746D6567613132E3
+:10FEC00038347000465F4350553D31363030303065
+:10FED00030304C00424947424F4F543D310042754B
+:10FEE000696C743A41707220313820323032313AC4
+:10FEF00032323A30333A303000554152543D3000BE
+:10FF0000424155445F524154453D313135323030E4
+:10FF1000004C45443D4233004C45445F53544152EC
+:0CFF2000545F464C41534845533D3300AC
+:02FFFE000108F8
+:040000031000FC00ED
+:00000001FF
diff --git a/Firmware/include/README b/Firmware/include/README
new file mode 100644
index 0000000..194dcd4
--- /dev/null
+++ b/Firmware/include/README
@@ -0,0 +1,39 @@
+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the usual convention is to give header files names that end with `.h'.
+It is most portable to use only letters, digits, dashes, and underscores in
+header file names, and at most one dot.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html
diff --git a/Firmware/include/music.h b/Firmware/include/music.h
new file mode 100644
index 0000000..295596a
--- /dev/null
+++ b/Firmware/include/music.h
@@ -0,0 +1,43 @@
+#ifndef MUSIC_H_
+#define MUSIC_H_
+
+typedef struct  
+{
+	uint16_t tone;
+	uint16_t duration;
+} MUSIC_Note;
+
+#define MUSIC_END { 0, 0 }
+#define MUSIC_IS_END(_note_)  (!((_note_).tone) && !((_note_).duration))
+
+#define MUSIC_A4 440
+#define MUSIC_B4 494
+#define MUSIC_C4 262
+#define MUSIC_D4 293
+#define MUSIC_E4 330
+#define MUSIC_F4 349
+#define MUSIC_G4 392
+
+#define MUSIC_A5 880
+#define MUSIC_B5 988
+#define MUSIC_C5 523
+#define MUSIC_D5 587
+#define MUSIC_E5 659
+#define MUSIC_F5 698
+#define MUSIC_G5 784
+
+#define MUSIC_1 1000
+#define MUSIC_2 (MUSIC_1/2)
+#define MUSIC_4 (MUSIC_1/4)
+#define MUSIC_8 (MUSIC_1/8)
+#define MUSIC_16 (MUSIC_1/16)
+#define MUSIC_32 (MUSIC_1/32)
+
+	
+typedef const MUSIC_Note* MUSIC_Track;
+extern const MUSIC_Note MUSIC_Tetris[];
+
+void Music_PlayTrack (MUSIC_Track track);
+
+
+#endif /* MUSIC_H_ */
\ No newline at end of file
diff --git a/Firmware/lib/README b/Firmware/lib/README
new file mode 100644
index 0000000..6debab1
--- /dev/null
+++ b/Firmware/lib/README
@@ -0,0 +1,46 @@
+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into executable file.
+
+The source code of each library should be placed in a an own separate directory
+("lib/your_library_name/[here are source files]").
+
+For example, see a structure of the following two libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional, custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |
+|  |- README --> THIS FILE
+|
+|- platformio.ini
+|--src
+   |- main.c
+
+and a contents of `src/main.c`:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+PlatformIO Library Dependency Finder will find automatically dependent
+libraries scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html
diff --git a/Firmware/platformio.ini b/Firmware/platformio.ini
new file mode 100644
index 0000000..14d55b1
--- /dev/null
+++ b/Firmware/platformio.ini
@@ -0,0 +1,55 @@
+; PlatformIO Project Configuration File
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[platformio]
+default_envs = debug
+libdeps_dir = depends
+
+[env]
+platform = atmelavr @ ^3.3.0
+
+board = emgdmm_v3
+monitor_speed = 9600
+test_transport = custom
+test_speed = 115200
+
+lib_deps = 
+  git@git.rz.tu-bs.de:emg/lehre/dmm/dmm-libs.git
+
+[env:release] ; for flash via bootloader
+; keep defaults, see board definitions for programming support
+
+
+[env:debug] ; for debugging using avr-stub, see documentation
+build_type = debug
+build_flags = 
+    -D DEBUG 
+    -D GDBSTUB ; program should disable any own UART use if this is defined
+    -D AVR8_BREAKPOINT_MODE=2
+
+debug_tool = avr-stub
+;debug_port = /dev/ttyUSB0 ; Linux Port TODO: this should be infered automagically
+debug_port = COM6 ; Windows COM Port
+
+; add GDB stub implementation
+lib_deps =
+    ${env.lib_deps}   
+    jdolinay/avr-debugger @ ^1.3
+
+
+[env:jtag] ; for JTAG bootloader flashing and potentialy debugging once supported
+build_type = debug
+build_flags = 
+    -D DEBUG
+
+upload_protocol = jtag3
+upload_flags = -p, atmega1284, -F ; fix signature error with JTAGICE
+upload_port = usb
+
+; Atmel-ICE based AVR debug is not directly supported by PIO as of 04.2020. As not 
+; available at home, not an issue for DMM at the moment.
+; Potentially solveable by using avarice as a server. 
+; See: https://github.com/platformio/platform-atmelavr/issues/53
+
diff --git a/Firmware/src/main.c b/Firmware/src/main.c
new file mode 100644
index 0000000..a5cb933
--- /dev/null
+++ b/Firmware/src/main.c
@@ -0,0 +1,551 @@
+#include <avr/io.h>
+#include <avr/interrupt.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <util/delay.h>
+#include <avr/pgmspace.h>
+
+#ifdef GDBSTUB  
+	#include "avr8-stub.h"
+#else 
+	#include "uart.h"
+#endif
+
+#include "lcd.h"
+#include "twi.h"
+#include "dataflash.h"
+#include "music.h"
+
+#define wait_joy_button()      \
+	{                          \
+		LCD_GotoXY(20, 7);     \
+		LCD_PutChar(0x10);     \
+		LCD_Update();          \
+		while (((PINA)&0x08))  \
+			;                  \
+		while (!((PINA)&0x08)) \
+			;                  \
+		_delay_ms(20);         \
+		while (((PINA)&0x08))  \
+			;                  \
+	}
+
+/* clang-format off */ 
+const uint8_t PROGMEM emg_logo[640] =
+{
+	0x80, 0xe0, 0xf0, 0xf8, 0xf8, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 
+	0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 
+	0xfc, 0xfc, 0xfc, 0xfc, 0xf8, 0xf8, 0xf0, 0xe0, 0x80, 0x00, 0x00, 0xfc, 
+	0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xf0, 0xf8, 0xfc, 0xfc, 
+	0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 
+	0xfc, 0xf8, 0xf8, 0xf0, 0xe0, 0xc0, 0xe0, 0xf0, 0xf8, 0xf8, 0xfc, 0xfc, 
+	0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 
+	0xfc, 0xfc, 0xf8, 0xf8, 0xf0, 0xe0, 0x80, 0x00, 0x00, 0x80, 0xe0, 0xf0, 
+	0xf8, 0xf8, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 
+	0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 0xfc, 
+	0xfc, 0xfc, 0xfc, 0xf8, 0xf8, 0xf0, 0xe0, 0x80, 0xff, 0xff, 0xff, 0xff, 
+	0xff, 0xff, 0xff, 0xff, 0xff, 0xf7, 0xf3, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 
+	0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf1, 0xf7, 0xff, 0xff, 0xff, 0xff, 
+	0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 
+	0xff, 0xff, 0xff, 0x1f, 0x07, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 
+	0x01, 0x01, 0x01, 0x01, 0x03, 0x0f, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
+	0xff, 0xff, 0xff, 0x07, 0x03, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 
+	0x01, 0x01, 0x01, 0x01, 0x03, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
+	0xff, 0xff, 0xff, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
+	0xff, 0xff, 0x1f, 0x03, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 
+	0x01, 0x01, 0x01, 0x01, 0x01, 0x03, 0x07, 0xff, 0xff, 0xff, 0xff, 0xff, 
+	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
+	0xff, 0xf1, 0xe1, 0xc1, 0xc1, 0x81, 0x81, 0x81, 0x81, 0xc1, 0xc1, 0xc1, 
+	0xc1, 0xc1, 0xc1, 0xe1, 0xe1, 0xe1, 0xe1, 0xe1, 0xe1, 0xe1, 0xe1, 0xe1, 
+	0xe1, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
+	0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
+	0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 
+	0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xf0, 0xe0, 
+	0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 0xc0, 
+	0xc0, 0xe0, 0xf0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 
+	0x00, 0x01, 0x07, 0x07, 0x0f, 0x0f, 0x0f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 
+	0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 
+	0x1f, 0x1f, 0x0f, 0x0f, 0x0f, 0x07, 0x07, 0x03, 0x00, 0x00, 0x00, 0x1f, 
+	0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x00, 0x00, 0x00, 0x00, 0x00, 
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1f, 0x1f, 
+	0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x00, 0x00, 0x00, 0x00, 0x00, 
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1f, 0x1f, 
+	0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x00, 0x00, 0x00, 0x03, 0x07, 
+	0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 
+	0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x0f, 0x8f, 0xcf, 0xff, 
+	0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1f, 0x1f, 0x1f, 0x1f, 
+	0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 
+	0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 
+	0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 
+	0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 
+	0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 
+	0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 
+	0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 
+	0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 
+	0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 
+	0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 0x1f, 
+	0x1f, 0x0f, 0x07, 0x01,
+};
+/* clang-format on */
+
+void demo_backlight(void);
+void demo_start(void);
+void demo_display(void);
+void demo_show_emg(void);
+void demo_uart(void);
+void demo_music(void);
+
+int main(void)
+{
+	// set PA3-PA7 as input and activated internal Pull-Up
+	DDRA &= ~((1 << PINA3) | (1 << PINA4) | (1 << PINA5) | (1 << PINA6) | (1 << PINA7)); // Required for DMM Board 2013
+	PORTA |= ((1 << PINA3) | (1 << PINA4) | (1 << PINA5) | (1 << PINA6) | (1 << PINA7)); // Required for DMM Board 2013
+
+	// set PB0-PB3 as output
+	DDRB = 0x0F;
+	// set PB0-PB3 on high-level
+	PORTB |= 0x0F; // Required for DMM Board DMM Board 2013
+
+#ifdef GDBSTUB  
+	debug_init();  // required for debugging via UART
+#else 
+	UART_Init();  
+#endif
+	
+	LCD_Init();
+	sei(); // enable interrupts after drivers initialized
+
+	//demo_start();
+	//demo_show_emg();
+
+    //#ifndef GDBSTUB  // UART unavailable if used by GDB stub for debugging
+	//demo_uart(); 
+    //#endif
+
+	//demo_display();
+	//demo_backlight();
+	//demo_music();
+
+	Backlight_LED(BL_GREEN_ON);
+
+    
+	//Backlight_Off();
+	//LCD_Clear();
+
+	// loop forever
+    uint32_t counter = 0;
+    uint8_t button_state = 1;
+    uint8_t button_state_old = 1;
+	while (1){
+        button_state = !(PINA & 0x08);
+
+        if( button_state == 1 && button_state_old == 0 ){
+            _delay_ms(20);
+            counter = 0;
+        }
+        if( button_state == 0 && button_state_old == 1 ){
+            _delay_ms(20);
+
+            /* print to LCD */
+            LCD_Clear();
+            LCD_GotoXY(0, 0);
+            char msg[20];
+            sprintf(msg, "time: %d", counter);
+            LCD_PutString(msg);
+            LCD_Update();
+            /* ------------ */
+
+            counter = 0;
+        }
+
+        counter++;
+        button_state_old = button_state;
+        _delay_ms(1);
+    }
+}
+
+void demo_start(void)
+{
+	// Turn on green backlight
+	Backlight_LED(BL_GREEN_ON);
+
+	// Place program memory strings in framebuffer
+	LCD_PutString_P(PSTR("-DMM AVR-Board Demo- \r\n\n"));
+	LCD_PutString_P(PSTR("Always push the      \r\n"));
+	LCD_PutString_P(PSTR("joystick button to   \r\n"));
+	LCD_PutString_P(PSTR("proceed to the next  \r\n"));
+	LCD_PutString_P(PSTR("screen.              \r\n\n"));
+	LCD_PutString_P(PSTR("Enjoy the Fuck You!      "));
+
+	// Copy framebuffer to display
+	LCD_Update();
+
+	// Wait for joystick button
+	wait_joy_button();
+}
+
+void demo_show_emg(void)
+{
+	// Some counters
+	uint16_t emg_offset = 0;
+	uint8_t fb_x;
+	uint8_t fb_y;
+
+	// Turn on white backlight (red, green and blue)
+	Backlight_LED(BL_RED_ON | BL_GREEN_ON | BL_BLUE_ON);
+
+	// Clear precautionally
+	LCD_Clear();
+
+	// Copy emglogo into framebuffer
+	for (fb_y = 0; fb_y < 5; fb_y++)
+		for (fb_x = 0; fb_x < 128; fb_x++)
+			lcd_framebuffer[fb_y][fb_x] = pgm_read_byte(&emg_logo[emg_offset++]);
+
+	// Mark pages 0-4 for update
+	lcd_frameupdate = 0x1f;
+
+	// Add some text
+	LCD_GotoXY(0, 5);
+	LCD_PutString_P(PSTR(" Institut f\x81r Messt. \r\n"));
+	LCD_PutString_P(PSTR(" und Grundlagen der  \r\n"));
+	LCD_PutString_P(PSTR("   Elektrotechnik    \r\n"));
+
+	// And copy framebuffer to display
+	LCD_Update();
+
+	wait_joy_button();
+}
+
+#ifndef GDBSTUB
+void demo_uart(void)
+{
+	unsigned char loop = 1;
+	signed int c;
+	char buffer[10];
+
+	LCD_Clear();
+	Backlight_LED(BL_BLUE_ON);
+
+	LCD_GotoXY(0, 0);
+	LCD_PutString_P(PSTR("UART-Demonstration   \r\n\n"));
+	LCD_PutString_P(PSTR("Setup your terminal: \r\n"));
+	LCD_PutString_P(PSTR("9600 Baud, 8N1       \r\n"));
+	LCD_PutString_P(PSTR("Use joystick to send \r\n"));
+	LCD_PutString_P(PSTR("some strings.        \r\n"));
+
+	LCD_GotoXY(20, 7);
+	LCD_PutChar(0x10);
+
+	LCD_Update();
+
+	while ((!((PINA)&0x08)))
+		;
+	_delay_ms(20);
+	while (!((PINA)&0x08))
+		;
+
+	while (loop)
+	{
+		// Get net character from uart fifo
+		c = UART_GetChar();
+
+		// c = -1 means fifo empty
+		if (c > -1)
+		{
+			// wipe last lcd line
+			LCD_WipeLine(7);
+
+			LCD_GotoXY(0, 7);
+			LCD_PutString_P(PSTR("RX-ASCII-Code: "));
+			// Convert interger to ascii
+			itoa(c, buffer, 10);
+
+			LCD_PutString(buffer);
+			LCD_GotoXY(20, 7);
+			LCD_PutChar(0x10);
+			LCD_Update();
+			_delay_ms(10);
+		}
+
+		_delay_ms(20);
+		while (!((PINA)&0xF8))
+			; // Different to DMM 2012 and before
+
+		switch (((PINA)&0xF8))
+		{
+		case 0x78:
+			// Joystick Up
+			UART_PutString("Joystick Up.\r\n");
+			break;
+		case 0xB8:
+			// Joystick Down
+			UART_PutString("Joystick Down.\r\n");
+			break;
+		case 0xD8:
+			// Joystick Left
+			UART_PutString("Joystick Left.\r\n");
+			break;
+		case 0xE8:
+			// Joystick Right
+			UART_PutString("Joystick Right.\r\n");
+			break;
+		case 0xF0:
+			// Joystick Button
+			UART_PutString("Exit.\r\n\n");
+			loop = 0;
+			break;
+		}
+
+		_delay_ms(200);
+	}
+}
+#endif
+
+void demo_music(void)
+{
+	LCD_Clear();
+	Backlight_LED(BL_RED_ON);
+
+	LCD_GotoXY(0, 0);
+	LCD_PutString_P(PSTR("Let's dance!\r\n\n"));
+	LCD_PutString_P(PSTR("(Finest PWM sounds!)\r\n\n"));
+	LCD_Update();
+
+	Music_PlayTrack(MUSIC_Tetris);
+
+	LCD_PutString_P(PSTR("OK, that's enough...\r\n\n"));
+	LCD_Update();
+
+	wait_joy_button();
+}
+
+void demo_display(void)
+{
+	// switch white backlight on
+	Backlight_LED(BL_RED_ON | BL_GREEN_ON | BL_BLUE_ON);
+
+	// clear display
+	LCD_Clear();
+
+	// talking to the user
+	LCD_GotoXY(0, 0);
+	LCD_PutString_P(PSTR("Set some pixels."));
+
+	LCD_DrawPixel(10, 10, 1);
+	LCD_DrawPixel(12, 44, 1);
+	LCD_DrawPixel(111, 62, 1);
+	LCD_DrawPixel(101, 22, 1);
+	LCD_Update();
+
+	wait_joy_button();
+
+	// one display page requires 8 pages in dataflash
+	LCD_SavePage(0);
+	LCD_WipeLine(0);
+	LCD_GotoXY(0, 0);
+	LCD_PutString_P(PSTR("Connecting."));
+
+	LCD_DrawLine(10, 10, 12, 44, 1);
+	LCD_DrawLine(12, 44, 111, 62, 1);
+	LCD_DrawLine(111, 62, 101, 22, 1);
+	LCD_DrawLine(101, 22, 10, 10, 1);
+	LCD_Update();
+
+	wait_joy_button();
+
+	// first display page was stored at flash page 0
+	// second display page will start at 8
+	LCD_SavePage(8);
+	LCD_WipeLine(0);
+	LCD_GotoXY(0, 0);
+	LCD_PutString_P(PSTR("Adding circles."));
+
+	LCD_DrawCircle(64, 32, 10, 1);
+	LCD_DrawCircle(70, 30, 20, 1);
+	LCD_Update();
+
+	wait_joy_button();
+
+	// talking to the user
+	LCD_SavePage(16);
+	LCD_Clear();
+	LCD_GotoXY(0, 0);
+	LCD_PutString_P(PSTR("Clear/Set/XOR Demo."));
+
+	for (unsigned int fill = 0; fill < 128; fill++)
+		LCD_DrawLine(fill, 10, fill, 53, (fill / 8) & 1);
+
+	// Clear
+	LCD_DrawLine(0, 20, 127, 20, 0);
+
+	// Set
+	LCD_DrawLine(0, 30, 127, 30, 1);
+
+	// XOR
+	LCD_DrawLine(0, 40, 127, 40, 2);
+
+	LCD_Update();
+
+	wait_joy_button();
+
+	// talking to the user
+	LCD_SavePage(24);
+	LCD_Clear();
+	LCD_GotoXY(0, 0);
+	LCD_PutString_P(PSTR("Use the joystick to\r\n"));
+	LCD_PutString_P(PSTR("recall the last\r\n"));
+	LCD_PutString_P(PSTR("screens. Again,\r\n"));
+	LCD_PutString_P(PSTR("button means exit.\r\n"));
+	LCD_Update();
+
+	unsigned char loop = 1;
+
+	while (loop)
+	{
+		// wait
+		while ((!((PINA)&0xF8)))
+			; // Different to DMM 2012 and before
+		_delay_ms(300);
+		while (!((PINA)&0xF8))
+			; // Different to DMM 2012 and before
+
+		switch ((~PINA) & 0xF8) // Different to DMM 2012 and before
+		{
+		case 0x80:
+			// UP
+			LCD_LoadPage(0);
+			LCD_WipeLine(0);
+			LCD_GotoXY(0, 0);
+			LCD_PutString_P(PSTR("Screen 1"));
+			LCD_Update();
+			break;
+		case 0x40:
+			// DOWN
+			LCD_LoadPage(24);
+			LCD_WipeLine(0);
+			LCD_GotoXY(0, 0);
+			LCD_PutString_P(PSTR("Screen 4"));
+			LCD_Update();
+			break;
+		case 0x20:
+			// LEFT
+			LCD_LoadPage(8);
+			LCD_WipeLine(0);
+			LCD_GotoXY(0, 0);
+			LCD_PutString_P(PSTR("Screen 2"));
+			LCD_Update();
+			break;
+		case 0x10:
+			// RIGHT
+			LCD_LoadPage(16);
+			LCD_WipeLine(0);
+			LCD_GotoXY(0, 0);
+			LCD_PutString_P(PSTR("Screen 3"));
+			LCD_Update();
+			break;
+		case 0x08:
+			// BUTTON
+			loop = 0;
+			break;
+		}
+	}
+
+	// talking to the user
+	LCD_Clear();
+	LCD_GotoXY(0, 0);
+	LCD_PutString_P(PSTR("Push button for\r\n"));
+	LCD_PutString_P(PSTR("next demonstration.\r\n"));
+
+	wait_joy_button();
+}
+
+void demo_backlight(void)
+{
+	unsigned char led_active = 0x80;
+
+	// white backlight
+	Backlight_LED(BL_RED_ON | BL_GREEN_ON | BL_BLUE_ON);
+
+	LCD_Clear();
+	LCD_GotoXY(0, 0);
+	LCD_PutString_P(PSTR("Use the joystick to\r\n"));
+	LCD_PutString_P(PSTR("toggle the backlight\r\n"));
+	LCD_PutString_P(PSTR("on the next screen."));
+	LCD_Update();
+
+	wait_joy_button();
+
+	// no backlight
+	Backlight_Off();
+
+	LCD_Clear();
+	LCD_GotoXY(0, 0);
+	LCD_PutString_P(PSTR("         Red         \r\n"));
+	LCD_PutString_P(PSTR("                     \r\n"));
+	LCD_PutString_P(PSTR("          \x18          \r\n"));
+	LCD_PutString_P(PSTR(" Green \x1b Exit \x1a Blue \r\n"));
+	LCD_PutString_P(PSTR("          \x19          \r\n"));
+	LCD_PutString_P(PSTR("                     \r\n"));
+	LCD_PutString_P(PSTR("       Toggle        \r\n"));
+	LCD_PutString_P(PSTR("         all        \x10\r\n"));
+	LCD_Update();
+
+	while (!((PINA)&0x08))
+		;
+	_delay_ms(20);
+	while (!((PINA)&0x08))
+		;
+
+	while (led_active & 0x80)
+	{
+
+		while ((~(PINA)&0xF8))
+			; // Different to DMM 2012 and before
+		_delay_ms(300);
+		while (!((PINA)&0xF8))
+			; // Different to DMM 2012 and before
+
+		switch ((~PINA) & 0xF8) // Different to DMM 2012 and before
+		{
+		case 0x08:
+			// Button -> Exit
+			led_active = 0x00;
+
+			break;
+		case 0x80:
+			// Up -> Toggle Red
+			led_active ^= 0x01;
+			break;
+		case 0x20:
+			// Up -> Toggle Green
+			led_active ^= 0x04;
+			break;
+		case 0x10:
+			// Up -> Toggle Blue
+			led_active ^= 0x10;
+			break;
+		case 0x40:
+			// Up -> Toggle All
+			led_active ^= 0x15;
+			break;
+		}
+
+		while (!(PINA & 0xf8))
+			;
+
+		Backlight_LED(led_active & 0x15);
+
+		PORTB &= ~0x0f;
+		if (led_active & 0x01)
+			PORTB |= 0x01;
+		if (led_active & 0x04)
+			PORTB |= 0x02;
+		if (led_active & 0x10)
+			PORTB |= 0x04;
+	}
+
+	LCD_Clear();
+}
diff --git a/Firmware/src/music.c b/Firmware/src/music.c
new file mode 100644
index 0000000..5f30063
--- /dev/null
+++ b/Firmware/src/music.c
@@ -0,0 +1,109 @@
+#include <stdint.h>
+#include <avr/io.h>
+#include <avr/pgmspace.h>
+#include <util/delay.h>
+#include <util/atomic.h>
+
+#include "music.h"
+
+/* Sine lookup table for the PWM generator (pp = 32) */
+static const PROGMEM unsigned char sine_lookup[]={
+	0x10,0x13,0x16,0x19,0x1b,0x1d,0x1f,0x20,
+	0x20,0x20,0x1f,0x1d,0x1b,0x19,0x16,0x13,
+	0x10,0x0d,0x0a,0x07,0x05,0x03,0x01,0x00,
+	0x00,0x00,0x01,0x03,0x05,0x07,0x0a,0x0d
+};
+
+const MUSIC_Note MUSIC_Tetris[] = { 
+	{ MUSIC_E5, MUSIC_4 }, 
+	{ MUSIC_B4, MUSIC_8 },
+	{ MUSIC_C5, MUSIC_8 },
+	{ MUSIC_D5, MUSIC_4 },
+	{ MUSIC_C5, MUSIC_8 },
+	{ MUSIC_D5, MUSIC_8 },
+		
+	{ MUSIC_A4, MUSIC_4 },
+	{ MUSIC_A4, MUSIC_8 },
+	{ MUSIC_C5, MUSIC_8 },
+	{ MUSIC_E5, MUSIC_4 },
+	{ MUSIC_D5, MUSIC_8 },
+	{ MUSIC_C5, MUSIC_8 },
+		
+	{ MUSIC_B4, MUSIC_4 + MUSIC_8 },
+	{ MUSIC_C5, MUSIC_8 },
+	{ MUSIC_D5, MUSIC_4 },
+	{ MUSIC_E5, MUSIC_4 },
+					
+	{ MUSIC_C5, MUSIC_4 },
+	{ MUSIC_A4, MUSIC_4 },
+	{ MUSIC_A4, MUSIC_8 },
+	
+	 MUSIC_END };
+
+static void delay_ms(uint16_t delay);
+static void pwm_init (void);
+static void pwm_deinit (void);
+static void pwm_gen(uint16_t tone, uint16_t periods);
+
+void Music_PlayTrack (MUSIC_Track track) 
+{
+	pwm_init();
+	
+	while (!MUSIC_IS_END(*track)) {
+		
+		if (track->tone == 0) {			
+			delay_ms(track->duration);
+		} else {
+			uint16_t periods = (uint32_t)track->duration * (uint32_t)track->tone / 1000;
+			pwm_gen(track->tone, periods);
+			
+			delay_ms(MUSIC_32 / 2);
+		}
+		
+		++track;
+	}
+	
+	pwm_deinit();
+}
+
+static void delay_ms(uint16_t delay)
+{
+	while (delay--) 
+		_delay_ms(1);	
+}
+
+void pwm_init (void) 
+{
+	//setup PWM timer
+	DDRD |= _BV(PIND5);	// speaker pin => output
+	TCCR1A = _BV(COM1A1) | _BV(COM1A0) | _BV(WGM10); //set on match
+	TCCR1B = _BV(CS10) | _BV(WGM12); //fast PWM (8 bit), clk/1  source
+	
+	//setup sample timer (CTC Mode)	
+	TCCR3A = 0; 
+	TCCR3B = _BV(CS30) | _BV(WGM32); // clk/1
+}
+
+void pwm_deinit (void)
+{	
+	TCCR1A = 0;
+	TCCR1B = 0;	
+	TCCR3A = 0;
+	TCCR3B = 0; 
+}
+
+void pwm_gen(uint16_t tone, uint16_t periods)
+{
+	//calculate single sine sample duration
+	OCR3A = F_CPU / tone / sizeof(sine_lookup) - 1;
+		
+	for (uint16_t period=0; period < periods; ++period)  {
+		for (uint8_t spl=0; spl < sizeof(sine_lookup); ++spl) {
+			//wait for timer ready for next spl
+			loop_until_bit_is_set(TIFR3, OCF1A);	
+			TIFR3 = _BV(OCF1A); //clear OCF
+			
+			OCR1A = pgm_read_byte(sine_lookup + spl) + 0x70;
+		}	
+	}	
+}
\ No newline at end of file
diff --git a/Firmware/test/README b/Firmware/test/README
new file mode 100644
index 0000000..df5066e
--- /dev/null
+++ b/Firmware/test/README
@@ -0,0 +1,11 @@
+
+This directory is intended for PIO Unit Testing and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PIO Unit Testing:
+- https://docs.platformio.org/page/plus/unit-testing.html
diff --git a/Firmware/test/test_demo.c b/Firmware/test/test_demo.c
new file mode 100644
index 0000000..a3fcda5
--- /dev/null
+++ b/Firmware/test/test_demo.c
@@ -0,0 +1,41 @@
+#include <stdint.h>
+#include <unity.h>
+#include <util/delay.h>
+#include "fifo.h"
+
+#include "unittest_transport.h"
+
+void test_fifo(void)
+{
+    uint8_t buf[3];
+    fifo_t f;
+    fifo_init(&f, buf, sizeof(buf));
+    fifo_put(&f, 0x11);
+    fifo_put(&f, 0x22);
+    fifo_put(&f, 0x33);
+
+    TEST_ASSERT_EQUAL(0x11, fifo_get_nowait(&f));
+    TEST_ASSERT_EQUAL(0x22, fifo_get_nowait(&f));
+    TEST_ASSERT_EQUAL(0x33, fifo_get_nowait(&f));
+}
+
+int main()
+{
+    // NOTE!!! Wait for >2 secs
+    // if board doesn't support software reset via Serial.DTR/RTS
+    _delay_ms(2000);
+
+    DDRB |= 0x2;
+    PORTB &= ~0x2;
+
+    UNITY_BEGIN(); // IMPORTANT LINE!
+    RUN_TEST(test_fifo);
+    UNITY_END(); // stop unit testing
+
+    PORTB |= 0x2;
+    DDRB |= 0x4;
+    PORTB &= ~0x4;
+
+    while (1)
+        ;
+}
diff --git a/Firmware/test/unittest_transport.h b/Firmware/test/unittest_transport.h
new file mode 100644
index 0000000..0910c2e
--- /dev/null
+++ b/Firmware/test/unittest_transport.h
@@ -0,0 +1,32 @@
+#ifndef UNITTEST_TRANSPORT_H
+#define UNITTEST_TRANSPORT_H
+
+#include <avr/io.h>
+#include <stdint.h>
+#include "uart.h"
+
+void unittest_uart_begin()
+{
+    // Set Baudrate according to datasheet (16MHz -> 115200 Baud, U2X=1)
+    UBRR0 = 0x10;
+    UCSR0B |= (1<<TXEN0);
+
+    // Reset Complete-Flags
+    UCSR0A = (1 << RXC0) | (1 << TXC0) | (1 << U2X0);
+}
+
+void unittest_uart_putchar(char c)
+{
+    loop_until_bit_is_set(UCSR0A, UDRE0);
+    UDR0 = c;
+}
+
+void unittest_uart_flush()
+{
+}
+
+void unittest_uart_end()
+{
+}
+
+#endif
\ No newline at end of file
diff --git a/Hardware/.gitignore b/Hardware/.gitignore
new file mode 100644
index 0000000..03d24da
--- /dev/null
+++ b/Hardware/.gitignore
@@ -0,0 +1,26 @@
+# For PCBs designed using KiCad: http://www.kicad-pcb.org/
+# Format documentation: http://kicad-pcb.org/help/file-formats/
+
+# Temporary files
+*.000
+*.bak
+*.bck
+*.kicad_pcb-bak
+*.sch-bak
+*~
+_autosave-*
+*.tmp
+*-save.pro
+*-save.kicad_pcb
+fp-info-cache
+
+# Netlist files (exported from Eeschema)
+*.net
+
+# Autorouter files (exported from Pcbnew)
+*.dsn
+*.ses
+
+# Exported BOM files
+#*.xml
+#*.csv
diff --git a/Hardware/README.md b/Hardware/README.md
new file mode 100644
index 0000000..bfbdc1a
--- /dev/null
+++ b/Hardware/README.md
@@ -0,0 +1,4 @@
+# Projektspezifische Hardware 
+
+Die EDA/CAD-Dateien und BOM von Erweiterungsplatinen.
+Präferierte EDA-Software: [KiCad](https://kicad-pcb.org/).
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..f01a22e
--- /dev/null
+++ b/README.md
@@ -0,0 +1,42 @@
+# DMM-Demo
+
+Zum Flashen des Bootloaders und des Demonstrationsprojektes siehe 
+[Firmware/README.md](https://teach.emg.ing.tu-bs.de/git/dmm/dmm-demo/-/tree/master/Firmware)
+
+Die Dokumentation ist in diesem README zu hinterlegen. Das Einfügen von Bildern
+aus der Git-Repository ist erwünscht, diese sollten aber nicht zu groß sein. 
+Bei der Struktur kann grob am nachfolgenden Template orientiert werden.
+
+# Name des Projektes
+
+Eigene Beschreibung des Projektes.
+
+### Gruppenmitglieder
+*  Dr.-Ing. Martin Oehler
+*  Dipl.-Ing. Timo Klingeberg
+*  Christof Wehrmann, M.Sc.
+*  Ilya Elenskiy, M.Sc. (@ilyelens)
+
+>>>
+**Aufgabenstellung des emg:**
+
+Es ist mit dem DMM-Board XYZ zu implementieren...
+>>>
+
+### Aufgabenverteilung
+@ilyelens: PlatformIO eindrichten, PWM-Demonstration.
+...
+
+### Zeitplan
+...
+
+## Dokumentation
+### Hardware
+Bauteilliste, Dokumentation, ...
+
+### Software
+Dokumentation
+
+## Ergebnisse
+
+Bilder oder Auswertungen vom Tests, ggf. Link zum Video usw.
\ No newline at end of file
diff --git a/Slides/README.md b/Slides/README.md
new file mode 100644
index 0000000..d7de983
--- /dev/null
+++ b/Slides/README.md
@@ -0,0 +1,3 @@
+# Präsentation
+
+Hier soll die Präsentation (ggf. mit LaTeX Code) hinterlegt werden.
\ No newline at end of file
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