diff -r 000000000000 -r bdcf2c76d86e firmware/Makefile
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/firmware/Makefile	Fri May 12 15:33:22 2017 +0200
@@ -0,0 +1,80 @@
+# Name: Makefile
+# Project: hid-data example
+# Author: Christian Starkjohann
+# Creation Date: 2008-04-07
+# Tabsize: 4
+# Copyright: (c) 2008 by OBJECTIVE DEVELOPMENT Software GmbH
+# License: GNU GPL v2 (see License.txt), GNU GPL v3 or proprietary (CommercialLicense.txt)
+
+DEVICE  = attiny2313
+F_CPU   = 8000000	# in Hz
+AVRDUDE = avrdude -c usbasp -p $(DEVICE) -B .5 -P USB -u
+
+CFLAGS  = -I. -DDEBUG_LEVEL=0
+OBJECTS = main.o
+
+COMPILE = avr-gcc -Wall -Os -DF_CPU=$(F_CPU) $(CFLAGS) -mmcu=$(DEVICE)
+
+FUSE_H = 0x9f
+FUSE_L = 0xe4
+
+# symbolic targets:
+help:
+	@echo "This Makefile has no default rule. Use one of the following:"
+	@echo "make hex ....... to build main.hex"
+	@echo "make program ... to flash fuses and firmware"
+	@echo "make fuse ...... to flash the fuses"
+	@echo "make flash ..... to flash the firmware (use this on metaboard)"
+	@echo "make clean ..... to delete objects and hex file"
+
+hex: main.hex
+
+program: flash fuse
+
+# rule for programming fuse bits:
+fuse:
+	@[ "$(FUSE_H)" != "" -a "$(FUSE_L)" != "" ] || \
+		{ echo "*** Edit Makefile and choose values for FUSE_L and FUSE_H!"; exit 1; }
+	$(AVRDUDE) -U hfuse:w:$(FUSE_H):m -U lfuse:w:$(FUSE_L):m
+
+# rule for uploading firmware:
+flash: main.hex
+	$(AVRDUDE) -U flash:w:main.hex:i
+
+# rule for deleting dependent files (those which can be built by Make):
+clean:
+	rm -f main.hex main.lst main.obj main.cof main.list main.map main.eep.hex main.elf *.o main.s 
+
+# Generic rule for compiling C files:
+.c.o:
+	$(COMPILE) -c $< -o $@
+
+# Generic rule for assembling Assembler source files:
+.S.o:
+	$(COMPILE) -x assembler-with-cpp -c $< -o $@
+# "-x assembler-with-cpp" should not be necessary since this is the default
+# file type for the .S (with capital S) extension. However, upper case
+# characters are not always preserved on Windows. To ensure WinAVR
+# compatibility define the file type manually.
+
+# Generic rule for compiling C to assembler, used for debugging only.
+.c.s:
+	$(COMPILE) -S $< -o $@
+
+# file targets:
+
+main.elf: $(OBJECTS)	# usbdrv dependency only needed because we copy it
+	$(COMPILE) -o main.elf $(OBJECTS)
+
+main.hex: main.elf
+	rm -f main.hex main.eep.hex
+	avr-objcopy -j .text -j .data -O ihex main.elf main.hex
+	avr-size main.hex
+
+# debugging targets:
+
+disasm:	main.elf
+	avr-objdump -d main.elf
+
+cpp:
+	$(COMPILE) -E main.c