First commit of partly-working reflow oven controller.

Makefile

@@ -0,0 +1,67 @@
+# Makefile
+
+DEVICE     = attiny88
+CLOCK      = 4000000
+PROGRAMMER = -c buspirate -P /dev/ttyUSB0
+OBJECTS    = reflow.o display.o font.o i2c.o menu.o spi.o therm.o timer.o config.o beep.o control.o fields.o profile.o
+SRC        = $(OBJECTS:%.o=%.c)
+#FUSES      = -U lfuse:w:0xEC:m -U hfuse:w:0xDF:m -U efuse:w:0xFF:m -U lock:w:0xFF:m
+FUSES      = -U lfuse:w:0xEC:m -U hfuse:w:0xDF:m -U efuse:w:0x07:m
+
+# For computing fuse byte values for other devices and options see
+# the fuse bit calculator at http://www.engbedded.com/fusecalc/
+
+#AVRDUDE = avrdude $(PROGRAMMER) -p $(DEVICE)
+AVRDUDE = avrdude $(PROGRAMMER) -p $(DEVICE) -V
+# Don't use -Werror in the link stage to avoid a compiler bug which is fixed in gcc 4.8.3
+CFLAGS = -Werror
+COMPILE = avr-gcc -std=c99 -Wall -Wl,-Map,$@.map -Os -g -DF_CPU=$(CLOCK) -mmcu=$(DEVICE) -mcall-prologues -flto -fuse-linker-plugin
+
+# symbolic targets:
+all:	reflow.hex
+
+.c.o:
+	$(COMPILE) $(CFLAGS) -c $< -o $@
+
+.S.o:
+	$(COMPILE) -x assembler-with-cpp -c $< -o $@
+
+.c.s:
+	$(COMPILE) $(CFLAGS) -S $< -o $@
+
+flash:
+	$(AVRDUDE) -U flash:w:reflow.hex:i
+
+fuse:
+	$(AVRDUDE) $(FUSES)
+
+install: all flash fuse
+
+# if you use a bootloader, change the command below appropriately:
+load: all
+	bootloadHID reflow.hex
+
+clean:
+	rm -f reflow.hex reflow.elf $(OBJECTS)
+
+# file targets:
+#reflow.elf: $(SRC)
+#	$(COMPILE) $(LDFLAGS) -o reflow.elf $(SRC)
+
+reflow.elf: $(OBJECTS)
+	$(COMPILE) $(LDFLAGS) -o reflow.elf $(OBJECTS)
+
+reflow.hex: reflow.elf
+	rm -f reflow.hex
+	avr-objcopy -j .text -j .data -O ihex reflow.elf reflow.hex
+	avr-size --format=avr --mcu=$(DEVICE) reflow.elf
+# If you have an EEPROM section, you must also create a hex file for the
+# EEPROM and add it to the "flash" target.
+
+# Targets for code debugging and analysis:
+disasm:	reflow.elf
+	avr-objdump -d reflow.elf
+
+cpp:
+	$(COMPILE) -E reflow.c
+