Replace makefile by generic board definition

Makefile

@@ -1,63 +0,0 @@
-MCU_TARGET     = atmega328p
-MCU_FREQ       = 16000000UL
-MCU_TTY        = /dev/ttyUSB0
-MCU_TTY_BAUD   = 57600
-MCU_PROGRAMMER = arduino
-
-PRG            = main
-OBJ            = main.o
-
-OPTIMIZE       = -O2
-DEFS           = -DF_CPU=$(MCU_FREQ) -DBAUDRATE=$(MCU_TTY_BAUD)
-LIBS           =
-# You should not have to change anything below here.
-CC             = avr-gcc
-# Override is only needed by avr-lib build system.
-override CFLAGS        = -g --std=c99 -Wall $(OPTIMIZE) -mmcu=$(MCU_TARGET) $(DEFS)
-override LDFLAGS       = -Wl,-Map,$(PRG).map
-OBJCOPY        = avr-objcopy
-OBJDUMP        = avr-objdump
-
-all: $(PRG).elf $(PRG).asm
-
-$(PRG).elf: $(OBJ)
-	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^ $(LIBS)
-
-# dependencies:
-
-clean:
-	rm -rf *.o $(PRG).elf *.eps *.png *.pdf *.bak *.asm *.hex
-	rm -rf *.lst *.map $(EXTRA_CLEAN_FILES)
-
-lst:  $(PRG).lst
-
-%.lst: %.elf
-	$(OBJDUMP) -h -S $< > $@
-
-# Rules for building the .text rom images
-text: hex bin srec
-
-hex:  $(PRG).hex
-
-bin:  $(PRG).bin
-
-%.hex: %.elf
-	$(OBJCOPY) -j .text -j .data -O ihex $< $@
-
-%.bin: %.elf
-	$(OBJCOPY) -j .text -j .data -O binary $< $@
-
-# to get the final asm code
-
-%.asm: %.elf
-	$(OBJDUMP) -z -j .text -m avr5 -d $< > $@
-
-reset:
-	avrdude -v -p$(MCU_TARGET) -c$(MCU_PROGRAMMER) -P$(MCU_TTY) -b$(MCU_TTY_BAUD)
-
-flash: $(PRG).hex
-	avrdude -v -p$(MCU_TARGET) -c$(MCU_PROGRAMMER) -P$(MCU_TTY) -b$(MCU_TTY_BAUD) -u -U flash:w:$(PRG).hex
-
-screen:
-	screen $(MCU_TTY) $(MCU_TTY_BAUD)
-

boards/relaycard.mk

@@ -0,0 +1,7 @@
+include boards/nano.mk
+
+CPPFLAGS += -DBAUDRATE=$(AVRDUDE_BAUD)
+
+ifndef PROG
+PROG = uart-relaycard
+endif