big update of the forgotten

avr-c/Makefile

@@ -0,0 +1,29 @@
+# Makefile for Witness Seed 2.0 on AVR
+
+CC = avr-gcc
+CFLAGS = -mmcu=atmega328p -DF_CPU=16000000UL -Os
+OBJCOPY = avr-objcopy
+AVRDUDE = avrdude
+
+TARGET = witness_seed
+SOURCES = witness_seed.c
+OBJECTS = $(SOURCES:.c=.o)
+
+all: $(TARGET).hex
+
+$(TARGET).o: $(SOURCES)
+    $(CC) $(CFLAGS) -c $< -o $@
+
+$(TARGET).elf: $(OBJECTS)
+    $(CC) $(CFLAGS) -o $@ $^
+
+$(TARGET).hex: $(TARGET).elf
+    $(OBJCOPY) -O ihex -R .eeprom $< $@
+
+flash: $(TARGET).hex
+    $(AVRDUDE) -F -V -c arduino -p ATMEGA328P -P /dev/ttyUSB0 -b 115200 -U flash:w:$<
+
+clean:
+    rm -f $(OBJECTS) $(TARGET).elf $(TARGET).hex
+
+.PHONY: all flash clean