From cda16639cbf19d6eb5c11f05f1045e54b3fdaba9 Mon Sep 17 00:00:00 2001
From: Nao Pross <naopross@thearcway.org>
Date: Tue, 30 Oct 2018 12:07:58 +0100
Subject: [avr] Add test program for IO and basic usart

---
 sw-avr/rom-loader/makefile | 25 ++++++++++++++++---------
 1 file changed, 16 insertions(+), 9 deletions(-)

(limited to 'sw-avr/rom-loader/makefile')

diff --git a/sw-avr/rom-loader/makefile b/sw-avr/rom-loader/makefile
index e68174f..85222c8 100644
--- a/sw-avr/rom-loader/makefile
+++ b/sw-avr/rom-loader/makefile
@@ -1,17 +1,24 @@
-CC=avr-gcc
-CARGS=-Wall -mmcu=atmega328p -D__AVR_ATmega328p__ -Os -I.
+SOURCES := main.c usart.c
+OBJECTS := $(patsubst %.c,%.o,$(SOURCES))
 
-SOURCES=main.c
+CFLAGS  := -Wall -mmcu=atmega328p -Os -I. \
+            -D__AVR_ATmega328p__ -DF_CPU=1000000UL -DBAUD=9600
+LDFLAGS := 
 
 .PHONY: all flash clean
-all: rom-loader.bin
+all: rom-loader.hex
 
-flash: rom-loader.bin
-	avrdude -c usbasp -p atmega328p
+flash: rom-loader.hex
+	avrdude -c usbasp -p atmega328p -U flash:w:$<
 
 clean:
-	rm rom-loader.bin
+	rm -f *.bin *.hex *.o
 
-rom-loader.bin: $(SOURCES)
-	$(CC) $(CARGS) $< -o $@
+rom-loader.hex: rom-loader.bin
+	avr-objcopy -R .eeprom -O ihex $< $@
 
+rom-loader.bin: $(OBJECTS)
+	avr-gcc $(CFLAGS) $(OBJECTS) -o $@ $(LDFLAGS)
+
+%.o: %.c
+	avr-gcc $(CFLAGS) $< -c -o $@ $(LDFLAGS)
-- 
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