From bada196ff124be7e283cbd9695ef1d97e2f35035 Mon Sep 17 00:00:00 2001
From: David Lamparter <equinox@diac24.net>
Date: Wed, 19 Sep 2012 19:42:13 +0200
Subject: Makefile: persist eeprom over chip erase

---
 .gitignore | 1 +
 Makefile   | 7 ++++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/.gitignore b/.gitignore
index 085d864..18bc66d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,4 @@
 *.aux
 *.log
 *.pdf
+eeprom
diff --git a/Makefile b/Makefile
index b3e7d33..c082c6f 100644
--- a/Makefile
+++ b/Makefile
@@ -11,13 +11,18 @@ CFLAGS_LD=-Wl,-T,avr4-signature.x
 CFLAGS=${CFLAGS_WARN} ${CFLAGS_OPT} ${CFLAGS_LD}
 MCU_door=48
 MCU_lightctrl=88
+AVRDUDE=avrdude
 
 love: $(foreach target,$(TARGETS),$(target).elf)
 	avr-size $^
 
 ifdef TARGET
 flash: ${TARGET}.flash
-	avrdude -p m$(MCU_$(basename $<)) -c stk500v2 -P avrdoper -y -U flash:w:$<
+	$(AVRDUDE) -p m$(MCU_$(basename $<)) -c stk500v2 -P avrdoper -y \
+		-U eeprom:r:eeprom:r
+	$(AVRDUDE) -p m$(MCU_$(basename $<)) -c stk500v2 -P avrdoper -y \
+		-U flash:w:$< \
+		-U eeprom:w:eeprom:r
 else
 flash:
 	@echo the flash target is available only with TARGET set to something. use e.g. \"make flash TARGET=door\" >&2
-- 
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