From 0816cecf1ea85ff38717c0256cec92b025c5b538 Mon Sep 17 00:00:00 2001
From: Michael Moon <triffid.hunter@gmail.com>
Date: Mon, 13 Dec 2010 21:34:03 +1100
Subject: [PATCH] UNTESTED fuse programming support

---
 Makefile | 10 +++++++++-
 README   | 15 +++++++++++++++
 fuses.h  | 27 +++++++++++++++++++++++++++
 mendel.c |  1 +
 4 files changed, 52 insertions(+), 1 deletion(-)
 create mode 100644 fuses.h

diff --git a/Makefile b/Makefile
index 362b134..5d8019e 100644
--- a/Makefile
+++ b/Makefile
@@ -122,8 +122,16 @@ program: $(PROGRAM).hex config.h
 	$(AVRDUDE) -cstk500v1 -b$(PROGBAUD) -p$(MCU_TARGET) -P$(PROGPORT) -C$(AVRDUDECONF) -U flash:w:$^
 	stty 115200 raw ignbrk -hup -echo ixoff < $(PROGPORT)
 
+program-fuses:
+	avr-objdump -s -j .fuse mendel.o | perl -ne '/\s0000\s([0-9a-f]{2})/ && print "$$1\n"' > lfuse
+	avr-objdump -s -j .fuse mendel.o | perl -ne '/\s0000\s..([0-9a-f]{2})/ && print "$$1\n"' > hfuse
+	avr-objdump -s -j .fuse mendel.o | perl -ne '/\s0000\s....([0-9a-f]{2})/ && print "$$1\n"' > efuse
+	$(AVRDUDE) -cstk500v1 -b$(PROGBAUD) -p$(MCU_TARGET) -P$(PROGPORT) -C$(AVRDUDECONF) -U lfuse:w:lfuse
+	$(AVRDUDE) -cstk500v1 -b$(PROGBAUD) -p$(MCU_TARGET) -P$(PROGPORT) -C$(AVRDUDECONF) -U hfuse:w:hfuse
+	$(AVRDUDE) -cstk500v1 -b$(PROGBAUD) -p$(MCU_TARGET) -P$(PROGPORT) -C$(AVRDUDECONF) -U efuse:w:efuse
+
 clean:
-	rm -rf *.o *.elf *.lst *.map *.sym *.lss *.eep *.srec *.bin *.hex *.al *.i *.s *~
+	rm -rf *.o *.elf *.lst *.map *.sym *.lss *.eep *.srec *.bin *.hex *.al *.i *.s *~ *fuse
 
 size: $(PROGRAM).elf
 	@echo "  SIZE                   Atmega168        Atmega328p       Atmega644"
diff --git a/README b/README
index cd05cf9..d27534a 100644
--- a/README
+++ b/README
@@ -18,10 +18,25 @@ Rewrite of Reprap Mendel firmware:
 2) check programming settings in Makefile
 3) make
 4) make program
+4a) if programming blank chip, make program-fuses
 5) ./sender.sh
 6) have a play, go to 1) if not right
 7) try printing something!
 
+##############################################################################
+#                                                                            #
+# Requirements                                                               #
+#                                                                            #
+##############################################################################
+
+Compile:
+	gnu make
+	binutils, gcc, etc built for avr target (avr-gcc, avr-as, etc)
+	avr-libc
+Program:
+	avrdude
+	something that avrdude supports: bootloader, separate programmer, whatever
+
 ##############################################################################
 #                                                                            #
 # License                                                                    #
diff --git a/fuses.h b/fuses.h
new file mode 100644
index 0000000..4f6e411
--- /dev/null
+++ b/fuses.h
@@ -0,0 +1,27 @@
+#if defined (__AVR_ATmega168__)
+FUSES = {
+	.low = FUSE_CKSEL3 & FUSE_SUT0,
+	.high = FUSE_SPIEN,
+	.extended = FUSE_BOOTSZ1 & FUSE_BOOTSZ0,
+};
+#elif defined (__AVR_ATmega328P__)
+FUSES = {
+	.low = FUSE_CKSEL3 & FUSE_SUT0,
+	.high = FUSE_SPIEN & FUSE_BOOTSZ0 & FUSE_BOOTSZ1,
+	.extended = EFUSE_DEFAULT,
+};
+#elif defined (__AVR_ATmega644__) || defined (__AVR_ATmega644P__)
+FUSES = {
+	.low = FUSE_CKSEL3 & FUSE_SUT0,
+	.high = FUSE_SPIEN & FUSE_BOOTSZ0 & FUSE_BOOTSZ1,
+	.extended = EFUSE_DEFAULT,
+};
+#elif defined (__AVR_ATmega1280__)
+FUSES = {
+	.low = FUSE_CKSEL3 & FUSE_SUT0,
+	.high = FUSE_SPIEN & FUSE_BOOTSZ0 & FUSE_BOOTSZ1,
+	.extended = EFUSE_DEFAULT,
+};
+#else
+#warning No fuse definitions for this chip in fuses.h!
+#endif
diff --git a/mendel.c b/mendel.c
index 919822b..e36387d 100644
--- a/mendel.c
+++ b/mendel.c
@@ -3,6 +3,7 @@
 #include	<avr/interrupt.h>
 
 #include	"config.h"
+#include	"fuses.h"
 
 #include	"serial.h"
 #include	"dda_queue.h"