From bc8dbcc505b805cbbce07971afe87727e7dd522a Mon Sep 17 00:00:00 2001
From: "Matthias P. Braendli" <matthias.braendli@mpb.li>
Date: Sun, 17 Nov 2019 16:48:37 +0100
Subject: Fix fuse settings to use crystal, not ext clock

---
 sw/Makefile   | 5 ++++-
 sw/README.rst | 4 ++--
 2 files changed, 6 insertions(+), 3 deletions(-)

(limited to 'sw')

diff --git a/sw/Makefile b/sw/Makefile
index 0b76729..259583d 100644
--- a/sw/Makefile
+++ b/sw/Makefile
@@ -122,10 +122,13 @@ program: $(APP_HEX)
 	$(AVRDUDE) $(AVRDUDE_FLAGS) -c $(PROG) -P $(AVRDUDE_DEV) -p $(AVRDUDE_PART) -U flash:w:$(BUILD_DIR)/$(APP_HEX) -v
 
 fuse:
-	$(AVRDUDE) $(AVRDUDE_FLAGS) -c $(PROG) -P $(AVRDUDE_DEV) -p $(AVRDUDE_PART) -U lfuse:w:0x60:m -U hfuse:w:0xdc:m -U efuse:w:0xff:m -v
+	$(AVRDUDE) $(AVRDUDE_FLAGS) -c $(PROG) -P $(AVRDUDE_DEV) -p $(AVRDUDE_PART) -U lfuse:w:0x7e:m -U hfuse:w:0xd9:m -U efuse:w:0xfc:m -v
 
 interactive:
 	$(AVRDUDE) $(AVRDUDE_FLAGS) -c $(PROG) -P $(AVRDUDE_DEV) -p $(AVRDUDE_PART) -t -v
 
+help:
+	@echo "targets: all, program, fuse, interactive"
+
 doxygen:
 	doxygen ./Doxyfile
diff --git a/sw/README.rst b/sw/README.rst
index dc59298..9869c4d 100644
--- a/sw/README.rst
+++ b/sw/README.rst
@@ -41,11 +41,11 @@ TODO
 Reglages eFuse
 --------------
 
-- Low: Horloge externe, diviseur /8 actif
+- Low: Horloge crystal 8MHz ou plus, Startup time PWRDWN/RESET 1K/14CK + 4.1ms, diviseur /8 actif
 - High: tout par défaut
 - Ext: Brownout detector: 4.3V
 
-Commande AVRdude equivalente: `-U lfuse:w:0x50:m -U hfuse:w:0xd9:m -U efuse:w:0xfc:m`
+Commande AVRdude equivalente: `-U lfuse:w:0x7e:m -U hfuse:w:0xd9:m -U efuse:w:0xfc:m`
 
 Acknowledgements
 ================
-- 
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