From a42490b6e32cecc691f7824b68e8b941661a1e74 Mon Sep 17 00:00:00 2001
From: Martin Mares <mj@ucw.cz>
Date: Fri, 23 Aug 2013 16:21:49 +0200
Subject: [PATCH] Waking up Ogion using ATtiny

---
 tenar/Makefile | 22 +++++++++++++++++++
 tenar/tenar.c  | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 80 insertions(+)
 create mode 100644 tenar/Makefile
 create mode 100644 tenar/tenar.c

diff --git a/tenar/Makefile b/tenar/Makefile
new file mode 100644
index 0000000..a557ff1
--- /dev/null
+++ b/tenar/Makefile
@@ -0,0 +1,22 @@
+all: tenar.flash
+
+GCF=-Os -mmcu=attiny13 -std=gnu99 -Wall -W -Wno-parentheses
+
+%.flash: %.hex
+	scp $< abacus:avr/tmp/
+	ssh root@abacus 'cd ~mj/avr/bin && ./avrdude -p t13 -c dapa -v -U flash:w:../tmp/$<:i'
+
+%.hex: %.exe
+	avr-objcopy -j .text -j .data -O ihex $< $@
+
+%.exe: %.c
+	avr-gcc $< -o $@ $(GCF)
+
+%.s: %.c
+	avr-gcc $< -o $@ $(GCF) -S
+
+clean:
+	rm -f *~ *.o *.s *.exe *.hex
+
+.SECONDARY:
+.PHONY: all clean
diff --git a/tenar/tenar.c b/tenar/tenar.c
new file mode 100644
index 0000000..d69c0ad
--- /dev/null
+++ b/tenar/tenar.c
@@ -0,0 +1,58 @@
+/*
+ *	Waking Up Ogion
+ *
+ *	(c) 2013 Martin Mares <mj@ucw.cz>
+ */
+
+/*
+ *	Pin assignment (component side view; "*" marks inverted signals)
+ *
+ *			+-------------------+
+ *	                | RESET*        VCC |
+ *	output RESET*	| PB3           SCK |
+ *	diagnostic LED*	| PB4          MISO |
+ *			| GND          MOSI |
+ *			+-------------------+
+ */
+
+#define F_CPU 1200000UL
+
+#include <avr/io.h>
+#include <avr/sleep.h>
+#include <util/delay.h>
+
+typedef uint8_t byte;
+
+#define B(x) (1U<<(x))
+
+static void sleep(uint16_t millisec)
+{
+	while (millisec) {
+		_delay_ms(1);
+		millisec--;
+	}
+}
+
+int main(void)
+{
+	PORTB &= ~B(PB3);		// PB3: tri-stated
+	DDRB |= B(PB4);			// PB4: output
+
+	for (byte i=0; i<5; i++) {
+		PORTB &= ~B(PB4);
+		sleep(100);
+		PORTB |= B(PB4);
+		sleep(900);
+	}
+
+	PORTB &= ~B(PB4);
+	DDRB |= B(PB3);			// PB3: output 0
+	sleep(300);
+	DDRB &= ~B(PB3);		// PB3: tri-state
+	PORTB |= B(PB4);
+
+	for (;;) {
+		set_sleep_mode(SLEEP_MODE_PWR_DOWN);
+		sleep_mode();
+	}
+}
-- 
2.39.2