From: Martin Mares <mj@ucw.cz>
Date: Sun, 12 Mar 2017 00:32:47 +0000 (+0100)
Subject: Sphinx: init
X-Git-Url: http://mj.ucw.cz/gitweb/?a=commitdiff_plain;h=70161d341f3e369ff09c2e8ab0512f0e73f3cd56;hp=23578f82f8ad51c14dc23467d41a9f80a7ff49aa;p=misc.git

Sphinx: init
---

diff --git a/sphinx/Makefile b/sphinx/Makefile
new file mode 100644
index 0000000..bf9b8ea
--- /dev/null
+++ b/sphinx/Makefile
@@ -0,0 +1,21 @@
+all: sphinx.flash
+
+GCF=-Os -mmcu=attiny13 -std=gnu99 -Wall -W -Wno-parentheses
+
+%.flash: %.hex
+	avrdude -p t13 -c usbtiny -v -U flash:w:$<: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/sphinx/sphinx.c b/sphinx/sphinx.c
new file mode 100644
index 0000000..7355d0b
--- /dev/null
+++ b/sphinx/sphinx.c
@@ -0,0 +1,64 @@
+/*
+ *	Asking Riddles at the Entrance to Garage
+ *
+ *	(c) 2017 Martin Mares <mj@ucw.cz>
+ */
+
+/*
+ *	Pin assignment (component side view; "*" marks inverted signals)
+ *
+ *			+-------------------+
+ *	                | RESET*        VCC |
+ *	button         	| PB3           SCK |
+ *	output       	| PB4          MISO |
+ *			| GND      PB0=MOSI |	diagnostic LED*
+ *			+-------------------+
+ */
+
+#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)
+{
+	DDRB |= B(PB0);			// PB0: output
+	DDRB |= B(PB4);			// PB4: output
+	PORTB &= ~B(PB3);		// PB3: input, no pullup
+
+	for (byte i=0; i<5; i++) {
+		PORTB &= ~B(PB0);
+		sleep(100);
+		PORTB |= B(PB0);
+		sleep(100);
+	}
+
+	for (;;) {
+		sleep(10);
+		if (PINB & B(PB3)) {
+			PORTB &= ~B(PB0);
+			PORTB |= B(PB4);
+		} else {
+			PORTB |= B(PB0);
+			PORTB &= ~B(PB4);
+		}
+	}
+
+	for (;;) {
+		set_sleep_mode(SLEEP_MODE_PWR_DOWN);
+		sleep_mode();
+	}
+}