From 01e1d3b0da770db9cc4dc9a7fd649548e60ac0ec Mon Sep 17 00:00:00 2001
From: "Jan \"Yenya\" Kasprzak" <kas@fi.muni.cz>
Date: Thu, 30 Aug 2012 01:58:19 +0200
Subject: [PATCH] preliminary long keypress to power-down

---
 buttons.c | 40 ++++++++++++++++++++++++++++++----------
 lights.h  |  3 +++
 main.c    | 19 ++++++++++++-------
 3 files changed, 45 insertions(+), 17 deletions(-)

diff --git a/buttons.c b/buttons.c
index b58ca2a..d5a18be 100644
--- a/buttons.c
+++ b/buttons.c
@@ -1,26 +1,48 @@
 #include <avr/io.h>
 #include <avr/interrupt.h>
+#include <avr/sleep.h>
 
 #include "lights.h"
 
 static uint16_t button_start[N_BUTTONS];
 static unsigned char button_pressed[N_BUTTONS];
 
+static unsigned char sleep_after_release;
+
 void init_buttons()
 {
-	// MCUCR |= _BV(ISC00); // any edge generates IRQ
-	// GIMSK |= _BV(INT0); // enable INT0
 	DDRB &= ~(_BV(PB6) | _BV(PB0));
 	PORTB |= _BV(PB6) | _BV(PB0);
 
+	sleep_after_release = 0;
 	// log_byte(PORTB);
 }
 
-extern unsigned char led1_counter;
-
 static void inline long_press(unsigned char n)
 {
-	led_set_status(2);
+	sleep_after_release = 1;
+	gpio_set(1, 1);
+}
+
+static void do_sleep()
+{
+	// led_set_status(2);
+	// MCUCR |= _BV(ISC00); // any edge generates IRQ
+	log_byte(0xb0);
+	log_flush();
+	set_sleep_mode(SLEEP_MODE_PWR_DOWN);
+	PORTA = 0;
+	PORTB = 0;
+	DDRA = 0;
+	DDRB = 0;
+	GIMSK |= _BV(INT0); // enable INT0
+	sleep_enable();
+	sei();
+	sleep_cpu();
+	sleep_disable();
+	cli();
+	GIMSK &= ~_BV(INT0); // disable INT0
+	hw_setup();
 }
 
 static void inline short_press(unsigned char n)
@@ -66,19 +88,17 @@ void timer_check_buttons()
 				button_pressed[i] = 0;
 				if (duration > 6 && duration < 30)
 					short_press(i);
+				if (sleep_after_release)
+					do_sleep();
 			}
 		}
 	}
 }
 
-#if 0
 ISR(INT0_vect)
 {
-	unsigned char tmpval = PINB & _BV(PB6);
-
-	gpio_set(GPIO_LED2, tmpval);
+	hw_setup();
 	log_byte(0xbb);
 	log_flush();
 }
-#endif
 
diff --git a/lights.h b/lights.h
index d357b55..56345fb 100644
--- a/lights.h
+++ b/lights.h
@@ -64,5 +64,8 @@ void led_set_status(unsigned char status);
 void init_buttons();
 void timer_check_buttons();
 
+/* init.c */
+void hw_setup();
+
 #endif /* !LIGHTS_H__ */
 
diff --git a/main.c b/main.c
index 57ffa14..416a651 100644
--- a/main.c
+++ b/main.c
@@ -5,12 +5,8 @@
 
 #include "lights.h"
 
-int main(void)
+void hw_setup()
 {
-	log_init();
-
-	_delay_ms(1500);
-
 	init_pwm();
 	init_adc();
 	init_tmr();
@@ -21,9 +17,18 @@ int main(void)
 	ambient_init();
 	pattern_init();
 
-	log_set_state(3);
-
 	set_sleep_mode(SLEEP_MODE_IDLE);
+}
+
+int main(void)
+{
+	log_init();
+
+	_delay_ms(1500);
+
+	hw_setup();
+
+	log_set_state(3);
 
 	sei();
 #if 1
-- 
2.39.3