From a444b197e7f5d489227ea6952b78201f26aa82a0 Mon Sep 17 00:00:00 2001
From: "Jan \"Yenya\" Kasprzak" <kas@fi.muni.cz>
Date: Wed, 3 Oct 2012 21:33:46 +0200
Subject: [PATCH] main.c: allow only long keypress to wake us

---
 firmware/main.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/firmware/main.c b/firmware/main.c
index 5db08b1..d10a322 100644
--- a/firmware/main.c
+++ b/firmware/main.c
@@ -35,6 +35,10 @@ void hw_suspend()
 
 void power_down()
 {
+	uint16_t wake_count = 0;
+	unsigned char btn;
+
+sleep_again:
 	// enable PCINT14, so that user can wake up later
         GIMSK |= _BV(PCIE1);
         PCMSK1 |= _BV(PCINT14);
@@ -55,6 +59,20 @@ void power_down()
 	GIMSK &= ~_BV(PCIE1);
 	PCMSK1 &= ~_BV(PCINT14);
 
+        // allow wakeup by long button-press only
+        for (btn = 0; btn < 5; btn++) {
+                if ((PINB & _BV(PB6)) != 0) {
+                        wake_count++;
+                        goto sleep_again;;
+                }
+                _delay_ms(100);
+        }
+
+	// ok, so I will wake up
+	log_byte(0xb1);
+	log_word(wake_count);
+	log_flush();
+
 	hw_setup();
 }
 
-- 
2.39.3