From ec6f8377e1d09e01a3e41dc298d6c88925de56ce Mon Sep 17 00:00:00 2001
From: "Jan \"Yenya\" Kasprzak" <kas@fi.muni.cz>
Date: Thu, 30 Aug 2012 01:19:46 +0200
Subject: [PATCH] buttons: long/short keypress detection

---
 buttons.c | 38 ++++++++++++++++++++++++++------------
 1 file changed, 26 insertions(+), 12 deletions(-)

diff --git a/buttons.c b/buttons.c
index 83664c7..b58ca2a 100644
--- a/buttons.c
+++ b/buttons.c
@@ -18,6 +18,16 @@ void init_buttons()
 
 extern unsigned char led1_counter;
 
+static void inline long_press(unsigned char n)
+{
+	led_set_status(2);
+}
+
+static void inline short_press(unsigned char n)
+{
+	led_set_status(1);
+}
+
 void timer_check_buttons()
 {
 	unsigned char pinb = PINB;
@@ -28,32 +38,36 @@ void timer_check_buttons()
 	};
 	for (i = 0; i < N_BUTTONS; i++) {
 		if (!port_states[i]) { // is pressed
-			if (button_pressed[i]) { // been already pressed
-				// TODO long button press
-				/*
-				uint16_t duration = jiffies - button_start[i];
-				if (duration > 10 && duration < 40) {
-					gpio_set(GPIO_LED2, 1);
-				}
-				*/
-			} else { // begin of button press
+			if (button_pressed[i] == 0) {
+				// begin of button press
 				button_pressed[i] = 1;
 				button_start[i] = jiffies;
+#if 0
 				// log_byte(0xC0);
 				// log_word(jiffies);
+#endif
+			} else if (button_pressed[i] == 1) {
+				// been already pressed
+				uint16_t duration = jiffies - button_start[i];
+				if (duration > 80) {
+					// long button press
+					button_pressed[i] = 2;
+					long_press(i);
+				}
 			}
 		} else { // is not pressed
 			if (button_pressed[i]) { // just depressed
 				uint16_t duration = jiffies - button_start[i];
+#if 1
 				log_byte(0xC1);
 				log_word(duration);
 				log_flush();
-				// led_set_number_pattern(N_PWMLEDS, 1 + (duration >> 3));
+#endif
 				button_pressed[i] = 0;
+				if (duration > 6 && duration < 30)
+					short_press(i);
 			}
 		}
-
-		break; // FIXME - delete this when btn1 is ready
 	}
 }
 
-- 
2.39.3