X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?a=blobdiff_plain;f=firmware%2Fbuttons.c;h=0742f927fb668a17d83d4ca3698e475f5f5a89f5;hb=fad6d0df251d09246816d5f6480543b8af588641;hp=17f4bffad9f70e671994e30582616adb309aaa23;hpb=ed608010c0a708b9be0d3577d7f4d3313eb2e851;p=bike-lights.git

diff --git a/firmware/buttons.c b/firmware/buttons.c
index 17f4bff..0742f92 100644
--- a/firmware/buttons.c
+++ b/firmware/buttons.c
@@ -5,9 +5,9 @@
 
 #include "lights.h"
 
+#define WAKEUP_LIMIT	5	// times 100 ms
 static uint16_t button_start[N_BUTTONS];
-static unsigned char button_pressed[N_BUTTONS];
-static unsigned char just_waked_up;
+static unsigned char prev_pin;
 
 static unsigned char user_params[MAX_USER_PARAMS] = { 0, 0, 0 };
 static unsigned char user_params_max[MAX_USER_PARAMS] = { 3, 2, 2 };
@@ -21,7 +21,29 @@ static unsigned char user_params_state = 0;
 
 static uint16_t user_params_starttime;
 
-static void do_sleep();
+static void inline set_status_led(unsigned char n, pattern_t *pattern)
+{
+	led_set_pattern(n + N_PWMLEDS, pattern);
+}
+
+pattern_t *status_pattern_select(unsigned char n)
+{
+	if (user_params_state) // Setup in progress
+		return number_pattern(n == 0
+			? user_params_state
+			: 1 + user_params[user_params_state-1]
+		);
+	else if (!(prev_pin & _BV(PA3)) || !(prev_pin & _BV(PA4)))
+		// at least one button is pressed
+		return off_pattern;
+	// otherwise, an ordinary state
+	if (n == 0) {
+		// error led
+		return number_pattern(1 + ambient_zone);
+	} else {
+		return jiffies > 500 ? number_pattern(2) : zero_pattern; // for now
+	}
+}
 
 static void toggle_bright_mode()
 {
@@ -58,7 +80,7 @@ static inline void short_press(unsigned char button)
 		if (user_params[param])
 			user_params[param]--;
 		else
-			user_params[param] = user_params_max[param];
+			user_params[param] = user_params_max[param]-1;
 	} else {
 		user_params[param]++;
 
@@ -67,7 +89,7 @@ static inline void short_press(unsigned char button)
 	}
 	// FIXME: notify somebody about user_params change?
 
-	// set_status_led(2, user_params[param]);
+	set_status_led(1, status_pattern_select(1));
 
 	user_params_starttime = jiffies;
 }
@@ -75,98 +97,115 @@ static inline void short_press(unsigned char button)
 static inline void long_press(unsigned char button)
 {
 	if (button == 0) {
-		do_sleep();
+		power_down();
 		return;
 	}
 
 	// button 1 - cycle through states
 	user_params_state++;
 
-	if (user_params_state >= MAX_USER_PARAMS)
+	if (user_params_state > MAX_USER_PARAMS)
 		user_params_state = 1;
 
-	// set_status_led(1, state);
+	set_status_led(0, status_pattern_select(0));
+	set_status_led(1, status_pattern_select(1));
 	user_params_starttime = jiffies;
 }
 
 void init_buttons()
 {
-	unsigned char i;
+	DDRA &= ~(_BV(PA3) | _BV(PA4)); // set as input
+	PORTA |=  _BV(PA3) | _BV(PA4);  // enable internal pull-ups
 
-	DDRA &= ~(_BV(PA3) | _BV(PA4));
-	PORTA |=  _BV(PA3) | _BV(PA4);
+	GIMSK &= ~(_BV(PCIE0) | _BV(PCIE1)); // disable pin-change IRQs
+	PCMSK0 = 0; // disable pin-change IRQs on all pins of port A
+	PCMSK1 = 0; // disable pin-change IRQs on all pins of port B
 
-	for (i=0; i < N_BUTTONS; i++) {
-		button_start[i] = 0;
-		button_pressed[i] = 0;
-	}
-
-	just_waked_up = 1;
+	button_start[0] = 0;
+	button_start[1] = 0;
+	prev_pin = _BV(PA3) | _BV(PA4);
+	user_params_state = 0;
 }
 
-static void do_sleep()
+void susp_buttons()
 {
-	log_byte(0xb0);
-	log_flush();
+	DDRA &= ~(_BV(PA3) | _BV(PA4)); // set as input
+	PORTA |=  _BV(PA3) | _BV(PA4);  // enable internal pull-ups
 
-	hw_suspend();
-	gpio_before_poweroff(); // Set the status LED on again
+	GIMSK &= ~_BV(PCIE1); // disable pin-change IRQ on port B
+	GIMSK |= _BV(PCIE0);
 
-	while((PINA & _BV(PA3)) == 0)
-		; // wait for button release
+	PCMSK0 = _BV(PCINT3) | _BV(PCINT4);
+		// disable pin-change IRQs on all pins except PA3,PA4
+	PCMSK1 = 0; // disable pin-change IRQs on all pins of port B
+}
 
-	_delay_ms(100);
+static void handle_button(unsigned char button, unsigned char cur,
+	unsigned char prev)
+{
+	// BEWARE: pins are at _zero_ when pressed!
+	if (!cur && prev) {                   // --- just pressed ---
+		button_start[button] = jiffies;
+		set_status_led(button, off_pattern);
 
-	susp_gpio(); // disable the status LED
+	} else if (!cur && !prev) {           // --- is still pressed ---
+		uint16_t duration = jiffies - button_start[button];
 
-	power_down();
+		if (duration > 80) {
+			set_status_led(button, on_pattern);
+				// acknowledge long press
+		}
+	} else if (cur && !prev) {            // --- just released ---
+		uint16_t duration = jiffies - button_start[button];
+
+		if (duration > 6 && duration < 30) {
+			short_press(button);
+		} else if (duration > 80) {
+			set_status_led(button, off_pattern);
+			long_press(button);
+		}
+		// ignore other button-press durations
+	}
 }
 
 void timer_check_buttons()
 {
-	unsigned char pin = PINA;
-	unsigned char i;
-	unsigned char port_states[N_BUTTONS] = {
-		pin & _BV(PA3),
-		pin & _BV(PA4),
-	};
-
-	for (i = 0; i < N_BUTTONS; i++) {
-		if (!port_states[i]) { // is pressed
-			if (i == 0 && just_waked_up)
-				continue;
-			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 (i == 0)
-				just_waked_up = 0;
-			if (button_pressed[i]) { // just depressed
-				uint16_t duration = jiffies - button_start[i];
-#if 1
-				log_byte(0xC1);
-				log_word(duration);
-				log_flush();
-#endif
-				button_pressed[i] = 0;
-				if (duration > 6 && duration < 30)
-					short_press(i);
-			}
-		}
+	unsigned char pin = PINA & (_BV(PA3) | _BV(PA4));
+
+	handle_button(0, pin & _BV(PA3), prev_pin & _BV(PA3));
+	handle_button(1, pin & _BV(PA4), prev_pin & _BV(PA4));
+
+	prev_pin = pin;
+
+	if (user_params_state && jiffies - user_params_starttime > 1000) {
+		user_params_state = 0;
+		set_status_led(0, status_pattern_select(0));
+		set_status_led(1, status_pattern_select(1));
 	}
 }
 
+unsigned char buttons_wait_for_release()
+{
+	uint16_t wake_count = 0;
+	unsigned char pin;
+
+	do {
+		if (wake_count++ > WAKEUP_LIMIT)
+			gpio_set(0, 1); // inform the user
+
+		_delay_ms(100);
+
+		pin = PINA & (_BV(PA3) | _BV(PA4));
+	} while (!(pin & _BV(PA3)) || !(pin & _BV(PA4)));
+
+	gpio_set(0, 0);
+
+	return wake_count > WAKEUP_LIMIT;
+
+}
+
+ISR(PCINT_vect)
+{
+	// empty - let it wake us from sleep, but do nothing else
+}
+