Complete the countdown state machine

doc/sseg_codes.txt

@@ -5,6 +5,10 @@ A: 11101110   0111 0111    0x77
 M: 11101100   0111 0110    0x76
 O: 11111100   0111 1110    0x7E
 F: 10001110   0001 0111    0x47
+#: 01101100   0110 0110    0x66      note: two vertical lines only
+|: 00001100   0000 0110    0x06
+d: 01111010   0110 1101    0x6D
+H: 01101110   0110 0111    0x67
 
 0: 11111100   0111 1110    0x7E
 1: 01100000   0110 0000    0x60

src/main.c

@@ -11,10 +11,16 @@
 typedef enum {
 	COUNTDOWN_UNINITIALIZED,
 	COUNTDOWN_STOPPED,
+	COUNTDOWN_STOPPING,
 	COUNTDOWN_STARTING,
 	COUNTDOWN_RUNNING
 } countdown_state_t;
 
+static const uint32_t ONE_DAY = 86400 * 1000;
+static const uint32_t ONE_HOUR = 3600 * 1000;
+static const uint32_t ONE_MINUTE = 60 * 1000;
+static const uint32_t ONE_SECOND = 1000;
+
 static countdown_state_t m_countdown_state;
 static uint32_t          m_last_state_change_time;
 
@@ -53,6 +59,53 @@ static void configure_ms_trig_alarm(void)
 	m_next_ms_trigger = timer_hw->timelr + 10000;
 }
 
+static void show_time(uint32_t time_ms)
+{
+	bool blinking_dot_on = (time_ms % 1000) < 500;
+
+	if(time_ms >= 100 * ONE_DAY) { // more than 100 days
+		// time too large to display
+		sseg_set_char(0, 'i', false);
+		sseg_set_char(1, 'n', false);
+		sseg_set_char(2, 'f', false);
+	} else if(time_ms >= 10 * ONE_DAY) { // 10 .. 100 days
+		// show days without decimal
+		uint32_t days = (time_ms + ONE_DAY/2) / ONE_DAY;
+
+		sseg_set_char(0, '0' + days / 10, false);
+		sseg_set_char(1, '0' + days % 10, blinking_dot_on);
+		sseg_set_char(2, 'd', false);
+	} else if(time_ms >= 10 * ONE_HOUR) { // 10 hours .. 10 days
+		// show days with one decimal
+		uint32_t decidays = (time_ms + ONE_DAY/20) * 10 / ONE_DAY;
+
+		sseg_set_char(0, '0' + decidays / 10, blinking_dot_on);
+		sseg_set_char(1, '0' + decidays % 10, false);
+		sseg_set_char(2, 'd', false);
+	} else if(time_ms >= 1000 * ONE_SECOND) { // 1000 seconds (0.27 hours) .. 10 hours
+		// show hours with one decimal
+		uint32_t decihours = (time_ms + ONE_HOUR/20) * 10 / ONE_HOUR;
+
+		sseg_set_char(0, '0' + decihours / 10, blinking_dot_on);
+		sseg_set_char(1, '0' + decihours % 10, false);
+		sseg_set_char(2, 'H', false);
+	} else if(time_ms >= 100 * ONE_SECOND) { // 100 .. 1000 seconds
+		// show seconds
+		uint32_t seconds = (time_ms + ONE_SECOND/2) / ONE_SECOND;
+
+		sseg_set_char(0, '0' + seconds / 100, false);
+		sseg_set_char(1, '0' + (seconds / 10) % 10, false);
+		sseg_set_char(2, '0' + seconds % 10, true);
+	} else { // <100 seconds
+		// show seconds with one decimal
+		uint32_t deciseconds = time_ms * 10 / ONE_SECOND;
+
+		sseg_set_char(0, '0' + deciseconds / 100, false);
+		sseg_set_char(1, '0' + (deciseconds / 10) % 10, true);
+		sseg_set_char(2, '0' + deciseconds % 10, false);
+	}
+}
+
 static void update_countdown_fsm(uint32_t time_ms)
 {
 	countdown_state_t last_state = m_countdown_state;
@@ -70,6 +123,9 @@ static void update_countdown_fsm(uint32_t time_ms)
 
 		case COUNTDOWN_STOPPED:
 			if(state_entered) {
+				// countdown has been stopped -> switch off the load
+				gpio_put(OUTPUT_ENABLE_PIN, true);
+
 				sseg_set_char(0, 'o', false);
 				sseg_set_char(1, 'f', false);
 				sseg_set_char(2, 'f', false);
@@ -81,16 +137,62 @@ static void update_countdown_fsm(uint32_t time_ms)
 			break;
 
 		case COUNTDOWN_STARTING:
-			// TODO: show a fancy animation + beep code
-
 			if(buttons_get_events(BTN_ON) & BTN_EVENT_RELEASED) {
 				// button released too early -> back to stopped state
 				m_countdown_state = COUNTDOWN_STOPPED;
 			}
 
-			if(time_in_state == 3000) {
+			switch(time_in_state) {
-				m_countdown_off_time = time_ms + 30 * 60 * 1000;
+				case 1:
+					sseg_set_char(0, '|', false);
+					sseg_set_char(1, ' ', false);
+					sseg_set_char(2, ' ', false);
+					break;
+
+				case 500:
+					sseg_set_char(0, '#', false);
+					buzzer_on(1000);
+					break;
+
+				case 1000:
+					sseg_set_char(1, '|', false);
+					buzzer_on(1414);
+					break;
+
+				case 1500:
+					sseg_set_char(1, '#', false);
+					buzzer_on(2000);
+					break;
+
+				case 2000:
+					sseg_set_char(2, '|', false);
+					buzzer_on(2828);
+					break;
+
+				case 2500:
+					sseg_set_char(2, '#', false);
+					buzzer_on(4000);
+					break;
+
+				case 700:
+				case 1200:
+				case 1700:
+				case 2200:
+				case 2700:
+					buzzer_off();
+					break;
+
+				case 3000:
+					if(buttons_is_pressed(BTN_OFF)) {
+						// „permanent on mode“
+						m_countdown_off_time = time_ms + 14 * ONE_DAY;
+					} else {
+						// default mode
+						m_countdown_off_time = time_ms + 30 * ONE_MINUTE;
+					}
+
 					m_countdown_state = COUNTDOWN_RUNNING;
+					break;
 			}
 			break;
 
@@ -102,9 +204,19 @@ static void update_countdown_fsm(uint32_t time_ms)
 
 			countdown_time_remaining = m_countdown_off_time - time_ms;
 
-			// TODO: show time on display
+			show_time(countdown_time_remaining);
-			// TODO: off button handling
+
-			// TODO: on button handling (extend time)
+			// off button pressed -> go to stop procedure
+			if(buttons_get_events(BTN_ON) & BTN_EVENT_PRESSED) {
+				m_countdown_state = COUNTDOWN_STOPPING;
+			}
+
+			// extend time when on button is pressed again
+			if(buttons_get_events(BTN_ON) & BTN_EVENT_PRESSED) {
+				if(countdown_time_remaining < 10 * ONE_HOUR) {
+					m_countdown_off_time += 30 * ONE_MINUTE;
+				}
+			}
 
 			// beep codes
 			switch(countdown_time_remaining) {
@@ -142,6 +254,65 @@ static void update_countdown_fsm(uint32_t time_ms)
 				gpio_put(OUTPUT_ENABLE_PIN, false);
 				m_countdown_state = COUNTDOWN_STOPPED;
 			}
+			break;
+
+		case COUNTDOWN_STOPPING:
+			if(state_entered) {
+				buzzer_off();
+			}
+
+			if(buttons_get_events(BTN_OFF) & BTN_EVENT_RELEASED) {
+				// button released too early -> back to running state
+				m_countdown_state = COUNTDOWN_RUNNING;
+				// add the time that the button was pressed to the deadline
+				m_countdown_off_time += time_in_state;
+			}
+
+			switch(time_in_state) {
+				case 1:
+					sseg_set_char(0, '#', false);
+					sseg_set_char(1, '#', false);
+					sseg_set_char(2, '#', false);
+					break;
+
+				case 500:
+					sseg_set_char(0, '|', false);
+					buzzer_on(4000);
+					break;
+
+				case 1000:
+					sseg_set_char(0, ' ', false);
+					buzzer_on(2828);
+					break;
+
+				case 1500:
+					sseg_set_char(1, '|', false);
+					buzzer_on(2000);
+					break;
+
+				case 2000:
+					sseg_set_char(1, ' ', false);
+					buzzer_on(1414);
+					break;
+
+				case 2500:
+					sseg_set_char(2, '|', false);
+					buzzer_on(1000);
+					break;
+
+				case 700:
+				case 1200:
+				case 1700:
+				case 2200:
+				case 2700:
+					buzzer_off();
+					break;
+
+				case 3000:
+					m_countdown_state = COUNTDOWN_STOPPED;
+					break;
+			}
+			break;
 	}
 
 	if(m_countdown_state != last_state) {

src/sseg.c

@@ -83,6 +83,25 @@ static uint8_t ascii_to_sseg(char c)
 		case 'F':
 			return 0x47;
 
+		case '#':
+			return 0x66;
+
+		case 'i':
+		case 'I':
+		case '|':
+			return 0x06;
+
+		case 'd':
+		case 'D':
+			return 0x6D;
+
+		case 'h':
+		case 'H':
+			return 0x67;
+
+		case ' ':
+			return 0x00;
+
 		default: // '-'
 			return 0x01;
 	}