Add speaker indication after phase completion

Author: Peque

src/hmi.c

@@ -121,6 +121,17 @@ void speaker_warn_low_battery(void)
 	sleep_ticks(50);
 }
 
+/**
+ * @brief Play three fast, high tones to note a successful operation.
+ */
+void speaker_play_success(void)
+{
+	for (int i = 0; i < 3; i++) {
+		speaker_play('C', 8, 0, 0.05);
+		sleep_ticks(50);
+	}
+}
+
 /**
  * @brief Function to read button left.
  */

src/hmi.h

@@ -20,6 +20,7 @@ void led_bluepill_off(void);
 void repeat_blink(uint8_t count, uint16_t time);
 void blink_collision(void);
 void speaker_warn_low_battery(void);
+void speaker_play_success(void);
 bool button_left_read(void);
 bool button_right_read(void);
 bool button_left_read_consecutive(uint32_t count);

src/main.c

@@ -95,6 +95,7 @@ static void after_moving(void)
 		reset_motion();
 		blink_collision();
 	} else {
+		speaker_play_success();
 		repeat_blink(10, 100);
 	}
 	reset_motion();