fixup! Add a sleep() function with seconds duration

Author: Peque

src/clock.c

@@ -56,7 +56,7 @@ void sleep_ticks(uint32_t ticks)
  *
  * @param[in] seconds Sleep duration, in seconds.
  */
-void sleep(float seconds)
+void sleep_seconds(float seconds)
 {
 	sleep_ticks((uint32_t)(seconds * SYSTICK_FREQUENCY_HZ));
 }

src/clock.h

@@ -11,7 +11,7 @@ void each(uint32_t period, void (*function)(void), uint32_t during);
 uint32_t get_clock_ticks(void);
 uint32_t read_cycle_counter(void);
 void sleep_ticks(uint32_t ticks);
-void sleep(float seconds);
+void sleep_seconds(float seconds);
 void stopwatch_start(void);
 float stopwatch_stop(void);
 void sleep_us(uint32_t us);

src/speaker.c

@@ -75,7 +75,7 @@ void speaker_play(char note, uint8_t octave, int8_t accidental, float duration)
 	setup_speaker();
 	speaker_set_frequency(frequency);
 	speaker_on();
-	sleep(duration);
+	sleep_seconds(duration);
 	speaker_off();
 	setup_emitters();
 }