Make buzzer global

stechuhr_client/client.py

@@ -107,6 +107,7 @@ LEDS = neopixel_spi.NeoPixel_SPI(board.SPI(), 10)
 
 buzzer_pin = 18
 GPIO.setup(buzzer_pin, GPIO.OUT)
+BUZZER = GPIO.PWM(buzzer_pin, 440) # Set frequency to 1 Khz
 
 # from input-event-codes.h
 # type can be EV_SYN, EV_KEY or EV_MSC
@@ -180,31 +181,29 @@ def dispatch_buzzer(state, config):
     buzzer_thread.start()
 
 def set_buzzer(state, config):
-    global buzzer_pin
-    buzzer = GPIO.PWM(buzzer_pin, f) # Set frequency to 1 Khz
+    global BUZZER
 
     state = str(state).strip().lower()
     if state in ["startup", "ready"]:
-        buzzer = GPIO.PWM(buzzer_pin, f) # Set frequency to 1 Khz
         for i, note in enumerate(config["buzzer"]["startup_notes"]):
-            buzzer.ChangeFrequency(midinumber_to_hertz(note))  # Set frequency to 1 Khz
-            buzzer.start(50) # Set dutycycle to 10
+            BUZZER.ChangeFrequency(midinumber_to_hertz(note))  # Set frequency to 1 Khz
+            BUZZER.start(50) # Set dutycycle to 10
             time.sleep(repeat(config["buzzer"]["startup_note_lengths"], i))
-            buzzer.stop()
+            BUZZER.stop()
             time.sleep(repeat(config["buzzer"]["startup_note_stop_lengths"], i))
     elif state in ["success"]:
         for i, note in enumerate(config["buzzer"]["success_notes"]):
-            buzzer.ChangeFrequency(midinumber_to_hertz(note))  # Set frequency to 1 Khz
-            buzzer.start(50) # Set dutycycle to 10
+            BUZZER.ChangeFrequency(midinumber_to_hertz(note))  # Set frequency to 1 Khz
+            BUZZER.start(50) # Set dutycycle to 10
             time.sleep(repeat(config["buzzer"]["success_note_lengths"], i))
-            buzzer.stop()
+            BUZZER.stop()
             time.sleep(repeat(config["buzzer"]["success_note_stop_lengths"], i))
     elif state in ["failure"]:
         for i, note in enumerate(config["buzzer"]["failure_notes"]):
-            buzzer.ChangeFrequency(midinumber_to_hertz(note))  # Set frequency to 1 Khz
-            buzzer.start(50) # Set dutycycle to 10
+            BUZZER.ChangeFrequency(midinumber_to_hertz(note))  # Set frequency to 1 Khz
+            BUZZER.start(50) # Set dutycycle to 10
             time.sleep(repeat(config["buzzer"]["failure_note_lengths"], i))
-            buzzer.stop()
+            BUZZER.stop()
             time.sleep(repeat(config["buzzer"]["failure_note_stop_lengths"], i))