fix timer conflict between encoder and audio (#145)

Author: alustig3

source/pyControl/audio.py

@@ -36,21 +36,21 @@ def __init__(self, channel=1):
     # User functions
 
     def off(self):
-        self._DAC.write_timed(_off_buf, pyb.Timer(2, freq=10000), mode=pyb.DAC.NORMAL)
+        self._DAC.write_timed(_off_buf, pyb.Timer(4, freq=10000), mode=pyb.DAC.NORMAL)
         self._timer.deinit()
         self._playing = False
 
     def sine(self, freq):  # Play a sine wave tone at the specified frequency.
-        self._DAC.write_timed(_sine_buf, pyb.Timer(2, freq=freq * _sine_len), mode=pyb.DAC.CIRCULAR)
+        self._DAC.write_timed(_sine_buf, pyb.Timer(4, freq=freq * _sine_len), mode=pyb.DAC.CIRCULAR)
 
     def square(self, freq):  # Play a square wave tone at the specified frequency.
-        self._DAC.write_timed(_sqr_buf, pyb.Timer(2, freq=freq * 2), mode=pyb.DAC.CIRCULAR)
+        self._DAC.write_timed(_sqr_buf, pyb.Timer(4, freq=freq * 2), mode=pyb.DAC.CIRCULAR)
 
     def noise(self, freq=10000):  # Play white noise with specified maximum frequency.
         self._DAC.noise(freq * 2)
 
     def click(self, timer=None):  # Play a single click.
-        self._DAC.write_timed(_click_buf, pyb.Timer(2, freq=40000), mode=pyb.DAC.NORMAL)
+        self._DAC.write_timed(_click_buf, pyb.Timer(4, freq=40000), mode=pyb.DAC.NORMAL)
 
     def clicks(self, rate):  # Play clicks at specified rate.
         self._timer.init(freq=rate)

source/pyControl/hardware.py

@@ -43,8 +43,8 @@ def get(self) -> int:
 
 IO_dict = {}  # Dictionary {ID: IO_object} containing all hardware inputs and outputs.
 
-available_timers = [3, 4, 5, 7, 8, 9, 10, 11, 12, 13, 14]  # Hardware timers not in use
-# Used timers; 1: Framework clock tick, 2: Audio write_timed, 6: DAC write_timed.
+available_timers = [3, 5, 7, 8, 9, 10, 11, 12, 13, 14]  # Hardware timers not in use.
+# Used timers; 1: Framework clock tick, 2: Rotary encoder, 4: Audio write_timed, 6: DAC write_timed.
 
 initialised = False  # Set to True once hardware has been intiialised.