Merge pull request #995 from jedgarpark/master

first commit CPB Volume BLE, added .python-version to .gitignore

Author: dhalbert

.gitignore

@@ -3,3 +3,4 @@ Hue_Controller/secrets.h
 .idea
 *.DS_Store
 CircuitPython_Logger/secrets\.py
+.python-version

CPB_Volume_BLE/cpb_volume_ble.py

@@ -0,0 +1,137 @@
+"""
+A CircuitPython 'multimedia' dial demo
+Uses a Circuit Playground Bluefruit + Rotary Encoder -> BLE out
+Knob controls volume, push encoder for mute, CPB button A for Play/Pause
+Once paired, bonding will auto re-connect devices
+"""
+
+import time
+import digitalio
+import board
+import rotaryio
+import neopixel
+from adafruit_hid.consumer_control import ConsumerControl
+from adafruit_hid.consumer_control_code import ConsumerControlCode
+
+import adafruit_ble
+from adafruit_ble.advertising.standard import ProvideServicesAdvertisement
+from adafruit_ble.services.standard.hid import HIDService
+from adafruit_ble.services.standard.device_info import DeviceInfoService
+
+
+ble = adafruit_ble.BLERadio()
+ble.name = "Bluefruit-Volume-Control"
+# Using default HID Descriptor.
+hid = HIDService()
+device_info = DeviceInfoService(software_revision=adafruit_ble.__version__,
+                                manufacturer="Adafruit Industries")
+advertisement = ProvideServicesAdvertisement(hid)
+cc = ConsumerControl(hid.devices)
+
+FILL_COLOR = (0, 32, 32)
+UNMUTED_COLOR = (0, 128, 128)
+MUTED_COLOR = (128, 0, 0)
+DISCONNECTED_COLOR = (40, 40, 0)
+
+# NeoPixel LED ring
+# Ring code will auto-adjust if not 16 so change to any value!
+ring = neopixel.NeoPixel(board.NEOPIXEL, 10, brightness=0.05, auto_write = False)
+ring.fill(DISCONNECTED_COLOR)
+ring.show()
+dot_location = 0  # what dot is currently lit
+
+# CPB button for Play/Pause
+button_A = digitalio.DigitalInOut(board.BUTTON_A)
+button_A.switch_to_input(pull=digitalio.Pull.DOWN)
+
+button_a_pressed = False  # for debounce state
+
+# Encoder button is a digital input with pullup on A1
+# so button.value == False means pressed.
+button = digitalio.DigitalInOut(board.A1)
+button.pull = digitalio.Pull.UP
+
+encoder = rotaryio.IncrementalEncoder(board.A2, board.A3)
+
+last_pos = encoder.position
+muted = False
+command = None
+# Disconnect if already connected, so that we pair properly.
+if ble.connected:
+    for connection in ble.connections:
+        connection.disconnect()
+
+
+def draw():
+    if not muted:
+        ring.fill(FILL_COLOR)
+        ring[dot_location] = UNMUTED_COLOR
+    else:
+        ring.fill(MUTED_COLOR)
+    ring.show()
+
+
+advertising = False
+connection_made = False
+print("let's go!")
+while True:
+    if not ble.connected:
+        ring.fill(DISCONNECTED_COLOR)
+        ring.show()
+        connection_made = False
+        if not advertising:
+            ble.start_advertising(advertisement)
+            advertising = True
+        continue
+    else:
+        if connection_made:
+            pass
+        else:
+            ring.fill(FILL_COLOR)
+            ring.show()
+            connection_made = True
+
+    advertising = False
+
+    pos = encoder.position
+    delta = pos - last_pos
+    last_pos = pos
+    direction = 0
+
+    if delta > 0:
+        command = ConsumerControlCode.VOLUME_INCREMENT
+        direction = -1
+    elif delta < 0:
+        command = ConsumerControlCode.VOLUME_DECREMENT
+        direction = 1
+
+    if direction:
+        muted = False
+        for _ in range(abs(delta)):
+            cc.send(command)
+            # spin neopixel LED around in the correct direction!
+            dot_location = (dot_location + direction) % len(ring)
+            draw()
+
+    if not button.value:
+        if not muted:
+            print("Muting")
+            cc.send(ConsumerControlCode.MUTE)
+            muted = True
+        else:
+            print("Unmuting")
+            cc.send(ConsumerControlCode.MUTE)
+            muted = False
+        draw()
+        while not button.value:  # debounce
+            time.sleep(0.1)
+
+    if button_A.value and not button_a_pressed:  # button is pushed
+        cc.send(ConsumerControlCode.PLAY_PAUSE)
+        print("Play/Pause")
+        button_a_pressed = True  # state for debouncing
+        time.sleep(0.05)
+
+    if not button_A.value and button_a_pressed:
+        button_a_pressed = False
+        time.sleep(0.05)