Merge pull request #154 from ekx/topic-ble

Basic BLE functionality

kmk/ble.py

@@ -0,0 +1,64 @@
+from adafruit_ble import BLERadio
+from adafruit_ble.advertising import Advertisement
+from adafruit_ble.advertising.standard import ProvideServicesAdvertisement
+from adafruit_ble.services.standard.hid import HIDService
+from kmk.hid import (
+    HID_REPORT_SIZES,
+    AbstractHID,
+    HIDReportTypes,
+    HIDUsage,
+    HIDUsagePage,
+)
+
+BLE_APPEARANCE_HID_KEYBOARD = 961
+
+
+class BLEHID(AbstractHID):
+    def post_init(self):
+        self.devices = {}
+
+        hid = HIDService()
+
+        advertisement = ProvideServicesAdvertisement(hid)
+        advertisement.appearance = BLE_APPEARANCE_HID_KEYBOARD
+        scan_response = Advertisement()
+        scan_response.complete_name = 'KMK Keyboard'
+
+        ble = BLERadio()
+        if not ble.connected:
+            ble.start_advertising(advertisement, scan_response)
+            while not ble.connected:
+                pass
+
+        for device in hid.devices:
+            us = device.usage
+            up = device.usage_page
+
+            if up == HIDUsagePage.CONSUMER and us == HIDUsage.CONSUMER:
+                self.devices[HIDReportTypes.CONSUMER] = device
+                continue
+
+            if up == HIDUsagePage.KEYBOARD and us == HIDUsage.KEYBOARD:
+                self.devices[HIDReportTypes.KEYBOARD] = device
+                continue
+
+            if up == HIDUsagePage.MOUSE and us == HIDUsage.MOUSE:
+                self.devices[HIDReportTypes.MOUSE] = device
+                continue
+
+            if up == HIDUsagePage.SYSCONTROL and us == HIDUsage.SYSCONTROL:
+                self.devices[HIDReportTypes.SYSCONTROL] = device
+                continue
+
+    def hid_send(self, evt):
+        # int, can be looked up in HIDReportTypes
+        reporting_device_const = self.report_device[0]
+
+        report_size = HID_REPORT_SIZES[reporting_device_const]
+
+        while len(evt) < report_size + 1:
+            evt.append(0)
+
+        return self.devices[reporting_device_const].send_report(
+            evt[1 : report_size + 1]
+        )

kmk/hid.py

@@ -221,10 +221,3 @@ class USBHID(AbstractHID):
         return self.devices[reporting_device_const].send_report(
             evt[1 : HID_REPORT_SIZES[reporting_device_const] + 1]
         )
-
-
-class BLEHID(AbstractHID):
-    def __init__(self, *args, **kwargs):
-        raise NotImplementedError(
-            'BLE HID is not supported by upstream CircuitPython yet'
-        )

kmk/kmk_keyboard.py

@@ -7,8 +7,9 @@ import busio
 import gc
 
 from kmk import led, rgb
+from kmk.ble import BLEHID
 from kmk.consts import KMK_RELEASE, LeaderMode, UnicodeMode
-from kmk.hid import BLEHID, USBHID, AbstractHID, HIDModes
+from kmk.hid import USBHID, AbstractHID, HIDModes
 from kmk.internal_state import InternalState
 from kmk.keys import KC
 from kmk.kmktime import sleep_ms