Allow pin overrides on splits

docs/split_keyboards.md

@@ -9,7 +9,7 @@ to syncronize the halves allowing additional features in some extentions.
 from kb import data_pin
 :from kmk.modules.split import Split, SplitType
 
-split = Split(split_type=Split.UART, data_pin=data_pin, split_side=SplitSide.LEFT)
+split = Split(split_side=SplitSide.LEFT)
 keyboard.modules.append(split)
 ```
 
@@ -54,8 +54,10 @@ longer than 11 characters. Instructions on how to do that are
 [here](https://learn.adafruit.com/welcome-to-circuitpython/the-circuitpy-drive).
 For example on NYQUISTL for left and NYQUISTR for the right. 
 
-For wired connections you are done. For bluetooth, remove the `split_side` like this
+For wired connections you don't need to pass anything. For bluetooth, remove the `split_side` like this
 ```python
-split = Split(split_type=Split.UART, data_pin=data_pin)
+# Wired
+split = Split()
+# Wireless
 split = Split(split_type=Split.BLE)
 ```

kmk/modules/split.py

@@ -89,6 +89,10 @@ class Split(Module):
         name = str(getmount('/').label)
         if self.split_type == SplitType.BLE:
             self._ble.name = name
+        else:
+            # Try to guess data pins if not supplied
+            if not self.data_pin:
+                self.data_pin = keyboard.data_pin
 
         # Detect split side from name
         if self.split_side is None:

user_keymaps/kdb424/nyquist_r2.py

@@ -16,7 +16,7 @@ keyboard.tap_time = 150
 layers = Layers()
 modtap = ModTap()
 rgb_ext = RGB(pixel_pin=keyboard.rgb_pixel_pin, num_pixels=27, val_limit=100, hue_default=190, sat_default=100, val_default=5)
-split = Split(data_pin=keyboard.data_pin)
+split = Split()
 
 keyboard.modules = [modtap, layers, split]
 keyboard.extensions = [rgb_ext]