112 lines
3.6 KiB
Python
112 lines
3.6 KiB
Python
import busio
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from kmk.extensions import Extension
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from kmk.matrix import intify_coordinate
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class SplitType:
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UART = 1
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I2C = 2 # unused
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ONEWIRE = 3 # unused
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class Split(Extension):
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def __init__(
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self,
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is_target=True,
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extra_data_pin=None,
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split_offsets=None,
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split_flip=True,
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split_side=None,
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split_type=SplitType.UART,
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target_left=True,
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uart_flip=True,
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uart_pin=None,
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uart_timeout=20,
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):
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self._is_target = is_target
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self.extra_data_pin = extra_data_pin
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self.split_offsets = split_offsets
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self.split_flip = split_flip
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self.split_side = split_side
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self.split_type = split_type
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self.split_target_left = target_left
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self._uart = None
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self._uart_buffer = []
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self.uart_flip = uart_flip
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self.uart_pin = uart_pin
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self.uart_timeout = uart_timeout
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def during_bootup(self, keyboard):
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try:
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# Working around https://github.com/adafruit/circuitpython/issues/1769
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# keyboard._hid_helper_inst.create_report([]).send()
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# Line above is broken and needs fixed for aut detection
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self._is_target = True
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except OSError:
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self._is_target = False
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if self.split_flip and not self._is_target:
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keyboard.col_pins = list(reversed(keyboard.col_pins))
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if self.split_side == 'Left':
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self.split_target_left = self._is_target
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elif self.split_side == 'Right':
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self.split_target_left = not self._is_target
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if self.uart_pin is not None:
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if self._is_target:
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self._uart = busio.UART(
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tx=None, rx=self.uart_pin, timeout=self.uart_timeout
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)
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else:
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self._uart = busio.UART(
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tx=self.uart_pin, rx=None, timeout=self.uart_timeout
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)
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# Attempt to sanely guess a coord_mapping if one is not provided.
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if not keyboard.coord_mapping:
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keyboard.coord_mapping = []
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rows_to_calc = len(keyboard.row_pins)
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cols_to_calc = len(keyboard.col_pins)
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if self.split_offsets:
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rows_to_calc *= 2
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cols_to_calc *= 2
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for ridx in range(rows_to_calc):
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for cidx in range(cols_to_calc):
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keyboard.coord_mapping.append(intify_coordinate(ridx, cidx))
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def before_matrix_scan(self, keyboard_state):
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if self._is_target:
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return self._receive_from_initiator()
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def after_matrix_scan(self, keyboard_state, matrix_update):
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if matrix_update is not None and not self._is_target:
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self._send_to_target(matrix_update)
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def _send_to_target(self, update):
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if self.split_target_left:
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update[1] += self.split_offsets[update[0]]
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else:
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update[1] -= self.split_offsets[update[0]]
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if self._uart is not None:
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self._uart.write(update)
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def _receive_from_initiator(self):
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if self._uart is not None and self._uart.in_waiting > 0 or self._uart_buffer:
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if self._uart.in_waiting >= 60:
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# This is a dirty hack to prevent crashes in unrealistic cases
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import microcontroller
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microcontroller.reset()
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while self._uart.in_waiting >= 3:
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self._uart_buffer.append(self._uart.read(3))
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if self._uart_buffer:
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update = bytearray(self._uart_buffer.pop(0))
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return update
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return None
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