sporq/kmk_firmware
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add checksum to split uart code.

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This commit is contained in:
patrickmcquay 2022-01-31 15:03:10 -05:00 committed by Kyle Brown
parent 1387cb2660
commit aa01da7e1d
1 changed files with 12 additions and 2 deletions
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14
kmk/modules/split.py
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@ -282,6 +282,11 @@ class Split(Module):
keyboard.secondary_matrix_update = bytearray(self._uart_buffer.pop(0))
return
def _checksum(self, update):
checksum = bytes([sum(update) & 0xFF])
return checksum
def _send_uart(self, update):
# Change offsets depending on where the data is going to match the correct
# matrix location of the receiever
@ -293,6 +298,7 @@ class Split(Module):
if self._uart is not None:
self._uart.write(self.uart_header)
self._uart.write(update)
self._uart.write(self._checksum(update))
def _receive_uart(self, keyboard):
if self._uart is not None and self._uart.in_waiting > 0 or self._uart_buffer:
@ -302,10 +308,14 @@ class Split(Module):
microcontroller.reset()
while self._uart.in_waiting >= 4:
while self._uart.in_waiting >= 5:
# Check the header
if self._uart.read(1) == self.uart_header:
self._uart_buffer.append(self._uart.read(3))
update = self._uart.read(3)
# check the checksum
if self._checksum(update) == self._uart.read(1):
self._uart_buffer.append(update)
if self._uart_buffer:
keyboard.secondary_matrix_update = bytearray(self._uart_buffer.pop(0))