first code.py run.
"""
self._dc = digitalio.DigitalInOut(command)
- self._dc.switch_to_output()
+ self._dc.switch_to_output(value=False)
self._chip_select = digitalio.DigitalInOut(chip_select)
self._chip_select.switch_to_output(value=True)
+ self._frequency = baudrate
+ self._polarity = polarity
+ self._phase = phase
if reset is not None:
self._reset = digitalio.DigitalInOut(reset)
else:
self._reset = None
self._spi = spi_bus
- while self._spi.try_lock():
- pass
- self._spi.configure(baudrate=baudrate, polarity=polarity, phase=phase)
- self._spi.unlock()
def _release(self):
self.reset()
such as vertical scroll, set via ``send`` may or may not be reset once the code is
done.
"""
- while self._spi.try_lock():
- pass
self._dc.value = not is_command
if toggle_every_byte:
for byte in data:
self._chip_select.value = False
else:
self._spi.write(data)
+
+ def begin_transaction(self):
+ """Begin the SPI transaction by locking, configuring, and setting Chip Select
+ """
+ if not self._spi.try_lock():
+ return False
+ self._spi.configure(
+ baudrate=self._frequency, polarity=self._polarity, phase=self._phase
+ )
+ self._chip_select.value = False
+ return True
+
+ def end_transaction(self):
+ """End the SPI transaction by unlocking and setting Chip Select
+ """
+ self._chip_select.value = True
self._spi.unlock()