adafruit_onewire.bus
Provide access to a 1-Wire bus.
Author(s): Carter Nelson
- class adafruit_onewire.bus.OneWireAddress(rom: bytearray)[source]
A class to represent a 1-Wire address.
- class adafruit_onewire.bus.OneWireBus(pin: Pin)[source]
A class to represent a 1-Wire bus.
- static crc8(data: array | bytearray | bytes | memoryview | rgbmatrix.RGBMatrix | ulab.numpy.ndarray) int [source]
Perform the 1-Wire CRC check on the provided data.
- Parameters:
data (ReadableBuffer) – 8 byte array representing 64 bit ROM code
- property maximum_devices: int
The maximum number of devices the bus will scan for. Valid range is 1 to 255. It is an error to have more devices on the bus than this number. Having less is OK.
- readinto(buf: array | bytearray | memoryview | rgbmatrix.RGBMatrix | ulab.numpy.ndarray, *, start: int = 0, end: int | None = None) None [source]
Read into
buf
from the device. The number of bytes read will be the length ofbuf
.If
start
orend
is provided, then the buffer will be sliced as ifbuf[start:end]
. This will not cause an allocation likebuf[start:end]
will so it saves memory.
- reset(required: bool = False) bool [source]
Perform a reset and check for presence pulse.
- Parameters:
required (bool) – require presence pulse
- scan() List[OneWireAddress] [source]
Scan for devices on the bus and return a list of addresses.
- write(buf: array | bytearray | bytes | memoryview | rgbmatrix.RGBMatrix | ulab.numpy.ndarray, *, start: int = 0, end: int | None = None) None [source]
Write the bytes from
buf
to the device.If
start
orend
is provided, then the buffer will be sliced as ifbuffer[start:end]
. This will not cause an allocation likebuffer[start:end]
will so it saves memory.
adafruit_onewire.device
Provides access to a single device on the 1-Wire bus.
Author(s): Carter Nelson
- class adafruit_onewire.device.OneWireDevice(bus: OneWireBus, address: OneWireAddress)[source]
A class to represent a single device on the 1-Wire bus.
- readinto(buf: array | bytearray | memoryview | rgbmatrix.RGBMatrix | ulab.numpy.ndarray, *, start: int = 0, end: int | None = None) None [source]
Read into
buf
from the device. The number of bytes read will be the length ofbuf
.If
start
orend
is provided, then the buffer will be sliced as ifbuf[start:end]
. This will not cause an allocation likebuf[start:end]
will so it saves memory.
- write(buf: array | bytearray | bytes | memoryview | rgbmatrix.RGBMatrix | ulab.numpy.ndarray, *, start: int = 0, end: int | None = None) None [source]
Write the bytes from
buf
to the device.If
start
orend
is provided, then the buffer will be sliced as ifbuffer[start:end]
. This will not cause an allocation likebuffer[start:end]
will so it saves memory.