from adafruit_blinka import Enum, Lockable, agnostic
+class I2C(Lockable):
+ def __init__(self, scl, sda, frequency=400000):
+ self.init(scl, sda, frequency)
+
+ def init(self, scl, sda, frequency):
+ self.deinit()
+ from machine import I2C as _I2C
+ from microcontroller.pin import i2cPorts
+ for portId, portScl, portSda in i2cPorts:
+ if scl == portScl and sda == portSda:
+ self._i2c = I2C(portId, mode=_I2C.MASTER, baudrate=frequency)
+ break
+ else:
+ raise NotImplementedError("No Hardware I2C on (scl,sda)={}\nValid UART ports".format(
+ (scl, sda), i2cPorts))
+
+ def deinit(self):
+ try:
+ del self._i2c
+ except AttributeError:
+ pass
+
+ def __enter__(self):
+ return self
+
+ def __exit__(self, exc_type, exc_value, traceback):
+ self.deinit()
+
+ def scan(self):
+ return self._i2c.scan()
+
+ def readfrom_into(self, address, buffer, start=0, end=None):
+ if start is not 0 or end is not None:
+ if end is None:
+ end = len(buffer)
+ buffer = memoryview(buffer)[start:end]
+ stop = True # remove for efficiency later
+ return self._i2c.readfrom_into(address, buffer, stop)
+
+ def writeto(self, address, buffer, start=0, end=None, stop=True):
+ if start is not 0 or end is not None:
+ if end is None:
+ return self._i2c.writeto(address, memoryview(buffer)[start:], stop)
+ else:
+ return self._i2c.writeto(address, memoryview(buffer)[start:end], stop)
+ return self._i2c.writeto(address, buffer, stop)
+
class SPI(Lockable):
def __init__(self, clock, MOSI=None, MISO=None):
- from microcontroller import spiPorts
- for spiId, sck, mosi, miso in spiPorts:
- if sck == clock.id and mosi == MOSI.id and miso == MISO.id:
- self._spi = SPI(spiId)
- self._pinIds = (sck, mosi, miso)
+ from microcontroller.pin import spiPorts
+ for portId, portSck, portMosi, portMiso in spiPorts:
+ if clock == portSck and MOSI == portMosi and MISO == portMiso:
+ self._spi = SPI(portId)
+ self._pins = (portSck, portMosi, portMiso)
break
else:
- raise NotImplementedError("No Hardware SPI on (clock, MOSI, MISO)={}\nValid SPI ports:{}".format((clock, MOSI, MISO), spiPorts))
+ raise NotImplementedError(
+ "No Hardware SPI on (clock, MOSI, MISO)={}\nValid SPI ports:{}".
+ format((clock, MOSI, MISO), spiPorts))
def configure(self, baudrate=100000, polarity=0, phase=0, bits=8):
if self._locked:
from machine import Pin
- from microcontroller import spiPorts
# TODO check if #init ignores MOSI=None rather than unsetting, to save _pinIds attribute
- self._spi.init(baudrate=baudrate, polarity=polarity, phase=phase, bits = bits, firstbit = SPI.MSB, sck = Pin(self._pinIds[0]), mosi=Pin(self._pinIds[1]), miso=Pin(self._pinIds[2]))
+ self._spi.init(
+ baudrate=baudrate,
+ polarity=polarity,
+ phase=phase,
+ bits=bits,
+ firstbit=SPI.MSB,
+ sck=Pin(self._pins[0].id),
+ mosi=Pin(self._pins[1].id),
+ miso=Pin(self._pins[2].id)
+ )
else:
raise RuntimeError("First call try_lock()")
def write_readinto(self, buffer_out, buffer_in):
return self.write_readinto(buffer_out, buffer_in)
-class UART(Lockable):
+class UART(Lockable):
class Parity(Enum):
pass
- Parity.ODD=Parity()
- Parity.EVEN=Parity()
+
+ Parity.ODD = Parity()
+ Parity.EVEN = Parity()
# TODO investigate UART receiver_buffer_size as e.g. read_buf_len in https://github.com/micropython/micropython/blob/3eb0694b97c6a8f0e93b874549aac40d8b78b0e5/ports/stm32/uart.c
- def __init__(self, tx, rx, baudrate=9600, bits=8, parity=None, stop=1, timeout=None, receiver_buffer_size=None, flow=None):
- from microcontroller import uartPorts
- from machine import UART
+ def __init__(self,
+ tx,
+ rx,
+ baudrate=9600,
+ bits=8,
+ parity=None,
+ stop=1,
+ timeout=1000,
+ receiver_buffer_size=64,
+ flow=None):
+ from machine import UART as _UART
+ from microcontroller.pin import uartPorts
self.baudrate = baudrate
- if timeout is not None: # default 1000
- raise NotImplementedError("Parameter '{}' unsupported on {}".format("timeout", agnostic.board))
- if receiver_buffer_size is not None: # default 64
- raise NotImplementedError("Parameter '{}' unsupported on {}".format("receiver_buffer_size", agnostic.board))
- if flow is not None: # default 0
- raise NotImplementedError("Parameter '{}' unsupported on {}".format("flow", agnostic.board))
+ if flow is not None: # default 0
+ raise NotImplementedError(
+ "Parameter '{}' unsupported on {}".format(
+ "flow", agnostic.board))
# translate parity flag for Micropython
if parity is UART.Parity.ODD:
raise ValueError("Invalid parity")
# check tx and rx have hardware support
- for portId, portTx, portRx in uartPorts:#
- if portTx == tx.id and portRx == rx.id:
- self._uart = UART(portId, baudrate, bits=bits, parity=parity, stop=stop, timeout=timeout)
+ for portId, portTx, portRx in uartPorts: #
+ if portTx == tx and portRx == rx:
+ self._uart = _UART(
+ portId,
+ baudrate,
+ bits=bits,
+ parity=parity,
+ stop=stop,
+ timeout=timeout,
+ read_buf_len=receiver_buffer_size
+ )
break
else:
- raise NotImplementedError("No Hardware UART on (tx,rx)={}\nValid UART ports".format((tx, rx), uartPorts))
+ raise NotImplementedError(
+ "No Hardware UART on (tx,rx)={}\nValid UART ports".format(
+ (tx, rx), uartPorts))
def deinit(self):
self._uart = None
projects / Adafruit_Blinka-hackapet.git / blobdiff