+"""
+`busio` - Bus protocol support like I2C and SPI
+=================================================
+
+See `CircuitPython:busio` in CircuitPython for more details.
+
+* Author(s): cefn
+"""
+
+import threading
+
from adafruit_blinka import Enum, Lockable, agnostic
+from adafruit_blinka.agnostic import board_id, detector
+import adafruit_platformdetect.constants.boards as ap_board
+import adafruit_platformdetect.constants.chips as ap_chip
+
+# pylint: disable=import-outside-toplevel,too-many-branches,too-many-statements
+# pylint: disable=too-many-arguments,too-many-function-args
+
+
+class I2C(Lockable):
+ """
+ Busio I2C Class for CircuitPython Compatibility. Used
+ for both MicroPython and Linux.
+ """
+
+ def __init__(self, scl, sda, frequency=400000):
+ self.init(scl, sda, frequency)
+
+ def init(self, scl, sda, frequency):
+ """Initialization"""
+ self.deinit()
+ if detector.board.ftdi_ft232h:
+ from adafruit_blinka.microcontroller.ft232h.i2c import I2C as _I2C
+
+ self._i2c = _I2C(frequency=frequency)
+ return
+ if detector.board.binho_nova:
+ from adafruit_blinka.microcontroller.nova.i2c import I2C as _I2C
+
+ self._i2c = _I2C(frequency=frequency)
+ return
+ if detector.board.microchip_mcp2221:
+ from adafruit_blinka.microcontroller.mcp2221.i2c import I2C as _I2C
+
+ self._i2c = _I2C(frequency=frequency)
+ return
+ if detector.board.greatfet_one:
+ from adafruit_blinka.microcontroller.nxp_lpc4330.i2c import I2C as _I2C
+
+ self._i2c = _I2C(frequency=frequency)
+ return
+ if detector.board.any_embedded_linux:
+ from adafruit_blinka.microcontroller.generic_linux.i2c import I2C as _I2C
+ else:
+ from machine import I2C as _I2C
+ from microcontroller.pin import i2cPorts
+
+ for portId, portScl, portSda in i2cPorts:
+ try:
+ if scl == portScl and sda == portSda:
+ self._i2c = _I2C(portId, mode=_I2C.MASTER, baudrate=frequency)
+ break
+ except RuntimeError:
+ pass
+ else:
+ raise ValueError(
+ "No Hardware I2C on (scl,sda)={}\nValid I2C ports: {}".format(
+ (scl, sda), i2cPorts
+ )
+ )
+
+ self._lock = threading.RLock()
+
+ def deinit(self):
+ """Deinitialization"""
+ try:
+ del self._i2c
+ except AttributeError:
+ pass
+
+ def __enter__(self):
+ self._lock.acquire()
+ return self
+
+ def __exit__(self, exc_type, exc_value, traceback):
+ self._lock.release()
+ self.deinit()
+
+ def scan(self):
+ """Scan for attached devices"""
+ return self._i2c.scan()
+
+ def readfrom_into(self, address, buffer, *, start=0, end=None):
+ """Read from a device at specified address into a buffer"""
+ if start != 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=stop)
+
+ def writeto(self, address, buffer, *, start=0, end=None, stop=True):
+ """Write to a device at specified address from a buffer"""
+ if isinstance(buffer, str):
+ buffer = bytes([ord(x) for x in buffer])
+ if start != 0 or end is not None:
+ if end is None:
+ return self._i2c.writeto(address, memoryview(buffer)[start:], stop=stop)
+ return self._i2c.writeto(address, memoryview(buffer)[start:end], stop=stop)
+ return self._i2c.writeto(address, buffer, stop=stop)
+
+ def writeto_then_readfrom(
+ self,
+ address,
+ buffer_out,
+ buffer_in,
+ *,
+ out_start=0,
+ out_end=None,
+ in_start=0,
+ in_end=None,
+ stop=False
+ ):
+ """"Write to a device at specified address from a buffer then read
+ from a device at specified address into a buffer
+ """
+ return self._i2c.writeto_then_readfrom(
+ address,
+ buffer_out,
+ buffer_in,
+ out_start=out_start,
+ out_end=out_end,
+ in_start=in_start,
+ in_end=in_end,
+ stop=stop,
+ )
class SPI(Lockable):
+ """
+ Busio SPI Class for CircuitPython Compatibility. Used
+ for both MicroPython and Linux.
+ """
+
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)
+ self.deinit()
+ if detector.board.ftdi_ft232h:
+ from adafruit_blinka.microcontroller.ft232h.spi import SPI as _SPI
+ from adafruit_blinka.microcontroller.ft232h.pin import SCK, MOSI, MISO
+
+ self._spi = _SPI()
+ self._pins = (SCK, MOSI, MISO)
+ return
+ if detector.board.binho_nova:
+ from adafruit_blinka.microcontroller.nova.spi import SPI as _SPI
+ from adafruit_blinka.microcontroller.nova.pin import SCK, MOSI, MISO
+
+ self._spi = _SPI(clock)
+ self._pins = (SCK, MOSI, MISO)
+ return
+ if detector.board.greatfet_one:
+ from adafruit_blinka.microcontroller.nxp_lpc4330.spi import SPI as _SPI
+ from adafruit_blinka.microcontroller.nxp_lpc4330.pin import SCK, MOSI, MISO
+
+ self._spi = _SPI()
+ self._pins = (SCK, MOSI, MISO)
+ return
+ if detector.board.any_embedded_linux:
+ from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
+ else:
+ from machine import SPI as _SPI
+ from microcontroller.pin import spiPorts
+
+ for portId, portSck, portMosi, portMiso in spiPorts:
+ if (
+ (clock == portSck)
+ and MOSI in (portMosi, None) # Clock is required!
+ and MISO in (portMiso, None) # But can do with just output
+ ): # Or just input
+ 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 ValueError(
+ "No Hardware SPI on (SCLK, MOSI, MISO)={}\nValid SPI ports:{}".format(
+ (clock, MOSI, MISO), spiPorts
+ )
+ )
def configure(self, baudrate=100000, polarity=0, phase=0, bits=8):
- if self._locked:
+ """Update the configuration"""
+ if detector.board.any_raspberry_pi or detector.board.any_raspberry_pi_40_pin:
+ from adafruit_blinka.microcontroller.bcm283x.pin import Pin
+ from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
+ elif detector.board.any_beaglebone:
+ from adafruit_blinka.microcontroller.am335x.pin import Pin
+ from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
+ elif detector.board.any_orange_pi and detector.chip.id == ap_chip.SUN8I:
+ from adafruit_blinka.microcontroller.allwinner.h3.pin import Pin
+ from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
+ elif board_id == ap_board.GIANT_BOARD:
+ from adafruit_blinka.microcontroller.sama5.pin import Pin
+ from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
+ elif board_id == ap_board.CORAL_EDGE_TPU_DEV:
+ from adafruit_blinka.microcontroller.nxp_imx8m.pin import Pin
+ from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
+ elif board_id == ap_board.ODROID_C2:
+ from adafruit_blinka.microcontroller.amlogic.s905.pin import Pin
+ from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
+ elif board_id == ap_board.ODROID_C4:
+ from adafruit_blinka.microcontroller.amlogic.s905x3.pin import Pin
+ from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
+ elif board_id == ap_board.ODROID_XU4:
+ from adafruit_blinka.microcontroller.samsung.exynos5422.pin import Pin
+ from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
+ elif board_id == ap_board.DRAGONBOARD_410C:
+ from adafruit_blinka.microcontroller.snapdragon.apq8016.pin import Pin
+ from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
+ elif board_id == ap_board.JETSON_NANO:
+ from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
+ from adafruit_blinka.microcontroller.tegra.t210.pin import Pin
+ elif board_id == ap_board.JETSON_TX1:
+ from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
+ from adafruit_blinka.microcontroller.tegra.t210.pin import Pin
+ elif board_id == ap_board.JETSON_TX2:
+ from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
+ from adafruit_blinka.microcontroller.tegra.t186.pin import Pin
+ elif board_id == ap_board.JETSON_XAVIER:
+ from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
+ from adafruit_blinka.microcontroller.tegra.t194.pin import Pin
+ elif board_id == ap_board.JETSON_NX:
+ from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
+ from adafruit_blinka.microcontroller.tegra.t194.pin import Pin
+ elif detector.board.ROCK_PI_S:
+ from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
+ from adafruit_blinka.microcontroller.rockchip.rk3308.pin import Pin
+ elif detector.board.SIFIVE_UNLEASHED:
+ from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
+ from adafruit_blinka.microcontroller.hfu540.pin import Pin
+ elif detector.board.ftdi_ft232h:
+ from adafruit_blinka.microcontroller.ft232h.spi import SPI as _SPI
+ from adafruit_blinka.microcontroller.ft232h.pin import Pin
+ elif detector.board.binho_nova:
+ from adafruit_blinka.microcontroller.nova.spi import SPI as _SPI
+ from adafruit_blinka.microcontroller.nova.pin import Pin
+ elif detector.board.greatfet_one:
+ from adafruit_blinka.microcontroller.nxp_lpc4330.spi import SPI as _SPI
+ from adafruit_blinka.microcontroller.nxp_lpc4330.pin import Pin
+ elif board_id in (ap_board.PINE64, ap_board.PINEBOOK, ap_board.PINEPHONE):
+ from adafruit_blinka.microcontroller.allwinner.a64.pin import Pin
+ from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
+ elif board_id == ap_board.CLOCKWORK_CPI3:
+ from adafruit_blinka.microcontroller.allwinner.a33.pin import Pin
+ from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
+ elif board_id == ap_board.ONION_OMEGA2:
+ from adafruit_blinka.microcontroller.mips24kec.pin import Pin
+ from adafruit_blinka.microcontroller.generic_linux.spi import SPI as _SPI
+ else:
+ from machine import SPI as _SPI
from machine import Pin
- from microcontroller import spiPorts
+
+ if self._locked:
# 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 deinit(self):
+ """Deinitialization"""
self._spi = None
self._pinIds = None
- def write(self, buf):
- return self._spi.write(buf)
+ @property
+ def frequency(self):
+ """Return the baud rate if implemented"""
+ try:
+ return self._spi.frequency
+ except AttributeError:
+ raise NotImplementedError(
+ "Frequency attribute not implemented for this platform"
+ )
+
+ def write(self, buf, start=0, end=None):
+ """Write to the SPI device"""
+ return self._spi.write(buf, start, end)
+
+ def readinto(self, buf, start=0, end=None, write_value=0):
+ """Read from the SPI device into a buffer"""
+ return self._spi.readinto(buf, start, end, write_value=write_value)
- def readinto(self, buf):
- return self.readinto(buf)
+ def write_readinto(
+ self, buffer_out, buffer_in, out_start=0, out_end=None, in_start=0, in_end=None
+ ):
+ """Write to the SPI device and read from the SPI device into a buffer"""
+ return self._spi.write_readinto(
+ buffer_out, buffer_in, out_start, out_end, in_start, in_end
+ )
- def write_readinto(self, buffer_out, buffer_in):
- return self.write_readinto(buffer_out, buffer_in)
class UART(Lockable):
+ """
+ Busio UART Class for CircuitPython Compatibility. Used
+ for MicroPython and a few other non-Linux boards.
+ """
class Parity(Enum):
- pass
- Parity.ODD=Parity()
- Parity.EVEN=Parity()
+ """Parity Enumeration"""
- # 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
+ pass # pylint: disable=unnecessary-pass
+
+ Parity.ODD = Parity()
+ Parity.EVEN = Parity()
+
+ def __init__(
+ self,
+ tx,
+ rx,
+ baudrate=9600,
+ bits=8,
+ parity=None,
+ stop=1,
+ timeout=1000,
+ receiver_buffer_size=64,
+ flow=None,
+ ):
+ if detector.board.any_embedded_linux:
+ raise RuntimeError(
+ "busio.UART not supported on this platform. Please use pyserial instead."
+ )
+ if detector.board.binho_nova:
+ from adafruit_blinka.microcontroller.nova.uart import UART as _UART
+ elif detector.board.greatfet_one:
+ from adafruit_blinka.microcontroller.nxp_lpc4330.uart import UART as _UART
+ else:
+ from machine import UART as _UART
+
+ if detector.board.binho_nova:
+ from adafruit_blinka.microcontroller.nova.pin import uartPorts
+ else:
+ 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_id)
+ )
# 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 ValueError(
+ "No Hardware UART on (tx,rx)={}\nValid UART ports: {}".format(
+ (tx, rx), uartPorts
+ )
+ )
def deinit(self):
+ """Deinitialization"""
+ if detector.board.binho_nova:
+ self._uart.deinit()
self._uart = None
def read(self, nbytes=None):
+ """Read from the UART"""
return self._uart.read(nbytes)
def readinto(self, buf, nbytes=None):
+ """Read from the UART into a buffer"""
return self._uart.readinto(buf, nbytes)
def readline(self):
+ """Read a line of characters up to a newline charater from the UART"""
return self._uart.readline()
def write(self, buf):
+ """Write to the UART from a buffer"""
return self._uart.write(buf)
projects / Adafruit_Blinka-hackapet.git / blobdiff