Merge pull request #618 from SIMATICmeetsLinux/main

Added support for Siemens Simatic IOT2050 Basic/Advanced

src/adafruit_blinka/board/siemens/__init__.py

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+# SPDX-FileCopyrightText: 2022 Martin Schnur for Siemens AG
+#
+# SPDX-License-Identifier: MIT
+"""Boards definition from Siemens AG"""

src/adafruit_blinka/board/siemens/siemens_iot2050.py

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+# SPDX-FileCopyrightText: 2022 Martin Schnur for Siemens AG
+#
+# SPDX-License-Identifier: MIT
+"""Pin definitions for the Siemens Simatic IOT2050 Basic/Advanced."""
+# Output Pins are the same as Arduino Uno R3,Overall 31 + 1 Pins !
+
+from adafruit_blinka.microcontroller.am65xx import pin
+
+# Digital Pins
+D0 = pin.D0
+D1 = pin.D1
+D2 = pin.D2
+D3 = pin.D3
+D4 = pin.D4
+D5 = pin.D5
+D6 = pin.D6
+D7 = pin.D7
+D8 = pin.D8
+D9 = pin.D9
+D10 = pin.D10
+D11 = pin.D11
+D12 = pin.D12
+D13 = pin.D13
+D14 = pin.D14
+D15 = pin.D15
+D16 = pin.D16
+D17 = pin.D17
+D18 = pin.D18
+D19 = pin.D19
+
+# Analog Pins
+A0 = pin.A0
+A1 = pin.A1
+A2 = pin.A2
+A3 = pin.A3
+A4 = pin.A4
+A5 = pin.A5
+
+# I2C allocation
+SCL = pin.I2C_SCL
+SDA = pin.I2C_SDA
+
+# SPI allocation
+SCLK = pin.SPIO_SCLK
+MOSI = pin.SPIO_MOSI
+MISO = pin.SPIO_MISO
+SS = pin.SPIO_SS
+
+# UART allocation
+UART_TX = pin.UART_TX
+UART_RX = pin.UART_RX
+
+
+# PWM allocation
+PWM_4 = pin.PWM_4
+PWM_5 = pin.PWM_5
+PWM_6 = pin.PWM_6
+PWM_7 = pin.PWM_7
+PWM_8 = pin.PWM_8
+PWM_9 = pin.PWM_9

src/adafruit_blinka/microcontroller/am65xx/analogio.py

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+# SPDX-FileCopyrightText: 2021 Melissa LeBlanc-Williams for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+"""
+`analogio` - Analog input and output control
+=================================================
+See `CircuitPython:analogio` in CircuitPython for more details.
+* Author(s): Martin Schnur
+"""
+
+from adafruit_blinka.microcontroller.am65xx.pin import Pin
+from adafruit_blinka import ContextManaged
+
+
+class AnalogIn(ContextManaged):
+    """Analog Input Class"""
+
+    def __init__(self, pin):
+        self._pin = Pin(pin.id)
+        self._pin.init(mode=Pin.ADC)
+
+    @property
+    def value(self):
+        """Read the ADC and return the value"""
+        return self._pin.value()
+
+    # pylint: disable=no-self-use
+    @value.setter
+    def value(self, value):
+        # emulate what CircuitPython does
+        raise AttributeError("'AnalogIn' object has no attribute 'value'")
+
+    # pylint: enable=no-self-use
+
+    def deinit(self):
+        del self._pin
+
+
+class AnalogOut(ContextManaged):
+    """Analog Output Class"""
+
+    def __init__(self, pin):
+        self._pin = Pin(pin.id)
+        self._pin.init(mode=Pin.DAC)
+
+    @property
+    def value(self):
+        """Return an error. This is output only."""
+        # emulate what CircuitPython does
+        raise AttributeError("AM65xx doesn't have an DAC! No Analog Output possible!")
+
+    @value.setter
+    def value(self, value):
+        self._pin.value(value)
+
+    def deinit(self):
+        del self._pin

src/adafruit_blinka/microcontroller/am65xx/i2c.py

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+# SPDX-FileCopyrightText: 2021 Melissa LeBlanc-Williams for Adafruit Industries
+#
+# SPDX-License-Identifier: MIT
+"""Generic Linux I2C class using PureIO's smbus class"""
+from Adafruit_PureIO import smbus
+
+
+class I2C:
+    """I2C class"""
+
+    MASTER = 0
+    SLAVE = 1
+    _baudrate = None
+    _mode = None
+    _i2c_bus = None
+
+    # pylint: disable=unused-argument
+    def __init__(self, bus_num, mode=MASTER, baudrate=None):
+        if mode != self.MASTER:
+            raise NotImplementedError("Only I2C Master supported!")
+        _mode = self.MASTER
+
+        # if baudrate != None:
+        #    print("I2C frequency is not settable in python, ignoring!")
+
+        try:
+            self._i2c_bus = smbus.SMBus(bus_num)
+        except FileNotFoundError:
+            raise RuntimeError(
+                "I2C Bus #%d not found, check if enabled in config!" % bus_num
+            ) from RuntimeError
+
+    # pylint: enable=unused-argument
+
+    def scan(self):
+        """Try to read a byte from each address, if you get an OSError
+        it means the device isnt there"""
+        found = []
+        for addr in range(0, 0x80):
+            try:
+                self._i2c_bus.read_byte(addr)
+            except OSError:
+                continue
+            found.append(addr)
+        return found
+
+    # pylint: disable=unused-argument
+    def writeto(self, address, buffer, *, start=0, end=None, stop=True):
+        """Write data from the buffer to an address"""
+        if end is None:
+            end = len(buffer)
+        self._i2c_bus.write_bytes(address, buffer[start:end])
+
+    def readfrom_into(self, address, buffer, *, start=0, end=None, stop=True):
+        """Read data from an address and into the buffer"""
+        if end is None:
+            end = len(buffer)
+
+        readin = self._i2c_bus.read_bytes(address, end - start)
+        for i in range(end - start):
+            buffer[i + start] = readin[i]
+
+    # pylint: enable=unused-argument
+
+    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 data from buffer_out to an address and then
+        read data from an address and into buffer_in
+        """
+        if out_end is None:
+            out_end = len(buffer_out)
+        if in_end is None:
+            in_end = len(buffer_in)
+        if stop:
+            # To generate a stop in linux, do in two transactions
+            self.writeto(address, buffer_out, start=out_start, end=out_end, stop=True)
+            self.readfrom_into(address, buffer_in, start=in_start, end=in_end)
+        else:
+            # To generate without a stop, do in one block transaction
+            readin = self._i2c_bus.read_i2c_block_data(
+                address, buffer_out[out_start:out_end], in_end - in_start
+            )
+            for i in range(in_end - in_start):
+                buffer_in[i + in_start] = readin[i]