Initial commit

Author: deshipu

LICENSE

@@ -1,6 +1,6 @@
 The MIT License (MIT)
 
-Copyright (c) 2017 Radomir Dopieralski for Adafruit Industries
+Copyright (c) 2017 Radomir Dopieralski, written for Adafruit Industries
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.rst

@@ -1,40 +1,70 @@
-
 Introduction
 ============
 
 .. image:: https://readthedocs.org/projects/adafruit-circuitpython-MAX31855/badge/?version=latest
     :target: https://circuitpython.readthedocs.io/projects/MAX31855/en/latest/
     :alt: Documentation Status
 
-.. image :: https://badges.gitter.im/adafruit/circuitpython.svg
+.. image:: https://badges.gitter.im/adafruit/circuitpython.svg
     :target: https://gitter.im/adafruit/circuitpython?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge
     :alt: Gitter
 
-TODO
 
 Dependencies
 =============
-This driver depends on:
 
-* `Adafruit CircuitPython <https://github.com/adafruit/circuitpython>`_
-* `Bus Device <https://github.com/adafruit/Adafruit_CircuitPython_BusDevice>`_
+This driver depends on the `Bus Device
+<https://github.com/adafruit/Adafruit_CircuitPython_BusDevice>`_ library.
+Please ensure is is also available on the CircuitPython filesystem.  This is
+easily achieved by downloading `a library and driver bundle
+<https://github.com/adafruit/Adafruit_CircuitPython_Bundle>`_.
 
-Please ensure all dependencies are available on the CircuitPython filesystem.
-This is easily achieved by downloading
-`the Adafruit library and driver bundle <https://github.com/adafruit/Adafruit_CircuitPython_Bundle>`_.
 
-Usage Example
-=============
+Usage Notes
+===========
+
+Of course, you must import the library to use it:
+
+.. code:: python
+
+    import adafruit_max31855
+
+You also need to create an SPI interface object, and a pin object for the
+chip select pin. You can use any pin for the CS, but we use D5 here:
+
+
+.. code:: python
+
+    from nativeio import SPI, DigitalInOut
+    import board
+
+    spi = SPI(clock=board.SCK, MISO=board.MISO, MOSI=board.MOSI)
+    cs = DigitalInOut(board.D5)
+
+Next, just create the sensor object:
+
+.. code:: python
+
+    sensor = adafruit_max31855.MAX31855(spi, cs)
+
+And you can start making measurements:
+
+.. code:: python
+
+    print(sensor.temperature)
+
+The temperature is read in degrees Celsius (°C). You have to convert it to
+other units yourself, if you need it.
 
-TODO
 
 Contributing
 ============
 
 Contributions are welcome! Please read our `Code of Conduct
-<https://github.com/adafruit/Adafruit_CircuitPython_MAX31855/blob/master/CODE_OF_CONDUCT.md>`_
+<https://github.com/adafruit/Adafruit_CircuitPython_MAX21855/blob/master/CODE_OF_CONDUCT.md>`_
 before contributing to help this project stay welcoming.
 
+
 API Reference
 =============
 

adafruit_MAX31855.py

@@ -0,0 +1,72 @@
+# The MIT License (MIT)
+#
+# Copyright (c) 2017 Radomir Dopieralski for Adafruit Industries.
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+"""
+``adafruit_max31855``
+=====================
+
+This is a CircuitPython driver for the Maxim Integrated MAX31855 thermocouple
+amplifier module.
+
+"""
+
+import ustruct
+
+from adafruit_bus_device.spi_device import SPIDevice
+
+
+class MAX31855:
+    """
+    Driver for the MAX31855 thermocouple amplifier.
+    """
+
+    def __init__(self, spi, cs):
+        self.spi_device = SPIDevice(spi, cs)
+        self.data = bytearray(4)
+
+    def _read(self, internal=False):
+        with self.spi_device as spi:
+            spi.readinto(self.data)
+        if self.data[3] & 0x01:
+            raise RuntimeError("thermocouple not connected")
+        if self.data[3] & 0x02:
+            raise RuntimeError("short circuit to ground")
+        if self.data[3] & 0x04:
+            raise RuntimeError("short circuit to power")
+        if self.data[1] & 0x01:
+            raise RuntimeError("faulty reading")
+        temp, refer = ustruct.unpack('>hh', self.data)
+        refer >>= 4
+        temp >>= 2
+        if internal:
+            return refer
+        return temp
+
+    @property
+    def temperature(self):
+        """Thermocouple temperature in degrees Celsius."""
+        return self._read() / 4
+
+    @property
+    def reference_temperature(self):
+        """Internal reference temperature in degrees Celsius."""
+        return self._read(True) * 0.625

adafruit_max31855.py

@@ -1,5 +1,3 @@
 
-.. If you created a package, create one automodule per module in the package.
-
 .. automodule:: adafruit_max31855
    :members:

api.rst

@@ -28,7 +28,7 @@
 # General information about the project.
 project = u'Adafruit MAX31855 Library'
 copyright = u'2017 Radomir Dopieralski'
-author = u'Scott Shawcroft'
+author = u'Radomir Dopieralski'
 
 # The version info for the project you're documenting, acts as replacement for
 # |version| and |release|, also used in various other places throughout the
@@ -118,7 +118,7 @@
 #  author, documentclass [howto, manual, or own class]).
 latex_documents = [
     (master_doc, 'AdafruitMAX31855Library.tex', u'Adafruit MAX31855 Library Documentation',
-     u'Phiilip Moyer', 'manual'),
+     u'Radomir Dopieralski', 'manual'),
 ]
 
 # -- Options for manual page output ---------------------------------------