Merge pull request #558 from RPi-Distro/statusboard2

Add StatusZero and StatusBoard

docs/api_boards.rst

@@ -127,6 +127,20 @@ Energenie
     :inherited-members:
     :members:
 
+StatusZero
+==========
+
+.. autoclass:: StatusZero
+    :inherited-members:
+    :members:
+
+StatusBoard
+===========
+
+.. autoclass:: StatusBoard
+    :inherited-members:
+    :members:
+
 SnowPi
 ======
 
@@ -168,4 +182,3 @@ CompositeDevice
 
 .. autoclass:: CompositeDevice(\*args, _order=None, \*\*kwargs)
     :members:
-

docs/images/device_hierarchy.dot

@@ -90,11 +90,13 @@ digraph classes {
     ButtonBoard->HoldMixin;
     PiLiter->LEDBoard;
     PiLiterBarGraph->LEDBarGraph;
+    StatusZero->LEDBoard;
     TrafficLights->LEDBoard;
     SnowPi->LEDBoard;
     PiTraffic->TrafficLights;
     PiStop->TrafficLights;
     TrafficLightsBuzzer->CompositeOutputDevice;
+    StatusBoard->CompositeOutputDevice;
     FishDish->TrafficLightsBuzzer;
     TrafficHat->TrafficLightsBuzzer;
     Robot->CompositeDevice;
@@ -115,4 +117,3 @@ digraph classes {
     PingServer->InternalDevice;
     CPUTemperature->InternalDevice;
 }
-

gpiozero/__init__.py

@@ -80,6 +80,8 @@ from .boards import (
     TrafficLights,
     PiTraffic,
     PiStop,
+    StatusZero,
+    StatusBoard,
     SnowPi,
     TrafficLightsBuzzer,
     FishDish,

gpiozero/boards.py

@@ -12,7 +12,7 @@ except ImportError:
 from time import sleep
 from itertools import repeat, cycle, chain
 from threading import Lock
-from collections import OrderedDict
+from collections import OrderedDict, Counter
 
 from .exc import (
     DeviceClosed,
@@ -795,6 +795,102 @@ class PiStop(TrafficLights):
                                         pwm=pwm, initial_value=initial_value)
 
 
+class StatusZero(LEDBoard):
+    """
+    Extends :class:`LEDBoard` for The Pi Hut's `STATUS Zero`_: a Pi Zero sized
+    add-on board with three sets of red/green LEDs to provide a status
+    indicator.
+
+    The following example designates the first strip the label "wifi" and the
+    second "raining", and turns them green and red respectfully::
+
+        from gpiozero import StatusZero
+
+        status = StatusZero('wifi', 'raining')
+        status.wifi.green.on()
+        status.raining.red.on()
+
+    :param str \*labels:
+        Specify the names of the labels you wish to designate the strips to.
+        You can list up to three labels. If no labels are given, three strips
+        will be initialised with names 'one', 'two', and 'three'. If some, but
+        not all strips are given labels, any remaining strips will not be
+        initialised.
+
+    .. _STATUS Zero: https://thepihut.com/statuszero
+    """
+    default_labels = ('one', 'two', 'three')
+
+    def __init__(self, *labels, **kwargs):
+        pins = (
+            (17, 4),
+            (22, 27),
+            (9, 10),
+        )
+        if len(labels) == 0:
+            labels = self.default_labels
+        elif len(labels) > len(pins):
+            raise ValueError("StatusZero doesn't support more than three labels")
+        dup, count = Counter(labels).most_common(1)[0]
+        if count > 1:
+            raise ValueError("Duplicate label %s" % dup)
+        super(StatusZero, self).__init__(_order=labels, **{
+            label: LEDBoard(red=red, green=green, _order=('red', 'green'), **kwargs)
+            for (green, red), label in zip(pins, labels)
+        })
+
+
+class StatusBoard(CompositeOutputDevice):
+    """
+    Extends :class:`CompositeOutputDevice` for The Pi Hut's `STATUS`_ board: a
+    HAT sized add-on board with five sets of red/green LEDs and buttons to
+    provide a status indicator with additional input.
+
+    The following example designates the first strip the label "wifi" and the
+    second "raining", turns the wifi green and then activates the button to
+    toggle its lights when pressed::
+
+        from gpiozero import StatusBoard
+
+        status = StatusBoard('wifi', 'raining')
+        status.wifi.lights.green.on()
+        status.wifi.button.when_pressed = status.wifi.lights.toggle
+
+    :param str \*labels:
+        Specify the names of the labels you wish to designate the strips to.
+        You can list up to three labels. If no labels are given, three strips
+        will be initialised with names 'one' to 'five'. If some, but not all
+        strips are given labels, any remaining strips will not be initialised.
+
+    .. _STATUS: https://thepihut.com/status
+    """
+    default_labels = ('one', 'two', 'three', 'four', 'five')
+
+    def __init__(self, *labels, **kwargs):
+        pins = (
+            (17, 4, 14),
+            (22, 27, 19),
+            (9, 10, 15),
+            (5, 11, 26),
+            (13, 6, 18),
+        )
+        if len(labels) == 0:
+            labels = self.default_labels
+        elif len(labels) > len(pins):
+            raise ValueError("StatusBoard doesn't support more than five labels")
+        dup, count = Counter(labels).most_common(1)[0]
+        if count > 1:
+            raise ValueError("Duplicate label %s" % dup)
+        super(StatusBoard, self).__init__(_order=labels, **{
+            label: CompositeOutputDevice(
+                button=Button(button),
+                lights=LEDBoard(
+                    red=red, green=green, _order=('red', 'green'), **kwargs
+                ), _order=('button', 'lights'))
+            for (green, red, button), label in zip(pins, labels)
+        })
+
+
 class SnowPi(LEDBoard):
     """
     Extends :class:`LEDBoard` for the `Ryanteck SnowPi`_ board.
@@ -1184,4 +1280,3 @@ class Energenie(SourceMixin, Device):
 
     def off(self):
         self.value = False
-

gpiozero/devices.py

@@ -315,23 +315,28 @@ class CompositeDevice(Device):
         self._named = frozendict({})
         self._namedtuple = None
         self._order = kwargs.pop('_order', None)
+        try:
             if self._order is None:
                 self._order = sorted(kwargs.keys())
             else:
                 for missing_name in set(kwargs.keys()) - set(self._order):
                     raise CompositeDeviceBadOrder('%s missing from _order' % missing_name)
             self._order = tuple(self._order)
-        super(CompositeDevice, self).__init__()
             for name in set(self._order) & set(dir(self)):
                 raise CompositeDeviceBadName('%s is a reserved name' % name)
-        self._all = args + tuple(kwargs[v] for v in self._order)
+            for dev in chain(args, kwargs.values()):
-        for dev in self._all:
                 if not isinstance(dev, Device):
                     raise CompositeDeviceBadDevice("%s doesn't inherit from Device" % dev)
             self._named = frozendict(kwargs)
             self._namedtuple = namedtuple('%sValue' % self.__class__.__name__, chain(
-            (str(i) for i in range(len(args))), self._order),
+                ('device_%d' % i for i in range(len(args))), self._order))
-            rename=True)
+        except:
+            for dev in chain(args, kwargs.values()):
+                if isinstance(dev, Device):
+                    dev.close()
+            raise
+        self._all = args + tuple(kwargs[v] for v in self._order)
+        super(CompositeDevice, self).__init__()
 
     def __getattr__(self, name):
         # if _named doesn't exist yet, pretend it's an empty dict
@@ -377,6 +382,7 @@ class CompositeDevice(Device):
         if self._all:
             for device in self._all:
                 device.close()
+            self._all = ()
 
     @property
     def closed(self):

tests/test_boards.py

@@ -30,6 +30,8 @@ def setup_function(function):
         'test_led_board_fade_background',
         'test_led_bar_graph_pwm_value',
         'test_led_bar_graph_pwm_initial_value',
+        'test_statusboard_kwargs',
+        'test_statuszero_kwargs',
         ) else MockPin
 
 def teardown_function(function):
@@ -778,3 +780,113 @@ def test_energenie():
         pins[5].assert_states_and_times([(0.0, False), (0.1, True), (0.25, False)])
         device1.close()
         assert repr(device1) == '<gpiozero.Energenie object closed>'
+
+def test_statuszero_init():
+    with StatusZero() as sz:
+        assert sz.namedtuple._fields == ('one', 'two', 'three')
+    with StatusZero('a') as sz:
+        assert sz.namedtuple._fields == ('a',)
+    with StatusZero('a', 'b') as sz:
+        assert sz.namedtuple._fields == ('a', 'b')
+    with StatusZero('a', 'b', 'c') as sz:
+        assert sz.namedtuple._fields == ('a', 'b', 'c')
+    with pytest.raises(ValueError):
+        StatusZero('a', 'b', 'c', 'd')
+    with pytest.raises(ValueError):
+        StatusZero('0')
+    with pytest.raises(ValueError):
+        StatusZero('foo', 'hello world')
+    with pytest.raises(ValueError):
+        StatusZero('foo', 'foo')
+
+def test_statuszero():
+    with StatusZero() as sz:
+        assert isinstance(sz.one, LEDBoard)
+        assert isinstance(sz.two, LEDBoard)
+        assert isinstance(sz.three, LEDBoard)
+        assert isinstance(sz.one.red, LED)
+        assert isinstance(sz.one.green, LED)
+        assert sz.value == ((False, False), (False, False), (False, False))
+        sz.on()
+        assert sz.value == ((True, True), (True, True), (True, True))
+        sz.one.green.off()
+        assert sz.one.value == (True, False)
+
+def test_statuszero_kwargs():
+    with StatusZero(pwm=True, initial_value=True) as sz:
+        assert isinstance(sz.one, LEDBoard)
+        assert isinstance(sz.two, LEDBoard)
+        assert isinstance(sz.three, LEDBoard)
+        assert isinstance(sz.one.red, PWMLED)
+        assert isinstance(sz.one.green, PWMLED)
+        assert sz.value == ((1, 1), (1, 1), (1, 1))
+        sz.off()
+        assert sz.value == ((0, 0), (0, 0), (0, 0))
+
+def test_statuszero_named():
+    with StatusZero('a') as sz:
+        assert isinstance(sz.a, LEDBoard)
+        assert isinstance(sz.a.red, LED)
+        with pytest.raises(AttributeError):
+            sz.one
+
+def test_statusboard_init():
+    with StatusBoard() as sb:
+        assert sb.namedtuple._fields == ('one', 'two', 'three', 'four', 'five')
+    with StatusBoard('a') as sb:
+        assert sb.namedtuple._fields == ('a',)
+    with StatusBoard('a', 'b') as sb:
+        assert sb.namedtuple._fields == ('a', 'b',)
+    with StatusBoard('a', 'b', 'c', 'd', 'e') as sb:
+        assert sb.namedtuple._fields == ('a', 'b', 'c', 'd', 'e')
+    with pytest.raises(ValueError):
+        StatusBoard('a', 'b', 'c', 'd', 'e', 'f')
+    with pytest.raises(ValueError):
+        StatusBoard('0')
+    with pytest.raises(ValueError):
+        StatusBoard('foo', 'hello world')
+    with pytest.raises(ValueError):
+        StatusBoard('foo', 'foo')
+
+def test_statusboard():
+    with StatusBoard() as sb:
+        assert isinstance(sb.one, CompositeOutputDevice)
+        assert isinstance(sb.two, CompositeOutputDevice)
+        assert isinstance(sb.five, CompositeOutputDevice)
+        assert isinstance(sb.one.button, Button)
+        assert isinstance(sb.one.lights, LEDBoard)
+        assert isinstance(sb.one.lights.red, LED)
+        assert isinstance(sb.one.lights.green, LED)
+        assert sb.value == ((False, (False, False)), (False, (False, False)),
+                            (False, (False, False)), (False, (False, False)),
+                            (False, (False, False)))
+        sb.on()
+        assert sb.value == ((False, (True, True)), (False, (True, True)),
+                            (False, (True, True)), (False, (True, True)),
+                            (False, (True, True)))
+        sb.one.lights.green.off()
+        assert sb.one.value == (False, (True, False))
+
+def test_statusboard_kwargs():
+    with StatusBoard(pwm=True, initial_value=True) as sb:
+        assert isinstance(sb.one, CompositeOutputDevice)
+        assert isinstance(sb.two, CompositeOutputDevice)
+        assert isinstance(sb.five, CompositeOutputDevice)
+        assert isinstance(sb.one.button, Button)
+        assert isinstance(sb.one.lights, LEDBoard)
+        assert isinstance(sb.one.lights.red, PWMLED)
+        assert isinstance(sb.one.lights.green, PWMLED)
+        assert sb.value == ((False, (1, 1)), (False, (1, 1)), (False, (1, 1)),
+                           (False, (1, 1)), (False, (1, 1)))
+        sb.off()
+        assert sb.value == ((False, (0, 0)), (False, (0, 0)), (False, (0, 0)),
+                            (False, (0, 0)), (False, (0, 0)))
+
+def test_statusboard_named():
+    with StatusBoard('a') as sb:
+        assert isinstance(sb.a, CompositeOutputDevice)
+        assert isinstance(sb.a.button, Button)
+        assert isinstance(sb.a.lights, LEDBoard)
+        assert isinstance(sb.a.lights.red, LED)
+        with pytest.raises(AttributeError):
+            sb.one

tests/test_devices.py

@@ -91,7 +91,7 @@ def test_composite_device_sequence():
         assert len(device) == 2
         assert device[0].pin.number == 4
         assert device[1].pin.number == 5
-        assert device.namedtuple._fields == ('_0', '_1')
+        assert device.namedtuple._fields == ('device_0', 'device_1')
 
 def test_composite_device_values():
     with CompositeDevice(