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Add max_voltage property, ensure it is positive and cast to a float

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Ben Nuttall
2016-05-26 23:21:29 +01:00
parent 28f1d34ff9
commit de258bc1ad
1 changed files with 10 additions and 1 deletions
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11
gpiozero/spi_devices.py
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@@ -76,8 +76,10 @@ class AnalogInputDevice(SPIDevice):
if bits is None: if bits is None:
raise InputDeviceError('you must specify the bit resolution of the device') raise InputDeviceError('you must specify the bit resolution of the device')
self._bits = bits self._bits = bits
if max_voltage <= 0:
raise InputDeviceError('max_voltage must be positive')
self._max_voltage = float(max_voltage)
super(AnalogInputDevice, self).__init__(shared=True, **spi_args) super(AnalogInputDevice, self).__init__(shared=True, **spi_args)
self._max_voltage = max_voltage
@property @property
def bits(self): def bits(self):
@@ -104,6 +106,13 @@ class AnalogInputDevice(SPIDevice):
""" """
return self._read() return self._read()
@property
def max_voltage(self):
"""
The voltage required to set the device's value to 1
"""
return self._max_voltage
@property @property
def voltage(self): def voltage(self):
""" """