Source code for pynq.lib.switch

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__author__ = "Kevin Anderson"
__copyright__ = "Copyright 2016, Xilinx"
__email__ = "pynq_support@xilinx.com"


[docs]class Switch(object): """This class controls the onboard switches. Attributes ---------- _impl : object An object with appropriate Switch methods """ def __init__(self, device): """Create a new Switch object. Parameters ---------- device : object An object with appropriate Switch methods: read, wait_for_value """ methods = ['read', 'wait_for_value'] if all(m in dir(device) for m in methods): self._impl = device else: raise TypeError("'device' must contain Switch methods: " + str(methods))
[docs] def read(self): """Read the current value of the switch.""" return self._impl.read()
[docs] def wait_for_value(self, value): """Wait for the switch to be closed or opened. Parameters ---------- value: int 1 for the switch up and 0 for the switch down """ if (value != 1) or (value != 0): raise ValueError("'value' must be 0 or 1.") self._impl.wait_for_value(value)