wavegen.py 文件源码

def setWaveform(self, waveform):
        """Set the periodic waveform to generate.

        Args:
            waveform:   String describing the type of waveform to produce.
                        May be 'sinusoid' or 'sawtooth' or 'square'
        """
        waveform = waveform.lower()

        with self.lock:
            try:
                # index into keys gives us an integer id
                self.waveform.value = list(waveforms.keys()).index(waveform)
            except ValueError:
                raise ValueError('Invalid waveform %s.' % str(waveform))