reference_trigger.py 文件源码

def anlg_edge_lvl(self):
        """
        float: Specifies in the units of the measurement the threshold
            at which the Reference Trigger occurs.  Use
            **anlg_edge_slope** to specify on which slope to trigger at
            this threshold.
        """
        val = ctypes.c_double()

        cfunc = lib_importer.windll.DAQmxGetAnlgEdgeRefTrigLvl
        if cfunc.argtypes is None:
            with cfunc.arglock:
                if cfunc.argtypes is None:
                    cfunc.argtypes = [
                        lib_importer.task_handle,
                        ctypes.POINTER(ctypes.c_double)]

        error_code = cfunc(
            self._handle, ctypes.byref(val))
        check_for_error(error_code)

        return val.value