watchdog.py 文件源码

def expir_trig_dig_edge_edge(self):
        """
        :class:`nidaqmx.constants.Edge`: Specifies on which edge of a
            digital signal to expire the watchdog task.
        """
        val = ctypes.c_int()

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

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

        return Edge(val.value)