test_stream_digital_readers_writers.py 文件源码

def test_one_sample_port_byte(self, x_series_device, seed):
        # Reset the pseudorandom number generator with seed.
        random.seed(seed)

        do_port = random.choice(
            [d for d in x_series_device.do_ports if d.do_port_width <= 8])

        with nidaqmx.Task() as task:
            task.do_channels.add_do_chan(
                do_port.name, line_grouping=LineGrouping.CHAN_FOR_ALL_LINES)

            # Generate random values to test.
            values_to_test = [int(random.getrandbits(do_port.do_port_width))
                              for _ in range(10)]

            writer = DigitalSingleChannelWriter(task.out_stream)
            reader = DigitalSingleChannelReader(task.in_stream)

            values_read = []
            for value_to_test in values_to_test:
                writer.write_one_sample_port_byte(value_to_test)
                time.sleep(0.001)
                values_read.append(reader.read_one_sample_port_byte())

            numpy.testing.assert_array_equal(values_read, values_to_test)