PyBarst 2.1

使用示例

启动服务器

>>> # create a local server instance with a pipe named TestPipe. Since not
>>> # provided, the executable is searched for in pybarst.dep_bins and in
>>> # Program Files.
>>> server = BarstServer(pipe_name=r'\\.\pipe\TestPipe')
>>> # now actually create the server and start it running
>>> server.open_server()
>>> # Connect to a server running on remote computer named PC_Name using a pipe named TestPipe
>>> server2 = BarstServer(pipe_name=r'\\PC_Name\pipe\TestPipe')
>>> # now open the connection to the remote server
>>> server2.open_server()

获取当前服务器时间

>>> server.clock()
(1.5206475727928106, 13045896424.049448)

使用RTV-4视频卡的示例

>>> from pybarst.core.server import BarstServer
>>> from pybarst.rtv import RTVChannel

>>> server = BarstServer(pipe_name=r'\\.\pipe\TestPipe')
>>> server.open_server()
>>> print(server.get_manager('rtv'))
{'version': 1080L, 'chan': 1, 'chan_id': 'RTVMan'}

>>> # for the code below, there should be a RTV-4 like device connected, with
>>> # a port 0 available
>>> rtv = RTVChannel(server=server, chan=0, video_fmt='full_NTSC', frame_fmt='rgb24', lossless=False)
>>> rtv.open_channel()
>>> rtv.set_state(state=True)

>>> # data is a buffer containing the raw image data
>>> time, data = rtv.read()
>>> print(time, len(data), rtv.buffer_size)
(12865.015067682945, 921600, 921600L)
>>> time, data = rtv.read()
>>> print(time, len(data), rtv.buffer_size)
(12865.048412758983, 921600, 921600L)
>>> # remove any data queued, otherwise read will return any waiting data
>>> rtv.set_state(state=False, flush=True)

使用Windows串行端口的示例

>>> from pybarst.core.server import BarstServer
>>> from pybarst.serial import SerialChannel

>>> server = BarstServer(pipe_name=r'\\.\pipe\TestPipe')
>>> server.open_server()
>>> print(server.get_manager('serial'))
{'version': 498139398L, 'chan': 0, 'chan_id': 'SerMan'}

>>> # for this example, COM3 should have a loopback cable connected to it.
>>> serial = SerialChannel(server=server, port_name='COM3', max_write=32, max_read=32)
>>> serial.open_channel()

>>> time, val = serial.write(value='How are you today?', timeout=10000)
>>> print(time, val)
(1931.5567431509603, 18)
>>> # read the exact number of chars written.
>>> time, val = serial.read(read_len=len('How are you today?'), timeout=10000)
>>> print(time, val)
(1931.5607736011307, 'How are you today?')

>>> serial.close_channel_server()