我正在尝试使用一条USB电缆从树莓派与LeCroy WaveRunner 640Zi示波器通信。我已经在Windows下完成了连接，但是现在在Linux下无法正常工作。
如果我运行lsusb指令，会看到如下内容：
$ lsusb
Bus 001 Device 009: ID 05ff:1023 LeCroy Corp.
...
如果我现在转向Python，我会得到这样的结果：
$ python3
Python 3.7.3 (default, Dec 20 2019, 18:57:59)
[GCC 8.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import pyvisa
>>> pyvisa.ResourceManager().list_resources()
('ASRL/dev/ttyAMA0::INSTR',)
>>>
示波器不在那里（我认为
ASRL/dev/ttyAMA0::INSTR是来自树莓派本身的）。我认为示波器已经正确配置，因为如果我进入选项（使用示波器本身的屏幕）并转到“远程选项”，我会看到它设置为USB，并且VISA地址为USB0::bla::bla::bla::INSTR。我尝试按照此页面中的说明进行操作，但没有成功。如果我运行
python3 -m visa info，我会得到：$ python3 -m visa info
~/.local/lib/python3.7/site-packages/visa.py:23: FutureWarning: The visa module provided by PyVISA is being deprecated. You can replace `import visa` by `import pyvisa as visa` to achieve the same effect.
The reason for the deprecation is the possible conflict with the visa package provided by the https://github.com/visa-sdk/visa-python which can result in hard to debug situations.
FutureWarning,
Machine Details:
Platform ID: Linux-4.19.97-v7+-armv7l-with-debian-10.3
Processor:
Python:
Implementation: CPython
Executable: /usr/bin/python3
Version: 3.7.3
Compiler: GCC 8.3.0
Bits: 32bit
Build: Dec 20 2019 18:57:59 (#default)
Unicode: UCS4
PyVISA Version: 1.11.3
Backends:
ivi:
Version: 1.11.3 (bundled with PyVISA)
Binary library: Not found
py:
Version: 0.5.2
ASRL INSTR: Available via PySerial (3.4)
USB INSTR: Available via PyUSB (1.0.2). Backend: libusb1
USB RAW: Available via PyUSB (1.0.2). Backend: libusb1
TCPIP INSTR: Available
TCPIP SOCKET: Available
GPIB INSTR:
Please install linux-gpib (Linux) or gpib-ctypes (Windows, Linux) to use this resource type. Note that installing gpib-ctypes will give you access to a broader range of funcionality.
No module named 'gpib'
我也尝试着通过 pyvisa.ResourceManager().open_resource('USB0::bla::bla::bla::INSTR') 不 "列出资源" 连接示波器，但我获得了以下提示：
>>> osc = pyvisa.ResourceManager().open_resource('USB0::0x05ff::0x1023::2810N60091::INSTR')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "~/.local/lib/python3.7/site-packages/pyvisa/highlevel.py", line 3304, in open_resource
res.open(access_mode, open_timeout)
File "~/.local/lib/python3.7/site-packages/pyvisa/resources/resource.py", line 298, in open
self._resource_name, access_mode, open_timeout
File "~/.local/lib/python3.7/site-packages/pyvisa/highlevel.py", line 3232, in open_bare_resource
return self.visalib.open(self.session, resource_name, access_mode, open_timeout)
File "~/.local/lib/python3.7/site-packages/pyvisa_py/highlevel.py", line 167, in open
sess = cls(session, resource_name, parsed, open_timeout)
File "~/.local/lib/python3.7/site-packages/pyvisa_py/sessions.py", line 323, in __init__
self.after_parsing()
File "~/.local/lib/python3.7/site-packages/pyvisa_py/usb.py", line 84, in after_parsing
self.parsed.serial_number,
File "~/.local/lib/python3.7/site-packages/pyvisa_py/protocols/usbtmc.py", line 287, in __init__
super(USBTMC, self).__init__(vendor, product, serial_number, **kwargs)
File "~/.local/lib/python3.7/site-packages/pyvisa_py/protocols/usbtmc.py", line 199, in __init__
raise ValueError("No device found.")
ValueError: No device found.
>>>