usbtmc | Go library to communicate with a USB Test | Test Automation library

by gotmc Go Version: Current License: MIT

X-Ray Key Features Code Snippets Community Discussions(4)Vulnerabilities Install Support

kandi X-RAY | usbtmc Summary

usbtmc is a Go library typically used in Automation, Test Automation applications. usbtmc has no bugs, it has no vulnerabilities, it has a Permissive License and it has low support. You can download it from GitHub.

USBTMC is a USB device class specification for test equiment and instrumentation devices, such as oscilloscopes, digital multimeters, and function generators. USBTMC requires three endpoints:. Additionally, the USBTMC subclass USB488 has an Interrupt-IN endpoint.

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Security

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Support

usbtmc has a low active ecosystem.

It has 10 star(s) with 2 fork(s). There are 2 watchers for this library.

It had no major release in the last 6 months.

There are 4 open issues and 4 have been closed. On average issues are closed in 516 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of usbtmc is current.

Quality

usbtmc has no bugs reported.

Security

usbtmc has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

usbtmc is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

usbtmc releases are not available. You will need to build from source code and install.

Installation instructions are not available. Examples and code snippets are available.

Top functions reviewed by kandi - BETA

kandi has reviewed usbtmc and discovered the below as its top functions. This is intended to give you an instant insight into usbtmc implemented functionality, and help decide if they suit your requirements.

Creates a visa resource
encodeMsgInBulkOutHeader encodes a BulkInBulkOut header .
encodeBulkOutHeader encodes BulkOut header .
exitBootMode terminates the boot mode
NewContext returns a new libusb context
NewDeviceByVIDPID returns a new device .
encodeBulkHeaderPrefix encodes a Bulk header prefix .
defaultDevice returns the default device
nextbTag returns the next b tag .
invert b tag

Get all kandi verified functions for this library.

usbtmc Key Features

No Key Features are available at this moment for usbtmc.

usbtmc Examples and Code Snippets

No Code Snippets are available at this moment for usbtmc.

Community Discussions

Trending Discussions on usbtmc

PyVISA not listing USB instrument on Linux

How to save 1 million point trace from oscilloscope using PyVISA

Pyusb/libusb0 insufficient permissions Windows

Memory corruption on exit (or stupid user error)

QUESTION

PyVISA not listing USB instrument on Linux

Asked 2021-Mar-04 at 17:59

I am trying to communicate with a LeCroy WaveRunner 640Zi oscilloscope from a Raspberry Pi, they are connected with a USB cable. I have already done this under Windows, but now I am not able to make it work in Linux.

If I run lsusb I see this:

...

ANSWER

Answered 2021-Mar-04 at 17:59

I managed to find a solution which I share for the sake of future generations to come. I had just to add a line to the file /etc/udev/rules.d/99-com.rules with the content SUBSYSTEM=="usb", MODE="0666", GROUP="usbusers" (or append this line in case the file already exists). This can be done first running

Source https://stackoverflow.com/questions/66480203

QUESTION

How to save 1 million point trace from oscilloscope using PyVISA

Asked 2021-Mar-02 at 16:42

I am trying to implement some code from this old tutorial from 2015 (which is using a VERY old version of PyVISA, so everything is different now):

...

ANSWER

Answered 2021-Mar-02 at 13:02

The scope you are using "Rigol DS1104Z" has different SCPI commands to the "Rigol DS1052E" in your example code.

The command ":WAV:POIN:MODE RAW" will work on the Rigol DS1052E but not on the Rigol DS1104Z

You can check if the instrument has an error by querying ":SYSTem:ERRor?"

Source https://stackoverflow.com/questions/66432540

QUESTION

Pyusb/libusb0 insufficient permissions Windows

Asked 2019-Feb-18 at 14:29

I want to read out a USB measurement device in python. For this I use the usbtmc module. It requires Pyusb and libusb-win32. I installed both and it seems that they are running fine. In the device manager I can find my USB device. And in python too. For example:

...

ANSWER

Answered 2019-Feb-18 at 14:29

The Keysight support helped me out: I had to install the Keysight drivers (connection expert) and the pyvisa and pyvisa-py module. It is now working!

Source https://stackoverflow.com/questions/54629985

QUESTION

Memory corruption on exit (or stupid user error)

Asked 2018-May-28 at 23:26

I have a problem where the objects holding imported python modules are being corrupted, but only after sys.exit() is explicitly called. This is also intermittent. I have stripped out a large portion of the code except for the "standard" pyusb module (I have used the very latest version of that). Very little actually happens.

If the program calls sys.exit() then some object IDs get changed to garbage values. If I leave that out then there are no errors!

Is this really a bug in Python? That seems unlikely. What did I do wrong?

===== main program "bug_happens.py"

...

ANSWER

Answered 2018-May-28 at 23:26

When the Python interpreter exits, the runtime is being torn down and the ordering of object deletion is not something you can rely on. In fact, it is not even guaranteed that __del__() methods are called at all when the interpreter exits.

The objects a custom __del__ needs to access (including other modules) may already have been deleted or set to None, which would cause exactly the exceptions you're seeing here ('NoneType' object has no attribute...)

That's not really a "memory corruption", it's just poor code written for the Instrument class. Any necessary setup/teardown context should be managed with __enter__ and __exit__, since __del__ is unsuitable for this purpose. So, this issue is more or less a bug in Instrument. This code could possibly be improved by taking advantage of a datamodel guarantee documented here:

Python guarantees that globals whose name begins with a single underscore are deleted from their module before other globals are deleted; if no other references to such globals exist, this may help in assuring that imported modules are still available at the time when the __del__() method is called.

Source https://stackoverflow.com/questions/50574201

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