drivers | TinyGo drivers for sensors, displays, and other devices that use I2C, SPI, GPIO, ADC, and UART inter
kandi X-RAY | drivers Summary
kandi X-RAY | drivers Summary
This package provides a collection of hardware drivers for devices such as sensors and displays that can be used together with TinyGo.
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Trending Discussions on drivers
QUESTION
I was programming a game using Python and a sound effect needed to be played, so I used the playsound module:
...ANSWER
Answered 2021-Sep-05 at 07:20I don't think PlaySound supports .wav files. Try converting Typing.wav
into an mp3 file. Then change
QUESTION
I have a Codesandbox
I have this app that displays different files like jpg, mp4 or now docx files. I can't make docx file position so it look good but jpg or mp4 is working OK.
Try it just open a doxc file.
In file FileContentRenderer.jsx here below I use switch case
and n open Component needed like docx-viewer.jsx
ANSWER
Answered 2022-Jan-17 at 15:52Replace your return block with following block in your docx-viewer.jsx
.
QUESTION
I got this error after install a new xampp version (php8). and clone my codeigniter project.
...ANSWER
Answered 2022-Feb-16 at 14:37For anyone else that comes across this error, I also experienced it after upgrading to PHP 8.1. The only way I could find to "fix" it was by adding #[\ReturnTypeWillChange]
before the open
, read
, write
, close
, destroy
and gc
functions in /system/libraries/Session/drivers/Session_files_driver.php
. For example:
QUESTION
Does it make sense to use Conda + Poetry for a Machine Learning project? Allow me to share my (novice) understanding and please correct or enlighten me:
As far as I understand, Conda and Poetry have different purposes but are largely redundant:
- Conda is primarily a environment manager (in fact not necessarily Python), but it can also manage packages and dependencies.
- Poetry is primarily a Python package manager (say, an upgrade of pip), but it can also create and manage Python environments (say, an upgrade of Pyenv).
My idea is to use both and compartmentalize their roles: let Conda be the environment manager and Poetry the package manager. My reasoning is that (it sounds like) Conda is best for managing environments and can be used for compiling and installing non-python packages, especially CUDA drivers (for GPU capability), while Poetry is more powerful than Conda as a Python package manager.
I've managed to make this work fairly easily by using Poetry within a Conda environment. The trick is to not use Poetry to manage the Python environment: I'm not using commands like poetry shell
or poetry run
, only poetry init
, poetry install
etc (after activating the Conda environment).
For full disclosure, my environment.yml file (for Conda) looks like this:
...ANSWER
Answered 2022-Feb-14 at 10:04As I wrote in the comment, I've been using a very similar Conda + Poetry setup in a data science project for the last year, for reasons similar to yours, and it's been working fine. The great majority of my dependencies are specified in pyproject.toml
, but when there's something that's unavailable in PyPI, I add it to environment.yml
.
Some additional tips:
- Add Poetry, possibly with a version number (if needed), as a dependency in
environment.yml
, so that you get Poetry installed when you runconda env create
, along with Python and other non-PyPI dependencies. - Consider adding
conda-lock
, which gives you lock files for Conda dependencies, just like you havepoetry.lock
for Poetry dependencies.
QUESTION
Is there any way to declare in Puppet's language that packages in an array should installed in the order they are given in the array?
I want to automate the installation of CUDA, which requires nvidia-driver-latest-dkms
, cuda
and cuda-drivers
(on RHEL7 as an example) to be installed in that order. I do not want to hard-code the array of packages, because I need to support different distributions, which require different packages. Therefore, an array holding the packages provided via Hiera seemed to be a good idea.
My first solution was ensure_packages($packages_parameter_filled_via_hiera)
, which stopped working recently (probably due to changes in NVIDIA's packages). The problem seems to be that this code installs the packages in a random order, and you cannot install nvidia-driver-latest-dkms
(any more) if any of the other packages is already installed.
My next approach,
...ANSWER
Answered 2022-Feb-01 at 16:01Yes, this is actually possible with a "wrapper" defined resource type:
QUESTION
Hi i was deploying a branch on heroku and threw up this error. I also tried deploying a branch which worked perfectly, but that is also showing the same error.
local yarn verion : 1.22.17 local node version : v12.22.7 Please help !!!
Tried building without yarn.lock and package-lock same thing.
This is how it starts Heroku deployment build log through CLI
...ANSWER
Answered 2021-Dec-18 at 14:32I had a similar problem but resolved by following steps.
- Run the following command.
heroku buildpacks:add heroku/nodejs --index 1
- Update node version from
16.x
to12.16.2
in package.json.
QUESTION
You have done it a thousand times: you unplug some USB equipment and any device associated with that USB equipment is removed by the driver. Any program that uses some previously opened file handle will get an error. Somehow most Linux drivers take care of that.
I am currently struggling to implement the same in a simple driver. My driver creates a character device. When the device is opened, I set the private_data
member of struct file
to the address of some management data that exists once per character device. That management data also includes a mutex that I use to synchronize operations like read
, write
, and ioctl
.
The problem now arises when the USB equipment is unplugged. I must not free the memory where that management data lives. First, any currently running read
, write
, or ioctl
should finish. Any such running call will likely also hold a lock on the mutex and will attempt to unlock it. So the memory where the mutex lives will be accessed.
Any read
, write
, or ioctl
call subsequent to unplugging the equipment should fail, so every such call must read some variable telling whether the USB equipment is still plugged in or not. Again, that variable must live somewhere and the memory where it lives must stay allocated as long as there are open file handles.
Long story short, it seems to me that I must do some sort reference counting: The management data must stay allocated until all file handles have been closed. I could implement that myself, but I have the feeling that I would reinvent the wheel. Such a thing must already exist, I'm not the first to have this problem.
Does Linux internally keep track of the number of open file handles? Can I define a callback that is called when all file handles have been closed? Is that even a viable thing? What is the proper way to remove a character device from the system?
Global variables shall not be avoided, since any number of USB devices can be attached.
...ANSWER
Answered 2021-Dec-16 at 22:10As suggested by 0andriy, I have used reference counting to track the number of open file handles. Per character device, I have added a new struct containing a mutex
, a kref
, the cdev
struct, and a pointer to further data. I use kref_get
to increase the reference counter when a new file handle is opened. Accordingly, I use kref_put
when file handles are released or the USB equipment is unplugged.
Since all I/O operations (read
, write
, ioctl
, etc.) use the mutex, I can safely change the pointer to NULL
when the USB equipment is unplugged. The I/O operations then start reporting errors.
The kref
reference counter only returns to zero when the USB equipment is unplugged and all file handles are closed. So then I can also free the memory of the new struct.
This seems to work. It was a surprise that the cdev
struct is referenced by file handles. It seems to be needed as long as there are open file handles.
But I'm still surprised that I had to go down this route. It seems redundant to implement that in every driver.
UPDATE: As it turns out, doing reference counting yourself is dangerous. In particular counting the number of open file handles is wrong. There is a whole reference-count-based garbage collection system in Linux and you need to use it.
For example, Linux calls cdev_get
when a process opens a character device and cdev_put
when the process exists and the file handle is still open. Unfortunately, the call to cdev_put
would occur after the file handle's release function. As we would free the memory after the last file handle has been released, we would end up freeing the underlying memory of the cdev
and the mutex
before cdev_put
is called.
The solution is to assign a parent to the cdev
via cdev_set_parent
. The parent kobject
will have its reference counter increased whenever cdev_get
is called and decreased after cdev_put
is called. The kobject then can have its own release function which frees any memory required by the cdev. Basically I replaced the kref in my struct with a kobject.
Lesson learned: don't do reference counting on your own. Use the existing hierarchy of kobject
s, which is the kernel's way of doing garbage collection.
UPDATE2: It turns out, we reinvented the wheel again. The device
struct includes a release hook, which is called when the internal kobject reached a reference count of zero. This is the mechanism typically used in the kernel to release resources associated with an device - including the device struct itself.
I was looking for a release hook in the cdev
struct. There was none. But it turns out I should have looked one step up in the hierarchy for such a hook.
Long story short: Use cdev_device_add
in combination with the device
release hook. cdev_device_add
will internally call cdev_set_parent
, so the device
becomes the parent of the cdev
. Those are the mechanism other kernel drivers (e.g. evdev) use to release their resources.
QUESTION
Hi guys I need a little help to understand why nvcc is not getting support to my gpu
I have a Nvidia RTX 3090 ti 24GB with this drivers
...ANSWER
Answered 2021-Dec-08 at 16:07In your posted system information, the last line
QUESTION
I am trying to create a vehicle routing problem for multi-drivers with pickup and drop-off locations. The starting point for each driver is their current location and the ending point would be anywhere they end.
The input to my algorithm is a series of lot/long locations. The final output would be the best(shortest) route decided for the driver starting from his location and ending at any location. My actual final output is a route that starts at the driver location and ends at the driver location.
My problem is how can I create the distance matrix while nullifying the end location (the distance from the end node to any other node would be zero).
These are the functions that convert the lat/long locations to distance matrix >>
...ANSWER
Answered 2021-Nov-28 at 11:00Apparently, it is as simple as it is answered in the other question. I added a row of zeros and an additional zero at the start of every row after creating the distance matrix > this will tell the algorithm that the distance between the point at index zero and any other point is 0. And I set my end point data["ends"] = 0
.
So in my case the distance matrix would look like this >>
QUESTION
This was part of another question (Reading URLs from .csv and appending scrape results below previous with Python, BeautifulSoup, Pandas ) which was generously answered by @HedgeHog and contributed to by @QHarr. Now posting this part as a separate question.
In the code below, I'm pasting 3 example source URLs into the code and it works. But I have a long list of URLs (1000+) to scrape and they are stored in a single first column of a .csv file (let's call it 'urls.csv'). I would prefer to read directly from that file.
I think I know the basic structure of 'with open' (e.g. the way @bguest answered it below), but I'm having problems how to link that to the rest of the code, so that the rest continues to work. How can I replace the list of URLs with iterative reading of .csv, so that I'm passing the URLs correctly into the code?
...ANSWER
Answered 2021-Nov-27 at 22:45Since you're using pandas, read_csv
will do the trick for you: https://pandas.pydata.org/docs/reference/api/pandas.read_csv.html
If you want to write it on your own, you could use the built in csv library
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