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kandi X-RAY | zephyr Summary
Primary Git Repository for the Zephyr Project. Zephyr is a new generation, scalable, optimized, secure RTOS for multiple hardware architectures.
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QUESTION
Given following source code which need to be maintained within a class library project:
...ANSWER
Answered 2021-Jun-04 at 05:45A shared project can be created in Microsoft Visual Studio which acts a central repository that contains the source codes or files.
The project itself doesn't require any references which can then be added as reference for version specific projects.
When open the source code in editor, one can easily switch between the context of referenced projects to make sure everything's good in case there are any conflict due to different dependencies.
The final project structure would then looks similar to:
Product version Project type Newtonsoft.Json version All Shared N/A 1 Class library 10.0.1 2 Class library 11.0.1 3 Class library 12.0.1P/S: This feature has been around for quite some time and I just recently found out about it, hopefully the information provided helps!
Extra: channel 9 video - Sharing Code Across Platforms With Visual Studio 2015
QUESTION
I am building a project and I have the board stm nucleo_l496zg. All i want to do is to use the drivers from the board in order to communicate the board after west flash with minicom, it is a simple string transfer and response program. I am building this project with zephyr and my issue is that I cant use the functions tty_init , tty_read and tty_set_rx_buf despite that I use the proper include " #include "
. The compiler returns an undefined reference to thoose three functions but in my program I am using another one function from tty.h header which is tty_set_timeout but at this function it doesnt say nothing. Though I notiched in that in here(documentation of tty.h) tty_Set_timeout is the only function that has something inside. I cant understand why I am getting that please if someone can help me let me know !
ANSWER
Answered 2021-May-27 at 08:45I had the same problem and I solve it by adding those lines to my .conf file:
QUESTION
I have a task to write a serial driver for uart and tty_uart driver too on Zephyr (It's my first time in developing drivers).
1.So what is the difference between a serial driver and a tty driver?
- Is there any interdependence relation between them? I mean to write a tty driver should I write by first a serial driver, that will be a base to the tty driver or what?
ANSWER
Answered 2021-May-24 at 13:31So what is the difference between a serial driver and a tty driver?
A serial driver makes no assumption about the kind of device attached, it merely sends and receives raw "bytes" (see note), and probably offers some way to configure the communication (which baud rate, how many data bits, what kind of parity scheme, what kind of flow control, etc). The device attached to the serial port could be a serial mouse, or a bar code scanner, or a printer, or ... - the serial driver doesn't care.
Note: "byte" might not be a synonym for "octet" - e.g. it could be a group of 7 bits.
A TTY driver is tied to the assumption that the device is an type writer with a keyboard. Note: For the history; before computers existed we went from "people waving flags at each other" (semaphores) to "morse code with a single key" (telegraph) to teleprinters/teletypewriter (see https://en.wikipedia.org/wiki/Teleprinter ); and when computers got invented the (mechanical/electric) teleprinters were simply replaced with (computerized) dumb terminals.
Mostly; TTY is all about what bytes mean (and doesn't care much how the bytes are sent/received); and a serial driver is all about how bytes are sent/received (and doesn't care what the bytes mean).
Is there any interdependence relation between them? I mean to write a tty driver should I write by first a serial driver, that will be a base to the tty driver or what?
Crudely; a TTY driver has IO in 4 directions - getting key press info from local keyboard, sending bytes to remote whatever, receiving bytes from remote whatever, and putting characters on the local screen. For sending/receiving bytes with "remote whatever" you can use a serial driver; but (especially during development/testing) you could use anything else (TCP/IP stream, pipes, file IO, ...) instead - you don't necessarily need to implement the serial driver first.
QUESTION
I know that polr
does not give p-values because they are not very reliable. Nevertheless, I would like to add them to my modelsummary
(Vignette) output. I know to get the values as follows:
ANSWER
Answered 2021-May-05 at 13:12I think the easiest way to achieve this is to define a tidy_custom.polr
method as described here in the documentation.. For instance, you could do:
QUESTION
I'm doing an assignment in my class with HTML and CSS. I'm having trouble getting the navigation for phone and tablet views to look like the attached image. I'm assuming this could be resolved toward the bottom of the CSS code? Also, my page looks very wide compared to the photos in all views. I'm very much a novice at this if it isn't obvious.
...ANSWER
Answered 2021-Mar-27 at 17:18You were almost there. I found a few typos in your HTML code like the
elements in your unordered lists. After updating the HTML, all that was left was to provide a background color for the containers which hold the nav menu items at mobile and tablet viewport widths (ie the two media queries). I added a stock photo to the background-image
for demonstration.
Lastly, updating your media queries to use px
values instead of em
. As @DCR mentioned, the em
base value may change which in turn would cause your media queries to take affect at varying widths determined by the base value. Everything seems to match the desired output in the images you've included.
If you would like the page content to not exceed a certain viewport width, just specify max-width
on the and center it on the page with
margin: 0 auto
which creates 0 top/bottom margin and "auto" sized left/right margins to center the content. I also added a border
and box-shadow
to the body
at "desktop size" so it matches your desired output.
QUESTION
I have a dynamically generated hero banner that features a title and then body text underneath followed by three action cards that sit just over the bottom portion of the hero banner.
My issue is that whenever there's a hero banner that features longer body text it runs behind the action cards as shown here:
I tried adjusting the margin-bottom for the HeroText but it still just ran behind the cards. I'm trying to adjust the CardRow and the HeroText so that the CardRow pushes down in relation to how much text there is while still overlapping the HeroImage at the bottom but I'm stumped on how to do this.
I've added a CodeSandbox here:
And included all of my code here:
...ANSWER
Answered 2021-Feb-23 at 14:39on debugging the code i found out that the cards have margin property in minus
as you can see the structure.
- the cards wrapper is moved where the dynamic desc is being appended.
- the style: adding
position: relative;
and removing themargin: -(value);
to the same element.
hope this helped.
QUESTION
I want to create three(3) sets of Combobox (Year, Month, Day).
The Combobox Day
should only be enabled until the Combobox Month and Year were filed correctly, and values should be synchronized based on the given month and year. (This means that it should check for leap years).
Here is what I have so far, I have a hint that I should use bindings and/or listeners to do this but struggle to do so.
...ANSWER
Answered 2021-Feb-23 at 08:37With @kleopatra's help. My solution is to create a class responsible for parsing the date selected by the user on the DatePickers default choice box. Furthermore, the date picker is set to editable so that the user can also edit it manually. However, there is a restriction where a user can ONLY insert numerical value when editing manually, also I wanted to make sure that the user should input only valid dates.
MCVEQUESTION
I have a webpage where the css for the small and medium size work and display fine. my problem is with the large, everything is formatted correctly except that the page picture won't display. How do I fix this? Attached is the page layout and the full css. The error should be under the @media(min-width: 1024px)
...ANSWER
Answered 2021-Jan-31 at 21:51From what I understand your image does not appear when the screen size is greater than 1024px. I made some changes to the code and got it to work as you wish, I think ...
I hope that's what you want
QUESTION
Whenever i try the following command to get all files filtered by a date
...ANSWER
Answered 2021-Jan-15 at 18:37It looks like it is doing it's job. Everything there is complying to greater than the specified date.
If you wish to filter by that specific date only, change the -gt (greater than) to -eq (equal) and it should do so.
QUESTION
I am developing a CoAP client on the nRF9160 DK, running Zephyr RTOS. I am having trouble with longer Proxy-URI's; short URIs (268 characters and below) work fine and the coap message reaches the server as expected. However, messages with longer Proxy-URIs (269 characters and above) fail to go through for some reason. For example, with the following initialisation:
...ANSWER
Answered 2021-Jan-09 at 10:26CoAP messages are typically limited by the application's buffer in size, and practically limited to one MTU (as IP fragmentation is rarely used together with CoAP). Unlike the message's payload, an option can not be split across multiple messages using block-wise transfer. On the Zephyr side, the error went unnoticed because you discarded the coap_packet_append_option result code.
For the concrete case of this URI, you can work around the limitation using a larger message buffer (how that is done depends on how you initialized request
in the first place).
Note that transporting a JWT in the URI for authentication purposes is not how authentication is typically done in CoAP applications. If your HTTP server accepts TLS client certificates instead of CWTs, you may consider provisioning the proxy with a suitable client certificate (to be used when the CoAP client is authenticated properly, eg. using DTLS or OSCORE), and then use only the almost reasonably sized token-less path.
[edit after question clarification]
The lack of errors indicates a flaw in the Zephyr code, either Zephyr itself or the concrete network interface used (which should not silently truncate outgoing messages without letting the OS know), and would best be addressed inside the Zephyr issue tracker.
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