PCB | Dieses Werk ist lizenziert unter einer Creative Commons
kandi X-RAY | PCB Summary
kandi X-RAY | PCB Summary
Dieses Werk ist lizenziert unter einer Creative Commons Namensnennung - Nicht-kommerziell - Weitergabe unter gleichen Bedingungen 4.0 International Lizenz. Bei Nutzung der Platinen freue ich mich über Feedback und kleine Aufmerksamkeiten aus meiner Amazon Wunschliste.
Support
Quality
Security
License
Reuse
Top functions reviewed by kandi - BETA
Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of PCB
PCB Key Features
PCB Examples and Code Snippets
Community Discussions
Trending Discussions on PCB
QUESTION
Currently I'm working with STM32F303ZET6 (with Nucleo development board) in a university project. We also need to make an all SMT PCB including the microcontroller. The problem we have is we can't find SMT verison of STM32F303ZET6 in our country.
So we have to change our microcontroller but currently STM32F303ZET6 is all I got and I'll write all of the code with it. I'm planning to use arm mbed for the libraries and development environment. My question is can I use same codes I wrote for STM32F303ZET6 for some other STM32F3 or STM32F4 microcontroller?
...ANSWER
Answered 2021-May-25 at 19:56There is a great deal of commonality between STM32F2, STM32F3 and STM32F4 series. Both F3 and F4 are Cortex-M4 and all three series share common peripherals. In some cases you may find pin-multiplexing options differ, or there are certain peripherals available in one part but not the other.
Different parts may have a different number of USARTs, ADCs, DACs etc. And differing number of available GPIOs. So you should check that the peripherals and ports you use are available on the alternate part.
It is really a matter of going through the data sheet and comparing the function, capabilities and pin-out options for the parts. If you are using the STM32Cube you should have few compatibility issue (Cube has other issues but cross-part compatibility is its main purpose).
The clock trees for each part tend to differ, so you will need part specific C runtime start-up code, but that is normally provided by the toolchain.
QUESTION
I am new in decoder and FFmpeg. What I need is to implement the logic that can read frames with some step (ex:20), in other words, I have a file and I need to read frames 0, 20, 40, 60...
what I do is
...ANSWER
Answered 2021-May-14 at 14:10You seek 'accurate' to a specific frame... so you seek to the frame that you want with backwards flag to ensure you get the frame or a previous one. If the case is a previous one you decode until you get the actual requested frame.
There are two important steps that I can see that you're missing:-
After each av_seek_frame (demux) and before the next avcodec_send_packet (decode) you need to flush the decoder with avcodec_flush_buffers
After each avcodec_send_packet (decode) you need to receive all frames (can be more than one) with avcodec_receive_frame eg:-
QUESTION
Ok stackoverflow community, don't fail me now. I am wondering if there is a way to automate what I have just done. Essentially I took rows in my big dataframe and put them into smaller ones based on a condition in the taxonomy3 column. Then I took the log_price column and pulled that out to make a series so each one has their own dataframe. Is there a pandas command or anyother command for that matter that allows me to do this?:
...ANSWER
Answered 2021-Apr-22 at 21:00Create a list of values you want to look up and use dictionary comprehension
QUESTION
I am currently learning about simultaneous multi-threading, multi-core and multi-processor scheduling of threads. I checked some information, my understanding is:
If there is a processor that supports simultaneous multi-threading, it turns one physical core into two logical cores. There are two processes, P1 and P2.
- My understanding: In Linux, each process is composed of at least one thread? So scheduling is based on thread scheduling?
P1 and P2 are respectively scheduled to two logical cores. They operate independently. This is the first situation. If there is a process P3, it consists of two threads t1 and t2. Schedule t1 and t2 to different logical cores respectively. So what is the difference between scheduling two different processes to separate logical cores and scheduling different threads in the same process to logical cores?
- My understanding: The process is the smallest unit of the system to allocate resources, and threads share the resources of the process. Threads in a process share virtual memory, PCB, and can access the same data. Therefore, when scheduling different threads in a process and scheduling threads in different processes, there is no difference for the processor. The difference lies in the address translation of the page table and whether the cache can be shared. For a multi-core processor, the processor does not care whether the threads belong to the same process. The consistency of the data is guaranteed by MESI. The physical location of the data is guaranteed by the page table.
Is my understanding correct?
...ANSWER
Answered 2021-Apr-22 at 06:44Right, there's no difference. The kernel just schedules tasks; each user task refers to a page table (whether that's shared with any other task or not).
Each logical CPU core has its own page-table pointer (e.g. x86 CR3).
And yes, cache coherency is maintained by hardware. The Linux kernel's hand-rolled atomics (using volatile
, and inline asm for RMWs and barriers) depend on that.
QUESTION
I am using Symfony 5 and I am trying to make a form that would contain three forms. The first is a Collection of CpuSocket entity, the second is a Collection of ProcessorPlatformType entity based on the CpuSockets chosen by the user, the third is a Collection of Processor entity based on the ProcessorPlatformTypes chosen by the user. To summarize, it's a cascade of CpuSocket−>ProcessorPlatformType->Processors.
Basically I have an entity that's the representation of a motherboard in my database and I want to make it impossible for the user to add CPUs that aren't compatible with the socket(s) chosen and the "platform(s)" that belong to the socket (for instance, if the processor can physically fit in the socket but isn't logic compatible with the motherboard). A motherboard can also have more than one socket and they can be different and multiple different platforms supported (because some motherboards have different sockets on one PCB and some boards are compatible with more CPUs than others). That would also improve the user experience greatly because the CPU list is really long.
A more concrete example is for example: some Socket AM4 motherboard can run a Ryzen 1800x, but won't run a 5800x because they're too old, and some Socket AM4 motherboards won't run a 1800x but will run a 5800x and some may run both. Another example is: Asrock made years ago a motherboard with both a socket 478 and a socket 775 (https://www.asrock.com/mb/Intel/P4%20Combo/)
Reading symfony's documentation I can either get the CpuSocket entity and ProcessorPlatformType entity to work, or the ProcessorPlatformType entity and the Processor entity to work, but not all three together.
I think their examples are great, but they don't go deep enough for this kind of scenario where there is a chain of fields where each depend from another one in cascade
A similar thing (although less complex) would be something like selecting a Country from a list, which will then send you a list of Cities, and once you've chosen a city, you'll get a list of all the Streets in the city.
Here's my code
...ANSWER
Answered 2021-Apr-11 at 23:31I found a solution after weeks of searching, here Symfony2 double nested dynamic form fields
It's made for symfony 2, but the solution works exactly the same for symfony 5 !
QUESTION
I'm trying to scrape the Thingiverse website, more specifically the page displaying a "thing", like this one for example. The problem is that when making a get request (using the python urllib or requests package) the response is an empty HTML file containing a lot of header data, some scripts and an empty react-app div:
...ANSWER
Answered 2021-Apr-05 at 15:45You'll need a browser to render the javascript and then extract the rendered HTML. Try selenium. It lets you manage a browser through your python code and interact with web page elements.
Install selenium:
pip install selenium
Then something like this to extract the HTML
QUESTION
Hello to this wonderful community.
I use a computer with MX Linux as OS. I want to access a device with a serial/UART console (Specifically, the device is a minimal computer made from 74-series ICs. See https://github.com/slu4coder/Minimal-UART-CPU-FLASH-Edition). To connect from the computer to the device, I hardwarewise use a USB-to-UART converter with a (genuine) FTDI FT232RL chip. Softwarewise, I use minicom.
It generally works, but I experience a very specific issue:
The device expects a Linefeed (LF) as newline signal (it says so on its PCB silkscreen). I can't get linux+minicom to send a LF on RETURN or ENTER. It will send a carriage return (CR).
If I connect from my computer to the device via the USB-to-UART converter and start up minicom on my computer, it will show me the device serial console - so far, so good.
But if I type in device commands into minicom and press RETURN or ENTER, the device won't process them.
However, if I use CTRL+J instead of RETURN or ENTER after my command, which gives a LF, it works fine. Equally, it works if I do not use my standard input/keyboard + minicom, but send the command from the bash like this:
echo foo > /dev/ttyUSB0
I have tried to modify my computer/linux behavior with
...ANSWER
Answered 2021-Apr-02 at 14:43According to its manual, minicom
has a CONFIGURATION setup menu with Screen and keyboard, O - Character conversion, C - edit char where you are asked the character value (in decimal) whose conversion you want
to change and you'll be asked what you
want to be sent out when you enter that character from your keyboard. If you specify for value 13 (CR) 10 (NL) to be sent, it should do want you want.
QUESTION
I am trying to extract linkedin url that is written in this format,
...ANSWER
Answered 2021-Mar-23 at 16:16You can use
QUESTION
I am new to SQL, but I am trying to find all the jobs that Monica (applicant A2) has ALL the skills for (which would be Job ID jo3 and j05.)
This is the script I am using in Oracle:
...ANSWER
Answered 2021-Mar-19 at 18:09You need to exclude jobs for which Monica has partial skills.
QUESTION
I am trying to find the jobs location in Dayton that require either database or analysis skills, then ordered by company and job id.
It should be the following:
Database ('s1'): j06, j07, j08, and j10
Analysis ('s7'): j07 and j14
This is the script used for this!!
...ANSWER
Answered 2021-Mar-15 at 04:01You just need to inner join company with job on compid.
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install PCB
Support
Reuse Trending Solutions
Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items
Find more librariesStay Updated
Subscribe to our newsletter for trending solutions and developer bootcamps
Share this Page