Tag：routine
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Time：2021-10-8
1. What read write separation \The basic principle of read-write separation is to let the main database handle transactional add, change and delete operations (insert, update and delete), while the select query operation is processed from the database. Database replication is used to synchronize changes caused by transactional operations to slave databases in the cluster.2. Why […]
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Time：2021-10-1
problem In developmentreact-nativeIn the process, usereduxSaving state migration has basically become a standard practice. Changes in the user’s login status will bringreduxState migration, and other parts of the application also need to know whether the user has logged in and relevant login information. As long as the software does not exit, it can be transferred […]
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Time：2021-9-30
Hello, I’m ruffian Heng, a serious technical ruffian. What ruffian Heng shared with you today isi. The flexspi pin group connection of DQS is not supported in mxrt. Precautions for flash download and startup。 Recently, ruffian Heng supported an Indian customer. The main chip of this customer’s project was NXP i.mxrt1176. When designing the board, […]
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Time：2021-9-29
Command introduction The ntpddate command is used to set the date and time using the network timing protocol (NTP). It can also be used to synchronize time. This command can be executed only with root administrator privileges. [[email protected] ~]# ntpdate -bash: ntpdate: command not found [[email protected] ~]# yum install ntpdate -y Syntax format ntpdate [ -b] [ -d] [ -s] [ -u] [ -aKeyid] [ -eAuthenticationDelay] [ -kKeyFile] [ -oVersion] [ -pSamples] [ -tTimeOut] Server… Option description -aKeyid # use Keyid To authenticate all packets […]
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Time：2021-9-21
Hello, I’m ruffian Heng, a serious technical ruffian. What ruffian Heng introduced to you today isMcuxpresso config tools (pins, clocks, peripherals)。 I don’t know if you have such feelings. Now the complexity of MCU chip is getting higher and higher, with hundreds of pins, dazzling clock system, a large number of peripheral registers, and thousands […]
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Time：2021-7-29
Hello, I’m ruffian Heng, a serious technical ruffian. What ruffian Heng introduced to you today isWrite protection, a common factor that causes serial nor flash to fail to download / start normally under i.mxrt。 i. Mxrt Series MCU has been released for more than two years, and there are more and more customer products based […]
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Time：2021-7-28
Lazy loading, also known as code splitting, lets you divide your JavaScript code into multiple chunks. The result is that you do not have to load all the JavaScript of the full application when a user accesses the first page. Instead, only the chunks that are required for the given page are loaded. Lazy loading […]
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Time：2021-7-13
catalogue THP The influence of THP on redis Turn off THP Warning of redis startup log: WARNING you have Transparent Huge Pages (THP) support enabled in your kernel. This will create latency and memory usage issues with Redis. To fix this issue run the command ‘echo madvise > /sys/kernel/mm/transparent_hugepage/enabled’ as root, and add it to […]
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Time：2021-7-6
Routine operation This is a way to configure environment variables by modifying vue.config.js instead of creating a new env file. This can reduce the number of configuration files and root directory files, make the configuration easier to read and modify, and make the directory and code clearer（ It’s all subjective feelings. You are welcome to […]
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Time：2021-5-12
Hello everyone, I’m a ruffian Heng. I’m a serious technical ruffian. What I want to share with you today isImproper system clock configuration will lead to otfad encryption start failure in i.mxrt1xxx series。 We know that the name of the hardware decryption peripheral of the early model of i.mxrt1xxx family (rt1050 / rt0160 / rt1020) […]
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Time：2021-5-5
Hello everyone, I’m a ruffian Heng. I’m a serious technical ruffian. What I want to share with you today isImproper reset of flexspi will cause otfad encryption start failure in i.mxrt series。 This article is aboutImproper configuration of system clock will cause otfad encryption start failure under i.mxrt1xxx seriesAfter we solve the otfad clock configuration […]
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Time：2021-5-3
A series of articles： CSAPP English Learning Series: Preface Chapter 1: a tour of computer systems CSAPP English Learning Series: Chapter 2: data representation Chapter 8: exceptional control flow CSAPP English Learning Series: Chapter 11: network programming CSAPP English Learning Series: Chapter 12: concurrent programming Modern operating systems provide three basic approaches for building concurrent […]
