Learning diary - SDIO - SDMMC1 (2020.2.13)

Basic theory of SDMMC SDMMC refers to the host interface of SD, SDIO and MMC cards, providing APB2 peripheral bus multimedia cards (MMCs), digital security memory cards (SD) and SDIO cards. The full name of MMC is "multimedia card" - so it is also commonly called "multimedia card". ...

Posted on Sun, 16 Feb 2020 06:12:25 -0500 by cemzafer

Regular expression: necessary for form validation processing

The common JavaScript regular expressions are collected and sorted out, which is necessary for form validation processing. 1 regular user name //User name regular, 4 to 16 digits (letters, numbers, underscores, minus signs) var uPattern = /^[a-zA-Z0-9_-]{4,16}$/; //Output true console.log(uPattern.test("aim1")); 2 cipher streng ...

Posted on Thu, 13 Feb 2020 13:30:56 -0500 by greenba

pygame alien invasion v1.2 (enhanced version 1)

Optimization over the original game 1. Game background music, launch and collision sound effects 2. Permanent record of maximum score Main module: alien? Investment.py #coding=utf-8 import sys import pygame from pygame.sprite import Group from settings import Settings from game_stats import GameStats fr ...

Posted on Thu, 13 Feb 2020 10:13:15 -0500 by SuprSpy79

Chat application based on flitter

Preface                                  . The author is a web front-end development, and there are inevitably mistakes and omissions rel ...

Posted on Wed, 12 Feb 2020 21:39:34 -0500 by eaglelegend

QCC300x learning notes: Custom HFP AT command

In order to facilitate your study, we are now jointly launching with our love Bluetooth network [QCC300x/CSR867x/QCC30xx/QCC51xx development board]. QQ group no. of technical exchange: 7434463 QQ group number of development board member: 725398389 ———————&mdash ...

Posted on Wed, 12 Feb 2020 09:02:21 -0500 by DeadEvil

python access pin group alarm

Background 1 environment Python 3.7 2. Mail control service (because the company uses zabbix (server infrastructure), elk (business alarm), promethues alertManager (mainly used on k8s), grafana (some data collected by promethues are also reported here, so it is easier to set the alarm here, but th ...

Posted on Wed, 12 Feb 2020 06:43:16 -0500 by Superian

3D Wind Farm Visualization System Based on HTML5+WebGL

Preface Wind energy is a kind of clean energy in development, which is inexhaustible and inexhaustible.Of course, meteorological conditions and social and natural conditions should be considered first in building a wind farm.In recent years, offshore and onshore wind power has developed rapidly in China.Seawater and land provide a good guarante ...

Posted on Tue, 11 Feb 2020 23:08:24 -0500 by Erestar

[Note 5 - shopping cart and address module] independently completed the development of enterprise Java e-commerce website (server side) from 0

Shopping Cart module Database table design Shopping cart Watch CREATE TABLE mmall_ cart ( 'id' int(11) NOT NULL AUTO_ INCREMENT, 'user_ id' int(11) NOT NULL, 'product_ id' int(11) DEFAULT NULL COMMENT ' commodity id', 'quantity' int(11) DEFAULT NULL COMMENT 'Number', 'checked' int(11) DEFAULT NULL COMMENT ' Select or not, 1=Selected,0=Unchecke ...

Posted on Tue, 11 Feb 2020 03:38:01 -0500 by chixsilog

ViewPager calls notifyDataSetChanged() to refresh the solution

1, The cause of the problem Viewpager control to a large extent meets the developer's development page left and right mobile switching function, very convenient to use. However, in use, it is found that when data is deleted or modified, PagerAdapter can't just notify to refresh View through notifyDataSetChanged method like BaseAdapter. A soluti ...

Posted on Tue, 11 Feb 2020 00:42:26 -0500 by a94060

How c++ and others are passed in function parameters, return values, and assignment operations

How classes are passed in function parameters, return values, and assignments Reference material: c++ Copy Constructor Detailed: https://www.cnblogs.com/alantu2018/p/8459250.html C++: Assignment function in class: https://www.cnblogs.com/duwenxing/p/7445927.html C/C++ references as return values f ...

Posted on Mon, 10 Feb 2020 23:47:20 -0500 by rage2021