Recently, I test trickle charging current of the smart phone. It's 0A. ?????????????????????? yes, it's 0A. Scared me. I read some releated pmic spec. The trickle charging mode is fully controlled by hardware. It's not controlled by software. I asked…

The popular USB interface can charge a portable device while transferring data. But for high-capacity batteries, the 500-mA output current of USB hosts and powered hubs greatly extends the charging time. (Unpowered USB hubs supply no more than 100 mA…

adb shell dumpsys,默认打印出当前系统所有的service信息,通常情况下我们并不想看那么多信息,可以在后面加上具体的服务名,比如想获取关于设备电池的信息,就可以使用以下命令: >adb shell dumpsys battery Current Battery Service state: AC powered: false USB powered: true Wireless powered: false Max charging current: 0 status: 5 h…

Most isolated, offline SMPSs (switched-mode power supplies), including flyback, forward, and resonant, must operate at input voltages of 90 to 260V rms. Some cases even use line-to-line voltages of 400V rms±10%, leading to increased component-voltage…

Platform MSM8917 PM8937 PMI8940 Parameters 1 battery charging voltage : qcom,float-voltage-mv = <0x10fe>; 2 battery recharge threshold : qcom,resume-delta-mv = <0xc8>; 3 the max current battery charging current : qcom,fastchg-current-ma = <…

global driver# 元素定位driver.find_element_by_id("id") # id定位driver.find_element_by_name("name") # name定位driver.find_element_by_link_text("text") # 链接名定位driver.find_element_by_partial_link_text("text") # 通过元素部分可见链接文本定位d…

首先驱动需要先获取到2个power supply kernel\msm-3.18\drivers\usb\phy\phy-msm-usb.c motg->usb_psy.name = "usb"; motg->usb_psy.type = POWER_SUPPLY_TYPE_USB; motg->usb_psy.supplied_to = otg_pm_power_supplied_to; motg->usb_psy.num_supplicants = ARRA…

一.背景 从系统架构上来说,Android是基于Linux系统基础上,做了进一步的定制与修改,并融入了自身的特有功能,且向应用层提供应用程序接口,供开发者使用.系统内核层面,主体依然是Linux内核.因此,以往的Linux系统上的开发.使用和经验,在Android系统上很大程度上还是适用的. Android应用程序的开发与运行通常处于不同的设备环境,开发端在开发应用程序的过程中,往往涉及到对应用程序运行时的调试.同时,Android设备在运行过程中,需要有类似于Linux系统本身的一套机制,通过…

adb详细介绍 #1. 基本简介 adb,即Android Debug Bridge,它是Android开发/测试人员不可替代的强大工具 #2. Mac上安装adb 安装brew /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" 安装adb brew install Caskroom/cask/android-platform-tools…

1. Introduction 1.1 Scope 规范定义了设备通过USB端口充电的检测.控制和报告机制,这些机制是USB2.0规范的扩展,用于专用 充电器(DCP).主机(SDP).hub(SDP)和CDP(大电流充电端口)对设备的充电和power up.这些机制适用 于兼容USB2.0的所有主机和外设. 1.2 Background PD(portable device)便携式设备连接到host或hub后,USB2.0协议规定了三种情况下PD汲取电流的最 大值:              …

Engineering labs are usually equipped with various power supplies, voltmeters, function generators, and oscilloscopes. One piece of equipment missing from many such labs, however, is a current source. This omission is unfortunate, because a current s…

In the previous part of the series, we set up basic HTTP authentication on the server by installing the plugin available on GitHub by the WP REST API team. The basic authentication method allows us to send authenticated requests by sending login cred…

转:       http://blog.csdn.net/liglei/article/details/228 1. Introduction 1.1 Scope 规范定义了设备通过USB端口充电的检测.控制和报告机制,这些机制是USB2.0规范的扩展,用于专用 充电器(DCP).主机(SDP).hub(SDP)和CDP(大电流充电端口)对设备的充电和power up.这些机制适用 于兼容USB2.0的所有主机和外设. 1.2 Background PD(portable device)便携式…

转自:http://blog.csdn.net/liglei 转自:http://blog.csdn.net/liglei/article/details/22852755 USB BC1.2有以下三种端口类型为SDP.DCP和CDP SDP: Standard Downstream Port 标准下行接口,此口采用USB 2.0 & USB 3.0的规格定义,且充电电源为: 500mA/USB2.0 900mA/USB3.0 CDP: Charging Downstream Port 充电下行…

ICO (input current optimizer) 手機接上 adapter 後, 手機裡的 charger IC bq25896 開始向 adapter 抽取 current 供給 battery 充電 及 系統消耗,( 這裡的電路圖是假設 adapter 直接接到 charger IC bq25896 ) 每個 adapter 都有其負載能力的限制, 如: 有些可供 5V / 1A, 5V / 2A, 5.2V / 1.5A, .......... 倘若 手機接上 5V / 1A a…

condition 1 :                    adapter 全部電流往 system去,                    battery current 也往 system 去,                    雖然 battery 沒有在 充電                    charging status 並不會顯示 Not Charging                    charging status 而是會顯示 fast charging.…

Monitoring the Battery Level and Charging State PreviousNext This lesson teaches you to Determine the Current Charging State Monitor Changes in Charging State Determine the Current Battery Level Monitor Significant Changes in Battery Level You should…

在Linux下没有Windows使用360那样去限制某个软件的速度. 但是通过Trickle可以设置某个软件的网速,但是前提是通过Trickle命令连带启动这个软件才可以,不能中途去设置. 比如现在很多视频网站都实现了P2P,所以可以在看某个视频时通过Trickle命令启动浏览器来实现限速. 1.安装: sudo apt-get install trickle 2.命令格式 trickle -d download-bandwidth -u upload-bandwidth command 3.命…

Table Of Contents Identity API v3 extensions (CURRENT) OS-ENDPOINT-POLICY API Associate policy and endpoint Verify a policy and endpoint association Delete a policy and endpoint association Associate policy and service-type endpoint Verify a policy a…

Battery Charging Specification Revision 1.2 Li,Guanglei 2014.04.03 Rev0.1 转载请注明转自:http://blog.csdn.net/liglei 1. Introduction  第一章 简介 1.1 Scope    适用范围 规范定义了设备通过USB端口充电的检测.控制和报告机制,这些机制是USB2.0规范的扩展,用于专用充电器(DCP).主机(SDP).hub(SDP)和CDP(大电流充电端口)对设备的充电和powe…

1.场景 在导入通讯录过程中,把导入的失败.成功的号码数进行统计,然后保存到session中,客户端通过轮询显示状态. 在实现过程中,使用的async调用方法,出现HttpContext.Current为null的情况,如下: 2.网络解答 从百度与谷歌查询,分以下两种情况进行解答: 1.更改web.config配置文件 Stackoverflow给出如下解决方案:http://stackoverflow.com/questions/18383923/why-is-httpcontext-cur…

在项目中使用异步(async await)的时候发现一个现象,HttpContext.Current为null,导致一系列的问题. 上网查了一些资料后找到了一个对象: System.Threading.SynchronizationContext (提供在各种同步模型中传播同步上下文的基本功能.), 跟踪代码后发现 SynchronizationContext.Current 返回的是一个叫 System.Web.LegacyAspNetSynchronizationContext 的内部类对象…

描述: 获取依赖关系解析程序的实现. 命名空间: System.Web.Mvc 程序集: System.Web.Mvc(在 System.Web.Mvc.dll 中) 用例: IRecLockService recLockService = DependencyResolver.Current.GetService<IRecLockService>(); IProjectService projectService = DependencyResolver.Current.GetService…

IIS错误提示: The current identity (NT AUTHORITY/NETWORK SERVICE) does not have write access to 'C:/WINDOWS/Microsoft.NET/Framework/v2.0.50727/Temporary ASP.NET Files'. “/”应用程序中的服务器错误. 当前标识(NT AUTHORITY/NETWORK SERVICE)没有对“C:/WINDOWS/Microsoft.NET/Framewo…

http://blog.csdn.net/you23hai45/article/details/50792430 1.错误描述 F:\workspaces\Mybatis>mvn mybatis-genertor:generate [INFO] Scanning for projects... Downloading: https://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven -metadata.xml Downloa…

将Repeater单页显示的2000条数据一次性提交的时候出现这个错误: Operation is not valid due to the current state of the object. Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about…

转至:http://blchen.com/cs0103-the-name-scripts-does-not-exist-in-the-current-context-solution/ 更新:这个bug在ASP.NET MVC 4正式版已经没有了. 今天试玩VS2012里的ASP.NET MVC4,用Controller里用Entity Framework生成模版后,发现页面报错CS0103: The name ‘Scripts’ does not exist in the current co…

http://www.cnblogs.com/tianguook/archive/2010/09/27/1836988.html 自定义 HTTP 处理程序,从IHttpHandler继承,在写System.Web.HttpContext.Current.Session["Value"]的时 候,没有问题,但想将这个Session写到某个变量时或判断是否为空时 如:HttpContext.Current.Session["Value"]==null,发现Sessio…

(App.Current.RootVisual as PhoneApplicationFrame).Navigate(new Uri("/MainPage.xaml", UriKind.Relative));…

为了加强安全性,MySQL5.7为root用户随机生成了一个密码,在error log中,关于error log的位置,如果安装的是RPM包,则默认是/var/log/mysqld.log. 一般可通过log_error设置 mysql> select @@log_error; +---------------------+ | @@log_error | +---------------------+ | /var/log/mysqld.log | +---------------------…