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…

The USB (Universal Serial Bus) specification requires a connected USB device to present a load to the host or hub of no greater than 10 µF in parallel with 44Ω, including the effects of any bypass capacitance visible through the device’s voltage regu…

基于Qualcom 8960/8921平台 一,软件分析 1.  USB charger types & Power supply types USB_INVALID_CHARGER              Invalid USB charger. USB_SDP_CHARGER                       Standard downstream port. Refers to a downstream port  on USB2.0 compliant host/hub. U…

为了让当年研究生时写的图像处理系统重出江湖起到更大的作用,应研究生导师的意见,对原有的c++框架做了python扩展处理,为了避免遗忘,备注如下: 一.boost 编译 下载boost源码,这里使用boost 1.67,解压到目录,进行编译 下载C++的boost库:http://www.boost.org/ 安装Anaconda3-5.1.0-Windows-x86_64 默认路径安装 解压boost文件,在其目录中执行.\bootstrap.bat,会生成编译器b2.exe和bjam.exe…

1.enable virtaulization on BIOS 2.new machine setup, memory, harddisk size 3. 4.install extension pack to enable usb 2.0 / 3.0 double click Oracle_VM_VirtualBox_Extension_Pack-5.1.34.vbox-extpack 5.install guest additions CD image to instsall gpu dri…

imx6 usb的host和slave配置,配置之后,安装gadget模块,就能够在host和slave之间切换. 参考文档: i.MX 6Dual/6Quad Linux Reference Manual http://www.cnblogs.com/helloworldtoyou/p/6181860.html 将内核.config文件中下列选项选中(Y),或者编译成模块编译成M. 以下是摘自i.MX 6Dual/6Quad Linux Reference Manual中的内容 Chapter…

source URL: http://stackoverflow.com/questions/2629421/how-to-use-boost-in-visual-studio-2010 While the instructions on the Boost web site are helpful, here is a condensed version that also builds x64 libraries. You only need to do this if you are us…

看了一篇文章<debug by printing>,文中提到了多种通过printk来调试驱动的方法,其中最有用的就是"Dynamic debugging". “Dynamic debugging"的官方文档:http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/dynamic-debug-howto.txt?id=HEAD "Dyanmic de…

Power OFF and ON USB device in linux (ubuntu) http://loginroot.com/power-off-and-on-usb-device-in-linux-ubuntu/ There are two methods of doing this. So first method is for kernels after 2.6.32, and second for older ones. To view kernel version, simpl…

这是悦乐书的第371次更新,第399篇原创 01 看题和准备 今天介绍的是LeetCode算法题中Easy级别的第233题(顺位题号是989).对于非负整数X,X的数组形式是从左到右顺序的数字数组.例如,如果X = 1231,则数组形式为[1,2,3,1]. 给定非负整数X的数组形式A,返回整数X + K的数组形式.例如: 输入:A = [1,2,0,0],K = 34 输出:[1,2,3,4] 说明:1200 + 34 = 1234 输入:A = [2,7,4],K = 181 输出:[4,5…