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A user-space device driver can do many of the things that kernel drivers can t, such as perform a lo

A user-space device driver can do many of the things that kernel drivers can t, such as perform a long-running computation, block while waiting for an event, or read files from the file system. Unlike kernel drivers, a user-space device driver can use other device drivers--that is, access the network, talk to a serial port, get interactive input from the user, pop up GUI windows, or read from disks. User-space drivers implemented using FUSD can be much easier to debug it is impossible for them to crash the machine, are easily traceable using tools such as gdb, and can be killed and restarted without rebooting even if they become corrupted. FUSD drivers don t have to be in C--Perl, Python, or any other language that knows how to read from and write to a file descriptor can work with FUSD. User-space drivers can be swapped out, whereas kernel drivers lock physical memory.

標(biāo)簽： user-space can drivers perform

上傳時(shí)間： 2014-01-01

上傳用戶：saharawalker
java 線程靜態(tài)鎖

java 線程靜態(tài)鎖，對(duì)象鎖， synchronized 是鎖方法還是鎖對(duì)象？還是鎖類？如何實(shí)現(xiàn)？？部分代碼如下， public static Object lock=new Object() //靜態(tài)鎖，鎖類，不是鎖對(duì)象了??！所以兩個(gè)線程同時(shí) 運(yùn)行兩個(gè) TestThread 的execute（），也可以同步?。?！ public void execute(){ // synchronized(lock){ for(int i=0 i<20 i++){ try { Thread.sleep(30) } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace() } System.out.println(Thread.currentThread().getName()+Thread.currentThread ().getName()+" "+i) } } }

標(biāo)簽： java 線程

上傳時(shí)間： 2017-07-15

上傳用戶：lijianyu172
TMS320VC5416-DSK-example

A simple example of audio signal processing on TMS320VC5416 USB DSK board. Main source is contained in tone.c file, memory configuration - tonecfg.cmd. Folder docs/ contains useful docmentation on board, its components and libraries. The example's configuration is based on example "tone" from Code Composer Studio's 3.1 example for 5416 DSK.

標(biāo)簽： DSK-example 5416 TMS 320 VC

上傳時(shí)間： 2017-09-29

上傳用戶：wang1104014663
單片機(jī)電子密碼鎖設(shè)計(jì)，內(nèi)含工程文件、源碼文件及電路圖

基于單片機(jī)的密碼鎖設(shè)計(jì)，內(nèi)含工程文件和源碼文件以及電路圖#include "config.h" void main(){ LCD_Initial(); //lcd初始化 init_sys(); //硬件系統(tǒng)初始化 setpsw(); //密碼設(shè)置 while(1) { time=3; //限定嘗試3次 while(1) { inputpsw(); //輸入密碼 checkpsw(); //密碼驗(yàn)證 checksuper(); //驗(yàn)證是否是超級(jí)密碼 if(error_flag==0) {right();break;} else if(time>1) error(); //允許2次嘗試錯(cuò)誤 else {lock();break;} //3次錯(cuò)誤,系統(tǒng)鎖定 } }}

標(biāo)簽： 單片機(jī) 電子密碼鎖

上傳時(shí)間： 2022-07-17

上傳用戶：默默
AM2355n datasheet

3-phase Sensor-less Fan Motor DriverAM2355NThe AM2355N is a 3-phase sensor-less DC fan motor driver IC. It senses the BEMF (BackElectro-Motive Force) of the motor in rotation and provides corresponding commutation current tothe motor. Rotation speed can be controlled by PWM input signal. The drivers include LockDetection, Thermal Shutdown, and Over-current Protection. Forward and Reverse control.www.junmintech.com

標(biāo)簽： am2355n

上傳時(shí)間： 2022-07-26

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