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操作系统开发 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 networ ...
*行业应用 client socket include <sys/types.h> include <sys/socket.h> include <stdio.h> i
client socket
include <sys/types.h>
include <sys/socket.h>
include <stdio.h>
include <netinet/in.h>
include <arpa/inet.h>
include <unistd.h>
int main()
{
int sockfd
int len
struct sockaddr_in address
int result
char ch = A
sockfd = socket(AF_INET, SOCK_STREAM, 0)
address.sin_fami ...
单片机编程 基于DS1991和PIC单片机的智能水卡设计
ＤＳ１９９１是一种多密钥信息纽扣，文章介绍了ＤＳ１９９１的主要特点、工作原理及读写方法。给出了一种基于ＤＳ１９９１和ＰＩＣ单片机的智能水卡设计方案，同时给出了整个系统的硬件组成原理和软件设计方法。
Abstract:
&nbsp;ＤＳ１９９１ ｉｓ ａ ｍｕｌｔｉｋｅｙ ｉＢｕｔｔｏｎ． Ｔｈｅ ｃｈａｒａｃｔｅｒｉ ...
单片机编程 Reading and Writing iButtons v
Abstract: This application note explains the hardware of different types of 1-Wire&reg; interfaces and software examples adapted to this hardware with a focus on serial ports. Depending on the types of iButtons required for a project and the type of computer to be used, the most economical interface ...
教程资料 USB接口控制器参考设计,xilinx提供VHDL代码 us
USB接口控制器参考设计,xilinx提供VHDL代码 usb xilinx vhdl
;&nbsp; This program is free software; you can redistribute it and/or modify
;&nbsp; it under the terms of the GNU General Public License as published by
;&nbsp; the Free Software Foundation; either version 2 of the License, or
;&nbsp; ...
传感与控制 三菱FX系列PLC与计算机无协议通讯
本文主要通过介绍PLC通讯的意义和三菱FX系列PLC的四种通讯方式，并重点介绍FX系列PLC与计算机无协议通讯，主要从无协议通讯的硬件、配线、数据寄存器设置、PLC与计算机无协议通讯的指令用法、PLC程序编写和计算机VB程序的编写来说明无协议通讯的过程和一般方法。
My dissertation introduces the significance of PLC commu ...
可编程逻辑 USB接口控制器参考设计,xilinx提供VHDL代码 us
USB接口控制器参考设计,xilinx提供VHDL代码 usb xilinx vhdl
;&nbsp; This program is free software; you can redistribute it and/or modify
;&nbsp; it under the terms of the GNU General Public License as published by
;&nbsp; the Free Software Foundation; either version 2 of the License, or
;&nbsp; ...
技术资料 DEI 1016 ARINC 429 Transceiver
The DEI 1016 provides an interface between a standard avionics type serial digital data bus and a 16-bit-wide
digital data bus. The interface circuit consists of a single channel transmitter with an 8X32 bit buffer, two inde-
pendent receive channels, and a host programmable control register to se ...
源码 MiniCore
An Arduino core for the ATmega328, ATmega168, ATmega88, ATmega48 and ATmega8, all running a [custom version of Optiboot for increased functionality](#write-to-own-flash). This core requires at least Arduino IDE v1.6.2, where v1.8.5+ is recommended. <br/>
**This core gives you two extra IO pins if yo ...
操作系统开发 linux文件系统试验 一、实验目的 学习有关linux文件管理程序如何组织的知识
linux文件系统试验
一、实验目的
学习有关linux文件管理程序如何组织的知识，为简化的文件系统设计并实现一组目录操作。实验中使用软盘的fat12格式，设计一个程序可以对这种格式的磁盘进行一组目录操作。
实验使用了部分linux的系统调用，比如说open() sleek() read() write()几个调用。通过此实验来对linux的文件系统的 ...