(1) 使用DS18B20制作一个数字温度计，使用数码管交替显示当前温度值和设定温度值； (2) 使用键盘设定某一温度，通过DAC0832输出电压供给发热电...

可编程中断控制器中断控制器8259A是专门为控制优先级中断而设计开发的芯片。它将中断源优先排队、辨别中断源以及提供中断矢量的电路集于一片中。因此无需附加任何电路，只需对8259A进行编程，就可以管理8级中断，并选择优先模式和中断请求方式，即中断结构可以由用户编程来设定。同时，在不需要增加其他电路的情况下，通过多片8259A的级连，能构成多达64级的矢量中断系统-Programmable Interrupt Controller Interrupt Controller 8259A is designed for control and priority interrupt the core design and development tablets. It will interrupt source priority queuing, identifying the source of disruption and the provision of the circuit interrupt vector set in a Chinese. Thus there is no need for any additional circuit, just right for 8259 A programming, it can manage eight interruption, and to choose the mode and priority interrupt request means that the structure can be interrupted by the user to set programming. At the same time, no additional circuit of the other, through more than 8,259 tablets of class A connected, could constitute up to 64 Vector Interrupt System

本文提出一种基于DSP 的SPWM 波形生成新方法―单元脉冲舍入法。产生的SPWM 波经过滤波后转变成的正弦波,具有 频率高、频率范围宽、波形畸变小的特点,可以用做数据通讯的载波,并且已经成功地应用在基于DSP 的软件调制解调器中。-This paper presents a DSP-based SPWM waveform to generate new methods- unit pulse rounding method. SPWM wave generated after filtering through into the sine wave, with high frequency, wide frequency range, waveform distortion of small features, can be used to do data communications carrier and has been successfully used in DSP-based software modems.

大一的 软件实习报告-software internship report

内含有:工资管理系统设计的绪论、管理信息系统研究概述、工资管理系统分析与设计、工资管理系统的功能实现包括有源代码在里面是一个比较完整的一个系统-contain : Salary Management System designed prolegomenon, management information systems research overview, wage management system analysis and design, the wage management system, including the realization of active code inside of a relatively complete system of a

一个小型文本编辑器，该文本编辑器使用VC6.0编写的一个MFC程序，运行后弹出文本编辑器的主界面，由键盘输入后显示文本内容。使其具有一般文本编辑器具有的功能。编辑器具备对当前文本进行输入，换行，统计，撤销，重做，粘贴，查找，匹配等功能。

汇编语言程序设计精华文章-assembly language programming essence of the article

CCNAshiyong教程-CCNAshiyong Guide

vfp初学者的好代码！-Probe beginners a good code!

可以学会作天下所有的菜-the world can learn to make all the dishes

sql源码 可以练习使用sql2000以及入门的使用-sql language