51单片机简单操作系统源码，其他地方下的，可能拿来分析分析，学习学习...

直接频率合成仿真源程序,希望有人能用到.-Direct frequency synthesizer simulation source code, hope someone can use to.

本方案适用于研究生、本科、大专、职业技术学院的嵌入式系统（单片机/ARM7） 应用、信息通信、应用电子、机电一体化、微机应用、数控技术、自动化控制、计 算机原理与应用、仪表及控制、汽车工程等与“电子/微机/总线”有紧密联系的相关 专业。-The program applies to postgraduate, undergraduate and post-secondary schools, vocational and technical colleges Embedded System (SCM/ARM7) applications, information communications, electronic, electromechanical integration, application of computer, NC technology, automatic control, computer science and application, Instrumentation and Control , automotive engineering, and "electronic/computer/bus" is closely linked to the relevant professional.

单片机智能数显电子表时钟程序,含头文件,说明,本人亲自试过.-Single-chip intelligent digital display electronic watches clock procedures, including the first document, I personally tried.

画曲线头文件,最新制作可以进行画三角波,但可修改后画正玄矩形曲线-Painting curve header files, the latest production of the triangular wave can be painted, but can be modified after the painting is mysterious rectangular curve

基于KeilC的I2C总线实际应用子程序，已作过多个项目-Based on the I2C bus KeilC practical application subroutines, has made a number of projects

SJA1000的驱动函数,can功能函数。-SJA1000 drive function, can function function.

ARM 44b0x的PWM完整源代码,并且已经调试通过-ARM 44b0x PWM complete source code, and debugging has been adopted

16*16的LED点阵显示屏资料，资料中还含有proteus仿真的原理图，可以直接打开仿真成功!-16* 16 LED dot matrix display data, the data also contains simulation Proteus schematic, simulation can be directly opened successfully!

I2C通信的程序，用VHDL写的，可用于FPGA和单片机的通讯。-I2C communication procedures, written with VHDL, FPGA and MCU can be used for communications.

电子秒表的设计 1、用系统8253定时器提供的55ms定时单位，设计秒表定时程序。 2、有关系统定时方法： PC机系统中的8253定时器0工作于方式3，外部提供一个时钟作为CLK信号, 频率：f=1.1931816MHz。 定时器0输出方波的频率:fout=1.1931816/65536=18.2Hz。 输出方波的周期Tout=1/18.2=54.945ms。8253A每隔55ms引起一次中断-Electronic stopwatch design one, using the system timer 8253 provides 55ms timing units, design stopwatch timing procedures. 2, the system timing method: PC system timer 0 of 8253 working in the way of 3, to provide an external clock as the CLK signal, the frequency: f = 1.1931816MHz. Timer 0 output square wave frequency: fout = 1.1931816/65536 = 18.2Hz. Cycle square wave output Tout = 1/18.2 = 54.945ms. 8253A every 55ms caused a disruption