等精度频率计，用Xilinx FPGA和51单片机实现

基于单片机准双向I/O的键盘程序基于单片机准双向I/O的键盘程序-Based on single-chip quasi-bidirectional I/O keyboard procedures Singlechip-based quasi-two-way I/O keyboard procedures

用C51编写的源程序清单（由实验板运行通过）包含器件配置文件.闹时启/停子函数.走时函数.定时器T0 5mS初始化.扫描按键子函数.延时子函数等整个工程源代码-with C51 prepared by the source list (from the experimental operation through plate) contains device configuration files. When downtown Kai/stop unreachable. Walking function. T0 5mS initialize the timer. Functions scan button. Functions delay the entire project source code

AD转换芯片max197驱动程序（KeilC51）-AD converter chip max197 Driver (KeilC51)

利用8051单片机驱动蜂鸣器，实现音乐发声功能。-8051 drivers to use buzzers realize music vocal function.

基于89S51的称重系统，ADC0809加LED数码管动态显示-devised based on the weighing system, Connection between ADC 0809 plus digital LED control Dynamic Display

开发板44b0的驱动程序，包括了网卡驱动，实现了FTP、TFTP、UDP以及uclinux-development board 44b0 of the driver, including the driver of the card and realized the FTP, TFTP, UDP and Basis

嵌入式控制器硬件电路设计。里面有介绍各种嵌入式控制器，及其电路设计和软件实现-Embedded controller hardware design. Which have introduced a variety of embedded controllers, and circuit design and software implementation

PWM波程序 可以用来控制电机调速，程序比较简单，这里只用了一个定时器就实现了。因为51单片机没有PWM波的寄存器，所以要自己用软件控制。-PWM waves program can be used to control motor speed, procedure is simple, here only a timer is realized. Because no PWM waves 51-series microcomputer to yourself, so with registers control software.

一个单片机的按键程序。没有使用延时。但是使用其他的方式来达到了延时的目的。-A single-chip key procedures. Do not use the delay. However, the use of other means to achieve the purpose of delay.

网上down的一个电机控制的，据说很吧u错啊，有兴趣可以看下啊。-Down a line of motor control, it is said very错啊it u interested ah can facie.