4442逻辑加密IC卡读写底层C51程序，

实现交流220V市电的定时开关，可编程修改各参数，特殊情况下可强行开关。主要用于控制自助打印机系统。-AC 220V City realize the timer switch, programmable modify the parameters, special circumstances may be forced switch. Mainly used to control the printer self-help system.

C51bbs上的字模软件，试用版。做液晶显示必备软件。-C51bbs the Fonts software, beta version. Do LCD necessary software.

通过串口，接收上位机发送的命令，并进行CSI24WC02的读写操作，并返回相应 数据或应答。用汇编实现,可以用keil编译器-through the serial port, the receiving PC to send orders, and CSI24WC02 read and write operations, and return to the corresponding data or response. Assemble realized, can be used Keil compiler

计算光线传输过程中光脉冲的傅里叶变换及反变换算法-Fourier Transformation and Inverse Fourier Transformation

51单片机扩展usb方安 51单片机扩展usb方安-51 Single-chip Single-chip expansion usb Mrs 51 Mrs usb expansion

C51 用PCA 模拟串口，很有参考价值得源码-C51 with PCA serial analog, a valuable source

pic单片机程序,用于数制转换,可将16位二进制数转换成5位十进制数.-pic microcontroller procedures for a number of system conversion, 16 can be converted into binary-decimal number five.

flash程度源代码,该程度经过反复测试,没有问题-the degree of flash source code, the extent of repeated testing, there is no problem

实现单片机对键盘的响应，并进行LCD显示-Realize single-chip microcomputer in response to the keyboard and LCD display

在keil c51 环境下开发时钟秒表源代码-Keil c51 environment in the development of a stopwatch clock source code