Electronic code lock design

本程序是用于访问空间大于 64 KB （即：地址指针数大于两个字节）外部扩展随机存取存储器的源程序文件。-the procedures for accessing space is greater than 64 KB (ie : Address indicator greater than 2 bytes) of external expansion of random access memory source files.

在AT89S52上写的一个扫雷程序，显示液晶屏是128*64.-AT89S52 write in a mine-clearing procedures, LCD screen is 128* 64.

NXP P89V51 PGA硬件生成 PWM 程序... -NXP P89V51 PGA hardware to generate PWM process ...

通过环路串口判断串行通信电平转换芯片功能是否正常，并通过读写DRAM 判断硬件。-Through the loop to determine serial communication serial port level translator chip features and whether it is normal, and through reading and writing DRAM hardware judge.

80C52参考频率计程序，包含中断和定时器典型应用代码段-Reference 80C52 Cymometer procedures, including suspension and timer typical application code segment

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串行数码管显示，PCF8563实时时钟芯片使用源程序。在keil环境下编写。-Serial digital tube display, PCF8563 real time clock chip, the use of source code. Keil environment in the preparation.

avr 库函数介绍 对于编程的初学者很重要-avr library function to introduce beginners to programming is very important

这也是MICROCHIP 单片机的C 编译器。 它集成了大部份的函数，使用非常方便。 用于多种PIC 系列单片机-It is C compiler of MICROCHIP single chip.It integrated most of functions,so it is convenient,it is used for kinds of PIC singlechip.

基于51单片机的数字钟，适合与初学者下载-SCM digital clock, suitable for beginners and download