C code for DS1302 RTC control

IC卡燃气表设计.pdf(73页的论文)----本文设 计了一个以预付为目的的IC卡燃气表。设计的题目来源于和一家苏州燃气表生产企业的项目合作，该项目主要包括IC卡燃气表、IC卡写卡器及售气管理系统三个部分。本人作为开发小组的成员之一，负责了IC卡燃气表的开发工作。-IC card gas meter design. Pdf (73 pages of paper )---- This article is designed for the purpose of a prepaid IC card gas meter. The title comes from the design, and a gas meter manufacturing enterprises in Suzhou project cooperation, the project mainly include IC card gas meter, IC card smart card device and the sale of gas management system in three parts. As a member of the development team is responsible for the IC card gas meter of the development.

Max7219驱动四位数码管LED，用于AVR mega64单片机，已经调试通过。-MAX7219 drives four digital tube LED, used for single-chip AVR mega64 have been debug through.

KEIL的接口函数，对于打算做仿真器的朋友可能有帮助-KEIL interface function, for the intention to make the simulator might be helpful to Friend

经过测试成功的PDIUSBD12与Mega8的连接代码，如有需要，可以下载，从PDISUBD12与S51单片机连接代码修改而来-PDIUSBD12 tested success Mega8 connection with the code, if necessary, can be downloaded from PDISUBD12 connection with the S51 code changes from single-chip microcomputer

是用ATmega162单片机控制1602LCD液晶显示的C语言源代码，包括了显示一个字符或一个字符串的功能-ATmega162 microcontroller is used to control 1602LCD LCD C language source code, including a show or a character string function

该程序是用单片机C51语言编写的关于步进电机控制的程序，里面包含了详细的说明，对于初学者有很好的帮助！

89s51单片机控制的键盘和led系统，键盘送数led从低到高位的显示-89s51 MCU control of the keyboard and led system, the keyboard to send a few led from low to high Show

12864 在51单片机中的程序，用点阵模块改个数组就可以变成自己的了-12864 in MCS-51 in the program, with a change of lattice modules can be turned into its own array of

用于排队叫号系统的中央显示大屏控制程序。可以循环滚动显示文字，最大5层。-Call queuing system for its large central display screen control procedures. Could be re-rolling display text, the largest 5 layer.

93C46/66的读写程序，编译环境Uvision2，4线SPI接口的EEprom芯片的读写-93C46/66 literacy program, compile environment Uvision2, 4-wire SPI interface EEprom chip reader