硬盘接口线的定义，作单片机的

一个电表的程序，能够直接使用，该芯片使用的是7169，请大家参阅-a meter procedures can directly use, the chip is used in 7169, please refer to

C51编写的用ＩＯ脚模拟串口的源程序,供初学者参考-C51 prepared by serial IO pin analog source, the reference for beginners

功能：利用时钟芯片DS12887在LCD（LCM141）上显示时间，通过4×4键盘来修改时间，利用MAXIM232进行标准串口发送。4×4键盘中有数字键（0～9）和功能键（F1键为“→”，F2键为“←”，F4键为“发送”，设置键为“设置当前时间”，确定键为“把修改的当前时间写入到DS12887相应的存储单元中”）。 硬件：单片机为8K的98C52（ATMEL），LCD为北京青云的LCM141，标准串口总线为MAXIM的232芯片，时钟芯片为DS12887（DALLAS） -Function: the use of clock chip DS12887 in the LCD (LCM141) show time, through the 4 × 4 keyboard to modify the time and using the standard serial port to send MAXIM232. 4 × 4 keyboard in numeric keypad (0 ~ 9) and the function keys (F1 key for the

详细讲解定时器、计数器的内部结构工作原理，控制，工作方式，及初始化编程，应用举例-Elaborate on timers, counters working principle of the internal structure, control, work methods, and initialization programming, applications, for example

单片机中用于相位差测量仪的c程序，开发环境是Iar。主要运用于430 单片机-Single-chip in for the c phase difference measurement procedures, the development environment is Iar. The main application of 430 single-chip microcomputer

LED显示程序，功能：LED16*16点阵滚动显示说明：74LS164用作发送数据，-LED display program, LED16 function:* 16:74LS164 displayed matrix for sending data,

此程序为一排队机呼叫器,主要功能是：用键盘控制液晶显示实现485通讯,具体协议可参考《排队机通讯协议050609.doc》.编译环境为ICC-AVR6.3,采用了ATmega8芯片,晶振速率为6.0000Mhz-Queue for a beeper, the main function is : keyboard control LCD achieve 485 newsletters, reference specific agreement "Queue 050609.doc communication protocol." Build environment for the ICC-AVR6.3 using the ATmega8 chips, crystal rate of 6. 0000Mhz

51单片机开发的等精度数字频率计，实现计数0--51 Single-chip, such as the development of precision digital frequency meter, realize counts 0--

在keil下 的51 简单的os 51_00_OS-Under 51 in keil simple os 51_00_OS

SD卡详细资料,包括SD卡介绍以及接口规范及部分电路连接图-SD card details, including the SD card interface specification and some of the presentations and the circuit connection diagram