用AVR单片机实现BC7281的键盘控制，学会对7281与键盘的基本应用...

C51只提供长整形除以长整形数据，现已经有函数（经过长期验证）6字节数除以整形数据。-C51 only provide long-divided by a long plastic plastic, are already function (with a long track) 6-byte data divided by plastic.

c51读写SD卡原代码,c51编写,串口接收-C51 source code to read and write SD card, c51 prepared, serial receiver

Verilog实现的DDS正弦信号发生器和测频测相模块，DDS模块可产生两路频率和相位差均可预置调整的值正弦波，频率范围为20Hz-5MHz，相位范围为0°-359°，测量的数据通过引脚传输给单片机，单片机进行计算和显示。-Verilog realize the DDS sine wave signal generator and frequency measurement module test phase, DDS module can generate both frequency and phase difference can be preset to adjust the value of sine wave, frequency range of 20Hz-5MHz, phase range of 0 °-359 ° , measurement data and transmit them to the single-chip pin, single-chip microcomputer to calculate and display.

DS1302 ds18b20时间温度led显示系统源代码，全部都是自己写的，已经通过调试，下载到板子上绝对可用-DS1302 ds18b20 time temperature led display system source code, all written by himself, has passed debugging, downloaded to board can be used in absolute

本系统采用MSC-51系列单片机ATSC51和可编程并行I/O接口芯片8255A为中心器件来设计交通灯控制器，实现了能根据实际车流量通过8051芯片的P1口设置红、绿灯燃亮时间的功能；红绿灯循环点亮，倒计时剩5秒时黄灯闪烁警示（交通灯信号通过PA口输出，显示时间直接通过8255的PC口输出至双位数码管）；车辆闯红灯报警；绿灯时间可检测车流量并可通过双位数码管显示。本系统实用性强、操作简单、扩展功能强。 -The system uses MSC-51 series single-chip ATSC51 and programmable parallel I/O interface chip 8255A-centric device designed to control traffic lights, can be achieved in accordance with the actual traffic flow through the P1 port 8051 chip set red, green fuel Liang function of time traffic light cycle, the countdown five seconds left when the yellow light flashing warning (traffic lights through the PA output signal indicates the time directly through the PC port output 8255 to double-digits) vehicle alarm闯红灯 green time traffic flow can be detected through a double-digital display. The system practical, simple and strong extensions.

高速PCB设计指南,一本很有用的画线路板的书.-High-speed PCB design guidelines, a very useful circuit board painting book.

使用VB编写的上机位的串口控制,我的串口搞定与大家一起分享快乐.上位机是用VB编的. 我想告诉大家是:其实串口通信也不是什么很难的事,只要用心去搞一定能作好的. -VB prepared on the use of machine-bit serial control, serial port I get to share their happiness with you all. PC is VB series. I want to tell you is: In fact, serial communication is not a difficult thing, as long as intentions to engage in will certainly be able to prepare for.

获取Sd卡ID，仅限参考，谢谢合作，也有不足之处请指正-Access to Sd card ID, only a reference, Thank you for your cooperation, but also the inadequacies please correct me

keil8.0的汉化，只是汉化菜单，其帮助文件没有汉化-keil8.0 a Chinese, a Chinese menu only, to help document does not finished

Compal schematic diagram 2