C语言编写的关于51单片机与矩阵式键盘的接口程序

pid的一个例程设计程序，希望对大家有用！-pid a routine design process, in the hope that useful to everybody!

LCD12864的ASCII字库，相关的LCD驱动可以在我发布的其它驱动中找到。-LCD12864 of the ASCII character, the relevant LCD driver can be the other driver I have found.

51单片机控制产生4路标准舵机PWM（周期20ms，脉宽1~2ms,分辨率0.001ms)的代码，含有与PC的通讯功能，通讯严格握手，测试可靠。keil平台开发，包含串口通讯的指令定义和说明-51 single-chip microcomputer to control the steering gear have a 4-way standard PWM (cycle 20ms, pulse width 1 ~ 2ms, resolution of 0.001ms) code, which contains the communication functions with the PC, communications handshake Strict, tested and reliable. keil platform development, including serial communication command definitions and descriptions

一个电子产品开发时的部分c代码C!绝对能用!-When an electronic product development part of c code C! Absolutely can!

对讲机7021 -7021 walkie-talkie walkie-talkie 7021

此程序是用单片机来控制LCD1602的，实现简单的LCD显示，适合初学者学习参考！

基于单片机的波形发生器源代码,可供代价参考交流-Based on single-chip waveform generator source code, available for a price reference to the exchange of

单片机c语言编程的红外线接收程序，为学习单片机和嵌入式开发的同学提供帮助-SCM c language programming procedures for the infrared receiver

S3C2440 arm9芯片上RTC的测试程序，可以测试RTC是否正确运行，以及能对RTC进行时间设置。-RTC chip S3C2440 arm9 test procedures to test whether the RTC correctly, and be able to set the RTC time.

六位电子密码锁 采用89s52（51，52都可），4*4键盘，六个数码管，74ls04（位选），573（8D锁存器）。 说明：P2---数据（接573）―――（接数码管） P1---位选 ---（按74ls04） P0--4*4键盘 密码一次性设置（编程时写入的） 电路简单，此源程序仅供初学者学习，可自行扩展密码模块（加24C02）。 编绎软件为wave -six electronic password lock used 89s52 (can be 51, 52), 4* 4 keyboard, six digital control, 74ls04 (EC), 573 (8D latches). Note : P2-- Data (573 )---( access digital access control) P1 Choice------ (74ls04 ) P0-- 4* 4 keyboard set up a one-time password (into programming) circuit is simple, This program is for beginners learning will be able to expand password module (CO2 plus 24). Sounds series software wave