4*4矩阵键盘（行扫描法） （S51环境）

This module provides an interface to an alphanumeric display module. The current version of this driver supports any alphanumeric LCD module based on the:Hitachi HD44780 DOT MATRIX LCD controller.

输入所需资源,给出常用代码-bring in the necessary resources, is commonly used code

c8051f020的pca频率输出，针对c8051f020的实验系统-err

摩托罗拉单片机的定时器溢出中断的原代码-Motorola MCU overflow timer interruption of the original code

51单片机经典程序代码，扩展性，实用性极强，能用到各种模块中，热切的欢迎大家下载使用。-Classic 51 Single-chip code, scalable, highly practical, can be used in a variety of modules, fervent welcome to download.

LCD ――HT1621――PIC程序-LCD-- HT1621-- PIC procedure

msp430ex44x试验程序代码包括 io口，spi通信，定时器，实时时钟等代码，非常全-msp430ex44x test program code, including io port, spi communication, timer, real-time clock and other code, is very full

FREESCALE MCF52XX eTPU控制三相电机的程序-eTPU CODE

ds18b20的程序，经过测试可以使用分享一下-DS18B20 procedures tested can use to share

firmware 3.3.4.8 for int6000 powerline