我同事做的一个CS5522的51单片机的驱动,用的是89S52,开发环境是KEIL C...

C51实用源码，极具参考价值！-practical source of C51, great reference value!

单片机测试串口通信程序，使用KEIL　ｃ进行开发，适合初学者学习-microcontroller serial communications testing procedures, the use of KEIL c develop suitable for beginners learning

DESCRIPTION =========== This example project shows how to use the IAR Embedded Workbench for ARM to develop code for the Atmel AT91SAM9261 evaluation boards. It shows basic use of parallel I/O, timer and the interrupt controller. It starts by showing different patterns on the LED s separated by half second. COMPATIBILITY ============= The project is compatible with the AT91SAM9261-EK board.

键盘测试程序，包括显示 、去抖动、扫描、检测，（8051或8031）-keyboard testing procedures, including, to jitter, scanning, detection, (8051 or 8031)

msp430系列芯片资料及其内部结构，引脚资料功能及实例-MSP430 series chip information and its internal structure, function and examples of pin information

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C51很好的IO模拟串口程序，也称软件UART。只需用一个定时器，实现中断接收。程序编写得很规范，有很多个晶振频率和串口频率可选。是一个比较好的软件串口程序。-C51 a good simulation of serial IO program, also known as the software UART. Just use a timer to achieve interrupt reception. Programming very standardized, there are many a crystal oscillator frequency and the frequency of an optional serial port. Is a relatively good software serial programs.

C8051F020单片机的AD测试程序，很好的哦！直接移植便可啦！-C8051F020 MCU AD test procedure, Oh good! Transplant will be able to direct it!

通过编程实现对LCD的驱动，实现能在LCD显示器上显示字符和数字。-Through the programming of the LCD driver, able to realize in the LCD display to show characters and numbers.