用8051控制DDS信号发生器，产生1HZ

As you have learnt that sleep( )/usleep()/nanosleep() are not good to delay a process. Timers can provide more accurate time control in applications. In this lab, you will explore POSIX timers and signal programming, experience the timer drift. The primary focus of this lab will be "time". The experiment will show you several methods to measure time in your applications.

这是我在学校做电子钟留下的资料 希望能给你带来帮助-This is my electronic bell in the school do hope that they will be left behind by the information to help you

液晶显示模块手册中文详细说明，解决英文难懂的问题

使用效果不错而且成本很低很有市场通过本次希望向大家学习-good use of effects and low cost market is through this we hope to learn

protues 仿真的c51单片机走马灯程序,里面包含keil代码,可以与protues共同联机调试.-C51 single-chip simulation protues lantern procedure, which contains keil code, can be shared online debugging protues.

ARM环境使用的SD卡驱动和FAT16文件系统读写源代码-ARM environment for the use of the SD card drive and FAT16 file system to read and write source code

S3C2450_51_16的PCB布线文档，做板子的要看看啦-S3C2450_51_16 the PCB layout files, do the board" s look at看啦

msp430f2274的异步串口通信与lcd1602显示-msp430f2274 asynchronous serial communications and display lcd1602

x5045看门狗芯片51代码，具有看门口功能，和片内EE读写程序-X5045 chip watchdog 51 code, with a look at the entrance features, and EE chip to read and write procedures

Keil C做的8个LED灯循环左移右移-Keil C do eight LED lights cycle bits shifted to the right