51单片机及其C语言程序开发实例,介绍了51单片机常用的模块电路设计与实现，主要模块有键盘、LCD显示、A/D转换、D/A转换、I2C总线应用、语音、实时时钟、红外、USB、步进电机、数字锁相环、串口通信、DDS等-51 microcontroller C language program development instance, introduced 51 single-chip module circuit design and implementation of the main mod

ad9833的输出程序，单片机为51.基于DDS算法的输出-ad9833 output program, the microcontroller 51. The output of the algorithm based on DDS

AD9850、AD9851驱动程序，基于51单片机的，程序调试通过，可以移植。-AD9850, AD9851 driver, based on 51 microcontroller, debugging through, can be transplanted.