基于STM32F103正弦波发生器的设计

Design of Sine Wave Generator Based on STM32F103

介绍了直接数字频率合成DDS的基本工作原理和AD9851模块的内部结构及工作特性,在此基础上,设计了以STM32F103处理器为核心的硬件电路并给出了软件流程。通过STM32F103串行加载频率/相位控制字,使AD9851产生不同频率和相位的信号,利用处理器的ADC模块采集数据,在TFT液晶屏和上位机软件上显示出波形。

Introduction was made to the fundamental principle of direct digital synthesis （DDS）, as well as the internal structure and working characteristics of AD9851. On the basis of this, the hardware circuit taking the processor STM32F103 as the core was designed, the software flow chart given. The AD9851 could produce signals of different frequencies and phases by connecting STM32F103 in series to load frequency or phase control word. The ADC module of the processor was adopted to collect data and the waves displayed on the TFT screen and upper computer software.