基于DSP的数字振荡器的设计与实现

Design and Realization of a Digital Osillator Based on DSP

本文阐述了一种基于DSP芯片TMS320C5409的数字振荡器的设计方法,该方法利用TMS320C5409芯片的定时器和中断通过迭代算法设计数字振荡器。本文分别使用TMS320C5409芯片的汇编语言和C语言编程实现数字振荡器产生正弦信号和余弦信号,并通过CCS的虚拟示波器观察所设计的信号波形。该数字振荡器具有实现容易、频率方便修改的特点。

The paper is focused on the design method of a digital oscillator based on the DSP （Digital Signal Processor） chip TMS320C5409. With the interruption and the Timer on a TMS320C5409 chip , the digital oscillator is designed through a iterative arithmetic.The digital oscillator can bring sine signal and cosine signal respectively by the assemble language of the chip TMS320C5409 and C language .The designed signal wave can be observed by a dummy oscillograph on CCS（Code Composer Studio）. The characteristic of the digital oscillator is that it is realized easily and its frequence can be amended expediently.