基于TMS320F240的FFT实现

Realization of FFT based on TMS320F240

本文利用数字信号处理芯片TMS320F240特有的反序间接寻址来实现FFT运算,重点介绍了采集方式、原理以及由定点实现FFT所引起的数据溢出问题。该方法特别适于信号频谱分析,本文在最后提出了硬件系统的升级方案。

The paper presented the realization of FFT based on TMS320F240 DSP chip with antitone indirect addressing, especially introduced the mode and theory of data acquisition and the data overflow caused by the realization of FFT with fixed point calculation. This method is well suitable for the analysis of signal spectrum. Finally, the update case of the hardware system is given.