开启STM32F4的FPU后对快速傅里叶变换的加速效果  

Acceleration of Fast Fourier Transformation in Enabled FPU of STM32F4

作　　者：赵星[1] 

机构地区：[1]安徽电子科学研究所,安徽合肥230026

出　　处：《工业控制计算机》2021年第8期45-47,共3页Industrial Control Computer

摘　　要：介绍了STM32F4芯片的FPU、ARM CMSIS DSP库及其使用方法,应用STM32F405RGT6芯片对开启和关闭FPU时计算复数FFT和实数FFT进行实验测试,分别使用定时器法和示波器法记录了程序运行时间,结果对比显示出开启FPU对FFT变换具有显著的加速效果,说明了在进行浮点数计算时使用FPU具有重要意义。In this paper,the chip STM32F4's FPU,the library ARM CMSIS DSP and their usages are introduced.STM32F405RGT6 is adopted for experimental testing of FFT of complex and real numbers when enabling or disenabling FPU.The timer and the oscillometer are respectively used to record the runtime of the program.The comparative results suggest that FFT is substantially accelerated when FPU is enabled,demonstrating that FPU is of great significance to the calculation of floating-point numbers.

关 键 词：STM32 FPU 傅里叶变换 DSP 

分 类 号：TN911.6[电子电信—通信与信息系统]