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TMS320C6678: 主频1.0GHz和主频1.25GHz执行同样数量的FFT操作,耗时没有变化

Part Number: TMS320C6678


主频1.0GHz做了多次FFT操作,把主频调到1.25GHz,执行同样的运算。耗时相同。

主频改动操作:查看SECCTL寄存器对应值,得OUTPUT_DIVIDE =2,PLLM = 4,PLLD = 31.

配置相应的MAINPLLCTL0和MAINPLLCTL1.运行后,查看对应寄存器中的值,确是配置后的结果。烦高手予以指导。