STM32学习记录20 FFT

其中，数组lBufMagArray存储了各次谐波的幅值。

2.6实验结果

通过串口，我们可以将lBufMagArray数组中各次谐波的幅值（即各个频率分量的幅值）输出打印出来，具体实验数据如下所示：

i,         P,       Mag,         X,         Y0,         0,         4,         0,        -41,       175,        14,        -6,        -42,       350,      1492,       746,        -33,       525,        11,        -5,        -34,       700,         8,        -3,        -35,       875,         8,        -4,        -26,      1050,         6,        -3,         07,      1225,         6,        -3,         08,      1400,         8,        -4,        -29,      1575,         8,        -4,         010,      1750,         4,        -2,         011,      1925,         8,        -4,        -112,      2100,         6,        -3,         013,      2275,         5,        -2,        -214,      2450,         6,        -3,        -115,      2625,         8,        -3,        -316,      2800,         4,        -2,         017,      2975,         6,        -3,        -118,      3150,         6,        -3,         019,      3325,         6,        -3,         020,      3500,         2,        -1,         021,      3675,         4,        -2,         022,      3850,         4,        -2,         023,      4025,         4,        -2,         024,      4200,         6,        -3,         025,      4375,         6,        -3,         026,      4550,         4,        -2,         027,      4725,         6,        -3,         028,      4900,         2,        -1,         029,      5075,         4,        -2,        -130,      5250,         4,        -2,         031,      5425,         2,        -1,         032,      5600,         4,        -2,        -133,      5775,         6,        -3,        -134,      5950,         2,        -1,        -135,      6125,         6,        -3,        -136,      6300,         2,        -1,         037,      6475,         6,        -3,         038,      6650,         4,        -2,         039,      6825,         4,        -2,        -140,      7000,         2,        -1,         041,      7175,         6,        -3,         042,      7350,         2,        -1,         043,      7525,         2,        -1,         044,      7700,         2,        -1,         045,      7875,         2,        -1,         046,      8050,         4,        -2,         047,      8225,         2,        -1,         048,      8400,      2696,      1348,         049,      8575,         2,        -1,        -150,      8750,         0,         0,         051,      8925,         4,        -2,        -152,      9100,         2,         0,        -153,      9275,         0,         0,         054,      9450,         2,        -1,        -155,      9625,         2,        -1,         056,      9800,         2,        -1,         057,      9975,         2,