大家有没有做过利用stm32实现2048个点的快速傅里叶变换

1万 · 2018-5-25 16:33

1万 · 2018-5-25 16:37

根据网上现有资料，已经实现了1024个点的快速傅里叶变换，是通过使用ST官方提供的DSP库实现的。

1万 · 2018-5-25 16:43

现在采集回来了2048个点的信息，想对这2048个点做FFT,所以官方的DSP库可能不能实现了，问下大家有没有好的建议。

1万 · 2018-5-25 16:49

arm出的库应该支持吧，就是包含在cmsis中的那个dsp库

1万 · 2018-5-25 16:53

这是我参考网上的写的变换1024个点

#include"stm32_public.h"

#include <math.h>
#include "stm32_dsp.h"

#define NPT 1024
#define PI2 6.28318530717959
#define Fs 46080
long lBufInArray[1024];
long lBufOutArray[1024];
unsigned long lBufMagArray[1024];

void InitBufInArray(void);
void GetPowerMag(void);

/*FFT¿ìËÙ¸µÀïÒ¶±ä»»²âÊÔ³ÌÐò*/
int main(){

      unsigned int i;
      unsigned int p=0;
      RCC_Config();

      power_on_3();             //开3V电源

      GPIO_Configuration();

      USART3_Configuration();

      NVIC_ConfigurationUSART();//中断优先级配置


      InitBufInArray();
      cr4_fft_1024_stm32(lBufOutArray, lBufInArray, NPT);
//       delay_ms(1);

      GetPowerMag();
      printf("i,\t\tP,\t\tMag\r\n");

      for(i=0;i < NPT/2;i++){

            printf("%d\t%d\t%ld\r\n",i,p,lBufMagArray);
            p += 45;
      }
      return 0;



}

/*******************************************************************/
void InitBufInArray()
{
unsigned int i;
float fx;
for(i=0; i<NPT; i++)
{
      fx = 1500 * sin(PI2 * i * 350.0 / Fs) +
         2700 * sin(PI2 * i * 8400.0 / Fs) +
         4000 * sin(PI2 * i * 18725.0 / Fs);
      lBufInArray = ((signed short)fx) << 16;
}
}

//计算各次谐波幅值
//将lBufMagArray分解成实部（X）和虚部（Y），然后计算幅值
void GetPowerMag()
{
int lX,lY;
float X,Y,Mag;
int i;
for(i=0; i<NPT/2; i++)
{
      lX  = (lBufOutArray << 16) >> 16;
      lY  = (lBufOutArray >> 16);
      X = NPT * ((float)lX) / 32768;
      Y = NPT * ((float)lY) / 32768;
      Mag = sqrt(X * X + Y * Y) / NPT;
      if(i == 0)
         lBufMagArray = (unsigned long)(Mag * 32768);
      else
         lBufMagArray = (unsigned long)(Mag * 65536);
}
}

1万 · 2018-5-25 16:57

这是官方提供的DSP库里的东西，我看了下就最大是1024个点

TableFFT_V7
      ;N=16
      DCW 0x4000,0x0000, 0x4000,0x0000, 0x4000,0x0000
      DCW 0xdd5d,0x3b21, 0x22a3,0x187e, 0x0000,0x2d41
      DCW 0xa57e,0x2d41, 0x0000,0x2d41, 0xc000,0x4000
      DCW 0xdd5d,0xe782, 0xdd5d,0x3b21, 0xa57e,0x2d41
      ; N=64
      DCW 0x4000,0x0000, 0x4000,0x0000, 0x4000,0x0000
      DCW 0x2aaa,0x1294, 0x396b,0x0646, 0x3249,0x0c7c
      DCW 0x11a8,0x238e, 0x3249,0x0c7c, 0x22a3,0x187e
      DCW 0xf721,0x3179, 0x2aaa,0x1294, 0x11a8,0x238e
      DCW 0xdd5d,0x3b21, 0x22a3,0x187e, 0x0000,0x2d41
      DCW 0xc695,0x3fb1, 0x1a46,0x1e2b, 0xee58,0x3537
      DCW 0xb4be,0x3ec5, 0x11a8,0x238e, 0xdd5d,0x3b21
      DCW 0xa963,0x3871, 0x08df,0x289a, 0xcdb7,0x3ec5
      DCW 0xa57e,0x2d41, 0x0000,0x2d41, 0xc000,0x4000
      DCW 0xa963,0x1e2b, 0xf721,0x3179, 0xb4be,0x3ec5
      DCW 0xb4be,0x0c7c, 0xee58,0x3537, 0xac61,0x3b21
      DCW 0xc695,0xf9ba, 0xe5ba,0x3871, 0xa73b,0x3537
      DCW 0xdd5d,0xe782, 0xdd5d,0x3b21, 0xa57e,0x2d41
      DCW 0xf721,0xd766, 0xd556,0x3d3f, 0xa73b,0x238e
      DCW 0x11a8,0xcac9, 0xcdb7,0x3ec5, 0xac61,0x187e
      DCW 0x2aaa,0xc2c1, 0xc695,0x3fb1, 0xb4be,0x0c7c
      ; N=256
      DCW 0x4000,0x0000, 0x4000,0x0000, 0x4000,0x0000
      DCW 0x3b1e,0x04b5, 0x3e69,0x0192, 0x3cc8,0x0324
      DCW 0x35eb,0x0964, 0x3cc8,0x0324, 0x396b,0x0646
      DCW 0x306c,0x0e06, 0x3b1e,0x04b5, 0x35eb,0x0964
      DCW 0x2aaa,0x1294, 0x396b,0x0646, 0x3249,0x0c7c
      DCW 0x24ae,0x1709, 0x37af,0x07d6, 0x2e88,0x0f8d
      DCW 0x1e7e,0x1b5d, 0x35eb,0x0964, 0x2aaa,0x1294
      DCW 0x1824,0x1f8c, 0x341e,0x0af1, 0x26b3,0x1590
      DCW 0x11a8,0x238e, 0x3249,0x0c7c, 0x22a3,0x187e
      DCW 0x0b14,0x2760, 0x306c,0x0e06, 0x1e7e,0x1b5d
      DCW 0x0471,0x2afb, 0x2e88,0x0f8d, 0x1a46,0x1e2b
      DCW 0xfdc7,0x2e5a, 0x2c9d,0x1112, 0x15fe,0x20e7
      DCW 0xf721,0x3179, 0x2aaa,0x1294, 0x11a8,0x238e
      DCW 0xf087,0x3453, 0x28b2,0x1413, 0x0d48,0x2620
      DCW 0xea02,0x36e5, 0x26b3,0x1590, 0x08df,0x289a
      DCW 0xe39c,0x392b, 0x24ae,0x1709, 0x0471,0x2afb
      DCW 0xdd5d,0x3b21, 0x22a3,0x187e, 0x0000,0x2d41
      DCW 0xd74e,0x3cc5, 0x2093,0x19ef, 0xfb8f,0x2f6c
      DCW 0xd178,0x3e15, 0x1e7e,0x1b5d, 0xf721,0x3179
      DCW 0xcbe2,0x3f0f, 0x1c64,0x1cc6, 0xf2b8,0x3368
      DCW 0xc695,0x3fb1, 0x1a46,0x1e2b, 0xee58,0x3537
      DCW 0xc197,0x3ffb, 0x1824,0x1f8c, 0xea02,0x36e5
      DCW 0xbcf0,0x3fec, 0x15fe,0x20e7, 0xe5ba,0x3871
      DCW 0xb8a6,0x3f85, 0x13d5,0x223d, 0xe182,0x39db
      DCW 0xb4be,0x3ec5, 0x11a8,0x238e, 0xdd5d,0x3b21
      DCW 0xb140,0x3daf, 0x0f79,0x24da, 0xd94d,0x3c42
      DCW 0xae2e,0x3c42, 0x0d48,0x2620, 0xd556,0x3d3f
      DCW 0xab8e,0x3a82, 0x0b14,0x2760, 0xd178,0x3e15
      DCW 0xa963,0x3871, 0x08df,0x289a, 0xcdb7,0x3ec5
      DCW 0xa7b1,0x3612, 0x06a9,0x29ce, 0xca15,0x3f4f
      DCW 0xa678,0x3368, 0x0471,0x2afb, 0xc695,0x3fb1
      DCW 0xa5bc,0x3076, 0x0239,0x2c21, 0xc338,0x3fec
      DCW 0xa57e,0x2d41, 0x0000,0x2d41, 0xc000,0x4000
      DCW 0xa5bc,0x29ce, 0xfdc7,0x2e5a, 0xbcf0,0x3fec
      DCW 0xa678,0x2620, 0xfb8f,0x2f6c, 0xba09,0x3fb1
      DCW 0xa7b1,0x223d, 0xf957,0x3076, 0xb74d,0x3f4f
      DCW 0xa963,0x1e2b, 0xf721,0x3179, 0xb4be,0x3ec5
      DCW 0xab8e,0x19ef, 0xf4ec,0x3274, 0xb25e,0x3e15
      DCW 0xae2e,0x1590, 0xf2b8,0x3368, 0xb02d,0x3d3f
      DCW 0xb140,0x1112, 0xf087,0x3453, 0xae2e,0x3c42
      DCW 0xb4be,0x0c7c, 0xee58,0x3537, 0xac61,0x3b21
      DCW 0xb8a6,0x07d6, 0xec2b,0x3612, 0xaac8,0x39db
      DCW 0xbcf0,0x0324, 0xea02,0x36e5, 0xa963,0x3871
      DCW 0xc197,0xfe6e, 0xe7dc,0x37b0, 0xa834,0x36e5
      DCW 0xc695,0xf9ba, 0xe5ba,0x3871, 0xa73b,0x3537
      DCW 0xcbe2,0xf50f, 0xe39c,0x392b, 0xa678,0x3368
      DCW 0xd178,0xf073, 0xe182,0x39db, 0xa5ed,0x3179
      DCW 0xd74e,0xebed, 0xdf6d,0x3a82, 0xa599,0x2f6c
      DCW 0xdd5d,0xe782, 0xdd5d,0x3b21, 0xa57e,0x2d41
      DCW 0xe39c,0xe33a, 0xdb52,0x3bb6, 0xa599,0x2afb
      DCW 0xea02,0xdf19, 0xd94d,0x3c42, 0xa5ed,0x289a
      DCW 0xf087,0xdb26, 0xd74e,0x3cc5, 0xa678,0x2620
      DCW 0xf721,0xd766, 0xd556,0x3d3f, 0xa73b,0x238e
      DCW 0xfdc7,0xd3df, 0xd363,0x3daf, 0xa834,0x20e7
      DCW 0x0471,0xd094, 0xd178,0x3e15, 0xa963,0x1e2b
      DCW 0x0b14,0xcd8c, 0xcf94,0x3e72, 0xaac8,0x1b5d
      DCW 0x11a8,0xcac9, 0xcdb7,0x3ec5, 0xac61,0x187e
      DCW 0x1824,0xc850, 0xcbe2,0x3f0f, 0xae2e,0x1590
      DCW 0x1e7e,0xc625, 0xca15,0x3f4f, 0xb02d,0x1294
      DCW 0x24ae,0xc44a, 0xc851,0x3f85, 0xb25e,0x0f8d
      DCW 0x2aaa,0xc2c1, 0xc695,0x3fb1, 0xb4be,0x0c7c
      DCW 0x306c,0xc18e, 0xc4e2,0x3fd4, 0xb74d,0x0964
      DCW 0x35eb,0xc0b1, 0xc338,0x3fec, 0xba09,0x0646
      DCW 0x3b1e,0xc02c, 0xc197,0x3ffb, 0xbcf0,0x0324
            ; N=1024
      DCW 0x4000,0x0000, 0x4000,0x0000, 0x4000,0x0000
      DCW 0x3ed0,0x012e, 0x3f9b,0x0065, 0x3f36,0x00c9
      DCW 0x3d9a,0x025b, 0x3f36,0x00c9, 0x3e69,0x0192
      DCW 0x3c5f,0x0388, 0x3ed0,0x012e, 0x3d9a,0x025b
      DCW 0x3b1e,0x04b5, 0x3e69,0x0192, 0x3cc8,0x0324
      DCW 0x39d9,0x05e2, 0x3e02,0x01f7, 0x3bf4,0x03ed
      DCW 0x388e,0x070e, 0x3d9a,0x025b, 0x3b1e,0x04b5
      DCW 0x373f,0x0839, 0x3d31,0x02c0, 0x3a46,0x057e
      DCW 0x35eb,0x0964, 0x3cc8,0x0324, 0x396b,0x0646
      DCW 0x3492,0x0a8e, 0x3c5f,0x0388, 0x388e,0x070e
      DCW 0x3334,0x0bb7, 0x3bf4,0x03ed, 0x37af,0x07d6
      DCW 0x31d2,0x0cdf, 0x3b8a,0x0451, 0x36ce,0x089d
      DCW 0x306c,0x0e06, 0x3b1e,0x04b5, 0x35eb,0x0964
      DCW 0x2f02,0x0f2b, 0x3ab2,0x051a, 0x3505,0x0a2b
      DCW 0x2d93,0x1050, 0x3a46,0x057e, 0x341e,0x0af1
      DCW 0x2c21,0x1173, 0x39d9,0x05e2, 0x3334,0x0bb7
      DCW 0x2aaa,0x1294, 0x396b,0x0646, 0x3249,0x0c7c
      DCW 0x2931,0x13b4, 0x38fd,0x06aa, 0x315b,0x0d41
      DCW 0x27b3,0x14d2, 0x388e,0x070e, 0x306c,0x0e06
      DCW 0x2632,0x15ee, 0x381f,0x0772, 0x2f7b,0x0eca
      DCW 0x24ae,0x1709, 0x37af,0x07d6, 0x2e88,0x0f8d
      DCW 0x2326,0x1821, 0x373f,0x0839, 0x2d93,0x1050
      DCW 0x219c,0x1937, 0x36ce,0x089d, 0x2c9d,0x1112
      DCW 0x200e,0x1a4b, 0x365d,0x0901, 0x2ba4,0x11d3
      DCW 0x1e7e,0x1b5d, 0x35eb,0x0964, 0x2aaa,0x1294
      DCW 0x1ceb,0x1c6c, 0x3578,0x09c7, 0x29af,0x1354
      DCW 0x1b56,0x1d79, 0x3505,0x0a2b, 0x28b2,0x1413
      DCW 0x19be,0x1e84, 0x3492,0x0a8e, 0x27b3,0x14d2
      DCW 0x1824,0x1f8c, 0x341e,0x0af1, 0x26b3,0x1590
      DCW 0x1688,0x2091, 0x33a9,0x0b54, 0x25b1,0x164c
      DCW 0x14ea,0x2193, 0x3334,0x0bb7, 0x24ae,0x1709
      DCW 0x134a,0x2292, 0x32bf,0x0c1a, 0x23a9,0x17c4
      DCW 0x11a8,0x238e, 0x3249,0x0c7c, 0x22a3,0x187e
      DCW 0x1005,0x2488, 0x31d2,0x0cdf, 0x219c,0x1937
      DCW 0x0e61,0x257e, 0x315b,0x0d41, 0x2093,0x19ef
      DCW 0x0cbb,0x2671, 0x30e4,0x0da4, 0x1f89,0x1aa7
      DCW 0x0b14,0x2760, 0x306c,0x0e06, 0x1e7e,0x1b5d
      DCW 0x096d,0x284c, 0x2ff4,0x0e68, 0x1d72,0x1c12
      DCW 0x07c4,0x2935, 0x2f7b,0x0eca, 0x1c64,0x1cc6
      DCW 0x061b,0x2a1a, 0x2f02,0x0f2b, 0x1b56,0x1d79
      DCW 0x0471,0x2afb, 0x2e88,0x0f8d, 0x1a46,0x1e2b
      DCW 0x02c7,0x2bd8, 0x2e0e,0x0fee, 0x1935,0x1edc
      DCW 0x011c,0x2cb2, 0x2d93,0x1050, 0x1824,0x1f8c
      DCW 0xff72,0x2d88, 0x2d18,0x10b1, 0x1711,0x203a
      DCW 0xfdc7,0x2e5a, 0x2c9d,0x1112, 0x15fe,0x20e7
      DCW 0xfc1d,0x2f28, 0x2c21,0x1173, 0x14ea,0x2193
      DCW 0xfa73,0x2ff2, 0x2ba4,0x11d3, 0x13d5,0x223d
      DCW 0xf8ca,0x30b8, 0x2b28,0x1234, 0x12bf,0x22e7
      DCW 0xf721,0x3179, 0x2aaa,0x1294, 0x11a8,0x238e
      DCW 0xf579,0x3236, 0x2a2d,0x12f4, 0x1091,0x2435
      DCW 0xf3d2,0x32ef, 0x29af,0x1354, 0x0f79,0x24da
      DCW 0xf22c,0x33a3, 0x2931,0x13b4, 0x0e61,0x257e
      DCW 0xf087,0x3453, 0x28b2,0x1413, 0x0d48,0x2620
      DCW 0xeee3,0x34ff, 0x2833,0x1473, 0x0c2e,0x26c1
      DCW 0xed41,0x35a5, 0x27b3,0x14d2, 0x0b14,0x2760
      DCW 0xeba1,0x3648, 0x2733,0x1531, 0x09fa,0x27fe
      DCW 0xea02,0x36e5, 0x26b3,0x1590, 0x08df,0x289a
      DCW 0xe865,0x377e, 0x2632,0x15ee, 0x07c4,0x2935
      DCW 0xe6cb,0x3812, 0x25b1,0x164c, 0x06a9,0x29ce
      DCW 0xe532,0x38a1, 0x252f,0x16ab, 0x058d,0x2a65
      DCW 0xe39c,0x392b, 0x24ae,0x1709, 0x0471,0x2afb
      DCW 0xe208,0x39b0, 0x242b,0x1766, 0x0355,0x2b8f
      DCW 0xe077,0x3a30, 0x23a9,0x17c4, 0x0239,0x2c21
      DCW 0xdee9,0x3aab, 0x2326,0x1821, 0x011c,0x2cb2
      DCW 0xdd5d,0x3b21, 0x22a3,0x187e, 0x0000,0x2d41
      DCW 0xdbd5,0x3b92, 0x221f,0x18db, 0xfee4,0x2dcf
      DCW 0xda4f,0x3bfd, 0x219c,0x1937, 0xfdc7,0x2e5a
      DCW 0xd8cd,0x3c64, 0x2117,0x1993, 0xfcab,0x2ee4
      DCW 0xd74e,0x3cc5, 0x2093,0x19ef, 0xfb8f,0x2f6c
      DCW 0xd5d3,0x3d21, 0x200e,0x1a4b, 0xfa73,0x2ff2
      DCW 0xd45c,0x3d78, 0x1f89,0x1aa7, 0xf957,0x3076
      DCW 0xd2e8,0x3dc9, 0x1f04,0x1b02, 0xf83c,0x30f9
      DCW 0xd178,0x3e15, 0x1e7e,0x1b5d, 0xf721,0x3179
      DCW 0xd00c,0x3e5c, 0x1df8,0x1bb8, 0xf606,0x31f8
      DCW 0xcea5,0x3e9d, 0x1d72,0x1c12, 0xf4ec,0x3274
      DCW 0xcd41,0x3ed8, 0x1ceb,0x1c6c, 0xf3d2,0x32ef
      DCW 0xcbe2,0x3f0f, 0x1c64,0x1cc6, 0xf2b8,0x3368
      DCW 0xca88,0x3f40, 0x1bdd,0x1d20, 0xf19f,0x33df
      DCW 0xc932,0x3f6b, 0x1b56,0x1d79, 0xf087,0x3453
      DCW 0xc7e1,0x3f91, 0x1ace,0x1dd3, 0xef6f,0x34c6
      DCW 0xc695,0x3fb1, 0x1a46,0x1e2b, 0xee58,0x3537
      DCW 0xc54e,0x3fcc, 0x19be,0x1e84, 0xed41,0x35a5
      DCW 0xc40c,0x3fe1, 0x1935,0x1edc, 0xec2b,0x3612
      DCW 0xc2cf,0x3ff1, 0x18ad,0x1f34, 0xeb16,0x367d
      DCW 0xc197,0x3ffb, 0x1824,0x1f8c, 0xea02,0x36e5
      DCW 0xc065,0x4000, 0x179b,0x1fe3, 0xe8ef,0x374b
      DCW 0xbf38,0x3fff, 0x1711,0x203a, 0xe7dc,0x37b0
      DCW 0xbe11,0x3ff8, 0x1688,0x2091, 0xe6cb,0x3812
      DCW 0xbcf0,0x3fec, 0x15fe,0x20e7, 0xe5ba,0x3871
      DCW 0xbbd4,0x3fdb, 0x1574,0x213d, 0xe4aa,0x38cf
      DCW 0xbabf,0x3fc4, 0x14ea,0x2193, 0xe39c,0x392b
      DCW 0xb9af,0x3fa7, 0x145f,0x21e8, 0xe28e,0x3984
      DCW 0xb8a6,0x3f85, 0x13d5,0x223d, 0xe182,0x39db
      DCW 0xb7a2,0x3f5d, 0x134a,0x2292, 0xe077,0x3a30
      DCW 0xb6a5,0x3f30, 0x12bf,0x22e7, 0xdf6d,0x3a82
      DCW 0xb5af,0x3efd, 0x1234,0x233b, 0xde64,0x3ad3
      DCW 0xb4be,0x3ec5, 0x11a8,0x238e, 0xdd5d,0x3b21
      DCW 0xb3d5,0x3e88, 0x111d,0x23e2, 0xdc57,0x3b6d
      DCW 0xb2f2,0x3e45, 0x1091,0x2435, 0xdb52,0x3bb6
      DCW 0xb215,0x3dfc, 0x1005,0x2488, 0xda4f,0x3bfd
      DCW 0xb140,0x3daf, 0x0f79,0x24da, 0xd94d,0x3c42
      DCW 0xb071,0x3d5b, 0x0eed,0x252c, 0xd84d,0x3c85
      DCW 0xafa9,0x3d03, 0x0e61,0x257e, 0xd74e,0x3cc5
      DCW 0xaee8,0x3ca5, 0x0dd4,0x25cf, 0xd651,0x3d03
      DCW 0xae2e,0x3c42, 0x0d48,0x2620, 0xd556,0x3d3f
      DCW 0xad7b,0x3bda, 0x0cbb,0x2671, 0xd45c,0x3d78
      DCW 0xacd0,0x3b6d, 0x0c2e,0x26c1, 0xd363,0x3daf
      DCW 0xac2b,0x3afa, 0x0ba1,0x2711, 0xd26d,0x3de3
      DCW 0xab8e,0x3a82, 0x0b14,0x2760, 0xd178,0x3e15
      DCW 0xaaf8,0x3a06, 0x0a87,0x27af, 0xd085,0x3e45
      DCW 0xaa6a,0x3984, 0x09fa,0x27fe, 0xcf94,0x3e72
      DCW 0xa9e3,0x38fd, 0x096d,0x284c, 0xcea5,0x3e9d
      DCW 0xa963,0x3871, 0x08df,0x289a, 0xcdb7,0x3ec5
      DCW 0xa8eb,0x37e1, 0x0852,0x28e7, 0xcccc,0x3eeb
      DCW 0xa87b,0x374b, 0x07c4,0x2935, 0xcbe2,0x3f0f
      DCW 0xa812,0x36b1, 0x0736,0x2981, 0xcafb,0x3f30
      DCW 0xa7b1,0x3612, 0x06a9,0x29ce, 0xca15,0x3f4f
      DCW 0xa757,0x356e, 0x061b,0x2a1a, 0xc932,0x3f6b
      DCW 0xa705,0x34c6, 0x058d,0x2a65, 0xc851,0x3f85
      DCW 0xa6bb,0x3419, 0x04ff,0x2ab0, 0xc772,0x3f9c
      DCW 0xa678,0x3368, 0x0471,0x2afb, 0xc695,0x3fb1
      DCW 0xa63e,0x32b2, 0x03e3,0x2b45, 0xc5ba,0x3fc4
      DCW 0xa60b,0x31f8, 0x0355,0x2b8f, 0xc4e2,0x3fd4
      DCW 0xa5e0,0x3139, 0x02c7,0x2bd8, 0xc40c,0x3fe1
      DCW 0xa5bc,0x3076, 0x0239,0x2c21, 0xc338,0x3fec
      DCW 0xa5a1,0x2faf, 0x01aa,0x2c6a, 0xc266,0x3ff5
      DCW 0xa58d,0x2ee4, 0x011c,0x2cb2, 0xc197,0x3ffb
      DCW 0xa581,0x2e15, 0x008e,0x2cfa, 0xc0ca,0x3fff
      DCW 0xa57e,0x2d41, 0x0000,0x2d41, 0xc000,0x4000
      DCW 0xa581,0x2c6a, 0xff72,0x2d88, 0xbf38,0x3fff
      DCW 0xa58d,0x2b8f, 0xfee4,0x2dcf, 0xbe73,0x3ffb
      DCW 0xa5a1,0x2ab0, 0xfe56,0x2e15, 0xbdb0,0x3ff5
      DCW 0xa5bc,0x29ce, 0xfdc7,0x2e5a, 0xbcf0,0x3fec
      DCW 0xa5e0,0x28e7, 0xfd39,0x2e9f, 0xbc32,0x3fe1
      DCW 0xa60b,0x27fe, 0xfcab,0x2ee4, 0xbb77,0x3fd4
      DCW 0xa63e,0x2711, 0xfc1d,0x2f28, 0xbabf,0x3fc4
      DCW 0xa678,0x2620, 0xfb8f,0x2f6c, 0xba09,0x3fb1
      DCW 0xa6bb,0x252c, 0xfb01,0x2faf, 0xb956,0x3f9c
      DCW 0xa705,0x2435, 0xfa73,0x2ff2, 0xb8a6,0x3f85
      DCW 0xa757,0x233b, 0xf9e5,0x3034, 0xb7f8,0x3f6b
      DCW 0xa7b1,0x223d, 0xf957,0x3076, 0xb74d,0x3f4f
      DCW 0xa812,0x213d, 0xf8ca,0x30b8, 0xb6a5,0x3f30
      DCW 0xa87b,0x203a, 0xf83c,0x30f9, 0xb600,0x3f0f
      DCW 0xa8eb,0x1f34, 0xf7ae,0x3139, 0xb55e,0x3eeb
      DCW 0xa963,0x1e2b, 0xf721,0x3179, 0xb4be,0x3ec5
      DCW 0xa9e3,0x1d20, 0xf693,0x31b9, 0xb422,0x3e9d
      DCW 0xaa6a,0x1c12, 0xf606,0x31f8, 0xb388,0x3e72
      DCW 0xaaf8,0x1b02, 0xf579,0x3236, 0xb2f2,0x3e45
      DCW 0xab8e,0x19ef, 0xf4ec,0x3274, 0xb25e,0x3e15
      DCW 0xac2b,0x18db, 0xf45f,0x32b2, 0xb1cd,0x3de3
      DCW 0xacd0,0x17c4, 0xf3d2,0x32ef, 0xb140,0x3daf
      DCW 0xad7b,0x16ab, 0xf345,0x332c, 0xb0b5,0x3d78
      DCW 0xae2e,0x1590, 0xf2b8,0x3368, 0xb02d,0x3d3f
      DCW 0xaee8,0x1473, 0xf22c,0x33a3, 0xafa9,0x3d03
      DCW 0xafa9,0x1354, 0xf19f,0x33df, 0xaf28,0x3cc5
      DCW 0xb071,0x1234, 0xf113,0x3419, 0xaea9,0x3c85
      DCW 0xb140,0x1112, 0xf087,0x3453, 0xae2e,0x3c42
      DCW 0xb215,0x0fee, 0xeffb,0x348d, 0xadb6,0x3bfd
      DCW 0xb2f2,0x0eca, 0xef6f,0x34c6, 0xad41,0x3bb6
      DCW 0xb3d5,0x0da4, 0xeee3,0x34ff, 0xacd0,0x3b6d
      DCW 0xb4be,0x0c7c, 0xee58,0x3537, 0xac61,0x3b21
      DCW 0xb5af,0x0b54, 0xedcc,0x356e, 0xabf6,0x3ad3
      DCW 0xb6a5,0x0a2b, 0xed41,0x35a5, 0xab8e,0x3a82
      DCW 0xb7a2,0x0901, 0xecb6,0x35dc, 0xab29,0x3a30
      DCW 0xb8a6,0x07d6, 0xec2b,0x3612, 0xaac8,0x39db
      DCW 0xb9af,0x06aa, 0xeba1,0x3648, 0xaa6a,0x3984
      DCW 0xbabf,0x057e, 0xeb16,0x367d, 0xaa0f,0x392b
      DCW 0xbbd4,0x0451, 0xea8c,0x36b1, 0xa9b7,0x38cf
      DCW 0xbcf0,0x0324, 0xea02,0x36e5, 0xa963,0x3871
      DCW 0xbe11,0x01f7, 0xe978,0x3718, 0xa912,0x3812
      DCW 0xbf38,0x00c9, 0xe8ef,0x374b, 0xa8c5,0x37b0
      DCW 0xc065,0xff9b, 0xe865,0x377e, 0xa87b,0x374b
      DCW 0xc197,0xfe6e, 0xe7dc,0x37b0, 0xa834,0x36e5
      DCW 0xc2cf,0xfd40, 0xe753,0x37e1, 0xa7f1,0x367d
      DCW 0xc40c,0xfc13, 0xe6cb,0x3812, 0xa7b1,0x3612
      DCW 0xc54e,0xfae6, 0xe642,0x3842, 0xa774,0x35a5
      DCW 0xc695,0xf9ba, 0xe5ba,0x3871, 0xa73b,0x3537
      DCW 0xc7e1,0xf88e, 0xe532,0x38a1, 0xa705,0x34c6
      DCW 0xc932,0xf763, 0xe4aa,0x38cf, 0xa6d3,0x3453
      DCW 0xca88,0xf639, 0xe423,0x38fd, 0xa6a4,0x33df
      DCW 0xcbe2,0xf50f, 0xe39c,0x392b, 0xa678,0x3368
      DCW 0xcd41,0xf3e6, 0xe315,0x3958, 0xa650,0x32ef
      DCW 0xcea5,0xf2bf, 0xe28e,0x3984, 0xa62c,0x3274
      DCW 0xd00c,0xf198, 0xe208,0x39b0, 0xa60b,0x31f8
      DCW 0xd178,0xf073, 0xe182,0x39db, 0xa5ed,0x3179
      DCW 0xd2e8,0xef4f, 0xe0fc,0x3a06, 0xa5d3,0x30f9
      DCW 0xd45c,0xee2d, 0xe077,0x3a30, 0xa5bc,0x3076
      DCW 0xd5d3,0xed0c, 0xdff2,0x3a59, 0xa5a9,0x2ff2
      DCW 0xd74e,0xebed, 0xdf6d,0x3a82, 0xa599,0x2f6c
      DCW 0xd8cd,0xeacf, 0xdee9,0x3aab, 0xa58d,0x2ee4
      DCW 0xda4f,0xe9b4, 0xde64,0x3ad3, 0xa585,0x2e5a
      DCW 0xdbd5,0xe89a, 0xdde1,0x3afa, 0xa57f,0x2dcf
      DCW 0xdd5d,0xe782, 0xdd5d,0x3b21, 0xa57e,0x2d41
      DCW 0xdee9,0xe66d, 0xdcda,0x3b47, 0xa57f,0x2cb2
      DCW 0xe077,0xe559, 0xdc57,0x3b6d, 0xa585,0x2c21
      DCW 0xe208,0xe448, 0xdbd5,0x3b92, 0xa58d,0x2b8f
      DCW 0xe39c,0xe33a, 0xdb52,0x3bb6, 0xa599,0x2afb
      DCW 0xe532,0xe22d, 0xdad1,0x3bda, 0xa5a9,0x2a65
      DCW 0xe6cb,0xe124, 0xda4f,0x3bfd, 0xa5bc,0x29ce
      DCW 0xe865,0xe01d, 0xd9ce,0x3c20, 0xa5d3,0x2935
      DCW 0xea02,0xdf19, 0xd94d,0x3c42, 0xa5ed,0x289a
      DCW 0xeba1,0xde18, 0xd8cd,0x3c64, 0xa60b,0x27fe
      DCW 0xed41,0xdd19, 0xd84d,0x3c85, 0xa62c,0x2760
      DCW 0xeee3,0xdc1e, 0xd7cd,0x3ca5, 0xa650,0x26c1
      DCW 0xf087,0xdb26, 0xd74e,0x3cc5, 0xa678,0x2620
      DCW 0xf22c,0xda31, 0xd6cf,0x3ce4, 0xa6a4,0x257e
      DCW 0xf3d2,0xd93f, 0xd651,0x3d03, 0xa6d3,0x24da
      DCW 0xf579,0xd851, 0xd5d3,0x3d21, 0xa705,0x2435
      DCW 0xf721,0xd766, 0xd556,0x3d3f, 0xa73b,0x238e
      DCW 0xf8ca,0xd67f, 0xd4d8,0x3d5b, 0xa774,0x22e7
      DCW 0xfa73,0xd59b, 0xd45c,0x3d78, 0xa7b1,0x223d
      DCW 0xfc1d,0xd4bb, 0xd3df,0x3d93, 0xa7f1,0x2193
      DCW 0xfdc7,0xd3df, 0xd363,0x3daf, 0xa834,0x20e7
      DCW 0xff72,0xd306, 0xd2e8,0x3dc9, 0xa87b,0x203a
      DCW 0x011c,0xd231, 0xd26d,0x3de3, 0xa8c5,0x1f8c
      DCW 0x02c7,0xd161, 0xd1f2,0x3dfc, 0xa912,0x1edc
      DCW 0x0471,0xd094, 0xd178,0x3e15, 0xa963,0x1e2b
      DCW 0x061b,0xcfcc, 0xd0fe,0x3e2d, 0xa9b7,0x1d79
      DCW 0x07c4,0xcf07, 0xd085,0x3e45, 0xaa0f,0x1cc6
      DCW 0x096d,0xce47, 0xd00c,0x3e5c, 0xaa6a,0x1c12
      DCW 0x0b14,0xcd8c, 0xcf94,0x3e72, 0xaac8,0x1b5d
      DCW 0x0cbb,0xccd4, 0xcf1c,0x3e88, 0xab29,0x1aa7
      DCW 0x0e61,0xcc21, 0xcea5,0x3e9d, 0xab8e,0x19ef
      DCW 0x1005,0xcb73, 0xce2e,0x3eb1, 0xabf6,0x1937
      DCW 0x11a8,0xcac9, 0xcdb7,0x3ec5, 0xac61,0x187e
      DCW 0x134a,0xca24, 0xcd41,0x3ed8, 0xacd0,0x17c4
      DCW 0x14ea,0xc983, 0xcccc,0x3eeb, 0xad41,0x1709
      DCW 0x1688,0xc8e8, 0xcc57,0x3efd, 0xadb6,0x164c
      DCW 0x1824,0xc850, 0xcbe2,0x3f0f, 0xae2e,0x1590
      DCW 0x19be,0xc7be, 0xcb6e,0x3f20, 0xaea9,0x14d2
      DCW 0x1b56,0xc731, 0xcafb,0x3f30, 0xaf28,0x1413
      DCW 0x1ceb,0xc6a8, 0xca88,0x3f40, 0xafa9,0x1354
      DCW 0x1e7e,0xc625, 0xca15,0x3f4f, 0xb02d,0x1294
      DCW 0x200e,0xc5a7, 0xc9a3,0x3f5d, 0xb0b5,0x11d3
      DCW 0x219c,0xc52d, 0xc932,0x3f6b, 0xb140,0x1112
      DCW 0x2326,0xc4b9, 0xc8c1,0x3f78, 0xb1cd,0x1050
      DCW 0x24ae,0xc44a, 0xc851,0x3f85, 0xb25e,0x0f8d
      DCW 0x2632,0xc3e0, 0xc7e1,0x3f91, 0xb2f2,0x0eca
      DCW 0x27b3,0xc37b, 0xc772,0x3f9c, 0xb388,0x0e06
      DCW 0x2931,0xc31c, 0xc703,0x3fa7, 0xb422,0x0d41
      DCW 0x2aaa,0xc2c1, 0xc695,0x3fb1, 0xb4be,0x0c7c
      DCW 0x2c21,0xc26d, 0xc627,0x3fbb, 0xb55e,0x0bb7
      DCW 0x2d93,0xc21d, 0xc5ba,0x3fc4, 0xb600,0x0af1
      DCW 0x2f02,0xc1d3, 0xc54e,0x3fcc, 0xb6a5,0x0a2b
      DCW 0x306c,0xc18e, 0xc4e2,0x3fd4, 0xb74d,0x0964
      DCW 0x31d2,0xc14f, 0xc476,0x3fdb, 0xb7f8,0x089d
      DCW 0x3334,0xc115, 0xc40c,0x3fe1, 0xb8a6,0x07d6
      DCW 0x3492,0xc0e0, 0xc3a1,0x3fe7, 0xb956,0x070e
      DCW 0x35eb,0xc0b1, 0xc338,0x3fec, 0xba09,0x0646
      DCW 0x373f,0xc088, 0xc2cf,0x3ff1, 0xbabf,0x057e
      DCW 0x388e,0xc064, 0xc266,0x3ff5, 0xbb77,0x04b5
      DCW 0x39d9,0xc045, 0xc1fe,0x3ff8, 0xbc32,0x03ed
      DCW 0x3b1e,0xc02c, 0xc197,0x3ffb, 0xbcf0,0x0324
      DCW 0x3c5f,0xc019, 0xc130,0x3ffd, 0xbdb0,0x025b
      DCW 0x3d9a,0xc00b, 0xc0ca,0x3fff, 0xbe73,0x0192
      DCW 0x3ed0,0xc003, 0xc065,0x4000, 0xbf38,0x00c9

   END

1万 · 2018-5-25 16:59

楼主，你如果弄懂库的含义， 10240 个点都不是问题。
这里的 FFT 算法开始最早是在ARM7上的。记得源至于美国的大学教授写的一部著作

后来移植到 ARM9 ,ARM9E, CORTEX-MX....

1万 · 2018-5-25 17:02

可惜  他没有写关于 FIR,IIR 等算法的原理及系数如何产生。

IIR 我已经弄懂。  现在剩下FIR算法，NLMS算法的系数产生原理。这些算法非常好玩的。

FFT, IIR, FIR, NLMS 等算法真是很好玩。  这些高森的算法应用到它原本属于的领域。真是太有用处，太好玩了。

2万 · 2018-5-25 17:05

我记得STM32有FFT的库的，直接用库就好了。

2万 · 2018-5-25 17:07

CMSIS里的FFT库好像支持最多4096个点的运算

1万 · 2018-5-25 17:10

结贴了，多谢大家讨论这么多哈，呵呵

只看该作者 · 2018-5-27 18:47

STM32有FFT的库的