贴片12路频谱

ID:108715 · 发表于 2016-11-19 13:41

部分源码：

#include <stc12c5a60s2.h>//"stc12c5620ad.h"
#include<intrins.h>
#define LongToBin(n) (((n>>21)&0x80)|((n>>18)&0x40)|((n>>15)&0x20)|((n>>12)&0x10)|((n>>9)&0x08)|((n>>6)&0x04)|((n>>3)&0x02)|((n)&0x01))
#define BIN(n) LongToBin(0x##n##)
#define uchar  unsigned char
#define uint  unsigned int
#define SAMPLE_NUM 64
#define NUM_2_LOG 6
#define FFT_OUT_MIN 1
#define FFT_OUT_MAX 11
uchar code BRTable[SAMPLE_NUM] ={
0, 32, 16, 48, 8, 40, 24, 56,4, 36, 20, 52, 12, 44, 28, 60, 2, 34, 18, 50, 10, 42, 26,
58, 6, 38, 22, 54, 14, 46, 30, 62, 1, 33, 17, 49, 9, 41, 25, 57,5, 37, 21, 53, 13, 45,
29, 61,3, 35, 19, 51, 11, 43, 27, 59,7, 39, 23, 55, 15, 47, 31, 63};
char code sin_tabb[SAMPLE_NUM] = {
0 ,12 ,25 ,37 ,49 ,60 ,71 ,81 ,90 ,98 ,106 ,112 ,117 ,122 ,125 ,126 ,127 ,126 ,125 ,
122 ,117 ,112 ,106 ,98 ,90 ,81 ,71 ,60 ,49 ,37 ,25 ,12 ,0 ,-12 ,-25 ,-37 ,-49 ,-60 ,
-71 ,-81 ,-90 ,-98 ,-106 ,-112 ,-117 ,-122 ,-125 ,-126 ,-127 ,-126 ,-125 ,-122 ,-117
,-112 ,-106 ,-98 ,-90 ,-81 ,-71 ,-60 ,-49 ,-37 ,-25 ,-12  };

char code cos_tabb[SAMPLE_NUM] = {
127 ,126 ,125 ,122 ,117 ,112 ,106 ,98 ,90 ,81 ,71 ,60 ,49 ,37 ,25 ,12 ,0 ,-12 ,-25 ,
-37 ,-49 ,-60 ,-71 ,-81 ,-90 ,-98 ,-106 ,-112 ,-117 ,-122 ,-125 ,-126 ,-127 ,-126 ,-125 ,
-122 ,-117 ,-112 ,-106 ,-98 ,-90 ,-81 ,-71 ,-60 ,-49 ,-37 ,-25 ,-12 ,0 ,12 ,25 ,37 ,49
,60 ,71 ,81 ,90 ,98 ,106 ,112 ,117 ,122 ,125 ,126 };
uchar a[64];
uchar keep,keepnum,anum,timernum,timernum2,lednum3,Ltime;//用于分离

/*加入数组用于显示相应led灯数目*/
uchar lednum[]={0x00,0x01,0x03,0x07,0x0f,0x1f,0x3f,0x7f,0xff};//0-7的显示数组  P2组控制

int xdata FftReal[SAMPLE_NUM];
int xdata FftImage[SAMPLE_NUM];

xdata unsigned char num[128];
xdata unsigned char temp[128];

sbit p37=P3^7;
sbit p36=P3^6;
sbit p35=P3^5;
sbit p34=P3^4;

sbit p07=P0^7;
sbit p06=P0^6;
sbit p05=P0^5;
sbit p04=P0^4;
sbit p03=P0^3;
sbit p02=P0^2;
sbit p01=P0^1;
sbit p00=P0^0;

sbit p27=P2^7;
sbit p26=P2^6;
sbit p25=P2^5;
sbit p24=P2^4;
sbit p23=P2^3;
sbit p22=P2^2;
sbit p21=P2^1;
sbit p20=P2^0;

sbit key=P3^3;
sbit zh=P3^0;

void delay(unsigned char a)
{
unsigned int i;
while(--a)
for(i=0;i<50;i++);
}
void timerinit()//定时器初始化函数
{
   TMOD=0x11;
   TH0=(65536-2048)/256;
   TL0=(65536-2048)%256;

   TH1=(65536-50000)/256;
   TL1=(65536-50000)%256;

   EA=1;
   ET0=1;
   TR0=1;

   ET1=0;
   TR1=0;
}

void FFT_process()    //下落迟滞
{
unsigned char i;
for(i=0;i<14;i++)
{
if(a[i] < temp[i])
{
num[i]++;
if(num[i] == 1)
{
if(temp[0]==0&&temp[1]==0&&temp[2]==0&&temp[3]==0&&temp[4]==0&&temp[5]==0&&temp[6]==0&&temp[7]==0&&temp[8]==0&&temp[9]==0&&temp[10]==0&&temp[11]==0&&temp[12]==0&&temp[13]==0);
else
{
a[i] = --temp[i];
num[i] = 0;
}
}
}
else num[i] = 0;
}
}

void disp()
{
timernum++;
if(timernum==15) timernum=1;
P2=0x00;//显示前先关闭

p37=1;
p36=1;
p35=1;
p34=1;

P0=0Xff;
FFT_process();
switch(timernum)
{
case 1:anum=a[0];break;//
case 2:anum=a[1];break;//
case 3:anum=a[2];p37=0;break;
case 4:anum=a[3];p36=0;break;
case 5:anum=a[4];p35=0;break;
case 6:anum=a[5];p34=0;break;
case 7:anum=a[6];p07=0;break;
case 8:anum=a[7];p06=0;break;
case 9:anum=a[8];p05=0;break;
case 10:anum=a[9];p04=0;break;
case 11:anum=a[10];p03=0;break;
case 12:anum=a[11];p02=0;break;//
case 13:anum=a[12];p01=0;break;//
case 14:anum=a[13];p00=0;break;//
}
P2=lednum[anum];
delay(2);
}

uchar STC_ADC()    //！！根据数据手册写一个ad读取函数
{
   uchar i;
   ADC_RES = 0;
   ADC_RESL  = 0;
   ADC_CONTR = BIN(10001000);
   i=3;
   while(i--);
   while (1)
   {
      if (ADC_CONTR & BIN(10000))
        {
             break;
            }
   }
   ADC_CONTR = BIN(10000000);
       return( ADC_RESL<<2) ;
}
short sqrt_16( unsigned long M)
{
unsigned int N, i;
unsigned long tmp, ttp;
if( M == 0 )
      return 0;

N = 0;

tmp = ( M >> 30 );
M <<= 2;
if( tmp > 1 )
{
      N ++;
      tmp -= N;
}

for( i=15; i>0; i-- )
{
      N <<= 1;

      tmp <<= 2;
      tmp += (M >> 30);

      ttp = N;
      ttp = (ttp<<1)+1;

      M <<= 2;
      if( tmp >= ttp )
      {
         tmp -= ttp;
         N ++;
      }
}

return N;
}
void FFT()
{
register uchar i,bb,j,k,p,max;
register short TR,TI,temp;
unsigned long ulReal;
unsigned long ulImage;

for(i=0; i<SAMPLE_NUM;i++)    //此处可以加入自动增益
{
FftReal[BRTable[i]] = STC_ADC();//使显示保持在一定范围内
      FftImage[i] = 0;
}

for( i=1; i<=NUM_2_LOG; i++)
{
      bb=1;
      bb <<= (i-1);
      for( j=0; j<=bb-1; j++)
      {
         p=1;
         p <<= (NUM_2_LOG-i);
         p = p*j;
         for( k=j; k<SAMPLE_NUM; k=k+2*bb)
         {
            TR = FftReal[k]; TI = FftImage[k]; temp = FftReal[k+bb];
            FftReal[k] = FftReal[k] + ((FftReal[k+bb]*cos_tabb[p])>>7) + ((FftImage[k+bb]*sin_tabb[p])>>7);
            FftImage[k] = FftImage[k] - ((FftReal[k+bb]*sin_tabb[p])>>7) + ((FftImage[k+bb]*cos_tabb[p])>>7);
            FftReal[k+bb] = TR - ((FftReal[k+bb]*cos_tabb[p])>>7) - ((FftImage[k+bb]*sin_tabb[p])>>7);
            FftImage[k+bb] = TI + ((temp*sin_tabb[p])>>7) - ((FftImage[k+bb]*cos_tabb[p])>>7);

            FftReal[k]  >>= 1;
            FftImage[k]  >>= 1;
            FftReal[k+bb]  >>= 1;
            FftImage[k+bb]  >>= 1;
         }
      }
}
max=0;
for( i=0; i<14; i++)
{
      ulReal = FftReal[i+1];
      ulReal *= ulReal;
      ulImage = FftImage[i+1];
      ulImage *= ulImage;

      a[i] = sqrt_16( ulReal + ulImage ); //修改

      if( a[i] < FFT_OUT_MIN ) //
         a[i] = 0;//修改
      else
      a[i] = a[i]-FFT_OUT_MIN;

      if( a[i] >max)
         max =a[i];
}

if(max>8) //11
{
   max/=8;
      for( i=0; i<14; i++) //输出a的5个分离数值
      {
         a[i]/=max;
      }
}
}

void dh1()
{
P0=0XF7;
P2=0X3C;
delay(10);

P0=0XEF;
P2=0X7E;
delay(2);

P0=0XDF;
P2=0X3F;
delay(10);

P0=0XBF;
P2=0X7E;
delay(10);

P0=0X7F;
P2=0X3C;
delay(10);
}

ID:157262 · 发表于 2016-12-23 23:42

好好，谢谢

ID:217550 · 发表于 2017-11-24 16:19

这个不需要加三极管增大驱动能力么？

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