#include?“stm32f10x.h“
#include?
#include?“stm32_dsp.h“
#include?“table_fft.h“

#define?PI2??6.28318530717959

#define?NPT?64????????????/*?NPT?=?No?of?FFT?point*/
extern?uint16_t?TableFFT[];
long?lBUFIN[NPT];?????????/*?Complex?input?vector?*/
long?lBUFOUT[NPT];????????/*?Complex?output?vector?*/
long?lBUFMAG[NPT?+?NPT/2];/*?Magnitude?vector?*/

/*?Private?function?prototypes?-----------------------------------------------*/
void?MyDualSweep（uint32_t?freqinc1uint32_t?freqinc2）;
void?MygSin（long?nfill?long?Fs?long?Freq1?long?Freq2?long?Ampli）;
void?powerMag（long?nfill?char*?strPara）;
void?onesided（long?nfill）;

int?main（void）
{

??//DSPDemoInit（）;
??//?Displaytitle（）;

??while?（1）
??{
	MygSin（NPT?64*8?8?0?32767）;
	cr4_fft_64_stm32（lBUFOUT?lBUFIN?NPT）;
	powerMag（NPT“2SIDED“）;
	powerMag（NPT“1SIDED“）;
????MyDualSweep（3030）;
??}
}
void?MyDualSweep（uint32_t?freqinc1uint32_t?freqinc2）
{
??uint32_t?freq;

??for?（freq=40;?freq?<4000;?freq+=freqinc1）
??{
????MygSin（NPT?8000?freq?0?32767）;
????//GPIOC->BSRR?=?GPIO_Pin_7;
????
????cr4_fft_64_stm32（lBUFOUT?lBUFIN?NPT）;

???//?GPIOC->BRR?=?GPIO_Pin_7;
????powerMag（NPT“2SIDED“）;
????//In_displayWaveform（DISPLAY_RIGHT）;

????//displayPowerMag（DISPLAY_RIGHT?9）;

???//?while?（GPIO_ReadInputDataBit（GPIOB?GPIO_Pin_9）?==?0x00）;
??}

??for?（freq=40;?freq?<4000;?freq+=freqinc2）
??{
????MygSin（NPT?8000?freq?160?32767/2）;
????//GPIOC->BSRR?=?GPIO_Pin_7;
????
????cr4_fft_64_stm32（lBUFOUT?lBUFIN?NPT）;
???
????//GPIOC->BRR?=?GPIO_Pin_7;
????powerMag（NPT“2SIDED“）;
????//In_displayWaveform（DISPLAY_LEFT）;
????//displayPowerMag（DISPLAY_LEFT?8）;

????//while?（GPIO_ReadInputDataBit（GPIOB?GPIO_Pin_9）?==?0x00）;
??}

}
void?onesided（long?nfill）
{
??uint32_t?i;
??
??lBUFMAG[0]?=?lBUFMAG[0];
??lBUFMAG[nfill/2]?=?lBUFMAG[nfill/2];
??for?（i=1;?i???{
????lBUFMAG[i]?=?lBUFMAG[i]?+?lBUFMAG[nfill-i];
????lBUFMAG[nfill-i]?=?0x0;
??}
}

/**
??*?@brief??Compute?power?magnitude?of?the?FFT?transform
??*?@param?ill:?length?of?the?array?holding?power?mag
??*???:?strPara:?if?set?to?“1SIDED“?removes?aliases?part?of?spectrum?（not?tested）
??*?@retval?:?None
??*/
void?powerMag（long?nfill?char*?strPara）
{
??int32_t?lXlY;
??uint32_t?i;

??for?（i=0;?i???{
????lX=?（lBUFOUT[i]<<16）>>16;?/*?sine_cosine?-->?cos?*/
????lY=?（lBUFOUT[i]?>>?16）;???/*?sine_cosine?-->?sin?*/????
????{
??????float?X=??64*（（float）lX）/32768;
??????float?Y?=?64*（（float）lY）/32768;
??????float?Mag?=?sqrt（X*X+?Y*Y）/nfill;
??????lBUFMAG[i]?=?（uint32_t）（Mag*65536）;
????}????
??}
??if?（strPara?==?“1SIDED“）?onesided（nfill）;
}

?/**
??*?@brief??Produces?a?combination?of?two?sinewaves?as?input?signal
??*?@param?ill:?length?of?the?array?holding?input?signal
??*???Fs:?sampling?frequency
??*???Freq1:?frequency?of?the?1st?sinewave
??*???Freq2:?frequency?of?the?2nd?sinewave
??*???Ampli:?scaling?factor
??*?@retva

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

????.......????140313??2013-07-12?09:38??firtest.uvgui_dell.bak

????.......?????18229??2013-07-12?17:04??firtest.uvopt

?????文件??????19109??2013-07-10?17:27??firtest.uvproj

?????文件??????15984??2013-07-12?16:06??firtest_Target?1.dep

?????文件???????3153??2013-07-10?15:08??my_fir_filter.s

?????文件????????181??2013-06-14?10:27??saw.ini

?????文件?????126004??2013-07-10?10:31??sine_data.h

?????文件???????3236??2011-06-27?14:20??stm32f10x_conf.h

?????文件???????4481??2011-07-15?16:50??stm32f10x_it.c

?????文件???????3531??2013-07-12?09:40??2sine.h

?????文件????????536??2013-07-11?17:20??analog0.ini

?????文件??????49438??2013-07-12?17:04??Book1.xlsx

?????文件???????1535??2011-07-21?10:34??debugfunc.ini

?????文件???????3469??2011-07-24?10:56??dsptest.c

?????文件??????10967??2013-07-12?09:39??FIR_Filter.c

????.......????142786??2013-07-12?17:04??firtest.uvgui.dell

-----------?---------??----------?-----??----

???????????????542952????????????????????16