STM32音乐频谱分析仪

Main: #include "led.h" #include "delay.h" #include "key.h" #include "sys.h" #include "lcd.h" #include "usart.h" #include "adc.h" #include "stm32_dsp.h" #include <math.h> /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ #define DOUBLE_COLOR 1 //ÊÇ·ñΪ˫ɫÆÁ£¬ÈôΪ˫ɫÆÁÔò¸ÄΪ1 #define NPT 64 //FFT²ÉÑùµãÊý #define GREEN_STOP_TIME 15 //ÂÌÉ«µã¶¥¶ËÍ£¶Ùʱ¼ä£¬ÖµÔ½´óʱ¼äÔ½³¤ #define GREEN_SUB_SPEED 100 //ÂÌÉ«µãÏÂÒÆËٶȣ¬ÖµÔ½´óËÙ¶ÈÔ½Âý #define RED_SUB_SPEED 50 //ºìɫƵÖùÏòÏÂËõ¶ÌËٶȣ¬ÖµÔ½´óËÙ¶ÈÔ½Âý uint32_t ADC_DataNum=0; //ADC²ÉÑùµãÊý uint32_t RedTime=0; //ºìÉ«µãÏÂÒÆʱ¼ä±äÁ¿ #if DOUBLE_COLOR uint32_t GreenTime=0; //ÂÌÉ«µãÏÂÒÆʱ¼ä±äÁ¿ uint32_t GreenStopTime[32]={0}; //ÂÌÉ«µã¶¥¶ËÍ£¶Ùʱ¼äÊý¾Ý #endif volatile uint8_t ADC_TimeOutFlag=1; //ADC¶¨Ê±²ÉÑùʱ¼äµ½±êÖ¾ extern __IO uint16_t ADCConvertedValue; //ADC²ÉÑùÖµ extern int LCD_COLOR; long lBUFMAG[NPT+NPT/2]; //´æ´¢ÇóÄ£ºóµÄÊý¾Ý long lBUFOUT[NPT];//FFTÊä³öÐòÁÐ long lBUFIN[NPT];//FFTÊäÈëϵÁÐ uint8_t fftHightRedBuf[NPT/2]={0}; //ºìɫƵÖù¸ß¶ÈÊý×é uint8_t DisplayRedDataBuf[32*8]={0}; //ºìÉ«ÏÔʾ»º³åÇø #if DOUBLE_COLOR uint8_t fftHightGreenBuf[NPT/2]={0}; //ÂÌɫƵµã¸ß¶ÈÊý×é uint8_t DisplayGreenDataBuf[32*8]={0}; //ÂÌÉ«ÏÔʾ»º³åÇø #endif u16 color_tab[16]={DARKBLUE,BLUE,LIGHTBLUE,GREEN,LIGHTGREEN,RED,BRED,BRRED,BLACK,YELLOW,CYAN,MAGENTA,GRAYBLUE,LGRAYBLUE,BROWN,LGRAY}; void music_fft_main(uint8_t *RedNewHeight,uint8_t *GreenNewHeight) { int BarWidth = 8; int i=0; int j=0; static uint8_t RedOldHeight[32] = {0}; static uint8_t GreenOldHeight[32] = {0}; for(i=0;i<32;i++) { //Çå³ý֮ǰµÄÂÌÉ«·½¿é //LCD_COLOR = LCD_COLOR_BLACK; LCD_Fill(GreenOldHeight[i],(BarWidth+2)*i,GreenOldHeight[i]+3,(BarWidth+2)*i+BarWidth,WHITE); //ÏÔʾµ±Ç°µÄÂÌÉ«·½¿é LCD_Fill(GreenNewHeight[i],(BarWidth+2)*i,GreenNewHeight[i]+3,(BarWidth+2)*i+BarWidth,color_tab[16-j]); //ÏÔʾºìÉ«Öù if(RedNewHeight[i]>RedOldHeight[i]){//Èç¹ûµ±Ç°µÄÂÌÉ«Öù×Ӹ߶ȱÈ֮ǰµÄ´óÔò²¹ÆëÂÌÉ«Öù×Ó LCD_Fill(RedOldHeight[i],(BarWidth+2)*i,RedNewHeight[i],(BarWidth+2)*i+BarWidth,color_tab[j]); }else{//Èç¹ûµ±Ç°ÏÔʾµÄÂÌÉ«Öù×Ӹ߶ÈСÓÚ֮ǰµÄÖù×ÓÔòÐèÒª½«¶àÓàµÄÂÌÉ«Öù×ÓÓñ³¾°É«Ìî³ä LCD_Fill(RedNewHeight[i],(BarWidth+2)*i,RedOldHeight[i],(BarWidth+2)*i+BarWidth,WHITE); } //½«ÐÂÊý¾Ý±£´æ RedOldHeight[i] = RedNewHeight[i]; GreenOldHeight[i] = GreenNewHeight[i]; if(j>=15) j=0; j++; } } void powerMag(long nfill) { int32_t lX,lY; uint32_t i; for (i=0; i < nfill; 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; // ÏÈƽ·½ºÍ,ÔÙ¿ª·½ lBUFMAG[i] = (long)(Mag*65536); } } } int main(void) {uint32_t i=0; delay_init(); //ÑÓʱº¯Êý³õʼ»¯ NVIC_Configuration(); //ÉèÖÃNVICÖжϷÖ×é2:2λÇÀÕ¼ÓÅÏȼ¶£¬2λÏìÓ¦ÓÅÏȼ¶ uart_init(9600); //´®¿Ú³õʼ»¯Îª9600 LED_Init(); //LED¶Ë¿Ú³õʼ»¯ TIM2_Configuration(); TIM2_NVIC_Configuration(); FFT_RCC_Configuration(); FFT_GPIO_Configuration(); FFT_DMA_Init(); FFT_ADC_Init(); LCD_Init(); // BACK_COLOR=BLACK; TIM_Cmd(TIM2, ENABLE); ADC_SoftwareStartConvCmd(ADC1, DISABLE); while(1) { if(ADC_TimeOutFlag){ #if DOUBLE_COLOR GreenTime++; #endif RedTime++; ADC_TimeOutFlag=0; if(ADC_DataNum<NPT){//²ÉÑùµãûÓдﵽËùÒªÇóµÄµã // ADC1->CR2 |= 0x00500000;// ADC_SoftwareStartConvCmd(ADC1, ENABLE); while(!DMA_GetFlagStatus(DMA1_FLAG_TC1)); /* Clear channel1 transfer complete flag */ DMA_ClearFlag(DMA1_FLAG_TC1); // ADC1->CR2 &= 0xFFAFFFFF;// ADC_SoftwareStartConvCmd(ADC1, DISABLE); lBUFIN[ADC_DataNum]=ADCConvertedValue<<16; ADC_DataNum++; }else{ TIM_Cmd(TIM2, DISABLE); ADC_DataNum=0; cr4_fft_64_stm32(lBUFOUT,lBUFIN,NPT);//µ÷ÓÃSTM32µÄDSP¿â×÷FFT±ä»» powerMag(NPT);//¼ÆËãƵµã·ùÖµ //¸üкìÉ«µãµÄ¸ß¶È for(i=0;i<NPT/2;i++){ if((uint8_t)(lBUFMAG[i])>fftHightRedBuf[i]){ fftHightRedBuf[i]=(lBUFMAG[i]); } #if DOUBLE_COLOR //Ë¢ÐÂÂÌÉ«µã¸ß¶È if(fftHightRedBuf[i]>=fftHightGreenBuf[i]){ fftHightGreenBuf[i]=fftHightRedBuf[i]; GreenStopTime[i]=GREEN_STOP_TIME;//Â̵ãÍ£¶Ùʱ¼ä if(fftHightRedBuf[i]>=235){ fftHightGreenBuf[i]=235; fftHightRedBuf[i]=235; } } #else if(fftHightRedBuf[i]>=239){ fftHightRedBuf[i]=239; } #endif } //ÏÔʾºìÉ«Öù×Ó music_fft_main(fftHightRedBuf,fftHightGreenBuf); //ÏÔʾÂÌÉ«µã #if DOUBLE_COLOR //ÂÌÉ«µãÏÂÒÆ if((GreenTime>GREEN_SUB_SPEED)){ //ÂÌÉ«µãϽµ¼ä¸ôʱ¼ä GreenTime=0; for(i=0;i<NPT/2;i++){ if((fftHightGreenBuf[i]!=0)&&(GreenStopTime[i]==0)){ fftHightGreenBuf[i]--; } } } #endif //ºìÉ«ÏÂÒÆ if(RedTime>RED_SUB_SPEED){ RedTime=0; for(i=0;i<NPT/2;i++){ if((fftHightRedBuf[i]!=0)){ fftHightRedBuf[i]--; } } } //ÂÌÉ«µãÍ£¶Ùʱ¼ä¼õÒ» #if DOUBLE_COLOR for(i=0;i<NPT/2;i++){ if(GreenStopTime[i]!=0){ GreenStopTime[i]--; } } #endif TIM_Cmd(TIM2, ENABLE); } } } } void TIM2_IRQHandler(void) { if(TIM_GetITStatus(TIM2,TIM_IT_Update)==SET){ // TIM2->SR = (uint16_t)~TIM_FLAG_Update; TIM_ClearITPendingBit(TIM2,TIM_FLAG_Update); //ÇåÖÐ¶Ï ADC_TimeOutFlag=1; } }