Posted on October 08, 2014 at 06:32
#include ''stm32f4xx.h''
#include ''SSD19h''
#include ''delay.h''
#include ''arm_math.h''
#include ''stdlib.h''
#include ''ts.h''
#include ''main.h''
void dac(float phasevolt);
void EXTI15_10_IRQHandler(void);
float32_t FFT[256]={0};
uint16_t FFTold[128]={0};
float fazenauja=0;
float diodo_spektras[512]={0};
int diodo_spektrasold[130]={0};
float32_t maxValue;
uint8_t maxIndex = 0;
float32_t maxValue2;
uint32_t maxIndex2 = 0;
float PID=0.2;
char stringas[8];
signed int taskas = 7;
float invertacija = 1;
int fftenable=0,diodeV=0;
float vidurkis=0;
int main()
{
Delay2(0xFFFFF);
touch_init();
Delay2(0xFFFFF);
LCD_Init();
Delay2(0xFFFFF);
t();
Delay2(0xFFFFF);
DMA_Config();
Delay2(0xFFFFF);
arm_status status;
arm_cfft_radix4_instance_f32 S;
EXTI_GenerateSWInterrupt(EXTI_Line12);
uint16_t i=0,k=0;
status = arm_cfft_radix4_init_f32(&S, 256, 0, 1);
while(i<
512
)
{
diodo_spektras[i]=0;
i++;
}
i
=
0
;
while(i<130)
{
diodo_spektrasold[i]=0;
i++;
}
while(1)
{
Delay(0xFF);
GPIOB->ODR=0x02;
Delay(20);
GPIOB->ODR=0x03;
Delay(20);
i=0;
k=0;
vidurkis=0;
while(i<
128
)
{
GPIOB->ODR=0x01;
Delay(300);
GPIOB->ODR=0x00;
Delay(200);
diodo_spektras[k]=(float)ADCDualConvertedValue[0];
vidurkis+=(diodo_spektras[k]/128);
k++;
diodo_spektras[k]=0;
k++;
i++;
}
while(k<
512
)
{
diodo_spektras[k]=0;
k++;
}
diodo_spektras[0]=diodo_spektras[4];
diodo_spektras[2]=diodo_spektras[6];
i
=
0
;
if(diodeV==0)
{
while(i<126)
{
LCD_Line(i,228-(diodo_spektrasold[i]/22),i+1,228-(diodo_spektrasold[i+1]/22),BLACK);
LCD_Line(i,228-(int)(diodo_spektras[2*i]/22),i+1,228-(int)(diodo_spektras[2*i+2]/22),YELLOW);
i++;
}
i
=
0
;
while(i<130)
{
diodo_spektrasold[i]=(int)diodo_spektras[2*i];
i++;
}
}
i
=
0
;
/*
while(i<128)
{
diodo_spektras[2*i]=(diodo_spektras[2*i]-vidurkis);
i++;
}
*/
arm_cfft_radix4_f32(&S,diodo_spektras);
fazenauja
= fazenauja-(PID*invertacija*angle(diodo_spektras[taskas*2],diodo_spektras[taskas*2+1]));
dac(fazenauja);
arm_cmplx_mag_f32(diodo_spektras, FFT, 256);
i
=
0
;
/*
maxValue
=
0
;
maxIndex
=
0
;
while(i<127)
{
if(FFT[i]>maxValue)
{
maxValue=FFT[i];
maxIndex=i;
}
i++;
}
maxValue/=186;
sprintf(stringas, ''%d'', maxIndex);
LCD_StringLine(304,10,(u8*) '' '');
LCD_StringLine(304,10,(u8*) stringas);
i=0;
if(fftenable==0)
{
while(i<
126
)
{
LCD_Line(200+2*i,228-FFTold[i],2*i+202,228-FFTold[i+1],BLACK);
LCD_Line(200+2*i,228-(int)(FFT[i]/maxValue),2*i+202,228-(int)(FFT[i+1]/maxValue),BLUE);
i++;
}
i
=
0
;
while(i<130)
{
FFTold[i]=(int)(FFT[i]/maxValue);
i++;
}
LCD_Line(200+taskas*2,30,200+taskas*2,240,RED);
}
LCD_Line(130,30,130,240,BLACK);
LCD_Line(130,136,130,136-(int)(30*angle(diodo_spektras[taskas*2],diodo_spektras[taskas*2+1])),GREEN);
*/
}
}
This code can by your start point, id does work just fine
And this is how you fill array, note that odd numbers are empty, since you don't have imaginary part, only real part, and array is 2x longer than you have samples
diodo_spektras[k]=(float)ADCDualConvertedValue[0];
k++;
diodo_spektras[k]=0;
k++;
