Diff: main.cpp

Revision:

5:173ae8477ae1

Parent:

4:397e8f4699df

Child:

6:0de27f5ec409

--- a/main.cpp	Thu Oct 23 15:58:45 2014 +0000
+++ b/main.cpp	Tue Nov 11 16:41:53 2014 +0000
@@ -9,28 +9,42 @@
    uint8_t ifftFlag,
    uint8_t bitReverseFlag);
 
-Serial pc(USBTX, USBRX);
+Serial pc(USBTX, USBRX);//:D ПРИВЕТ!!!!
+
+
  
 AnalogIn   left(A2);
 AnalogIn   right(A3);
+AnalogIn   center(A3);
  
 int SAMPLE_RATE_HZ = 40000;             // Sample rate of the audio in hertz.
-const int FFT_SIZE = 16;                // Size of the FFT.
+//const int FFT_SIZE = 16;                // Size of the FFT.
+const int FFT_SIZE = 1024;                // Size of the FFT.
  
 const static arm_cfft_instance_f32 *S;
 //static arm_cfft_radix2_instance_f32 *S;
 Ticker samplingTimer;
 float samples[FFT_SIZE*2];
+float samples2[FFT_SIZE*2];
+float samples3[FFT_SIZE*2];
+
 float magnitudes[FFT_SIZE];
+float magnitudes2[FFT_SIZE];
+float magnitudes3[FFT_SIZE];
 int sampleCounter = 0;
+
  
 void samplingCallback()
 {    
     // Read from the ADC and store the sample data
     samples[sampleCounter] = 1000*left.read();
+    samples2[sampleCounter] = 1000*left.read();
+    samples3[sampleCounter] = 1000*left.read();
     // Complex FFT functions require a coefficient for the imaginary part of the input.
     // Since we only have real data, set this coefficient to zero.
     samples[sampleCounter+1] = 0.0;
+    samples2[sampleCounter+1] = 0.0;
+    samples3[sampleCounter+1] = 0.0;
     // Update sample buffer position and stop after the buffer is filled
         
     sampleCounter += 2;
@@ -89,7 +103,12 @@
         break;
     }
     float maxValue = 0.0f;
+    float maxValue2 = 0.0f;
+    float maxValue3 = 0.0f;
+    
     unsigned int testIndex = 0;
+    unsigned int testIndex2 = 0;
+    unsigned int testIndex3 = 0;
  
     // Begin sampling audio
     samplingBegin();
@@ -102,24 +121,54 @@
             // Run FFT on sample data.
             //arm_cfft_radix2_f32(arm_cfft_radix2_instance_f32*S, samples);
             arm_cfft_f32(S, samples, 0, 1);
-            samples[0] = 0;
+            arm_cfft_f32(S, samples2, 0, 1);
+            arm_cfft_f32(S, samples3, 0, 1);
+           samples[0]=0;
+           samples2[0]=0;
+           samples3[0]=0;
+            
             /* Initialize the CFFT/CIFFT module */
             //arm_cfft_radix2_init_f32(S, 128, 0, 1);
             //arm_cfft_radix2_f32(S, samples);
-            for(int i = 0;i < FFT_SIZE*2;++i)
-                pc.printf("     Samples[%d]: %8.2f ",i,samples[i]);
-            pc.printf("\r\n");
+            //for(int i = 0;i < FFT_SIZE*2;++i)
+            //    pc.printf("     Samples[%d]: %8.2f ",i,samples[i]);
+            //pc.printf("\r\n");
             // Calculate magnitude of complex numbers output by the FFT.
             arm_cmplx_mag_f32(samples, magnitudes, FFT_SIZE);
-            for(int i = 0;i < FFT_SIZE;++i)
-                pc.printf("     Magnitude: %d = %8.2f ;", i, magnitudes[i]);
-            pc.printf("       \r\n");
+            arm_cmplx_mag_f32(samples2, magnitudes2, FFT_SIZE);
+            arm_cmplx_mag_f32(samples3, magnitudes3, FFT_SIZE);
+            
+            //for(int i = 0;i < FFT_SIZE;++i)
+            //    pc.printf("     Magnitude: %d = %8.2f ;", i, magnitudes[i]);
+            //pc.printf("       \r\n");
             arm_max_f32(magnitudes, FFT_SIZE, &maxValue, &testIndex);
-            pc.printf("     MAX value at magnitudes[%d] : %+8.2f\r\n", testIndex, maxValue);
+            arm_max_f32(magnitudes2, FFT_SIZE, &maxValue2, &testIndex2);
+            arm_max_f32(magnitudes3, FFT_SIZE, &maxValue3, &testIndex3);
+            pc.printf("     MAX value at magnitudes 1[%d] : %+8.2f\r\n", testIndex, maxValue);//Я НЯШКА А АНЯ ВЛАСЮК КОЗА:DDDDDDDDDDDDD
+            pc.printf("     MAX value at magnitudes 2[%d] : %+8.2f\r\n", testIndex2, maxValue2);
+            pc.printf("     MAX value at magnitudes 3[%d] : %+8.2f\r\n", testIndex3, maxValue3);
+            
+            double delta_t = 0;
+            if ((testIndex < testIndex2) and (testIndex < testIndex3) and (testIndex2 < testIndex3))
+                delta_t = (testIndex3 - testIndex)*0.000025;
+            else if ((testIndex < testIndex2)and(testIndex < testIndex3)and(testIndex2 > testIndex3))
+                delta_t = (testIndex2 - testIndex)*0.000025;
+            else if ((testIndex2 < testIndex3)and(testIndex2 < testIndex)and(testIndex < testIndex3))
+                delta_t = (testIndex3 - testIndex2)*0.000025;
+            else if ((testIndex2 < testIndex3)and(testIndex2 < testIndex)and(testIndex > testIndex3))
+                delta_t = (testIndex - testIndex3)*0.000025;
+            else if (testIndex2 < testIndex)
+                delta_t = (testIndex - testIndex3)*0.000025;
+            else
+                delta_t = (testIndex - testIndex2)*0.000025;
+            double fi = asin(330*delta_t/0.33);
+            pc.printf("     Angle is  : %+8.2f\r\n", fi);
+            
             // Wait for user confirmation to restart audio sampling.
             //pc.getc();
             wait(1);
             samplingBegin();
         }
     }
-}
\ No newline at end of file
+}
+