Diff: main.cpp

Revision:

1:7655383ca5fd

Parent:

0:2ccf3099b859

Child:

2:6f99f6b825b8

diff -r 2ccf3099b859 -r 7655383ca5fd main.cpp
--- a/main.cpp	Tue Dec 01 01:08:58 2015 +0000
+++ b/main.cpp	Wed Dec 02 20:14:40 2015 +0000
@@ -6,6 +6,12 @@
 #include "FastAnalogIn.h"
 #include <string>
 
+//Enrique García Sandoval A01224184
+//Emmanuel Gonzalez Palacios A01228185
+
+// Basado en el código de Frank Vannieuwkerke en KL25Z_FFT_Demo
+// https://developer.mbed.org/users/frankvnk/code/KL25Z_FFT_Demo/
+
 PwmOut myled(LED_GREEN);
 Serial pc(USBTX, USBRX);
 FastAnalogIn   Audio(PTC0);
@@ -14,7 +20,7 @@
 int SAMPLE_RATE_HZ = 4000;  
 const int FFT_SIZE = 256;     
 
-////Otras Variables////
+////Otras Variables para sampling y FFT////
 const static arm_cfft_instance_f32 *S;
 Ticker samplingTimer;
 float samples[FFT_SIZE*2];
@@ -23,7 +29,7 @@
 //*********//
 
 ////Utilidades////
-void printArr(int bigsize, float arr[]){
+void printArr(int bigsize, float arr[]){ //Imprime un arreglo de valores
     int size = (bigsize/sizeof(arr[0]));
     pc.printf("\r\n [");
     int limit = size - 1;
@@ -70,7 +76,7 @@
 
 //**********//
 
-//Funciones para DTMF//
+//Funciones para detección de DTMF//
 int col1 = frequencyToBin(1209);
 int col2 = frequencyToBin(1336);
 int col3 = frequencyToBin(1477);
@@ -83,7 +89,7 @@
 string valC3[] = {"3", "6", "9", "#"};
 
 
-int maxCol(){
+int maxCol(){ //Magnitud máxima en una columna
     int col = 0;
     float max = 0.0;
     if (magnitudes[col1] > max){
@@ -100,7 +106,7 @@
     return col;
 }
 
-int maxRow(){
+int maxRow(){ //Magnitud máxima en una fila
     int row = 0;
     float max = 0.0;
     if (magnitudes[row1] > max){
@@ -121,11 +127,11 @@
     return row;
 }
 
-string valor(){
+string valor(){ //Determina qué tecla se presiona
     int R = maxRow() - 1;
     int C = maxCol();
     //pc.printf("Las coordenadas son: %i, %i \n", R, C); //debug
-    string salida = "no";
+    string salida = "---";
     switch (C){
         case 1:
             salida = valC1[R];
@@ -142,12 +148,10 @@
 //**********//
 
 int main(){
-    myled = 0.999;
+    myled = 0.995;
     
     NVIC_set_all_irq_priorities(1);
     NVIC_SetPriority(UART0_IRQn, 0);
-    // Set up serial port.
-    pc.baud (9600);
     
     // Begin sampling audio
     samplingBegin();
@@ -193,8 +197,8 @@
             arm_cmplx_mag_f32(samples, magnitudes, FFT_SIZE);
             // Restart audio sampling.
             samplingBegin();
+            
             //Correr identificacion de tonos
-            
             printf(valor().c_str());
             printf("\r\n");
         }