function gdtmf(nummarc,ti,td);
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%FUNCION GENERADORA DE VARIOS TONOS DTMF
%La función es de la forma: gdtmf(nummarc,ti,td)
%nummarc 	es un vector que contiene al numero a generarse
%ti		es el tiempo de duración de cada tono en segundos
%		todos los tonos tienen la misma duración de ti segundos
%td		es la duración en segundos del silencio que existe entre tono y tono
%		todos los silencios tienen la misma duración
%EJEMPLO: Si se desa generar tonos para el numero 5223277
%con una duración de tonos de 100ms y tiempo de silencio entre
%tono y tono de 50ms se debe ingresar el siguiente comando:
%gdtmf([5 2 2 3 2 7 7],0.1,0.05)
%Se escucharan los tonos generados
%y estos seran grabados en un archivo llamado dtmf2.wav
%IMPORTANTE: Se requiere además del programa genera.m
%ver ayuda de dicho archivo para mayor detalle
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
yy=0;
fs=8000;%frecuencia de muestreo
deltat=0.000125;%delta de tiempo
t=[0:deltat:ti];
digitos=[1 2 3 'A' 4 5 6 'B' 7 8 9 'C' '*' 0 '#' 'D'];
frecuencias=[697 697 697 697 770 770 770 770 852 852 852 852 941 941 941 941;
   1209 1336 1477 1633 1209 1336 1477 1633 1209 1336 1477 1633 1209 1336 1477 1633];
for I=1:length(nummarc),%se anliza elemento por elemento vector que contiene el numero marcado
   for J=1:length(digitos),
      if digitos(J)==nummarc(I)%se compara con tabla predeterminada
         f1=frecuencias(1,J);%se detecta frecuencia DTMF de acuerdo a tabla
         f2=frecuencias(2,J);
         yy=genera(f1,f2,fs,yy,td,deltat,t);%se genera tono DTMF
         J=1;
      end
   end
end
yy=yy;
%sound(yy,fs)
wavwrite(yy,'reall2')%se graba archivo con el nombre dtmf2.wav

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%Diseñado para el proyecto "Detección de tonos DTMF usando el algoritmo de Goertzel" del
%curso de Procesamiento Digital de Señales
%
%Integrantes del grupo:
%
% - Miguel Rosadio Rojas
% - Julio Manco Vasquez
% - Jaime Castro Amaro
%
%Copyrigth Diciembre del 2003
%Todos los derechos reservados
%Se permite el uso del código siempre y cuando se mencione la fuente de donde lo obtuvo.
%http://dsp_peru.tripod.com
%
%									Pontificica Universidad Católica del Perú
%										Facultad de Ciencias e Ingeniería
%										Sección Electricidad y Electrónica														
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%






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