hola compañeros foreros, quiero hacer un llamador por telefono por tono, esto puede ser utilisando algun CI de la spesialidad como el HT9200B, pero el problema es que en mi país segun yo no esta, y queria ver si alguien save de algun otro integrado que m permita generar los tonos DTMF. o acerlo mediante un pic, e visto que hay una libreria EX_DTMF.C que genera estos tonos, pero tengo 2 inconvenientes con esto:
1- se nesesita un trnasformador para suavisar la señal
2- esta pensada para trabajarla con un teclado 3x4.
bueno no puedo trabajar con teclado ya que quiero conectarlo al PC.
bueno mi pregunta es:
alguien tiene o save de algun CI que aga estó osea generar tonos DTMF ???
alguien save o me puede ayudar a modificar la libreria para poder trabajarla con el pc y no con un teclado?????
bueno la libreria es esta;
/////////////////////////////////////////////////////////////////////////
//// EX_DTMF.C ////
//// ////
//// This program simulates a touch-tone telephone. The user can ////
//// push keys on the keypad and the dtmf tones will be heard over ////
//// the speaker. If the user places the receiver of a telephone ////
//// over the speaker, and then dials a number on the keypad, the ////
//// telephone will recognize the dtmf tones and place the call. ////
//// ////
//// Configure the CCS prototype card as follows: ////
//// Plug in the KEYPAD. ////
//// Connect a R-2R ladder to Port D as shown below. ////
//// Connect the negative wire of the speaker to ground. ////
//// Connect the positive wire of the speaker to the output of ////
//// the R-2R ladder. ////
//// ////
//// PIN 32 PIN 33 PIN 34 PIN 35 PIN 36 PIN 37 PIN 38 PIN 39 ////
//// | | | | | | | | ////
//// 2R 2R 2R 2R 2R 2R 2R 2R ////
//// | | | | | | | | ////
//// *---R---*---R---*---R---*---R---*---R---*---R---*---R---* ////
//// | | ////
//// 2R | ////
//// | R = 100 ohms OUTPUT ////
//// GND PIN 27 2R = 200 ohms ////
//// ////
//// This example will work with the PCB, PCM and PCH compilers. ////
//// The following conditional compilation lines are used to ////
//// include a valid device for each compiler. Change the device, ////
//// clock and RS232 pins for your hardware if needed. ////
/////////////////////////////////////////////////////////////////////////
//// (C) Copyright 1996,2003 Custom Computer Services ////
//// This source code may only be used by licensed users of the CCS ////
//// C compiler. This source code may only be distributed to other ////
//// licensed users of the CCS C compiler. No other use, ////
//// reproduction or distribution is permitted without written ////
//// permission. Derivative programs created using this software ////
//// in object code form are not restricted in any way. ////
/////////////////////////////////////////////////////////////////////////
#if defined(__PCB__)
#include <16c56.h>
#fuses HS,NOWDT,NOPROTECT
#use delay(clock=20000000) // must be 20 MHz
#elif defined(__PCM__)
#include <16F877.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=20000000) // must be 20 MHz
#elif defined(__PCH__)
#include <18F452.h>
#fuses HS,NOWDT,NOPROTECT,NOLVP
#use delay(clock=20000000) // must be 20 MHz
#endif
#include <kbd.c>
CONST unsigned int SINE_WAVE[200] = {
128,132,136,139,143,147,150,154,158,161,165,169,172,176,179,
182,186,189,192,195,199,202,204,207,210,213,215,218,220,223,
225,227,229,231,233,235,237,238,240,241,242,243,244,245,246,
247,247,247,248,248,248,248,248,247,247,247,246,245,244,243,
242,241,240,238,237,235,233,231,229,227,225,223,220,218,215,
213,210,207,204,202,199,195,192,189,186,182,179,176,172,169,
165,161,158,154,150,147,143,139,136,132,128,124,120,117,113,
109,106,102, 98, 95, 91, 87, 84, 80, 77, 74, 70, 67, 64, 61,
57, 54, 52, 49, 46, 43, 41, 38, 36, 33, 31, 29, 27, 25, 23,
21, 19, 18, 16, 15, 14, 13, 12, 11, 10, 9, 9, 9, 8, 8,
8, 8, 8, 9, 9, 9, 10, 11, 12, 13, 14, 15, 16, 18, 19,
21, 23, 25, 27, 29, 31, 33, 36, 38, 41, 43, 46, 49, 52, 54,
57, 61, 64, 67, 70, 74, 77, 80, 84, 87, 91, 95, 98,102,106,
109,113,117,120,124};
int index1,index2,inc1,inc2;
#INT_RTCC
void wave_generator() {
int wave = 0;
set_rtcc(25); // when clock is 20MHz, interrupts every 100us
wave = ((long)SINE_WAVE[index1]+(long)SINE_WAVE[index2])/2;
output_d(wave);
index1 += inc1;
index2 += inc2;
if(index1 >= 200)
index1 -= 200;
if(index2 >= 200)
index2 -= 200;
}
#define DTMF_ROW1 14 // for 700 Hz, increment this many times every 100us
#define DTMF_ROW2 15 // for 750 Hz, increment this many times every 100us
#define DTMF_ROW3 17 // for 850 Hz, increment this many times every 100us
#define DTMF_ROW4 19 // for 950 Hz, increment this many times every 100us
#define DTMF_COLA 24 // for 1200 Hz, increment this many times every 100us
#define DTMF_COLB 27 // for 1350 Hz, increment this many times every 100us
#define DTMF_COLC 30 // for 1500 Hz, increment this many times every 100us
void generate_dtmf_tone(char keypad, long duration) {
index1=0;
index2=0;
inc1=0;
inc2=0;
if((keypad=="1")||(keypad=="2")||(keypad=="3"))
inc1=DTMF_ROW1;
else if((keypad=="4")||(keypad=="5")||(keypad=="6"))
inc1=DTMF_ROW2;
else if((keypad=="7")||(keypad=="8")||(keypad=="9"))
inc1=DTMF_ROW3;
else if((keypad=="*")||(keypad=="0")||(keypad=="#"))
inc1=DTMF_ROW4;
if((keypad=="1")||(keypad=="4")||(keypad=="7")||(keypad=="*"))
inc2=DTMF_COLA;
else if((keypad=="2")||(keypad=="5")||(keypad=="8")||(keypad=="0"))
inc2=DTMF_COLB;
else if((keypad=="3")||(keypad=="6")||(keypad=="9")||(keypad=="#"))
inc2=DTMF_COLC;
setup_counters(RTCC_INTERNAL,RTCC_DIV_2);
enable_interrupts(INT_RTCC);
enable_interrupts(GLOBAL);
while(duration-- > 0)
{
delay_ms(1);
}
disable_interrupts(INT_RTCC);
output_d(0);
}
void main() {
char k;
kbd_init();
while(TRUE)
{
k=kbd_getc();
if(k!=0)
generate_dtmf_tone(k, 100);
}
}espero que me puedan ayudar o orientar en lo que ando buscando.
saludos
