dtmf.h

DTMF FSK 在51 上的实现

#ifndef _DTMF_H
#define _DTMF_H


#define dialing_interval  500  //interval:500ms
extern bit DTMF_process_flag,CFSK_process_flag;
extern unsigned char PCA_buf0_high,PCA_buf0_low,PCA_buf1_high,PCA_buf1_low;

//dialing circuit control pins
  sbit HOOK     = P0^5;
  sbit SEIZE    = P0^6;
  sbit GAIN_CHN = P1^6;
  sbit PULSE    = P0^4;
//
  
  
  

//functions declaration
  void dtmf_init(void);
  void DTMF_process(void);
  extern void delay(unsigned int i);
  extern void Timer0_reload(void);
  extern void CFSK_process(void);
#endif