pca.h

DTMF FSK 在51 上的实现

#ifndef _PCA_H
#define _PCA_H

  void CEX0_isr(void);  //pin CEX0 interrupt serviece routine
  void CEX1_isr(void);  //pin CEX1 interrupt serviece routine
  void CEX2_isr(void);  //pin CEX2 interrupt serviece routine

  

//-----------------------------------------------------------
  extern bit CFSK_capture_flag,DTMF_capture_flag;
  extern bit CFSK_start_bit,CFSK_request_flag;
  extern bit CFSK_1ms_timer;

  extern unsigned char CFSK_edge_counter;
  extern unsigned char CFSK_bit_counter;
  extern unsigned char CFSK_byte_counter;
  extern unsigned char CFSK_received_byte;
  extern unsigned char CFSK_receive_buf[6];  

  extern unsigned int  previous_period,current_period,CFSK_1ms_count;
  extern unsigned char  test_char;
//-----------------------------------------------------------
  extern void Timer2_reload(void);
  extern void Timer0_reload(void);
  extern void send_cfsk_digit(unsigned char);
//-----------------------------------------------------------
#endif