mt88l89v2.h

DTMF收发芯片88L89完美驱动（Arm,SDT251环境）

/*============================================================*\
	作    者 :Liusj			Date : 2002-11-08			version 1.0
  ============================================================
	文件说明 :			MT88L89V1.h
						BSP. MT88L89(DTMF)驱动程序（中断程序版本） . 头文件
	版权所有 :			1994-2001 Wuhan Jinglun Electronic Co., Ltd.
	修改历史 :			2003-03-07 --- modify DTMF_MODE to poll mode and add some error define and tone and pause period defines
	最后修改 :			2003-03-07
	备    注 :			
\*============================================================*/

#ifndef MT88L70V2_H
#define MT88L70V2_H

/* error defines */
#define     DTMF_ERROR      -1
#define     DTMF_HAS_OPENED -2
#define     DTMF_HAS_CLOSED -2
#define     DTMF_DATA_ERROR -1
#define     DTMF_NOT_OPEN   -2
#define     DTMF_TX_BUSY    -3

/* dial or no dial */
enum
{
	DTMF_DIAL,
	DTMF_DIAL_FINI
};
/* 2003-11-19, change to global varibles, controlled by config parameter */
#if 0
/* tone and pause period */
#define DTMF_TONE_PERD  6 /* this macro define the tone period of DTMF, it is based on
      					   clock ticks, that is 80ms when it is equre to 8
						   */
#define DTMF_PAUSE_PERD 4/* this macro define the pause period of DTMF, it is based on
      					   clock ticks, that is 40ms when it is equre to 4
						   */
#endif						   
/* functions */
int     DTMF_Decode_Init(void);    /* DTMF initition before receive or transmit */
int     DTMFOpen(void);   /* start to receive */
int     DTMFClose(void);  /* stop receive */
int     DTMFWrite(unsigned char _data, int notify );
int		DTMFCheckDialOpen(int checkID);
int    DTMFCheckDialClose(void);
#endif