mt88l89v2.c

DTMF收发芯片88L89完美驱动（Arm,SDT251环境）

	status = NU_Control_Timer(&DTMF_Dither_TimerCtrl, NU_ENABLE_TIMER);

	TONE_TRACE("BSP --- MT88L89V2 check dial tone open !!!!!\n");

	return 0;
}

/***************************************************
*
* DTMFCheckDialClose - stop check dial tone
*
* this routine call DTMFOpen to stop dial tone check
*
* RETURNS: int --- 0 OK
*				   -1 NOK
*
*/

int DTMFCheckDialClose(void)
{
	int status;
	
	status = NU_Control_Timer(&DTMF_Dither_TimerCtrl, NU_DISABLE_TIMER);		
	if (status != NU_SUCCESS)
	{
		return (-1);
	}
	g_IsCheckDialOpen = 0;
	
	if (g_DtmfOpenStatus == 0/*1*/)
	{
		//g_DtmfOpenStatus = 1/*0*/;
		DTMFOpen();	
	}	
	TONE_TRACE("BSP --- MT88L89V2 check dial tone close !!!!!\n");
	return (0);
}

/***************************************************
*
* DTMFWrite - send DTMF data
*
* this function send DTMF data through write DTMF data Tx register
*
* RETURNS: int --- 0  OK
*				   <0 Error
*
*/
static unsigned int g_IsWriteNotify = 0;

int DTMFWrite
(
	unsigned char _data, 	/* the data to write */
	int notify 				/* is needed to notify application module */ 
							/* notify = 0 --- no notify */
							/*        = 1 --- notify */
)
{  
	unsigned long * volatile pulPtr = (unsigned long *)HwBaseAddress;
	
	if ((g_MastDataTxStatus != DTMF_TX_IDLE) || (g_MastDataTx != DTMF_TX_IDLE))
	{
		return DTMF_TX_BUSY;
	}
	if (CharToDTMF(_data) == 0xff)
	{
		return DTMF_DATA_ERROR;
	}
    if (g_DtmfOpenStatus == 0)
    {
    	return DTMF_NOT_OPEN;
    }
	g_ChannelSave = ((unsigned char *)pulPtr)[HwPortB] & 0x18;	/* to save bit3&bit4 of Port B*/
	((unsigned char *)pulPtr)[HwPortB] |= 0x18; 				/* DTMF to line */
	//NU_Sleep(1);
	g_MastDataTx = _data;
	g_MastDataTxStatus = DTMF_TX_WORK;
	g_IsWriteNotify = notify;
	return 0;
}

/***************************************************
*
* DTMF_Timer_Expiration - DTMF timer expiration routine
*
* this function is the DTMF timer expiration routine, this routine Tx or Rx
* DTMF data in poll module
*
* RETURNS: void
*
*/

void DTMF_Timer_Expiration
(
	unsigned long id	/* timer id */
)
{
	int int_level = 0;

    g_MastStatus = *(unsigned char *)DTMF_STATUS_BASE;
    if (g_MastStatus & 0x04)/* rx ready */
    {
        g_pData = (unsigned char *)DTMF_RX_BASE;
   	    g_MastDataRx = DTMFToChar((*g_pData&0x0F));    /* receive data */ 
		
        //收到的数据，通知应用层....
        /* debug information */
        //TRACE("DTMF received:%c\n\n", g_MastDataRx);
        TONE_TRACE("BSP --- MT88L89 receive DTMF:%c !!!!\n\n", g_MastDataRx);
        DTMFSend(1, g_MastDataRx);
    }
   	if ((g_MastDataTxStatus == DTMF_TX_WORK) && (g_MastDataTx != DTMF_TX_IDLE))
   	{
		g_pData = (unsigned char *)DTMF_TX_BASE;
   	    g_pCtrl = (unsigned char *)DTMF_CONTROL_BASE; 
       	*g_pCtrl = 0x01; /* send data */
		int_level = NU_Control_Interrupts(NU_DISABLE_INTERRUPTS);
	    *g_pData = CharToDTMF(g_MastDataTx);  /* send first data */
		g_MastDataTx = DTMF_TX_IDLE;

		/* begin 2003-10-13, before send DTMF, close headphone */

		_HeadPhone_close();

		/* end */
		
		NU_Control_Interrupts(int_level);
   	    NU_Control_Timer(&DTMF_Mast_TimerCtrlTxTone, NU_ENABLE_TIMER);
		//DTMFSend(0, 0);
       	TONE_TRACE("BSP --- MT88L89 sending data begin :%c !!!!\n", g_MastDataTx);
   	}
}

/***************************************************
*
* 
* DTMF_TxTone_Timer_Expiration - DTMF Tx tone timer expiration routine
*
* this function is the DTMF Tx tone timer expiration routine
*
* RETURNS: void
*
*/

void DTMF_TxTone_Timer_Expiration
(
	unsigned long id	/* timer id */
)
{
	g_pCtrl = (unsigned char *)DTMF_CONTROL_BASE;	
	*g_pCtrl = 0x00;
	NU_Control_Timer(&DTMF_Mast_TimerCtrlTxTone, NU_DISABLE_TIMER);
	NU_Control_Timer(&DTMF_Mast_TimerCtrlTxPause, NU_ENABLE_TIMER);
}

/***************************************************
*
* 
* DTMF_TxPause_Timer_Expiration - DTMF Tx pause timer expiration routine
*
* this function is the DTMF Tx pause timer expiration routine
*
* RETURNS: void
*
*/

void DTMF_TxPause_Timer_Expiration
(
	unsigned long id	/* timer id */
)
{
	int int_level;
	unsigned long * volatile pulPtr = (unsigned long *)HwBaseAddress;
	
	((unsigned char *)pulPtr)[HwPortB] &= ~0x18;		/* clear bit3&bit4 of Port B */
	((unsigned char *)pulPtr)[HwPortB] |= g_ChannelSave;/* resume bit3&bit4 of Port B */
	NU_Control_Timer(&DTMF_Mast_TimerCtrlTxPause, NU_DISABLE_TIMER);
    int_level = NU_Control_Interrupts(NU_DISABLE_INTERRUPTS);
	/* reset status */
	g_MastDataTxStatus = DTMF_TX_IDLE;

	/* begin 2003-10-13, after DTMF send finish, open headphone */

	_HeadPhone_open();
	
	/* end */
	
	NU_Control_Interrupts(int_level);
	if (g_IsWriteNotify == 0x1)
	{
		DTMFSend(0, 0);
	}
	TONE_TRACE("BSP -- MT88L89 sending data end :%c !!!\n", g_MastDataTx);
}

void DTMF_Dither_Timer_Expiration
(
	unsigned long id	/* timer id */ 
)
{	
	char status;
	int delay = 1200;
	

	//while (delay-- > 0);/* delay for 120 ms */
	
 	status = ((*(unsigned char* )0x30000100) & 0x02) >> 1;

	if (g_IsCheckDial == 0x1)
	{
		TONE_TRACE("BSP --- MT88L89 begin check dialtone !!!!!!!!!!!!!!!!!\n");
		if (status == 0x1)
		{
			g_iDitherTimes++;
			TONE_TRACE("BSP --- detect dialtone times = %d @@@\n", g_iDitherTimes);
			
			if (g_iDitherTimes == 5)
			{
				g_iDitherTimes = 0;
				DTMFSend(2, DTMF_DIAL);				
				status = NU_Control_Timer(&DTMF_Dither_TimerCtrl, NU_DISABLE_TIMER);						
				//status = NU_Control_Timer(&DTMF_Mast_TimerCtrl, NU_ENABLE_TIMER);		
			}
		}
		else
		{
			g_iDitherTimes = 0;
		}
	}
	else
	{
		TONE_TRACE("BSP --- MT88L89 begin check dialtone off !!!!!!!!!!!!!!!!!\n");
		if (status == 0x0)
		{
			g_iDitherTimes++;
			TONE_TRACE("BSP --- detect dialtone off times = %d @@@\n", g_iDitherTimes);			
			if (g_iDitherTimes == 5)
			{
				g_iDitherTimes = 0;
				DTMFSend(2, DTMF_DIAL_FINI);				
				status = NU_Control_Timer(&DTMF_Dither_TimerCtrl, NU_DISABLE_TIMER);						
				//status = NU_Control_Timer(&DTMF_Mast_TimerCtrl, NU_ENABLE_TIMER);		
			}		
		}
		else
		{
			g_iDitherTimes = 0;
		}
	}
}

/***************************************************
*
* 
* CharToDTMF - convert character to DTMF data
*
* this function convert character to DTMF data
*
* RETURNS: unsigned char --- converted DTMF data
*
*/

unsigned char CharToDTMF
(
	unsigned char _ch	/* character to convert */
)
{
	unsigned char DTMFData;
	
  	switch (_ch)
   	{
        case '1':
        case '2':
        case '3':
        case '4':
        case '5':
        case '6':
        case '7':
        case '8':
        case '9':
        	DTMFData = _ch - '0';
         	break;
        case '0':
            DTMFData = 0x0A;
            break;
        case '*':
            DTMFData = 0x0B;
            break;
        case '#':
            DTMFData = 0x0C;
            break;
        case 'A':
     	    case 'a':
            DTMFData = 0x0D;
            break;
        case 'B':
       	case 'b':
            DTMFData = 0x0E;
            break;
        case 'C':
        case 'c':
            DTMFData = 0x0F;
            break;
        case 'D':
        case 'd':
            DTMFData = 0x00;
            break;
        default: /* error */
        	DTMFData = 0xff;
 	        break;
    }
	
  	return DTMFData;
}

/***************************************************
*
* 
* DTMFToChar - convert DTMF data to character
*
* this function convert DTMF data to character
*
* RETURNS: unsigned char --- converted character
*
*/

unsigned char DTMFToChar
(
	unsigned char _DTMFData	/* DTMF data to convert */
)
{
	unsigned char ch;
   	switch (_DTMFData)
  	{
       case 0x01:
       case 0x02:
       case 0x03:
       case 0x04:
       case 0x05:
       case 0x06:
       case 0x07:
       case 0x08:
       case 0x09:
           ch = _DTMFData + '0';
           break;
	   case 0x0A:
	       ch = '0';
 	       break;
 	   case 0x0B:
 	       ch = '*';
 	       break;
 	   case 0x0C:
 	       ch = '#';
 	       break;
 	   case 0x0D:
 	       ch = 'A';
 	       break;
 	   case 0x0E:
 	       ch = 'B';
 	       break;
 	   case 0x0F:
 	       ch = 'C';
 	       break;
 	   case 0x0:
 	       ch = 'D';
 	       break;
 	   default:
 	       break;
 	}
   	return ch;
}

int GetHfcCodecStatus()
{
	if ((g_MastDataTxStatus == DTMF_TX_IDLE) && (g_MastDataTx == DTMF_TX_IDLE))
	{
		return DTMF_WRITE_STATE_IDLE;
	}
	else
	{
		return DTMF_WRITE_STATE_BUZY;
	}
	
}