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/***********************************************************************
**  File Name:    IntrSrvc.c
**  Part Number:  TLV320AIC10/11EVM-SW-00002
************************************************************************
**  Copyright (c) Texas Instruments, Inc. 2000
************************************************************************
**
**  Release History:
**     Version      Date          Engr          Description
**      1.00     10-11-2000    Wendy X Fang   Original Release
**
************************************************************************
**
**  Function:
**    This file includes all interrupt service routines (ISR) for
**    T5402 DSP that communicates to AIC10 CODEC EVM.
**
************************************************************************
**  References:
**    (1) TMS320C54x DSP, CPU and Peripheral (SPRU131)
**    (2) TMS320C54x DSP, Enhanced Peripheral (SPRU302)
***********************************************************************/

/***********************************************************************
** Include Statements
***********************************************************************/
#include   "IntrSrvc.h" 

/***********************************************************************
**  Interrupt Serivece Routines
***********************************************************************/

/******** This ISR responds to McBSP0 receive ready
          flags to load ADC data from McBSP RX register
          and send DTMF tone to AIC10 for output
          This interrupt occures at 16Khz frequency!  *******/
interrupt void McBSP0RXISR()
{
    McBSP0Frame=McBSP0_DRR1&0x0001; /* get master/slave bit */
    if (McBSP0Frame == 1)
    {                               /* while McBSP0 comm to master AIC */
       MS_ADC = McBSP0_DRR1&0xFFFE; /* load master AIC10 ADC result    */
       McBSP0_DXR1 = SOut;          /* securied voice to mstr AIC DAC  */
    }
    else
    {                               /* while McBSP0 comm to slave AIC */
       SL_ADC = McBSP0_DRR1&0xFFFE; /* load slave AIC10 ADC result    */
       McBSP0_DXR1 = ToneWave;      /* DTMF tone to slave AIC DAC     */
    } 

    IFR   |= 0x0010;                /* reset BRINT0 interrupt flag    */  
}

/******** This ISR responds to FS to generate
          input for DCSI input on the AIC10-EVM
          via McBSP1 TX ready interrupt (BXINT1)
          This routine will be call if DCSI is used
          as for configuration for AIC10 device
          control registers. Do the following
          before enable this interrupt:
          (1) Set DCSICount = 0;
          (2) Clear McBSP1's RX/TX interrupt flags first;
          (3) Enable McBSP1's TX; and
          (4) Enable BXINT1                       *******/
interrupt void McBSP1TXISR()
{ 
    if (McBSP1Frame == 0)          /* while at master phase  */
    {
       DCSIData  = SlaveCRValues[DCSICount]; /* load slave data  */
       DCSICount += 1;            /* point to next CR        */
       McBSP1Frame = 1;
    }
    else                           /* while at slave phase       */
    {
       DCSIData = MasterCRValues[DCSICount];
       if (DCSICount >= 4)        /* total 4 CRs at each AIC */
       {                          /* while finished config:  */
           DCSICount  = 0;        /* clear Counter           */
           DCSIConfig = 0;        /* clear DCSI Config flag  */
       }
       McBSP1Frame = 0;    
    }
    IFR |= 0x0800;                 /* reset BXINT1 interrupt flag */
    McBSP1_DXR1 = DCSIData;        /* put data to McBSP1 TX reg   */
}

/***********************************************************************
**  End of File -- IntrSrvc.c
***********************************************************************/