mcbsp_mulchannel_example.c

Dm6455 driver,magbe useful to you!

    /* Initialize the MCBSP CSL module */
    status = CSL_mcbspInit(&pContext);
    if (status != CSL_SOK) {
        printf("Mcbsp initialization failed\n");
        return;
    }
    
    /* Open the CSL module */
    hMcbsp = CSL_mcbspOpen (&mcbspObj, CSL_MCBSP_0, NULL, &status);
    if ((hMcbsp == NULL) || (status != CSL_SOK)) {
        printf ("MCBSP: Opening instance... Failed.\n");
        printf ("\tReason: Error opening the instance. \
                [status = 0x%x, hMcbsp = 0x%x]\n", status, hMcbsp);
        exit(1);
    }

    /* Put SRG, Frame-sync, XMT and RCV in reset */
    ctrlMask =   CSL_MCBSP_CTRL_SRG_DISABLE
               | CSL_MCBSP_CTRL_FSYNC_DISABLE
               | CSL_MCBSP_CTRL_TX_DISABLE
               | CSL_MCBSP_CTRL_RX_DISABLE;
    status = CSL_mcbspHwControl(hMcbsp, CSL_MCBSP_CMD_RESET_CONTROL, &ctrlMask);
    if (status != CSL_SOK) {
        printf("Mcbsp CSL_MCBSP_CMD_RESET_CONTROL command failed\n");
        return;
    }
    
    /* Program MCBSP control registers */
    status = CSL_mcbspHwSetup(hMcbsp, &myHwSetup);
    if (status != CSL_SOK) {
        printf ("MCBSP: Hardware setup... Failed.\n");
        exit(1);
    }
    
    /* Get the mcbsp control register values */
    status = CSL_mcbspGetHwSetup (hMcbsp , &readHwSetup); 
    if (status != CSL_SOK) {
        printf ("MCBSP: Get Hardware setup... Failed.\n");
        exit(1);
    }
    
    /* Compare the hardware setup parameter values passed in the
     * "hwSetup" structure by comparing them with the actual values read from
     * the Mcbsp registers 
     */
    status = hwSetupVerify (&myHwSetup, &readHwSetup);
    if (status != CSL_SOK){
        printf ("MCBSP: Hardware setup and Read Hardware setup parameter "); 
        printf ("comparision ... Failed.\n");
        exit(1);
    }
       
    /* Enabling the channels- 0 & 31 */
    channel.channelNo = 0;
    channel.operation = CSL_MCBSP_CHCTRL_RX_ENABLE;
    CSL_mcbspHwControl (hMcbsp, CSL_MCBSP_CMD_CHANNEL_CONTROL, &channel);
    
    channel.channelNo = 31;
    channel.operation = CSL_MCBSP_CHCTRL_RX_ENABLE;
    CSL_mcbspHwControl (hMcbsp, CSL_MCBSP_CMD_CHANNEL_CONTROL, &channel);

    channel.channelNo = 0;
    channel.operation = CSL_MCBSP_CHCTRL_TX_ENABLE;
    CSL_mcbspHwControl (hMcbsp, CSL_MCBSP_CMD_CHANNEL_CONTROL, &channel);

    channel.channelNo = 31;
    channel.operation = CSL_MCBSP_CHCTRL_TX_ENABLE;
    CSL_mcbspHwControl (hMcbsp, CSL_MCBSP_CMD_CHANNEL_CONTROL, &channel);
       
    /* Start sample rate generator and wait for 2 clock cycles */
    ctrlMask = CSL_MCBSP_CTRL_SRG_ENABLE | CSL_MCBSP_CTRL_FSYNC_ENABLE;
    CSL_mcbspHwControl(hMcbsp, CSL_MCBSP_CMD_RESET_CONTROL, &ctrlMask); 
    
    /* Give small delay to start sample rate generator */
    WAIT_FOR_2_CLK;
    
    /* Enable MCBSP transmit and receive */
    ctrlMask = CSL_MCBSP_CTRL_TX_ENABLE | CSL_MCBSP_CTRL_RX_ENABLE;
    CSL_mcbspHwControl(hMcbsp, CSL_MCBSP_CMD_RESET_CONTROL, &ctrlMask);    
    
    /* Give small delay to enable transmit and receive */
    WAIT_FOR_2_CLK;
    
    printf("Waiting for transmission to Complete\n");
    
    /* Begin data transfer loop. We will loop through to transmit 
     * and receive the data.
     */                                   
    for (loopIndex = 0; loopIndex <= NumOfWords - 1; loopIndex++) {
        /* Wait for XRDY signal before writing data to DXR */
        response = 0;
        while (!(response & CSL_MCBSP_XRDY)) {
            CSL_mcbspGetHwStatus(hMcbsp, CSL_MCBSP_QUERY_DEV_STATUS, &response);
        }  
        
        /* Write 32 bit data value to DXR */    
        CSL_mcbspWrite (hMcbsp, CSL_MCBSP_WORDLEN_32, &xmt[loopIndex]);
        
        /* Wait for RRDY signal to read data from DRR */
        response = 0;
        while (!(response & CSL_MCBSP_RRDY)) {
            CSL_mcbspGetHwStatus(hMcbsp, CSL_MCBSP_QUERY_DEV_STATUS, &response);
        }
     
        /* Read 32 bit value from DRR */
        CSL_mcbspRead (hMcbsp, CSL_MCBSP_WORDLEN_32, &rcv[loopIndex]); 
    }    
    
    /* Check data to make sure transfer was successful */
    for(loopIndex = 0; loopIndex <= NumOfWords - 1; loopIndex++) {
        if (xmt[loopIndex] != rcv[loopIndex]) {
            printf("xmt[%d] != rcv[%d]\n", loopIndex, loopIndex);
            ++err;      
        }
        else {
            printf("xmt[%d] == rcv[%d]\n",loopIndex, loopIndex);
        }
    }
 
    printf("\n%s",err?"TRANSMISSION: EXAMPLE FAILED\n":"TRANSMISSION SUCCESS\n");
       
    /* We are done with MCBSP, so close it */ 
    CSL_mcbspClose(hMcbsp); 

    return;    
}

/*
 * ============================================================================
 *   @func   hwSetupVerify
 *
 *   @desc
 *     This function compare the hardware setup parameter values passed in the
 *     "hwSetup" structure by comparing them with the actual values read from
 *     the Mcbsp registers.
 *
 *   @arg    hwSetup
 *       Pointer to the buffer containing the hardware setup parameters that
 *       are needed to be compare
 *   @arg    hwSetupRead
 *       Pointer to the buffer containing the get hardware setup parameters that
 *       are needed to be compared with setup parameters
 *
 * ============================================================================
*/
CSL_Status hwSetupVerify (
      CSL_McbspHwSetup    *hwSetup,
      CSL_McbspHwSetup    *hwSetupRead
)
{ 
    CSL_Status    status = CSL_SOK;
    
    /* Check the mcbsp global setup parameters */
    if (hwSetupRead->global != NULL) {
        if(!((hwSetup->global->dlbMode == hwSetupRead->global->dlbMode) 
            &&(hwSetup->global->clkStopMode == \
                                             hwSetupRead->global->clkStopMode) 
            &&(hwSetup->global->ioEnableMode == \
                                        hwSetupRead->global->ioEnableMode))) {
            status = CSL_ESYS_FAIL;
        } 
    }  
    
    /* Check the mcbsp receive data setup parameters */
    if (hwSetupRead->rxdataset != NULL) {
        if (!((hwSetup->rxdataset->numPhases == \
                                           hwSetupRead->rxdataset->numPhases)
            &&(hwSetup->rxdataset->wordLength1 == \
                                        hwSetupRead->rxdataset->wordLength1) 
            &&(hwSetup->rxdataset->wordLength2 == \
                                        hwSetupRead->rxdataset->wordLength2)
            &&(hwSetup->rxdataset->frmLength1 == \
                                        hwSetupRead->rxdataset->frmLength1)
            &&(hwSetup->rxdataset->frmSyncIgn  == \
                                        hwSetupRead->rxdataset->frmSyncIgn)
            &&(hwSetup->rxdataset->compand == \
                                        hwSetupRead->rxdataset->compand)
            && (hwSetup->rxdataset->dataDelay == \
                                        hwSetupRead->rxdataset->dataDelay)
            &&(hwSetup->rxdataset->rjust_dxenable == \
                                        hwSetupRead->rxdataset->rjust_dxenable)
            &&(hwSetup->rxdataset->intEvent == \
                                        hwSetupRead->rxdataset->intEvent)
            &&(hwSetup->rxdataset->wordReverse == \
                                       hwSetupRead->rxdataset->wordReverse))) {
               
            status = CSL_ESYS_FAIL;
        }
    }
    
    /* Check the mcbsp transmit data setup parameters */
    if (hwSetupRead->txdataset != NULL) {
        if (!((hwSetup->txdataset->numPhases == \
                                        hwSetupRead->txdataset->numPhases) 
            &&(hwSetup->txdataset->wordLength1 == \
                                        hwSetupRead->txdataset->wordLength1)
            &&(hwSetup->txdataset->wordLength2 == \
                                        hwSetupRead->txdataset->wordLength2)
            &&(hwSetup->txdataset->frmLength1 == \
                                        hwSetupRead->txdataset->frmLength1)
            &&(hwSetup->txdataset->frmSyncIgn == \
                                        hwSetupRead->txdataset->frmSyncIgn)
            &&(hwSetup->txdataset->compand == \
                                        hwSetupRead->txdataset->compand)
            &&(hwSetup->txdataset->dataDelay == \
                                        hwSetupRead->txdataset->dataDelay)
            &&(hwSetup->txdataset->rjust_dxenable == \
                                        hwSetupRead->txdataset->rjust_dxenable)
            &&(hwSetup->txdataset->intEvent == \
                                        hwSetupRead->txdataset->intEvent)
            &&(hwSetup->txdataset->wordReverse == \
                                       hwSetupRead->txdataset->wordReverse))) {
           
            status = CSL_ESYS_FAIL;
        }
    }

    /* Check the mcbsp clock setup parameters */
    if (hwSetupRead->clkset != NULL) {
        if (!((hwSetup->clkset->frmSyncRxMode == \
                                        hwSetupRead->clkset->frmSyncRxMode)
            &&(hwSetup->clkset->frmSyncTxMode == \
                                        hwSetupRead->clkset->frmSyncTxMode)
            &&(hwSetup->clkset->frmSyncRxPolarity == \
                                        hwSetupRead->clkset->frmSyncRxPolarity)
            &&(hwSetup->clkset->frmSyncTxPolarity == \
                                        hwSetupRead->clkset->frmSyncTxPolarity)
            &&(hwSetup->clkset->clkRxMode == \
                                        hwSetupRead->clkset->clkRxMode)
            &&(hwSetup->clkset->clkTxMode == \
                                        hwSetupRead->clkset->clkTxMode)
            &&(hwSetup->clkset->clkRxPolarity == \
                                    hwSetupRead->clkset->clkRxPolarity)
            &&(hwSetup->clkset->clkTxPolarity == \
                                    hwSetupRead->clkset->clkTxPolarity)
            &&(hwSetup->clkset->srgFrmPulseWidth  == \
                                    hwSetupRead->clkset->srgFrmPulseWidth)
            &&(hwSetup->clkset->srgFrmPeriod == \
                                    hwSetupRead->clkset->srgFrmPeriod)
            &&(hwSetup->clkset->srgClkDivide == \
                                    hwSetupRead->clkset->srgClkDivide)
            &&(hwSetup->clkset->srgClkSync == \
                                    hwSetupRead->clkset->srgClkSync)
            &&(hwSetup->clkset->srgInputClkMode == \
                                    hwSetupRead->clkset->srgInputClkMode)
            &&(hwSetup->clkset->srgClkPolarity == \
                                    hwSetupRead->clkset->srgClkPolarity)
            &&(hwSetup->clkset->srgTxFrmSyncMode == \
                                    hwSetupRead->clkset->srgTxFrmSyncMode))) {
            
            status = CSL_ESYS_FAIL;
        }
    }
    
	/* Check the mcbsp multichannel setup parameters */
    if (hwSetupRead->mulCh != NULL) {
        if(!((hwSetup->mulCh->rxMulChSel == hwSetupRead->mulCh->rxMulChSel)
            &&(hwSetup->mulCh->txMulChSel  == hwSetupRead->mulCh->txMulChSel)
            &&(hwSetup->mulCh->rxPartition == hwSetupRead->mulCh->rxPartition)
            &&(hwSetup->mulCh->rxPartABlk  == hwSetupRead->mulCh->rxPartABlk)
            &&(hwSetup->mulCh->rxPartBBlk  == hwSetupRead->mulCh->rxPartBBlk)
            &&(hwSetup->mulCh->txPartition == hwSetupRead->mulCh->txPartition)
            &&(hwSetup->mulCh->txPartABlk  == hwSetupRead->mulCh->txPartABlk)
            &&(hwSetup->mulCh->txPartBBlk  == \
                                           hwSetupRead->mulCh->txPartBBlk))) { 
       
            status = !CSL_SOK;
        }
    }

    /* Check the mcbsp emulation mode setup parameters */
    if(!((hwSetup->emumode == hwSetupRead->emumode ) &&
        (hwSetup->extendSetup == hwSetupRead->extendSetup))) {
        
        status = CSL_ESYS_FAIL;
    }

    return status;
}