Functions
static Int	DMA_getStatus (CSL_DMA_Handle hDMA)

Function Documentation

static Int DMA_getStatus ( CSL_DMA_Handle hDMA ) [inline, static]

===========================================================================
DMA_getStatus

Description
This function return the status whether data transfer has done or not as per passed CSL_DMA_Handle.

Arguments

            hDMA            Handle to the DMA

Return Value Int

0 - Data Transfer done
1 - Data Transfer is happening.
CSL_ESYS_BADHANDLE - Invalid DMA handle

Pre Condition
1. DMA_open() must be called successfully before this function call 2. Call DMA_config() for the handle return by DMA_open() 3. Start trasfer by calling DMA_start().

Post Condition
This checking is applicable for Transfer in Polling mode.

Modifies
None

Example

        #define CSL_DMA_BUFFER_SIZE 1024

            CSL_DMA_Handle       hDMA;
            CSL_DMA_Config       pConfig;
            CSL_status           status;
            CSL_DMAChanNum       chanNum;
            CSL_DMA_ChannelObj   pDmaChanObj
            Int                  dmaStatus;

        Uint16 dmaSRCBuff[CSL_DMA_BUFFER_SIZE];
        Uint16 dmaDESTBuff[CSL_DMA_BUFFER_SIZE];

            chanNum = CSL_DMA_CHAN0;
            hDMA = DMA_open(chanNum, &pDmaChanObj, &status);

#if (defined(CHIP_C5505_C5515) || defined(CHIP_C5504_C5514))
            pConfig.pingPongMode = CSL_DMA_PING_PONG_DISABLE;
#endif

            pConfig.autoMode     = CSL_DMA_AUTORELOAD_DISABLE;
            pConfig.burstLen     = CSL_DMA_TXBURST_8WORD;
            pConfig.trigger      = CSL_DMA_SOFTWARE_TRIGGER;
            pConfig.dmaEvt       = CSL_DMA_EVT_NONE;
            pConfig.dmaInt       = CSL_DMA_INTERRUPT_DISABLE;
            pConfig.chanDir      = CSL_DMA_READ;
            pConfig.trfType      = CSL_DMA_TRANSFER_MEMORY;
            pConfig.dataLen      = CSL_DMA_BUFFER_SIZE * 2;
            pConfig.srcAddr      = (Uint32)dmaSRCBuff;
            pConfig.destAddr     = (Uint32)dmaDESTBuff;

            status = DMA_Config(hDMA, &pConfig);

            status = DMA_start (hDMA);

            dmaStatus = DMA_getStatus (hDMA);

===========================================================================

Parameters:

hDMA	Pointer to the object that holds reference to the DMA handle object.

References CSL_DMA_ChannelObj::chanNum, CSL_DMA_CHAN0, CSL_DMA_CHAN1, CSL_DMA_CHAN2, CSL_DMA_CHAN3, and CSL_DMA_ChannelObj::dmaRegs.

Functions

Function Documentation