Functions
csl_edma3ChannelOpen.c File Reference

The file implements the API which is used to open an EDMA channel. More...

#include <ti/csl/csl_edma3.h>

Functions

CSL_Edma3ChannelHandle CSL_edma3ChannelOpen (CSL_Edma3ChannelObj *pEdmaObj, CSL_InstNum edmaNum, CSL_Edma3ChannelAttr *pChAttr, CSL_Status *pStatus)

Detailed Description

The file implements the API which is used to open an EDMA channel.

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Function Documentation

CSL_Edma3ChannelHandle CSL_edma3ChannelOpen ( CSL_Edma3ChannelObj *  pEdmaObj,
CSL_InstNum  edmaNum,
CSL_Edma3ChannelAttr *  pChAttr,
CSL_Status *  pStatus 
)

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CSL_edma3ChannelOpen

Description
The API returns a handle for the specified EDMA Channel for use. The channel can be re-opened anytime after it has been normally closed if so required. The handle returned by this call is input as an essential argument for many of the APIs described for this module.

Arguments

            pEdmaObj         pointer to the object that holds reference to the
                             channel instance of the Specified DMA 
            edmaNum          Instance of EDMA whose channel is requested
            pChAttr          Channel Attributes which describe the channel to
                             be opened.
            status           Status of the function call
     

Return Value
Success - Channel Handle
Error - NULL

Pre Condition
CSL_edma3Init(), CSL_edma3Open() must be invoked successfully in that order before this API can be invoked

Post Condition EDMA channel object structure is populated

Affects
None

Example

            CSL_Edma3Handle             hModule;
            CSL_Edma3Obj                edmaObj;
            CSL_Edma3ChannelObj         chObj;
            CSL_Edma3ChannelHandle      hChannel;
            CSL_Edma3ChannelAttr        chAttr;
            CSL_Status                  status;
        
            // Module Initialization
            CSL_edma3Init(NULL);
            
            // Module Level Open    
            hModule = CSL_edma3Open(&edmaObj, 0, NULL,&status);

            // Channel 0 Open in context of Shadow region 0
            chAttr.regionNum = CSL_EDMA3_REGION_0;
            chAttr.chaNum    = 0;
            hChannel = CSL_edma3ChannelOpen(&chObj, 0, &chAttr, &status);
            ... 
    

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