csl_ccdcopen.c

TI达芬奇dm644x各硬件模块测试代码

/** @file csl_ccdcOpen.c
 *
 *    @brief    File for functional layer of CSL API @a CSL_ccdcOpen()
 *
 *  Description
 *    - The @a CSL_ccdcOpen() function definition & it's associated functions
 *
 *  Modification 1
 *    - Created on: 10/21/2004
 *    - Reason:       Created the sources
 *
 *  @date 21st Oct, 2004
 *  @author Santosh Narayanan.
 */

#include <csl_ccdc.h>
#include <_csl_resource.h>


#pragma CODE_SECTION (CSL_ccdcOpen, ".text:csl_section:ccdc");

extern void _CSL_ccdcGetAttrs(CSL_CcdcNum ccdcNum , CSL_CcdcHandle hCcdc);

/** @brief Reserves the specified CCDC for use. 
 */
CSL_CcdcHandle CSL_ccdcOpen (
    /** Pointer to the object that holds reference to the
     *  instance of CCDC requested after the call 
	 */
    CSL_CcdcObj              *hCcdcObj,
    /** Instance of CCDC to which a handle is requested 
	 */
    CSL_CcdcNum              ccdcNum,
    /** Specifies if CCDC should be opened with exclusive or
     *  shared access to the associate pins 
	 */
    CSL_OpenMode            openMode,
    /** This returns the status (success/errors) of the call 
	 */
    CSL_Status              *status
	){

    CSL_CcdcNum ccdcInst;
    CSL_CcdcHandle hCcdc = (CSL_CcdcHandle)NULL;

    hCcdcObj->openMode = openMode;
    
    if (ccdcNum >= 0 ) {
        _CSL_ccdcGetAttrs(ccdcNum, hCcdcObj);
        hCcdc = (CSL_CcdcHandle)_CSL_certifyOpen((CSL_ResHandle)hCcdcObj, status);
    }
    else {
		for(ccdcInst=(CSL_CcdcNum)0;ccdcInst < (CSL_CcdcNum)CSL_CCDC_PER_CNT;++ccdcInst){
			_CSL_ccdcGetAttrs(ccdcInst, hCcdcObj);
            hCcdc = (CSL_CcdcHandle)_CSL_certifyOpen((CSL_ResHandle)hCcdcObj, status);
            if (*status == CSL_SOK) 
                break;
        }
        if (ccdcInst == CSL_CCDC_PER_CNT) 
            *status = CSL_ESYS_OVFL;
    }

    return hCcdc;
}