csl_reszopen.c

来自「TI达芬奇dm644x各硬件模块测试代码」· C语言 代码 · 共 66 行

/** @file csl_reszOpen.c
 *
 *    @brief    File for functional layer of CSL API @a CSL_reszOpen()
 *
 *  Description
 *    - The @a CSL_reszOpen() function definition & it's associated functions
 *
 *  Modification 1
 *    - Created on: 10/12/2004
 *    - Reason:       Created the sources
 *
 *  @date 12th October, 2004
 *  @author Sandeep Tiwari.
 */

#include <csl_resz.h>
#include <_csl_resource.h>


#pragma CODE_SECTION (CSL_reszOpen, ".text:csl_section:resz");

extern void _CSL_reszGetAttrs(CSL_ReszNum reszNum , CSL_ReszHandle hResz);

/** @brief Reserves the specified RESZ for use. 
 */
CSL_ReszHandle CSL_reszOpen (
    /** Pointer to the object that holds reference to the
     *  instance of RESZ requested after the call 
	 */
    CSL_ReszObj              *hReszObj,
    /** Instance of Resz to which a handle is requested 
	 */
    CSL_ReszNum              reszNum,
    /** Specifies if RESZ 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_ReszNum reszInst;
    CSL_ReszHandle hResz = (CSL_ReszHandle)NULL;

    hReszObj->openMode = openMode;
    
    if (reszNum >= 0 ) {
        _CSL_reszGetAttrs(reszNum, hReszObj);
        hResz = (CSL_ReszHandle)_CSL_certifyOpen((CSL_ResHandle)hReszObj, status);
    }
    else {
		for(reszInst=(CSL_ReszNum)0;reszInst < (CSL_ReszNum)CSL_RESZ_PER_CNT;++reszInst){
			_CSL_reszGetAttrs(reszInst, hReszObj);
            hResz = (CSL_ReszHandle)_CSL_certifyOpen((CSL_ResHandle)hReszObj, status);
            if (*status == CSL_SOK) 
                break;
        }
        if (reszInst == CSL_RESZ_PER_CNT) 
            *status = CSL_ESYS_OVFL;
    }

    return hResz;
}