csl_h3aopen.c

TI达芬奇dm644x各硬件模块测试代码

/** @file csl_h3aOpen.c
 *
 *    @brief    File for functional layer of CSL API @a CSL_h3aOpen()
 *
 *  Description
 *    - The @a CSL_h3aOpen() function definition & it's associated functions
 *
 *  Modification 1
 *    - Created on: 10/18/2004
 *    - Reason:       Created the sources
 *
 *  @date 18th October, 2004
 *  @author Sandeep Tiwari.
 */

#include <csl_h3a.h>
#include <_csl_resource.h>


#pragma CODE_SECTION (CSL_h3aOpen, ".text:csl_section:h3a");

extern void _CSL_h3aGetAttrs(CSL_H3aNum h3aNum , CSL_H3aHandle hH3a);

/** @brief Reserves the specified H3A for use. 
 */
CSL_H3aHandle CSL_h3aOpen (
    /** Pointer to the object that holds reference to the
     *  instance of H3A requested after the call 
	 */
    CSL_H3aObj              *hH3aObj,
    /** Instance of H3a to which a handle is requested 
	 */
    CSL_H3aNum              h3aNum,
    /** Specifies if H3A 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_H3aNum h3aInst;
    CSL_H3aHandle hH3a = (CSL_H3aHandle)NULL;

    hH3aObj->openMode = openMode;
    
    if (h3aNum >= 0 ) {
        _CSL_h3aGetAttrs(h3aNum, hH3aObj);
        hH3a = (CSL_H3aHandle)_CSL_certifyOpen((CSL_ResHandle)hH3aObj, status);
    }
    else {
		for(h3aInst=(CSL_H3aNum)0;h3aInst < (CSL_H3aNum)CSL_H3A_PER_CNT;++h3aInst){
			_CSL_h3aGetAttrs(h3aInst, hH3aObj);
            hH3a = (CSL_H3aHandle)_CSL_certifyOpen((CSL_ResHandle)hH3aObj, status);
            if (*status == CSL_SOK) 
                break;
        }
        if (h3aInst == CSL_H3A_PER_CNT) 
            *status = CSL_ESYS_OVFL;
    }

    return hH3a;
}