csl_pscopen.c

TI达芬奇dm644x各硬件模块测试代码

/*   ==========================================================================
 *   Copyright (c) Texas Instruments Inc , 2005
 *
 *   Use of this software is controlled by the terms and conditions found
 *   in the license agreement under which this software has been supplied
 *   provided
 *   ==========================================================================
*/
/** @file csl_pscOpen.c
 *
 *  @brief    File for functional layer of CSL API @a CSL_pscOpen()
 *
 *  Description
 *    - The @a CSL_pscOpen() function definition & it's associated functions
 *
 *  @date 6 June, 2005
 *  @author Lawrence Ronk
 */

#include <csl_psc.h>

#pragma CODE_SECTION (CSL_pscOpen, ".text:csl_section:psc");
/**
    \brief Open PSC
    \param hPscObj Pointer to the handle object - to be allocated by the user
    \param pscNum  Specifies the instance of PSC to be opened
    \param openMode Specifies if PSC should be opened with exclusive OR
                    share access to the associate pins 
    \param hwSetup  If a valid structure is passed (not @a NULL), then
                    the @a CSL_PscHwSetup() is called with this parameter 
    \param status   Pointer to the variable that holds the holds the status of 
                    the open call		
		    
    \return Handle @a CSL_PscHandle to the requested instance of
            PSC if the call is successful, otherwise, a @a NULL is returned     
    \see 
*/
CSL_PscHandle CSL_pscOpen ( CSL_PscObj *pPscObj,
                              CSL_InstNum pscNum,
                              CSL_PscParam *pPscParam,
                              CSL_Status *pStatus ){

                              
    CSL_Status            status;
    CSL_PscHandle         hPsc;
    CSL_PscBaseAddress    baseAddress;


    status = CSL_pscGetBaseAddress(pscNum, pPscParam, &baseAddress);

    if (status == CSL_SOK) {
    
        pPscObj->regs = baseAddress.regs;
        pPscObj->perNum = (CSL_InstNum)pscNum;
        hPsc = (CSL_PscHandle)pPscObj;
    } 
    else {
        pPscObj->regs = (CSL_PscRegsOvly)NULL;
        pPscObj->perNum = (CSL_InstNum)-1;
        hPsc = (CSL_PscHandle)NULL;
    }

    if (pStatus) {
        *pStatus = status;
    }
    
    return hPsc;
}