csl_atawritecontrolreg.c

来自「TI达芬奇dm644x各硬件模块测试代码」· C语言 代码 · 共 83 行

/*  ============================================================================
 *   Copyright (c) Texas Instruments Inc 2002, 2003, 2004, 2005
 *
 *   Use of this software is controlled by the terms and conditions found in the
 *   license agreement under which this software has been supplied.
 *   ===========================================================================
 */

/** @file  csl_ataWriteControlReg.c
 *
 *  @brief File for functional layer of CSL API CSL_ataWriteControlReg()
 *
 *  Path: \\(CSLPATH)\\ipmodules\\ata\\src
 *
 */

/* =============================================================================
 *  Revision History
 *  ===============
 *  08-Oct-2004 kpn Updated according to review comments
 *  24-Sep-2004 kpn Updated according to CSL Upgradation guidelines.
 *  ============================================================================
 */

#include <csl_ata.h>

/** ============================================================================
 *   @n@b CSL_ataWriteControlReg
 *
 *   @b Description
 *   @n It writes into the control register.
 *
 *   @b Arguments
 *   @verbatim
            hAta            Handle to the ATA

            reg             CSL_AtaCtlRegWr

            regVal          Uint16
     @endverbatim
 *
 *   <b> Return Value </b>
 *   @n  Uint16  regVal
 *
 *   <b> Pre Condition </b>
 *   @n  None
 *
 *   <b> Post Condition </b>
 *   @n  The control register is loaded with regVal.
 *
 *   @b Modifies
 *   @n Control register
 *
 *   @b Example
 *   @verbatim
            CSL_AtaHandle             hAta;
            CSL_AtaCtlRegWr           reg;
            Uint16                    regVal;
            ...

            regVal = CSL_ataWriteControlReg (hAta, reg, regVal);
            ...

     @endverbatim
 *  ============================================================================
 */
Uint16 CSL_ataWriteControlReg (
    CSL_AtaHandle               hAta,
    CSL_AtaCtlRegWr             reg,
    Uint16                      regVal
)
{
    register Uint8 volatile * addr = 0;

    addr = (hAta->ataNum == CSL_ATA_PRIMARY) ?
           CSL_ATA_CTLREGS_PRIMARY : CSL_ATA_CTLREGS_SECONDARY;

    addr[reg] = regVal;

    return regVal;
}