sweep.c

VIA VT6524 8口网管交换机源码

/*
 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
 * All rights reserved.
 *
 * This software is copyrighted by and is the sole property of
 * VIA Networking Technologies, Inc. This software may only be used
 * in accordance with the corresponding license agreement. Any unauthorized
 * use, duplication, transmission, distribution, or disclosure of this
 * software is expressly forbidden.
 *
 * This software is provided by VIA Networking Technologies, Inc. "as is"
 * and any express or implied warranties, including, but not limited to, the
 * implied warranties of merchantability and fitness for a particular purpose
 * are disclaimed. In no event shall VIA Networking Technologies, Inc.
 * be liable for any direct, indirect, incidental, special, exemplary, or
 * consequential damages.
 *
 *
 * File:    sweep.c
 *
 * Purpose: EEPROM hardware accessing functions
 *
 * Author:  Tevin Chen
 *
 * Date:    Jan 08, 2002
 *
 * Functions:
 *
 * Revision History:
 *
 */


#if !defined(__SWITCH_H__)
#include "switch.h"
#endif
#if !defined(__SWREG_H__)
#include "swreg.h"
#endif




/*---------------------  Static Definitions  ------------------------*/
#define EEP_CMD_RD              0xA1
#define EEP_CMD_WR              0xA0

#define PTN_STATUS_OK           0x02
#define PTN_STATUS_ERR          0x04

/*---------------------  Static Types  ------------------------------*/

/*---------------------  Static Macros  -----------------------------*/

/*---------------------  Static Classes  ----------------------------*/

/*---------------------  Static Variables  --------------------------*/

/*---------------------  Static Functions  --------------------------*/

/*---------------------  Export Variables  --------------------------*/




BOOL SWEEP_bReadB(UINT16 wAddr, PBYTE pbyData) DIRECT_FUNTYPE_REENT
{
    // Set address
    SWREG_vWriteB(EEPROM_ADDR, (BYTE)(wAddr & 0xFF));
    // Set device id and issue read command
    // (0~255 => dev id = 0; 256~511 => dev id = 1....)
    SWREG_vWriteB(EEPROM_DEV_ADDR, ((BYTE)(wAddr >> 7)) & 0x0E | EEP_CMD_RD );

    // loop to wait for EEPROM operation complete
    if (!SWREG_bWaitStatus(EEPROM_STATUS, PTN_STATUS_OK, TRUE))
        return FALSE;

    // get data and return true
    SWREG_vReadB(EEPROM_DATA, pbyData);
    return TRUE;
}


BOOL SWEEP_bWriteB(UINT16 wAddr, BYTE byData) DIRECT_FUNTYPE_REENT
{
    // Set address
    SWREG_vWriteB(EEPROM_ADDR, (BYTE)(wAddr & 0xFF));
    // Set written value
    SWREG_vWriteB(EEPROM_DATA, byData);
    // Set device id and issue write command
    // (0~255 => dev id = 0; 256~511 => dev id = 1....)
    SWREG_vWriteB(EEPROM_DEV_ADDR, ((BYTE)(wAddr >> 7)) & 0x0E | EEP_CMD_WR );

    // loop to wait for EEPROM operation complete
    if (!SWREG_bWaitStatus(EEPROM_STATUS, PTN_STATUS_OK, TRUE))
        return FALSE;

    return TRUE;
}