externflashdev.c

uClinux下

/*================================================================================
                                                                               
Module Name:  Externflashapp.c

General Description: Read/Write event from/to flash

==================================================================================
                     Honeywell Confidential Proprietary
               ACS - Security (Asia Pacific) R&D Software Operations
               (c) Copyright Honeywell 2005, All Rights Reserved
 
Revision History:
                            Modification     Tracking
Author                 Date        Ver Number     Description of Changes
----------------   ------------    ----------   -------------------------
Developer chenkang      06/06/2006     ver0.0.1     create   


Portability: Indicate if this module is portable to other compilers or 
platforms. If not, indicate specific reasons why is it not portable.

==================================================================================
                                 INCLUDE FILES
================================================================================*/
#include "externflashdev.h"

#define  GetAddr(addr)	(volatile uint16  *)(FLASH_ADDR|(addr<<1))
#define  GetStartAddr(addr)    (volatile uint16  *)(FLASH_START_ADDR|(addr<<1))

/*********************************************************************************************************
** Function name: WordRead
** Descriptions: 读取指定地址(Flash内部的)上的半字(16位)数据。      
** Input: Addr		编程地址(SST39VF1601内部地址)	
** Output: 返回值即是读出的数据
** Created by: 黄绍斌
** Created Date: 2006-01-05 
**-------------------------------------------------------------------------------------------------------
** Modified by:
** Modified Date: 
**------------------------------------------------------------------------------------------------------
********************************************************************************************************/
uint16  WordRead(uint32 Addr) 
{	
    volatile uint16  *ip;
	
	ip = GetAddr(Addr);
	return(*ip);
}

int read_config_data_from_exflash(FLASH_CONFIG_SECTOR_S * pstrInData)
{
    uint16 ausbuf[CONFIG_SIZE/2];
    uint32 uladdr;
    int i;
    uladdr = SECTOR_3M_START_SECTOR + CONFIG_SECTOR_ID * SECTOR_SIZE;
    
    for(i = 0; i < (CONFIG_SIZE)/2; i++)
    { 
        ausbuf[i] = WordRead(uladdr + i);
    }	
    memcpy((uint8 *)pstrInData,(uint8 *)ausbuf,CONFIG_SIZE);
    return (0);
}