dataper_api.c

zilog的实时操作系统RZK,可以移植到多种处理器上

/*
 * File       : DataPer_API.c
 * Description: This file contains the data persistence APIs
 *				data persistance of different values.
 * Author     : Mahadev K C
 * Created on : 3-FEB-2005
 *
 * Copyright 2004-2005 ZiLOG Inc.  ALL RIGHTS RESERVED.
 *
 * This file contains unpublished confidential and proprietary information
 * of ZiLOG, Inc.
 * NO PART OF THIS WORK MAY BE DUPLICATED, STORED, PUBLISHED OR DISCLOSED 
 * IN ANY FORM WITHOUT THE PRIOR WRITTEN CONSENT OF ZiLOG, INC.
 * This is not a license and no use of any kind of this work is authorized
 * in the absence of a written license granted by ZiLOG, Inc. in ZiLOG's 
 * sole discretion 
 */


/*
 * standard header files
 */
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
//#include <defines.h>

/*
 * system header files
 */
#include "DataPerStruct.h"


/*
 * API prototypes:
 */
/*
 * Function name: GetDataPersistence
 * Description:   This function reads the flash block area for Data
 *                persistence values
 * Inputs:        pDataPer - Data persistence structure
 * Outputs:       None
 * Return values: 0 - Success, non-zero error
 * Additional information: 
 */

INT8 GetDataPersistence( PDATA_PER_t p_data_per )
#ifdef _IAR_CODE
@ "DATA_PER_RAM"
#endif
{
	UINTRMASK intr_mask ;

	if( NULL == p_data_per )
		return -1 ;

	/*
	 * disable the interrupts as we do not want any code to be executed 
	 * from flash other than this function
	 */
	intr_mask = Per_DI() ;

	/*
	 * Now initialize the flash block configured in the structure.
	 */
	g_data_per_cfg.pfn_dev_init( g_data_per_cfg.p_start_addr, g_data_per_cfg.ul_size ) ;

	/*
	 * Now read the data from the flash block configured
	 */
	g_data_per_cfg.pfn_dev_read( g_data_per_cfg.p_start_addr, p_data_per, sizeof( DATA_PER_t ) ) ;

	g_data_per_cfg.pfn_dev_close() ;

	/*
	 * enable the interrupts
	 */

	Per_EI( intr_mask ) ;
	return 0 ;
}


/*
 * Function name: SetDataPersistence
 * Description:   This function erases the appropriate flash block and
 *                writes the data structure onto the flash
 * Inputs:        pDataPer - Data persistence structure
 * Outputs:       None
 * Return values: 0 - Success, non-zero error
 * Additional information: 
 */
INT8 SetDataPersistence( PDATA_PER_t p_data_per )
#ifdef _IAR_CODE
@ "DATA_PER_RAM"
#endif
{
	UINTRMASK intr_mask ;

	if( NULL == p_data_per )
		return -1 ;

	/*
	 * disable the interrupts as we do not want any code to be executed 
	 * from flash other than this function
	 */
	intr_mask = Per_DI() ;

	/*
	 * Now erase the flash block configured in the structure.
	 */
	g_data_per_cfg.pfn_dev_init( g_data_per_cfg.p_start_addr, g_data_per_cfg.ul_size ) ;
	g_data_per_cfg.pfn_dev_erase( g_data_per_cfg.p_start_addr, g_data_per_cfg.ul_size ) ;

	/*
	 * Now write the data into the flash block configured
	 */
	g_data_per_cfg.pfn_dev_write( g_data_per_cfg.p_start_addr, p_data_per, sizeof( DATA_PER_t ) ) ;

	g_data_per_cfg.pfn_dev_close() ;

	/*
	 * enable the interrupts
	 */

	Per_EI( intr_mask ) ;

	return 0 ;
}