/************************************************************************
                 Grt-Mars, Inc.
                 240 Sheffield Str.
                 Mountainside, New Jersey 07092

PROJECT  : ProEX
Author   : Peter Strezev
*******************************************************************************
Functions to handle storage and retrieval of Irrigation programs in FLASH
*******************************************************************************/
#include <stdio.h>
#include <string.h>
#include "EE_Dataset.h"
#include "FlashEE.h"

/* --- Table of 16-bit virtual addresses (VA) for all variables. Each VA consists of 2 parts: Program Number (0..5) in the --- */
/* --- upper byte, variable number (0..76) in the lower byte. --- */
/*
1k的空间，最大存储地址是512，即0、2...1024
将地址分成8部分，则:
0~128:  		0\2\4...\128 + 0x000		64byte
130~258:	0\2\4...\128 + 0x100		64byte
...
896~1024:	0\2\4...\128 + 0x800		64byte
*/
const unsigned short VirtAddVarTab[NumbOfVar] =
{
    //52byte -> (0~51)*2
    0, 										//Net+DNSFlag
    2,	4, 									//ComGateway[4]		--2个地址
    6,	8,	10,	12,	14,	16,	18,	20,	22, 24,	//SoctType+SysIP[31] 	--16个地址
    26,	28,	30,	32,	34,	36,
    38,	40,									//DNSPort[4]			--2个地址
    42,										//CTime+Cir1Probe
    44,										//Cir2Probe+Cir3Probe
    46,										//Cir4Probe+AppAddr
    48,										//UpDateStep+WorkMode
    50,										//u16 GYMAX;
	52,										//u16 QYMAX;
	54										//u16 GLMAX;
};


void EEprom_Init ( void )
{
    FLASH_Unlock();
    EE_Init();
    FLASH_Lock();
}

void LoadDtuConfig ( unsigned short addr )
{
    char ConfigBuffer[sizeof ( SysPara )];
    unsigned short Temp, VAddr;
    int i;
    tEEstat ErrCode;

    FLASH_Unlock();

    for ( i = 0; i <= sizeof ( SysPara ) - 2; i += 2 )
    {
        VAddr = addr + i;
        ErrCode = ( tEEstat ) EE_ReadVariable ( VAddr, &Temp );

        if ( ErrCode == EE_DONE )
        {
            ConfigBuffer[i] = ( char ) ( Temp >> 8 );
            ConfigBuffer[i + 1] = ( char ) ( Temp & 0xFF ); 		//todo What if we overflow the buffer (if size is odd?)
        }
    }

    FLASH_Lock();

    memcpy ( &SysPara, &ConfigBuffer, sizeof ( SysPara ) );
}

void SaveDtuConfig ( unsigned short addr )
{
    char ConfigBuffer[ ( sizeof ( SysPara ) + 1 )];
    unsigned short Temp, VAddr, Data;
    int i;
    tEEstat ErrCode;

    memcpy ( &ConfigBuffer, &SysPara, sizeof ( SysPara ) );

    FLASH_Unlock();

    for ( i = 0; i <= sizeof ( SysPara ) - 2; i += 2 )
    {
        VAddr = addr + i;
        Data = ( unsigned short ) ( ConfigBuffer[i] << 8 );
        Data |= ( unsigned short ) ( ConfigBuffer[i + 1] );

        ErrCode = ( tEEstat ) EE_ReadVariable ( VAddr, &Temp );

        if ( ( ErrCode == EE_BADVAR ) || ( Data != Temp ) )	//Only save new variables or if data is different
        {
            __disable_interrupt();
            ErrCode = ( tEEstat ) EE_WriteVariable ( VAddr, Data );
            __enable_interrupt();
        }
    }

    FLASH_Lock();
}