/********************************************************************
EEPROM.C
Read and write the 24c02 EEPROM
********************************************************************/
#include "EEPROM.h"
#include "Moto.h"
/*============================================================================
** PROJECT: = -
** MODULE = EEPROM.c
** SHORT DESC. = EEPROM read and write
** DEVICE = uPD78F0822B
** VERSION = SW-Dragon-T1.0
** DATE = 08/31/06
** LAST CHANGE = -
** ===========================================================================
** Description: -This program includes functions that read and write eeprom.
**
** ===========================================================================
** Environment: Device: uPD78F0822B
** Assembler: RA78k0 Version 3.8
** C-Compiler: CC78K0 Version 3.7
** IDE: PM plus
**
** ===========================================================================
** By: tian hua ,Novalux Shanghai
**
** ===========================================================================
** Changes: -
**============================================================================
*/
#define RUNFLAG 0x55 // indictor if the system is running for the first time.
#define SDA P11.1
#define SCL P11.2
#define SDADir PM11.1
#define SCLDir PM11.2
#define SDAFuction PF11.1
#define SCLFuction PF11.2
#define Write24c02 0xA0
#define Read24c02 0xA1
bit bACK;
UINT uiPulsePerMile=4840;///5850;
UCHAR ucPulsePerRotation=20;
UINT uiFuelWarnHigh=105;
UINT uiFuelWarnLow=102;
UINT uiWaterWarnHigh=37;
UINT uiWaterWarnLow=34;
UCHAR ucversion;
UCHAR ucMeterName[5];
UCHAR ucSParas[SPARANUM];
UCHAR ucRParas[RPARANUM];
UCHAR ucWParas[WPARANUM];
UCHAR ucFParas[FPARANUM];
void delayI(UINT i)
{
while(--i);
}
/************************************************************************************************************************
## function name: I2C_Delay()
## parameter : NULL
## return : NULL
## description: Delay I2C bus clock ,so the data on the bus can be stable
*************************************************************************************************************************/
void I2C_Delay()
{
#ifndef I2C_FAST
NOP();NOP();NOP();NOP();NOP();NOP();NOP();NOP();NOP();NOP();
#endif
NOP();NOP();NOP();NOP();NOP();NOP();NOP();NOP();NOP();NOP();
// NOP();NOP();NOP();NOP();NOP();NOP();NOP();NOP();NOP();NOP();
}
/************************************************************************************************************************
## function name: I2C_Init()
## parameter : NULL
## return : NULL
## description: Initialize the I2C bus state
*************************************************************************************************************************/
void I2C_Init()
{
SDAFuction = 0; //set SDA to port mode
SCLFuction = 0; //set SCL to port mode
SCLDir = OUTPUT; //set SCL to output mode
SCL = 0; //set SCL to low level
SDADir = OUTPUT; //set SDA to output mode
SDA = 0; //set SDA to low level
bACK = 0;
PM3.0=1;
}
/************************************************************************************************************************
## function name: I2C_Start()
## parameter : NULL
## return : NULL
## description: generate the bus start signal
*************************************************************************************************************************/
void I2C_Start()
{
SDA = 1;
I2C_Delay();
SCL = 1;
I2C_Delay();
SDA = 0;
I2C_Delay();
SCL =0;
I2C_Delay();
}
/************************************************************************************************************************
## function name: I2C_Stop()
## parameter : NULL
## return : NULL
## description: generate the bus stop signal
*************************************************************************************************************************/
void I2C_Stop()
{
SDA = 0;
I2C_Delay();
SCL = 1;
I2C_Delay();
SDA = 1;
I2C_Delay();
SCL = 0;
}
/************************************************************************************************************************
## function name: I2C_SendByte()
## parameter : c: the data to send
## return : NULL
## description: send 8 bits to bus
*************************************************************************************************************************/
void I2C_SendByte(UCHAR c)
{
UCHAR _ucBitCount;
for(_ucBitCount=0;_ucBitCount<8;_ucBitCount++)
{
if((c<<_ucBitCount)&0x80)
SDA=1;
else
SDA=0;
I2C_Delay();
SCL=1;
I2C_Delay();
SCL=0;
}
I2C_Delay();
SDADir = INPUT; //change the SDA to input mode
I2C_Delay();
SCL = 1;
I2C_Delay();
if(SDA==1)
bACK = 0;
else
bACK = 1;
SCL = 0;
I2C_Delay();
SDADir = OUTPUT; //change the SDA to output mode
}
/************************************************************************************************************************
## function name: I2C_ReadByte()
## parameter : NULL
## return : the received 8 bits data
## description: read 8 bits from the bus
*************************************************************************************************************************/
UCHAR I2C_ReadByte()
{
UCHAR _ucRetc;
UCHAR _ucBitCount;
_ucRetc = 0;
SDADir = INPUT; // set SDA to input mode
NOP();
for(_ucBitCount=0;_ucBitCount<8;_ucBitCount++)
{
I2C_Delay();
SCL = 0;
I2C_Delay();
SCL=1;
I2C_Delay();
_ucRetc = _ucRetc<<1;
if(SDA==1)
_ucRetc |= 0x01;
NOP();
}
I2C_Delay();
SCL = 0;
NOP();
SDADir = OUTPUT; //set SDA to output mode
I2C_Delay();
return(_ucRetc);
}
/************************************************************************************************************************
## function name: bACK_To_I2c()
## parameter : the bACK signal to send
bACK=1: send NO_bACK signal to bus
bACK=0: send bACK signal to bus
## return : NULL
## description: send bACK to bus
*************************************************************************************************************************/
void ACK_To_I2c(UCHAR bACK)
{
if(bACK == 0)
SDA = 0;
else
SDA = 1;
I2C_Delay();
SCL = 1;
I2C_Delay();
SCL =0;
I2C_Delay();
}
/************************************************************************************************************************
## function name: WriteByteTo24c02()
## parameter :
Address: the address to write ;
Data: the data to write;
## return : state
1 : success ;
0 : fail
## description: write a byte data to 24c02
*************************************************************************************************************************/
UCHAR WriteByteTo24c02(UCHAR Address,UCHAR Data)
{
UCHAR _i=0;
I2C_Start();
do
{
_i++;
if(_i>10)
return (FAIL);
I2C_SendByte(Write24c02);
}while(bACK==0);
I2C_SendByte(Address);
if(bACK==0)
return(FAIL);
I2C_SendByte(Data);
if(bACK==0)
return(FAIL);
I2C_Stop();
return(SUCCESS);
}
/************************************************************************************************************************
## function name: ReadB
