eeprom.c

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#include "fx2.h"
#include "fx2regs.h"
#include "io.h"

#define SERIAL_ADDR		0x50

BYTE			DB_Addr;					//TPM Dual Byte Address stat
BYTE			I2C_Addr;					//TPM I2C address


void EEPROMInit()
{
	EZUSB_InitI2C();	
	// Determine I2C boot eeprom device address; addr = 0x0 for 8 bit addr eeproms (24LC00)
	I2C_Addr = SERIAL_ADDR | ((I2CS & 0x10) >> 4); // addr=0x01 for 16 bit addr eeprom (LC65)
	// Indicate if it is a dual byte address part
	DB_Addr = (BOOL)(I2C_Addr & 0x01); //TPM: ID1 is 16 bit addr bit - set by rocker sw or jumper
}

void EEPROMWriteByte(WORD addr, BYTE value)
{
	BYTE		i = 0;
	BYTE xdata 	ee_str[3];

	if(DB_Addr)
		ee_str[i++] = MSB(addr);

	ee_str[i++] = LSB(addr);
	ee_str[i++] = value;

	EZUSB_WriteI2C(I2C_Addr, i, ee_str);
   EZUSB_WaitForEEPROMWrite(I2C_Addr);
}


void EEPROMWrite(WORD addr, BYTE length, BYTE xdata *buf)
{
	BYTE	i;
	
	for(i = 0; i < length; i++)
		EEPROMWriteByte(addr++,buf[i]);
}

void EEPROMRead(WORD addr, BYTE length, BYTE xdata *buf)
{
	BYTE		i = 0;
	BYTE		j = 0;
	BYTE xdata 	ee_str[2];

	if(DB_Addr)
		ee_str[i++] = MSB(addr);

	ee_str[i++] = LSB(addr);

	EZUSB_WriteI2C(I2C_Addr, i, ee_str);

	EZUSB_ReadI2C(I2C_Addr, length, buf);
}