Serial Flash EEPROM interfacing

[bianchi77]

Hi guys,

Do you guys have an experience for interfacing 25L640 with 89S52 ?
Can you tell me the link for code and the circuit schematic ?

Thanks

 

[bianchi77]

can I run the code that I load from serial EEPROM, can you tell me code ?
Thanks

 

[Easyrider83]

void EEPROM_WREN (void)
{
	PIN_OFF(CS_PIN);
	SPI_Read(SPI_EEPROM_WREN_CMD);
	PIN_ON(CS_PIN);
}

void EEPROM_Write(unsigned int Adress, unsigned char Data)
{
	PIN_OFF(CS_PIN);
	SPI_Read(SPI_EEPROM_WRITE_CMD);
	SPI_Read((0xFF00&Adress)>>8);
	SPI_Read(0xFF&Adress);
	SPI_Read(Data);
	PIN_ON(CS_PIN);
	delay_ms(SPI_EEPROM_WRITE_TIME);
}

unsigned char EEPROM_Read(unsigned int Adress)
{
	unsigned char tmp;
	PIN_OFF(CS_PIN);
	SPI_Read(SPI_EEPROM_READ_CMD);
	SPI_Read((0xFF00&Adress)>>8);
	SPI_Read(0xFF&Adress);
	tmp=SPI_Read(0xFF);
	PIN_ON(CS_PIN);
	return tmp;
}

And header:

#define SPI_EEPROM_READ_CMD			0x03
#define SPI_EEPROM_WRITE_CMD		0x02
#define SPI_EEPROM_WRDI_CMD			0x04
#define SPI_EEPROM_WREN_CMD			0x06
#define SPI_EEPROM_RDSR_CMD			0x05
#define SPI_EEPROM_WRSR_CMD			0x01

#define SPI_EEPROM_WRITE_TIME		10


void EEPROM_Write(unsigned int Adress, unsigned char Data);
void EEPROM_WREN (void);
unsigned char EEPROM_Read(unsigned int Adress);