25AA02E48和PIC32问题

问候语！首先，我要注意的是，我有一个工作电路板25AA02E48和PIC18。所以现在我改变了控制器，我不能从这个EEPROM读取任何东西。我在CS上有上拉电阻，其他SPI引脚直接连接到UC。我用同样的问题来读/写：WP和保持线通过4.7K电阻连接到VCC。问题是SDI线（EEPROM的SDO）总是保持高电平。每卖出一个，就有255个。我试图在同一线路上设置一个下拉电阻-线路保持在低状态。你能帮助我吗？我可以看到逻辑分析仪上的所有行，我肯定我正在发送正确的值。只是EEPROM不响应！有什么建议吗？谢谢！



      以下为原文

    Greetings! First I want to notice I have a working PCB with 25AA02E48 and PIC18. So now I changed the controller and I can`t read anything from this EEPROM. I have pull-up resistor on the CS and the other SPI pins are connect straight to the uC. I`m using the same problem for read/write:
void EEPROMInit()
{
EEPROM_CS_Init();
    EEPROM_CS_Set(0);
    Delay_ms(1);
    EEPROM_CS_Set(1);
}

void WriteEnableSequence()
{
EEPROM_CS_Set(0);
Delay_ms(5);
spi_xfer(EEPROMWREN);
Delay_ms(5);
EEPROM_CS_Set(1);
    Delay_ms(1);
}

void WriteDisableSequence()
{
EEPROM_CS_Set(0);
Delay_ms(5);
spi_xfer(EEPROMWRDI);
Delay_ms(5);
EEPROM_CS_Set(1);
    Delay_ms(1);
}

void WriteByteToAddress(unsigned char data,unsigned char address)
{
WriteEnableSequence();
EEPROM_CS_Set(0);
Delay_ms(5);
spi_xfer(EEPROMWRITE);
    Delay_us(50);
spi_xfer(address);
    Delay_us(50);
spi_xfer(data);
Delay_ms(5);
EEPROM_CS_Set(1);
    Delay_ms(1);
WriteDisableSequence();
Delay_ms(5);
}

unsigned char ReadDataFromAddress(unsigned char address)
{
int data;
EEPROM_CS_Set(0);
//__delay_ms(5);
    Delay_us(50);
spi_xfer(EEPROMREAD);
    Delay_us(50);
spi_xfer(address);
    Delay_us(50);
data=spi_xfer(0);
EEPROM_CS_Set(1);
Delay_ms(5);
return data;
}

WP and HOLD lines are connected to Vcc through 4.7k resistors.
The problem is the SDI line(SDO of the EEPROM) always stays high! As there is 255 in every sell. I tried to put a pull down resistor on the same line -> the line stays in low state... Can you help me? I can see all the lines on the logic analyzer and I`m positive I`m transmitting the correct values. Just the EEPROM doesn`t respond!
Any suggestions?
Thanks!