从串行EEPROM问题中读取页面重新运行程序会挂起

大家好，我使用24C04串行EEPROM集成电路。从PIC16LF1847通信。我能写个人数据和页面（最多16字节）。但是，阅读中的问题，尤其是网页阅读。如果我读完整页，即16字节，我已经写了16字节itoEEPROM。即使在复位PIC单片机之后，我也能一直读取数据。但是，如果我只读取部分页面数据，例如6字节，它只读取一次数据。如果重置处理器并重新运行程序，它会挂起。因为设置了一个位。在发出任何命令之前，我正在检查ASPEN和SSPXCON1寄存器的其他位，以了解I2C状态。当我看到SSP1BUF时，它包含了我最初提供的读取EEPROM的地址。如何解决这个问题，我需要您选择合适的串行EEPROM来满足我的以下要求。谢谢，PMK



      以下为原文

    Hi all,

I am using 24C04 serial EEPROM IC. Communicating from PIC16LF1847. I can able to write Individual data and Page (up to 16 bytes). But, a problem in reading, especially Page reading. If I read full page i.e. 16 bytes, I have written 16 bytes into EEPROM. I can able to read the data all the time even after resetting the PIC MCU. But, if I read only partial page data for example 6 bytes, it reads the data but only one time. If reset the processor and re-run the program, it hangs. Because ACKEN bit is set. I am checking the ACKEN and other bits of SSPxCON1 register to know the i2c status before issuing any commands. When I see the SSP1BUF, it contains the address I initially supplied to read the EEPROM. How to resolve the issue.

//WAIT UNTIL I2C FREE
void I2C_Master_Wait(void){
  while ((SSP1STAT & 0x04) || (SSP1CON2 & 0x1F));
// while (SSP1STAT & 0x04);
}

char strData[16];
char Temp;
//Read Data
unsigned char I2C_Master_Read(unsigned short a){

  I2C_Master_Wait();
  SSP1CON2bits.RCEN = 1;
  I2C_Master_Wait();
  Temp = SSP1BUF; //Read data from SSPBUF
  I2C_Master_Wait();
  SSP1CON2bits.ACKDT = (a)?0:1; //Acknowledge bit
  SSP1CON2bits.ACKEN = 1; //Acknowledge sequence
  return Temp;
}
// ****************** EEPROM READ CODE ****************** //

I2C_Master_Start(); //Start condition
// 7 bit EEPROM device address
I2C_Master_Write(0xA0 | ((0x00>>7) & 0x0E));
// Address to Read from
    I2C_Master_Write((unsigned char)0x00 & 0xFF);

I2C_Master_RepeatedStart(); //re Start condition
    // 7 bit EEPROM device address + Read
I2C_Master_Write(0xA1);
// READ ENTIRE 16 BYTE PAGE

for(int j = 0; j < 16; j++){
  // SAVE VALUE & SEND ACK FOR NEXT BYTE
  strData[j] = I2C_Master_Read(1);
}
SSP1CON2bits.ACKDT = 0; //Nack bit
SSP1CON2bits.ACKEN = 1; //Acknowledge sequence

I2C_Master_Stop(); // STOP
__delay_ms(5);

// ****************** EEPROM READ CODE ****************** //

I need your suggestion on selecting suitable serial EEPROM for my following requirements.

EmployeeID = 4 digits
Count = 7 digits
Total no of Employee = 9999
(so, 9999 records x 11 digits)

thanks,
pmk