[技术问答] 24C02使用的疑问，关于读数据时显示最后一次写的值

Write_24LC64(0x00000000,'a');

        Temp = Read_24LC64(0x00000000);

        printf("%c\n",Temp);

        

        Write_24LC64(0x00000001,'b');

        Temp1 = Read_24LC64(0x00000001);

        printf("%c\n",Temp1);

这样读完输出的是a，b

Write_24LC64(0x00000000,'a');        

        Write_24LC64(0x00000001,'b');

        

        Temp = Read_24LC64(0x00000000);

        printf("%c\n",Temp);

        Temp1 = Read_24LC64(0x00000001);

        printf("%c\n",Temp1);

这样输出的是b,b

uint8_t Read_24LC64(uint32_t address)

{

        uint8_t TEMP;

  //Open I2C1 and set clock = 50Kbps

        SystemCoreClock = DrvSYS_GetHCLKFreq(); 

        DrvI2C_Open(I2C_PORT1, 50000);

        //send i2c start

    DrvI2C_Ctrl(I2C_PORT1, 1, 0, 1, 0);                 //set start

        while (I2C1->I2CON.SI == 0);                                //poll si flag

         

           //send writer command

        I2C1->I2CDAT = 0XA0;

    DrvI2C_Ctrl(I2C_PORT1, 0, 0, 1, 0);           //clr si

    while( I2C1->I2CON.SI == 0 );                           //poll si flag

        

        //send address high

    I2C1->I2CDAT = (address>>8)&0XFF;        

        DrvI2C_Ctrl(I2C_PORT1, 0, 0, 1, 1);    //clr si and set ack

        while( I2C1->I2CON.SI == 0 );                           //poll si flag

    

        //send address low

        I2C1->I2CDAT = address&0XFF;        

        DrvI2C_Ctrl(I2C_PORT1, 0, 0, 1, 0);    //clr si        and set ack

        while( I2C1->I2CON.SI == 0 );                           //poll si flag

        

        //send start flag

        DrvI2C_Ctrl(I2C_PORT1, 1, 0, 1, 0);    //clr si and send start        

        while( I2C1->I2CON.SI == 0 );                           //poll si flag

        

        //send read command

        I2C1->I2CDAT = 0XA1;

        DrvI2C_Ctrl(I2C_PORT1, 0, 0, 1, 1);    //clr si

    while( I2C1->I2CON.SI == 0 );                           //poll si flag



        //resive data

        I2C1->I2CDAT = 0XFF;

        DrvI2C_Ctrl(I2C_PORT1, 0, 0, 1, 0);    //clr si        

        while( I2C1->I2CON.SI == 0 );                           //poll si flag

        TEMP= I2C1->I2CDAT;

        //send i2c stop

         DrvI2C_Ctrl(I2C_PORT1, 0, 1, 1, 0);    //clr si and set stop

        while( I2C1->I2CON.STO);

        DrvI2C_Close(I2C_PORT1);



        return TEMP; 

}