I²C Stop Bit Problem

Tool/software: Code Composer Studio

Hello all,

I worked with I2C before and the topic below was mine. 

I changed my CCS to  Version: 8.1.0.00011 and my i²c communication does not work anymore.

EALLOW;

    GpioCtrlRegs.GPBPUD.bit.GPIO32 = 0;    // Enable pull-up for GPIO32 (SDAA)
    GpioCtrlRegs.GPBPUD.bit.GPIO33 = 0;    // Enable pull-up for GPIO33 (SCLA)

    GpioCtrlRegs.GPBQSEL1.bit.GPIO32 = 3;  // Asynch input GPIO32 (SDAA)
    GpioCtrlRegs.GPBQSEL1.bit.GPIO33 = 3;  // Asynch input GPIO33 (SCLA)

    GpioCtrlRegs.GPBMUX1.bit.GPIO32 = 1;   // Configure GPIO32 for SDAA operation
    GpioCtrlRegs.GPBMUX1.bit.GPIO33 = 1;   // Configure GPIO33 for SCLA operation

    EDIS;

void I2CA_Init(void)
{
        I2caRegs.I2CMDR.all     = 0x0000;
       // Initialize I2C
       I2caRegs.I2CSAR = 0x0050;        // Slave address - EEPROM control code

       // I2CCLK = SYSCLK/(I2CPSC+1)

         I2caRegs.I2CPSC.all = 8;  //6     // Prescaler - need 7-12 Mhz on module clk


       I2caRegs.I2CCLKL = 10;           // NOTE: must be non zero
       I2caRegs.I2CCLKH = 5;            // NOTE: must be non zero
//     I2caRegs.I2CIER.all = 0x24;      // Enable SCD & ARDY interrupts

       I2caRegs.I2CMDR.all = 0x0020;    // Take I2C out of reset
                                        // Stop I2C when suspended

       I2caRegs.I2CFFTX.all = 0x6000;   // Enable FIFO mode and TXFIFO
       I2caRegs.I2CFFRX.all = 0x2040;   // Enable RXFIFO, clear RXFFINT,


   return;
}

Uint16 ReadEeprom(Uint16 e2promaddress)
{
    Uint16 addresslow;
    Uint16 addresshigh;

    I2caRegs.I2CMDR.bit.IRS = 1;                // reset I2C
    while (I2caRegs.I2CSTR.bit.BB == 1);        // busy loop
    I2caRegs.I2CSTR.bit.SCD = 1;                // Clear the SCD bit (stop condition bit)
    while(I2caRegs.I2CMDR.bit.STP == 1);        // stop bit loop

    addresshigh         = e2promaddress>>8;
    addresslow          = e2promaddress;

    I2caRegs.I2CSAR     = 0x0050;

    while (I2caRegs.I2CSTR.bit.BB == 1);
    I2caRegs.I2CMDR.all = 0x2620;               // start, no stop bit, master, tx, reset I2C
    I2caRegs.I2CCNT     = 0x0002;
    I2caRegs.I2CDXR     = addresshigh;
    I2caRegs.I2CDXR     = addresslow;

    while(!I2caRegs.I2CSTR.bit.ARDY);           // all ready?

    I2caRegs.I2CMDR.all = 0x2C20;               // start, stop bit when CNT =0, master, rx, reset I2C
    I2caRegs.I2CCNT     = 1;

    if(I2caRegs.I2CSTR.bit.NACK == 1)
    {
         I2caRegs.I2CSTR.all = I2C_CLR_NACK_BIT;    // 0x0002
    }
         I2caRegs.I2CMDR.bit.STP = 1;                    // stop bit when CNT=0

    while(!I2caRegs.I2CSTR.bit.SCD);                // stop bit detected?

    dataReadSample[e2promaddress] = I2caRegs.I2CDRR; // read data

    DELAY_US(100);

    return(dataReadSample[e2promaddress]);
}

void WriteEeprom(Uint16 e2promaddress, Uint16 data)
{
        Uint16 addresslow;
        Uint16 addresshigh;

        I2caRegs.I2CMDR.bit.IRS = 1;            // reset I2C

        addresshigh         = (e2promaddress>>8)&0x00FF;
        addresslow          = e2promaddress&0x00FF;
        I2caRegs.I2CSAR     = 0x0050;           // EEPROM control bits + address (A0-A2). for 24LC256, 0 1 0 1 0 A0 A1 A2

        while (I2caRegs.I2CSTR.bit.BB == 1);

        I2caRegs.I2CCNT     = 3 ;
        I2caRegs.I2CMDR.all = 0x6E20;               //start, stop, no rm, reset i2c
        I2caRegs.I2CDXR     = addresshigh;
        I2caRegs.I2CDXR     = addresslow;
      //I2caRegs.I2CDXR     = (data >> 8) & 0x00FF; // high byte data
        I2caRegs.I2CDXR     = data;                 // low byte data
        dataWriteSample[e2promaddress] = I2caRegs.I2CDXR;

        I2caRegs.I2CMDR.bit.STP = 1;                // stop bit when CNT=0

        while(!I2caRegs.I2CSTR.bit.SCD);            // stop bit detected?

        DELAY_US(5000);                             // 5ms = write cycle time of 24LC256 - based on datasheet 24LC256

    return;
}

When I try to read or write, I wait here.

         I2caRegs.I2CMDR.bit.STP = 1;                    // stop bit when CNT=0

    while(!I2caRegs.I2CSTR.bit.SCD);                // stop bit detected?

My hardware seems ok. When stop bit is detected, SCLA becomes 0V and SDAA stays as 3.3V on the oscilloscope. The codes worked before. What should the problem be?