//I2C function//

uint8_t ucRxdata[2] = { };
    UCB1I2CSA = ucSlaveAddress;               // set Slave Address as 0x55
    UCB1CTL1 &= ~UCSWRST;

    UCB1CTL1 |= UCTR | UCTXSTT;             // I2C tx, start condition

    for (g_uloopcount = 0; g_uloopcount < LOOP_COUNT; g_uloopcount++)
    {
        if (((UCB1CTL1 & UCTXSTT) == 0) && (UCB1IFG & UCTXIFG))
       // if ((UCB1IFG & UCTXIFG))
        {
            break;
        }
    }
    if (g_uloopcount == LOOP_COUNT)
    {
        /* Stop the I2C transmission */
        UCB1CTL1 |= UCTXSTP;
        //send previous value
        return prev_value;
    }
    /* Check for NACK/ACK - after start+address byte */
    if (UCB1IFG & UCNACKIFG)
    {
        /* Stop the I2C transmission */
        UCB1CTL1 |= UCTXSTP;

        /* Clear the interrupt flag */
        UCB1IFG &= ~UCNACKIFG;

        //should reset MSP if Battery Percentage I2C is called first time and encounters I2C error
        if(one_time_flag == false)
        {
            one_time_flag = true;
            return BatteryFuelGuageI2CMasterReceive(ucSlaveAddress, ucCmd, ucDataLength, prev_value);
        }
        else
        {
            //send previous value
            return prev_value;
        }
    }
    UCB1TXBUF = ucCmd;
    // wait until cmd got sent
    for (g_uloopcount = 0; g_uloopcount < LOOP_COUNT; g_uloopcount++)
    {
        if (UCB1IFG & UCTXIFG)
        {
            break;
        }
    }
    if (g_uloopcount == LOOP_COUNT)
    {
        /* Stop the I2C transmission */
        UCB1CTL1 |= UCTXSTP;
        //send previous value
        return prev_value;
    }
    UCB1CTL1 &= ~UCTR;
    UCB1CTL1 |= UCTXSTT;
    //wait till the start condition is cleared
    for (g_uloopcount = 0; g_uloopcount < LOOP_COUNT; g_uloopcount++)
    {
        if ((UCB1CTL1 & UCTXSTT) == 0)
        {
            break;
        }
    }
    if (g_uloopcount == LOOP_COUNT)
    {
        /* Stop the I2C transmission */
        UCB1CTL1 |= UCTXSTP;
        //send previous value
        return prev_value;
    }

    /* Check for ACK */
    if (UCB1IFG & UCNACKIFG)
    {
        /* Stop the I2C transmission */
        UCB1CTL1 |= UCTXSTP;

        /* Clear the interrupt flag */
        UCB1IFG &= ~UCNACKIFG;
        //should reset MSP if Battery Percentage I2C is called first time and encounters I2C error
        if (one_time_flag == false)
        {
            one_time_flag = true;
            return BatteryFuelGuageI2CMasterReceive(ucSlaveAddress, ucCmd, ucDataLength, prev_value);
        }
        else
        {
            //send previous value
            return prev_value;
        }
    }

    unsigned int uiCounter = 0;
    unsigned int uiRxCounter = 2;
    while (uiRxCounter > 0)
    {
        for (g_uloopcount = 0; g_uloopcount < LOOP_COUNT; g_uloopcount++)
        {
            if (UCB1IFG & UCRXIFG)
            {
                break;
            }
        }
        if (g_uloopcount == LOOP_COUNT)
        {
            /* Stop the I2C transmission */
            UCB1CTL1 |= UCTXSTP;
            //send previous value
            return prev_value;
        }

        /* Check for ACK */
        if (UCB1IFG & UCNACKIFG)
        {
            /* Stop the I2C transmission */
            UCB1CTL1 |= UCTXSTP;

            /* Clear the interrupt flag */
            UCB1IFG &= ~UCNACKIFG;

            if (one_time_flag == false)
            {
                one_time_flag = true;
                return BatteryFuelGuageI2CMasterReceive(ucSlaveAddress, ucCmd, ucDataLength, prev_value);
            }
            else
            {
                //send previous value
                return prev_value;
            }

        }
        ucRxdata[uiCounter] = UCB1RXBUF; // Receive data from fuel gauge
        if (uiCounter == 0)
        {
            //Send stop condition.
            UCB1CTL1 |= UCTXSTP;
        }
        uiCounter++;
        uiRxCounter--;
    }

    UCB1IFG &= ~UCRXIFG;
    /* Clear USCI_B1 TX int flag */
    UCB1IFG &= ~UCTXIFG;

    g_uBatteryInfo = (uint16_t) ucRxdata[0] << 8 | ucRxdata[1]; //Transmit received data byte by byte

    return g_uBatteryInfo;