LAUNCHXL-F28379D: SCI communication: Only able to read first few characters and not able to transmit

Tool/software:

Hi,

I am setting up the code with same parameters as the SCI example3 but with Hardware Abstraction Layer. I am using polling to read/send the data.

void sci_write(const uint16_t * const array, uint16_t length)
{
    int i=0;
    for(i = 0; i < length; i++)
    {
       while(!SciaRegs.SCICTL2.bit.TXRDY);
        SciaRegs.SCITXBUF.bit.TXDT = array[i];
    }
}

void sci_read(uint16_t * array, uint16_t length){
int i=0;
    for(i = 0; i < length; i++)
    {
        while(!SciaRegs.SCIRXST.bit.RXRDY);
        array[i] = SciaRegs.SCIRXBUF.bit.SAR;

    }
}

Here's the readout result shown in the terminal. I was able to get proper readout for the first few characters (Fig 1). Then the Baudrate register and SCICTL2 registers were forced to change (Fig 2)

Fig 1 Terminal Readout

Fig 2 Register automatically changed (left: before right: after)

(C2000 ware SCI example 3 worked perfectly, which means the hardware, baudrate, port etc were set properly)