MSP430F6779A: Unable to read all data from RX and the readTimeout of UART_read is not working.

Dear Experts,

I am testing UART on MSP430F6779A with board MSP-TS430PEU128.

My problem is on reading UART and cannot get all data from RX, here is the code how I to do that,

Void echoFxn(UArg arg0, UArg arg1)
{
    BYTE buffer[10];
    char input;
    int readSize = 1;

    UART_Handle uart;
    UART_Params uartParams;

    UART_Params_init(&uartParams);
    uartParams.readMode = UART_MODE_BLOCKING;
    uartParams.writeMode = UART_MODE_BLOCKING;
    uartParams.writeDataMode = UART_DATA_BINARY;
    uartParams.readDataMode = UART_DATA_BINARY;
    uartParams.readReturnMode = UART_RETURN_FULL;
    uartParams.readEcho = UART_ECHO_OFF;
    uartParams.readTimeout = 1;
    uartParams.baudRate = 115200;
    uart = UART_open(1, &uartParams); /* P3.4,5 = USCI_A1 TXD/RXD */

    if (uart == NULL) {
        System_abort("Error opening the UART");
    }

    while (1) {
        UART_read(uart, &input, readSize);  //read 1 at once
        System_printf("%c\n", input); System_flush();
    }
}

I am using accessport tool to send data "1234567890", after run, I only got "1" and "0" which those are first and last characters. No mater what baudrate I set, only those two can be received.

Where I did wrong?

I also tried another way to read RX data which is read a block:

Void echoFxn(UArg arg0, UArg arg1)
{
    BYTE buffer[10];
    char input;
    int readSize = 1;

    UART_Handle uart;
    UART_Params uartParams;

    UART_Params_init(&uartParams);
    uartParams.readMode = UART_MODE_BLOCKING;
    uartParams.writeMode = UART_MODE_BLOCKING;
    uartParams.writeDataMode = UART_DATA_BINARY;
    uartParams.readDataMode = UART_DATA_BINARY;
    uartParams.readReturnMode = UART_RETURN_FULL;
    uartParams.readEcho = UART_ECHO_OFF;
    uartParams.readTimeout = 1;
    uartParams.baudRate = 115200;
    uart = UART_open(1, &uartParams); //open PM_UCA1

    if (uart == NULL) {
        System_abort("Error opening the UART");
    }

    while (1) {
        UART_read(uart, &buffer, 10);  //read 10 at once
        System_printf("%s\n", (char *)buffer); System_flush();
    }
}

I use same tool to send data "1234567890" and got all data "1234567890" without missing. But here is the problem, if I just send data less than 10, then I'll never get returned from UART_read. Seems the readTimeout setting is not working, why is that happen?

Thanks in advanced.