CCS/msp430fr4133: MSP430fr4133 unable to read complete frame received on uart

There is a bug in your code. Which you have not shown.

/*char rx_data;
WDTCTL = WDTPW | WDTHOLD; // Stop watchdog timer

init_gpio();

init_clock();

init_uart();
{
rx_data = EUSCI_A_UART_receiveData(EUSCI_A0_BASE); // store the received data in a variable .The RXIFG flags automatically reset when RXBUF is read

}while(rx_data!=0x7e);


if(rx_data==0x7e) //this condition represents frame starts from here
{

rx_data = EUSCI_A_UART_receiveData(EUSCI_A0_BASE);
}*/
I am trying to read the next byte of the received frame