TMS320F280049C: Usage of SCI-A interrupt

Hello TI Community,

I'm new to interrupts and need some guidance. I've configured my system to receive characters via UART interrupt and send them back to the console via UART transmission. However, the system isn't receiving characters as expected. Below is the code for your review. Any help would be greatly appreciated. 

#include "F28x_Project.h"
#include "inc/hw_types.h"
#include "driverlib.h"
#include "device.h"
#include "IQmathLib.h"
#include "math.h"
#include "FullBridgeInv.h"
#include "dlog_4ch.h"
#include "F28004x_Gpio.h"
#include "asysctl.h "


void interrupt void uartRxISR();
void interrupt void uartTxISR();
void initSCIA();

// UART receive interrupt handler
interrupt void uartRxISR(void)
{
    // Read received data
    char receivedChar = SciaRegs.SCIRXBUF.all;
    
    // Echo received character back
    SciaRegs.SCITXBUF.all = receivedChar;
    
    // Clear interrupt flag
    SciaRegs.SCIFFRX.bit.RXFFINTCLR = 1;
    PieCtrlRegs.PIEACK.all |= PIEACK_GROUP9;
}

// UART transmit interrupt handler
interrupt void uartTxISR(void)
{
    // Clear interrupt flag
    SciaRegs.SCIFFTX.bit.TXFFINTCLR = 1;
    PieCtrlRegs.PIEACK.all |= PIEACK_GROUP9;
}

int main(void)
{
    // Initialize system
    InitSysCtrl();
    
    // Initialize GPIO for SCI
    InitSciaGpio();
    
    // Initialize PIE
    InitPieCtrl();
    IER = 0x0000;
    IFR = 0x0000;
    
    PieVectTable.SCIA_RX_INT = &uartRxISR;
    PieCtrlRegs.PIEIER9.bit.INTx1 = 1;
    EnableInterrupts();
    initSCIA(); 
    
    while(1)
    {
        // Main application loop
    }
}
void initSCIA(void)
{
    SciaRegs.SCIFFTX.all = 0xE040;
    SciaRegs.SCIFFRX.all = 0x2044;
    SciaRegs.SCIFFCT.all = 0x0;

    // Note: Clocks were turned on to the SCIA peripheral
    // in the InitSysCtrl() function
    //
    SciaRegs.SCICCR.all = 0x0007;           // 1 stop bit,  No loopback
                                            // No parity, 8 char bits,
                                            // async mode, idle-line protocol
    SciaRegs.SCICTL1.all = 0x0003;          // enable TX, RX, internal SCICLK,
                                            // Disable RX ERR, SLEEP, TXWAKE
    SciaRegs.SCICTL2.all = 0x0003;
    SciaRegs.SCICTL2.bit.TXINTENA = 1;
    SciaRegs.SCICTL2.bit.RXBKINTENA = 1;

    //
    // SCIA at 9600 baud
    // @LSPCLK = 25 MHz (100 MHz SYSCLK) HBAUD = 0x01  and LBAUD = 0x44.
    //
    SciaRegs.SCIHBAUD.all = 0x0001;
    SciaRegs.SCILBAUD.all = 0x0044;

    SciaRegs.SCICTL1.all = 0x0023;          // Relinquish SCI from Reset
}

Thank you!

Vishal Tyagi