hello sir, I did both TX and RX operation in UART0. and viewed the transmitted result in puTTy. But in CCS terminal i couldn't see..... And at the same time if i use any UART except UART0, i couldnt get the result.i dont know that where i did mistak

#include <stdint.h>
#include <stdbool.h>
#include <hw_memmap.h>
#include <gpio.h>
#include <sysctl.h>
#include <uart.h>
#include <interrupt.h>
#include <tm4c123gh6pm.h>
unsigned char a;
void dly(unsigned int ms)
{
ms=(SysCtlClockGet()/3.0)*ms/1000;
SysCtlDelay(ms);
}

void UARTIntHandler()
{
UARTIntClear(UART4_BASE,UART_INT_RX);
UARTCharPut(UART4_BASE,UARTCharGet(UART4_BASE));
}

int main(void)
{

SysCtlClockSet(SYSCTL_SYSDIV_5| SYSCTL_USE_PLL | SYSCTL_OSC_MAIN | SYSCTL_XTAL_16MHZ);

SysCtlPeripheralEnable(SYSCTL_PERIPH_UART4);
SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOC);

GPIOPinConfigure(0x00021001);
GPIOPinConfigure(0x00021401);
GPIOPinTypeUART(GPIO_PORTC_BASE, GPIO_PIN_4|GPIO_PIN_5);

UARTConfigSetExpClk(UART4_BASE, SysCtlClockGet(), 115200, (UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE | UART_CONFIG_PAR_NONE));
//UARTFIFOLevelSet(UART4_BASE,UART_FIFO_TX4_8,UART_FIFO_RX4_8);
UARTEnable(UART4_BASE);
UARTCharPut(UART4_BASE, 'E');
UARTCharPut(UART4_BASE, 'n');
UARTCharPut(UART4_BASE, 't');
UARTCharPut(UART4_BASE, 'e');
UARTCharPut(UART4_BASE, 'r');
UARTCharPut(UART4_BASE, ' ');
UARTCharPut(UART4_BASE, 'T');
UARTCharPut(UART4_BASE, 'e');
UARTCharPut(UART4_BASE, 'x');
UARTCharPut(UART4_BASE, 't');
UARTCharPut(UART4_BASE, ':');
UARTCharPut(UART4_BASE, ' ');

while (1)
{
//if(UARTCharsAvail(UART4_BASE)){a=UARTCharGet(UART4_BASE); UARTCharPut(UART4_BASE, a);}
}

}