UART not working.

I am new to Renesas and infact this is my first time hands-on. I really liked the Peripheral pin code generator. But I need help with respect to UART. I tested in simulator it was not working in that and in actual hardware there is some random character being spitted out continously.

I tried to write a sample code to test UART but it was not working for me. Please let me resolve this problem.

Toolchain: GCC for Renesas 4.9.2.201801-GNURL78 (Latest)

IDE version : e2 studio 6.2.0

///CODE
static const uint8_t messageHelloWorld[13] = {“Hello World\r\n”};
uint8_t g_Uart0RxBuf; /* 1 byte RX Buffer */
MD_STATUS g_Uart0TxEnd; /* Signals end of Tx */
extern volatile uint16_t g_uart0_rx_count; /* uart0 receive data number */
extern volatile uint16_t g_uart0_rx_length; /* uart0 receive data length */

void init_uart()
{
int i = 0,flag=0;
for(i=0;i<10;i++)
{
g_Uart0TxEnd = R_UART0_Send(messageHelloWorld, 13);
while(g_Uart0TxEnd == 0);
}
P1 = 0xFF;

R_UART0_Receive(&g_Uart0RxBuf,1);

while (1U)
{
if( g_uart0_rx_count >= g_uart0_rx_length)
{
if(flag ==0)
flag=0xff;
else
flag = 00;
P1=flag;

/* Send the recieved char on console */
g_Uart0TxEnd = R_UART0_Send(&g_Uart0RxBuf, g_uart0_rx_length);
while(g_Uart0TxEnd == 0);        /* Wait for final transmit */
}
/* Initialize the RX Buffer for Next Reception */
R_UART0_Receive(&g_Uart0RxBuf,1);
}
}

/***********************************************************************************************************************
* Function Name: main
* Description  : This function implements main function.
* Arguments    : None
* Return Value : None
***********************************************************************************************************************/
void main(void)
{
R_MAIN_UserInit();
/* Start user code. Do not edit comment generated here */

//P1 = 0x10;
int i =1;
double j=0,x=0;
while (1U)
{
P1 = 0x00;
uart_fn();
}
/* End user code. Do not edit comment generated here */
}

/***********************************************************************************************************************
* Function Name: R_MAIN_UserInit
* Description  : This function adds user code before implementing main function.
* Arguments    : None
* Return Value : None
***********************************************************************************************************************/
void R_MAIN_UserInit(void)
{
/* Start user code. Do not edit comment generated here */
EI();
R_UART0_Start();
/* End user code. Do not edit comment generated here */
}

/* Start user code for adding. Do not edit comment generated here */
/* End user code. Do not edit comment generated here */