#include

unsigned char UARTRead(void);

void UARTInit(void);

void UARTWrite(unsigned char);

sbit LED_RED=P1^0;

sbit LED_GREEN=P1^1;

void main (void)

{

unsigned char ch ='*' ;

long l;

UARTInit();

LED_RED=0;

LED_GREEN=0;

while(1)

{

ch=UARTRead();

if(ch == 'Y'|| ch=='y')

{

for(l=0;l

unsigned char UARTRead(void)

{

unsigned char ret_val = '*';

if(RI == 1)

{

ret_val =1;

ret_val = SBUF; //read serial data

RI = 0; //reset interrupt. Vital!

}

return ret_val;

}

void UARTWrite(unsigned char ret_val)

{

if(TI == 1)

{

TI = 0;

SBUF = ret_val; //writes data to serial buffer

ret_val= 1;

TI =1;

}

}

Then double click on virtual terminal and select baud rate as given below

Press Play button and see simulation

Press Y or N to see LEDs will blink and G or R will come up on screen