#include <pic.h>

__CONFIG(0x3F32);

#define seg PORTD							// define 7 segment as PORTD 
	
unsigned char a;

void init(void)								// subroutine to initialize  			
{	
	SPBRG=0x0A;								// set baud rate as 115200 baud
	BRGH=1;	
	TXEN=1;
	CREN=1;
	SPEN=1;
	TRISD = 0b00000000;
	seg   = 0b00000000;			
}

void display(unsigned char c)				// subrountine to display the text on the screen	
{
	while (TXIF == 0);
	TXREG = c;	
}

unsigned char receive(void)					// subrountine to receive text from PC
{
	while (RCIF == 0);
	a = RCREG;
	return a;
}

void main(void)
{
	init();

	while(1)								// wait for 'ok' to be entered
	{
		a = receive();								
		if (a == 'o') 						
			{
				a = receive();
				if (a == 'k') break;
			}
	}


		display('C');						// change the text for different display
		display('y');
		display('t');
		display('r');
		display('o');
		display('n');
		display(0x0a);
		display(0x0d);
		display('P');
		display('r');
		display('e');
		display('s');
		display('s');
		display(0x20);
		display('a');
		display('n');
		display('y');
		display(0x20);
		display('n');
		display('u');
		display('m');		
		display('b');
		display('e');
		display('r');

		seg = 1;	

		while(1)							// wait for number and display it on 7 segment
		{
			a = receive(); 
			if (a=='1'||a=='2'||a=='3'||a=='4'||a=='5'||a=='6'||a=='7'||a=='8'||a=='9'||a=='0')
			{
				seg = a-0x30;
			}
		}


}