#include <p18cxxx.h>
#include <usart.h>
#include <timers.h>
#include <pwm.h>

#pragma config LVP=OFF
#pragma config WDT=OFF

int r;

void rx_handler (void);

void main()
{
	TRISB = 0;
	PORTB = 0;	
	
	// check 65
	OpenUSART (USART_TX_INT_OFF & USART_RX_INT_ON & USART_ASYNCH_MODE & USART_EIGHT_BIT & USART_CONT_RX & USART_BRGH_LOW, 65);
	RCONbits.IPEN = 1;
	IPR1bits.RCIP = 1;
	INTCONbits.GIEH = 1;

	OpenTimer2(TIMER_INT_OFF & T2_PS_1_16);
	
	// 4.8khz duty cycle with 1/16 prescaler and 10mHz clock
	OpenPWM1(0x1f);
	OpenPWM2(0x1f);
	
	SetDCPWM1(0);
	SetDCPWM2(0);

	PORTBbits.RB7 = 1;
	PORTBbits.RB6 = 0;
	PORTBbits.RB5 = 1;
	PORTBbits.RB4 = 0;
	
	while(1)
	{

		while(BusyUSART());
		SetDCPWM1(r);

	}
}

#pragma code rx_interrupt = 0x8
void rx_int (void)
{
  _asm goto rx_handler _endasm
}
#pragma code

#pragma interrupt rx_handler
void rx_handler (void)
{
	r = getcUSART();
	PIR1bits.RCIF = 0;
}