/* 
 * File:   main.c
 * Author: 
 *
 * Created on 2014/07/05, 13:54
 */

#define _XTAL_FREQ 8000000

#pragma config FOSC	= INTOSCIO
#pragma config WDTE	= OFF
#pragma config PWRTE	= OFF
#pragma config CP	= OFF
#pragma config LVP	= OFF

#include	<stdio.h>
#include	<stdlib.h>
#include	<string.h>
#include	<GenericTypeDefs.h>

#include	<xc.h>
#include	<pic16f88.h>

struct SND_BUF
{
	UCHAR8	buf[10];
	UCHAR8	cnt;
	UCHAR8	pos;
};
struct SND_BUF	snd_buf;

void uartinit()
{
	memset(
			&snd_buf,
			0x00,
			sizeof(snd_buf));

#if 0
	// 9600bps = 8000000 / (16 * (51 + 1))
	BRGH	= 1;
	SPBRG	= 51;
#else
	// 600bps = 8000000 / (64 * (207 + 1))
	BRGH	= 0;
	SPBRG	= 207;
#endif
	SYNC	= 0;

	CREN	= 1;
	RCIF	= 0;
	RCIE	= 1;
	RX9		= 0;

	TXEN	= 1;
	TXIF	= 0;
	TXIE	= 0;
	TX9		= 0;

	SPEN	= 1;
	//RCIE	= 1;
	//TXIE	= 0;
	//RCREG	= RCREG;
	TRISB2	= 1;
	TRISB5	= 0;

}

void snd_test(void)
{
	snd_buf.buf[0]	= 0x01;
	snd_buf.buf[1]	= 0x02;
	snd_buf.buf[2]	= 0x03;
	snd_buf.buf[3]	= 0x04;
	snd_buf.buf[4]	= 0x05;
	snd_buf.buf[5]	= 0x06;
	snd_buf.buf[6]	= 0x07;
	snd_buf.buf[7]	= 0x08;
	snd_buf.buf[8]	= 0x09;
	snd_buf.buf[9]	= 0x0a;
	snd_buf.pos		= 0;
	snd_buf.cnt		= 10;
	TXIE			= 1;
}

void snd()
{
	TXIF = 0;
	if(snd_buf.pos < snd_buf.cnt)
	{
		TXREG = snd_buf.buf[snd_buf.pos];
		++snd_buf.pos;
	}
	else
	{
		TXIE = 0;
		memset(
				&snd_buf,
				0x00,
				sizeof(snd_buf));
	}
}

void interrupt int_all(void)
{
	di();
	if(RCIF)
	{
		RCIF = 0;
		UCHAR8 c = RCREG;
		PORTB = c;
		if(!snd_buf.cnt)
		{
			snd_test();
		}
	}
	if(TXIF)
	{
		snd();
	}
	ei();
}

int main(int argc, char** argv)
{
	di();
	OSCCON	= 0x70;
	TRISA	= 0x00;
	TRISB	= 0x00;
	uartinit();
	GIE     = 1;
	PEIE	= 1;
	ei();
	while(1)
	{
	}
	return (EXIT_SUCCESS);
}