Tooltron

/********

 * This file is part of Tooltron.

 *

 * Tooltron is free software: you can redistribute it and/or modify

 * it under the terms of the Lesser GNU General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * Tooltron is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * Lesser GNU General Public License for more details.

 * You should have received a copy of the Lesser GNU General Public License

 * along with Tooltron.  If not, see <http://www.gnu.org/licenses/>.

 *

 * Copyright 2009 Kevin Woo <kwoo@2ndt.com>

 *

 ********/

/** 

 * @file rs485_poll.h

 * @brief Implements rs485 using the uart hardware module.

 *

 * See rs485_sw.c for more information

 *

 * @author Kevin Woo (kwoo)

 */

#ifndef _RS485_SW_H

#define _RS485_SW_H

#include <avr/io.h>

#include <avr/interrupt.h>

#include <stdint.h>

#define RS485_TX_OFF 0

#define RS485_TX_ON 1

/** @brief RX Pin for the RS485 */

#define RX                _BV(PORTD0)

/** @brief TX Pin for the RS485 */

#define TX                _BV(PORTD1)

/** @brief TX Enable Pin for the RS485 */

#define TX_EN        _BV(PORTD5)

void rs485_init(uint16_t baud);

int8_t rs485_get_byte(uint8_t *output_byte);

void rs485_send_byte(uint8_t data);

static void rs485_toggle_transmit(uint8_t state);

#endif