osd-contiki/cpu/avr/dev/rs232_atmega128.h
barner 45cbcde797 - Fix/enhence support for RS232 interface on AVR (ATMega128):
* support for multiple ports: (extended interface with 'port' parameter)
 * new function: rs232_redirect_stdout that allows you to redirect stdout
   to a serial port
- In order to implement support for other MCUs, adopt a copy of
   rs232_atmega128.h
2006-12-22 17:00:45 +00:00

128 lines
5.6 KiB
C

/*
* Copyright (c) 2006, Technical University of Munich
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
* @(#)$$
*/
/**
* \file
* AVR specific definitions for the rs232 port.
*
* \author
* Simon Barner <barner@in.tum.de
*/
#ifndef __RS232_ATMEGA128__
#define __RS232_ATMEGA128__
/******************************************************************************/
/*** Includes */
/******************************************************************************/
#include <avr/io.h>
/******************************************************************************/
/*** RS232 ports */
/******************************************************************************/
#define RS232_PORT_0 0
#define RS232_PORT_1 1
/******************************************************************************/
/*** Baud rates */
/******************************************************************************/
#if MCU_MHZ == 16
/* Single speed operation (U2X = 0)*/
#define USART_BAUD_2400 416
#define USART_BAUD_4800 207
#define USART_BAUD_9600 103
#define USART_BAUD_14400 68
#define USART_BAUD_19200 51
#define USART_BAUD_28800 34
#define USART_BAUD_38400 25
#define USART_BAUD_57600 16
#define USART_BAUD_76800 12
#define USART_BAUD_115200 8
#define USART_BAUD_230400 3
#define USART_BAUD_250000 3
#define USART_BAUD_500000 1
#define USART_BAUD_1000000 0
#else
#error "Please define the baud rates for your CPU clock: ATmega128 handbook p. \
195-198 or set the rate in contiki-conf.h"
#endif
/******************************************************************************/
/*** Interrupt settings */
/******************************************************************************/
#define USART_INTERRUPT_RX_COMPLETE _BV (RXCIE)
#define USART_INTERRUPT_TX_COMPLETE _BV (TXCIE)
#define USART_INTERRUPT_DATA_REG_EMPTY _BV (UDRIE)
/******************************************************************************/
/*** Receiver / transmitter */
/******************************************************************************/
#define USART_RECEIVER_ENABLE _BV (RXEN)
#define USART_TRANSMITTER_ENABLE _BV (TXEN)
/******************************************************************************/
/*** Mode select */
/******************************************************************************/
#define USART_MODE_ASYNC 0x00
#define USART_MODE_SYNC _BV (UMSEL)
/******************************************************************************/
/*** Parity */
/******************************************************************************/
#define USART_PARITY_NONE 0x00
#define USART_PARITY_EVEN _BV (UPM1)
#define USART_PARITY_ODD _BV (UPM1) | _BV (UPM0)
/******************************************************************************/
/*** Stop bits */
/******************************************************************************/
#define USART_STOP_BITS_1 0x00
#define USART_STOP_BITS_2 _BV (USBS)
/******************************************************************************/
/*** Character size */
/******************************************************************************/
#define USART_DATA_BITS_5 0x00
#define USART_DATA_BITS_6 _BV (UCSZ0)
#define USART_DATA_BITS_7 _BV (UCSZ1)
#define USART_DATA_BITS_8 _BV (UCSZ1) | _BV (UCSZ0)
// #define USART_DATA_BITS_9 (needs also UCSZ2 bit in UCSRnB)
/******************************************************************************/
/*** Clock polarity */
/******************************************************************************/
#define USART_RISING_XCKN_EDGE 0x00
#define USART_FALLING_XCKN_EDGE _BV (UCPOL)
#endif /* #ifndef __RS232_ATMEGA128__ */