cpu/avr/dev/rs232_atmega1281.h

   1 /*
   2  * Copyright (c) 2006, Technical University of Munich
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the Institute nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * This file is part of the Contiki operating system.
  30  *
  31  * @(#)$$
  32  */
  33
  34 /**
  35  * \file
  36  *         AVR specific definitions for the rs232 port.
  37  *
  38  * \author
  39  *         Simon Barner <barner@in.tum.de
  40  */
  41
  42 #ifndef __RS232_ATMEGA1281__
  43 #define __RS232_ATMEGA1281__
  44 /******************************************************************************/
  45 /***   Includes                                                               */
  46 /******************************************************************************/
  47 #include <avr/io.h>
  48
  49 /******************************************************************************/
  50 /***   RS232 ports                                                            */
  51 /******************************************************************************/
  52 #define RS232_PORT_0 0
  53 #define RS232_PORT_1 1
  54
  55 /******************************************************************************/
  56 /***   Baud rates                                                             */
  57 /******************************************************************************/
  58 #if MCU_MHZ == 16
  59 /* Single speed operation (U2X = 0)*/
  60 #define USART_BAUD_2400 416
  61 #define USART_BAUD_4800 207
  62 #define USART_BAUD_9600 103
  63 #define USART_BAUD_14400 68
  64 #define USART_BAUD_19200 51
  65 #define USART_BAUD_28800 34
  66 #define USART_BAUD_38400 25
  67 #define USART_BAUD_57600 16
  68 #define USART_BAUD_76800 12
  69 #define USART_BAUD_115200 8
  70 #define USART_BAUD_230400 3
  71 #define USART_BAUD_250000 3
  72 #define USART_BAUD_500000 1
  73 #define USART_BAUD_1000000 0
  74 #elif MCU_MHZ == 8
  75 /* Single speed operation (U2X = 0)*/
  76 #define USART_BAUD_2400 207
  77 #define USART_BAUD_4800 103
  78 #define USART_BAUD_9600 51
  79 #define USART_BAUD_14400 34
  80 #define USART_BAUD_19200 25
  81 #define USART_BAUD_28800 16
  82 #define USART_BAUD_38400 12
  83 #define USART_BAUD_57600 8
  84 #define USART_BAUD_76800 6
  85 #define USART_BAUD_115200 3
  86 #define USART_BAUD_230400 1
  87 #define USART_BAUD_250000 1
  88 #define USART_BAUD_500000 0
  89 #else
  90 #error "Please define the baud rates for your CPU clock: ATmega128 handbook p. \
  91 195-198 or set the rate in contiki-conf.h"
  92 #endif
  93
  94
  95 /******************************************************************************/
  96 /***   Interrupt settings                                                     */
  97 /******************************************************************************/
  98 #define USART_INTERRUPT_RX_COMPLETE _BV (RXCIE0)
  99 #define USART_INTERRUPT_TX_COMPLETE _BV (TXCIE0)
 100 #define USART_INTERRUPT_DATA_REG_EMPTY _BV (UDRIE0)
 101
 102 /******************************************************************************/
 103 /***   Receiver / transmitter                                                 */
 104 /******************************************************************************/
 105 #define USART_RECEIVER_ENABLE _BV (RXEN0)
 106 #define USART_TRANSMITTER_ENABLE _BV (TXEN0)
 107
 108 /******************************************************************************/
 109 /***   Mode select                                                            */
 110 /******************************************************************************/
 111 #define USART_MODE_ASYNC 0x00
 112 #define USART_MODE_SYNC _BV (UMSEL00)
 113
 114 /******************************************************************************/
 115 /***   Parity                                                                 */
 116 /******************************************************************************/
 117 #define USART_PARITY_NONE 0x00
 118 #define USART_PARITY_EVEN _BV (UPM01)
 119 #define USART_PARITY_ODD  _BV (UPM01) | _BV (UPM00)
 120
 121 /******************************************************************************/
 122 /***   Stop bits                                                              */
 123 /******************************************************************************/
 124 #define USART_STOP_BITS_1 0x00
 125 #define USART_STOP_BITS_2 _BV (USBS)
 126
 127 /******************************************************************************/
 128 /***   Character size                                                         */
 129 /******************************************************************************/
 130 #define USART_DATA_BITS_5 0x00
 131 #define USART_DATA_BITS_6 _BV (UCSZ00)
 132 #define USART_DATA_BITS_7 _BV (UCSZ01)
 133 #define USART_DATA_BITS_8 _BV (UCSZ01) | _BV (UCSZ00)
 134 // #define USART_DATA_BITS_9 (needs also UCSZ2 bit in UCSRnB)
 135
 136 /******************************************************************************/
 137 /***   Clock polarity                                                         */
 138 /******************************************************************************/
 139 #define USART_RISING_XCKN_EDGE 0x00
 140 #define USART_FALLING_XCKN_EDGE _BV (UCPOL0)
 141
 142 #endif /* #ifndef __RS232_ATMEGA1281__ */