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rs232_atmega644.h
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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_ATMEGA644__
43 #define __RS232_ATMEGA644__
44 /******************************************************************************/
45 /*** Includes */
46 /******************************************************************************/
47 #include <avr/io.h>
48 
49 /******************************************************************************/
50 /*** RS232 ports */
51 /******************************************************************************/
52 #define RS232_PORT_0 0
53 
54 /******************************************************************************/
55 /*** Baud rates */
56 /******************************************************************************/
57 #if F_CPU == 16000000
58 /* Single speed operation (U2X = 0)*/
59 #define USART_BAUD_2400 416
60 #define USART_BAUD_4800 207
61 #define USART_BAUD_9600 103
62 #define USART_BAUD_14400 68
63 #define USART_BAUD_19200 51
64 #define USART_BAUD_28800 34
65 #define USART_BAUD_38400 25
66 #define USART_BAUD_57600 16
67 #define USART_BAUD_76800 12
68 #define USART_BAUD_115200 8
69 #define USART_BAUD_230400 3
70 #define USART_BAUD_250000 3
71 #define USART_BAUD_500000 1
72 #define USART_BAUD_1000000 0
73 #elif F_CPU == 8000000
74 /* Single speed operation (U2X = 0)*/
75 #define USART_BAUD_2400 207
76 #define USART_BAUD_4800 103
77 #define USART_BAUD_9600 51
78 #define USART_BAUD_14400 34
79 #define USART_BAUD_19200 25
80 #define USART_BAUD_28800 16
81 #define USART_BAUD_38400 12
82 #define USART_BAUD_57600 8
83 #define USART_BAUD_76800 6
84 #define USART_BAUD_115200 3
85 #define USART_BAUD_230400 1
86 #define USART_BAUD_250000 1
87 #define USART_BAUD_500000 0
88 #else
89 #error "Please define the baud rates for your CPU clock: ATmega644 handbook p. \
90 187-190 or set the rate in contiki-conf.h"
91 #endif
92 
93 
94 /******************************************************************************/
95 /*** Interrupt settings */
96 /******************************************************************************/
97 #define USART_INTERRUPT_RX_COMPLETE _BV (RXCIE0)
98 #define USART_INTERRUPT_TX_COMPLETE _BV (TXCIE0)
99 #define USART_INTERRUPT_DATA_REG_EMPTY _BV (UDRIE0)
100 
101 /******************************************************************************/
102 /*** Receiver / transmitter */
103 /******************************************************************************/
104 #define USART_RECEIVER_ENABLE _BV (RXEN0)
105 #define USART_TRANSMITTER_ENABLE _BV (TXEN0)
106 
107 /******************************************************************************/
108 /*** Mode select */
109 /******************************************************************************/
110 #define USART_MODE_ASYNC 0x00
111 #define USART_MODE_SYNC _BV (UMSEL00)
112 
113 /******************************************************************************/
114 /*** Parity */
115 /******************************************************************************/
116 #define USART_PARITY_NONE 0x00
117 #define USART_PARITY_EVEN _BV (UPM01)
118 #define USART_PARITY_ODD _BV (UPM01) | _BV (UPM00)
119 
120 /******************************************************************************/
121 /*** Stop bits */
122 /******************************************************************************/
123 #define USART_STOP_BITS_1 0x00
124 #define USART_STOP_BITS_2 _BV (USBS)
125 
126 /******************************************************************************/
127 /*** Character size */
128 /******************************************************************************/
129 #define USART_DATA_BITS_5 0x00
130 #define USART_DATA_BITS_6 _BV (UCSZ00)
131 #define USART_DATA_BITS_7 _BV (UCSZ01)
132 #define USART_DATA_BITS_8 _BV (UCSZ01) | _BV (UCSZ00)
133 // #define USART_DATA_BITS_9 (needs also UCSZ2 bit in UCSRnB)
134 
135 /******************************************************************************/
136 /*** Clock polarity */
137 /******************************************************************************/
138 #define USART_RISING_XCKN_EDGE 0x00
139 #define USART_FALLING_XCKN_EDGE _BV (UCPOL0)
140 
141 #endif /* #ifndef __RS232_ATMEGA644__ */
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