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rs232_atmega32.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  * Daniel Willmann <daniel@totalueberwachung.de>
41  */
42 
43 #ifndef __RS232_ATMEGA32__
44 #define __RS232_ATMEGA32__
45 /******************************************************************************/
46 /*** Includes */
47 /******************************************************************************/
48 #include <avr/io.h>
49 
50 /******************************************************************************/
51 /*** RS232 ports */
52 /******************************************************************************/
53 #define RS232_PORT_0 0
54 
55 /******************************************************************************/
56 /*** Baud rates */
57 /******************************************************************************/
58 #if F_CPU == 16000000
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 F_CPU == 8000000
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: ATmega32 handbook p. \
91 163-166 or set the rate in contiki-conf.h"
92 #endif
93 
94 
95 /******************************************************************************/
96 /*** Interrupt settings */
97 /******************************************************************************/
98 #define USART_INTERRUPT_RX_COMPLETE _BV (RXCIE)
99 #define USART_INTERRUPT_TX_COMPLETE _BV (TXCIE)
100 #define USART_INTERRUPT_DATA_REG_EMPTY _BV (UDRIE)
101 
102 /******************************************************************************/
103 /*** Receiver / transmitter */
104 /******************************************************************************/
105 #define USART_RECEIVER_ENABLE _BV (RXEN)
106 #define USART_TRANSMITTER_ENABLE _BV (TXEN)
107 
108 /******************************************************************************/
109 /*** Register select */
110 /******************************************************************************/
111 #define USART_UCSRC_SEL _BV (URSEL)
112 
113 /******************************************************************************/
114 /*** Mode select */
115 /******************************************************************************/
116 #define USART_MODE_ASYNC 0x00
117 #define USART_MODE_SYNC _BV (UMSEL)
118 
119 /******************************************************************************/
120 /*** Parity */
121 /******************************************************************************/
122 #define USART_PARITY_NONE 0x00
123 #define USART_PARITY_EVEN _BV (UPM1)
124 #define USART_PARITY_ODD _BV (UPM1) | _BV (UPM0)
125 
126 /******************************************************************************/
127 /*** Stop bits */
128 /******************************************************************************/
129 #define USART_STOP_BITS_1 0x00
130 #define USART_STOP_BITS_2 _BV (USBS)
131 
132 /******************************************************************************/
133 /*** Character size */
134 /******************************************************************************/
135 #define USART_DATA_BITS_5 0x00
136 #define USART_DATA_BITS_6 _BV (UCSZ0)
137 #define USART_DATA_BITS_7 _BV (UCSZ1)
138 #define USART_DATA_BITS_8 _BV (UCSZ1) | _BV (UCSZ0)
139 // #define USART_DATA_BITS_9 (needs also UCSZ2 bit in UCSRnB)
140 
141 /******************************************************************************/
142 /*** Clock polarity */
143 /******************************************************************************/
144 #define USART_RISING_XCKN_EDGE 0x00
145 #define USART_FALLING_XCKN_EDGE _BV (UCPOL)
146 
147 #endif /* #ifndef __RS232_ATMEGA32__ */
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