Subversion Repositories Projects

Rev

Rev 800 | Rev 932 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
772 - 1
/****************************************************************************
902 - 2
 *   Copyright (C) 2009-2011 by Claas Anders "CaScAdE" Rathje               *
772 - 3
 *   admiralcascade@gmail.com                                               *
4
 *   Project-URL: http://www.mylifesucks.de/oss/c-osd/                      *
5
 *                                                                          *
6
 *   This program is free software; you can redistribute it and/or modify   *
7
 *   it under the terms of the GNU General Public License as published by   *
8
 *   the Free Software Foundation; either version 2 of the License.         *
9
 *                                                                          *
10
 *   This program is distributed in the hope that it will be useful,        *
11
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of         *
12
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          *
13
 *   GNU General Public License for more details.                           *
14
 *                                                                          *
15
 *   You should have received a copy of the GNU General Public License      *
16
 *   along with this program; if not, write to the                          *
17
 *   Free Software Foundation, Inc.,                                        *
18
 *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.              *
19
 ****************************************************************************/
20
 
800 - 21
#include "main.h"
772 - 22
#include <avr/io.h>
23
#include <avr/interrupt.h>
24
#include <util/delay.h>
25
#include "usart0.h"
26
 
800 - 27
#ifdef ANTENNATRACKTEST 
28
 
29
 
772 - 30
#if !(ALLCHARSDEBUG|(WRITECHARS != -1))
31
 
32
 
33
/* ##########################################################################
34
 * USART0 stuff
35
 * ##########################################################################*/
36
 
37
/**
38
 * init usart1
39
 */
40
void usart0_init() {
41
    UBRR0H = ((F_CPU / (16UL * baud)) - 1) >> 8;
42
    UBRR0L = (F_CPU / (16UL * baud)) - 1;
43
 
44
    // Enable receiver and transmitter; enable RX interrupt
45
    UCSR0B = (1 << RXEN0) | (1 << TXEN0) | (1 << RXCIE0);
46
 
47
    //asynchronous 8N1
48
    UCSR0C = (1 << URSEL0) | (3 << UCSZ00);
49
}
50
 
51
 
52
/**
53
 * send a single <character> through usart1
54
 */
55
void usart0_putc(unsigned char character) {
56
    // wait until UDR ready
57
    while (!(UCSR0A & (1 << UDRE0)));
58
    UDR0 = character;
59
}
60
 
61
/**
62
 * send a <string> throught usart0
63
 */
64
void usart0_puts(char *s) {
65
    while (*s) {
66
        usart0_putc(*s);
67
        s++;
68
    }
69
}
70
 
71
/**
72
 * send a PGM<string> throught usart1
73
 */
74
void usart0_puts_pgm(const char* string) {
75
    while (pgm_read_byte(string) != 0x00)
76
        usart0_putc(pgm_read_byte(string++));
77
}
78
 
79
/**
80
 * transmit interrupt handler
81
 * unused
82
 */
83
ISR(SIG_USART0_DATA) {
84
}
85
 
86
/*
87
 * receive data through usart1
88
 * portions taken and adapted from
89
 * http://svn.mikrokopter.de/mikrowebsvn/filedetails.php?repname=FlightCtrl&path=%2Fbranches%2FV0.72p+Code+Redesign+killagreg%2Fuart0.c
90
 */
91
ISR(SIG_USART0_RECV) {
92
    uint8_t c;
93
    // catch the received byte
800 - 94
    c = UDR0;
95
 
772 - 96
        // echo 
800 - 97
        UDR0 = c;
98
}
772 - 99
 
100
 
101
 
800 - 102
#endif
103
 
772 - 104
#endif // ANTENNATRACKTEST