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| Rev | Author | Line No. | Line |
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| 772 | - | 1 | /**************************************************************************** |
| 1437 | - | 2 | * Copyright (C) 2009-2012 by Claas Anders "CaScAdE" Rathje * |
| 772 | - | 3 | * admiralcascade@gmail.com * |
| 4 | * Project-URL: http://www.mylifesucks.de/oss/c-osd/ * |
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| 5 | * * |
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| 6 | * This program is free software; you can redistribute it and/or modify * |
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| 7 | * it under the terms of the GNU General Public License as published by * |
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| 8 | * the Free Software Foundation; either version 2 of the License. * |
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| 9 | * * |
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| 10 | * This program is distributed in the hope that it will be useful, * |
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| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
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| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
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| 13 | * GNU General Public License for more details. * |
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| 14 | * * |
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| 15 | * You should have received a copy of the GNU General Public License * |
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| 16 | * along with this program; if not, write to the * |
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| 17 | * Free Software Foundation, Inc., * |
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| 18 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * |
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| 19 | ****************************************************************************/ |
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| 20 | |||
| 800 | - | 21 | #include "main.h" |
| 772 | - | 22 | #include <avr/io.h> |
| 23 | #include <avr/interrupt.h> |
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| 24 | #include <util/delay.h> |
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| 25 | #include "usart0.h" |
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| 26 | |||
| 932 | - | 27 | #ifdef SERIALDEBUGDRAW |
| 28 | #define USART0ENABLE 1 |
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| 29 | #endif |
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| 30 | #ifdef ANTENNATRACKTEST |
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| 31 | #define USART0ENABLE 1 |
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| 32 | #endif |
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| 800 | - | 33 | |
| 34 | |||
| 932 | - | 35 | |
| 36 | #ifdef USART0ENABLE |
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| 37 | |||
| 38 | |||
| 772 | - | 39 | #if !(ALLCHARSDEBUG|(WRITECHARS != -1)) |
| 40 | |||
| 41 | |||
| 42 | /* ########################################################################## |
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| 43 | * USART0 stuff |
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| 44 | * ##########################################################################*/ |
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| 45 | |||
| 46 | /** |
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| 47 | * init usart1 |
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| 48 | */ |
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| 49 | void usart0_init() { |
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| 50 | UBRR0H = ((F_CPU / (16UL * baud)) - 1) >> 8; |
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| 51 | UBRR0L = (F_CPU / (16UL * baud)) - 1; |
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| 52 | |||
| 53 | // Enable receiver and transmitter; enable RX interrupt |
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| 54 | UCSR0B = (1 << RXEN0) | (1 << TXEN0) | (1 << RXCIE0); |
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| 55 | |||
| 56 | //asynchronous 8N1 |
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| 57 | UCSR0C = (1 << URSEL0) | (3 << UCSZ00); |
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| 932 | - | 58 | |
| 59 | |||
| 60 | DDRD |= (1 << DDD1); // set TXD pin as output |
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| 61 | PORTD &= ~(1 << PORTD1); // disable pullup on TXD pin |
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| 772 | - | 62 | } |
| 63 | |||
| 64 | |||
| 65 | /** |
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| 66 | * send a single <character> through usart1 |
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| 67 | */ |
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| 68 | void usart0_putc(unsigned char character) { |
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| 69 | // wait until UDR ready |
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| 70 | while (!(UCSR0A & (1 << UDRE0))); |
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| 71 | UDR0 = character; |
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| 72 | } |
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| 73 | |||
| 74 | /** |
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| 75 | * send a <string> throught usart0 |
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| 76 | */ |
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| 77 | void usart0_puts(char *s) { |
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| 78 | while (*s) { |
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| 79 | usart0_putc(*s); |
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| 80 | s++; |
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| 81 | } |
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| 82 | } |
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| 83 | |||
| 84 | /** |
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| 85 | * send a PGM<string> throught usart1 |
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| 86 | */ |
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| 87 | void usart0_puts_pgm(const char* string) { |
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| 88 | while (pgm_read_byte(string) != 0x00) |
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| 89 | usart0_putc(pgm_read_byte(string++)); |
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| 90 | } |
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| 91 | |||
| 92 | /** |
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| 93 | * transmit interrupt handler |
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| 94 | * unused |
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| 95 | */ |
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| 1772 | - | 96 | ISR(USART0_TXC_vect) { |
| 772 | - | 97 | } |
| 98 | |||
| 99 | /* |
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| 100 | * receive data through usart1 |
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| 101 | * portions taken and adapted from |
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| 102 | * http://svn.mikrokopter.de/mikrowebsvn/filedetails.php?repname=FlightCtrl&path=%2Fbranches%2FV0.72p+Code+Redesign+killagreg%2Fuart0.c |
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| 103 | */ |
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| 1772 | - | 104 | ISR(USART0_RXC_vect) { |
| 772 | - | 105 | uint8_t c; |
| 106 | // catch the received byte |
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| 800 | - | 107 | c = UDR0; |
| 108 | |||
| 772 | - | 109 | // echo |
| 800 | - | 110 | UDR0 = c; |
| 111 | } |
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| 772 | - | 112 | |
| 113 | |||
| 114 | |||
| 800 | - | 115 | #endif |
| 116 | |||
| 932 | - | 117 | #endif // USART0ENABLE |