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comparison 1wire-config.h @ 1:be930b34fcd3

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Make it compile, no testing yet.
author Daniel O'Connor <darius@dons.net.au>
date Mon, 26 Jan 2015 23:04:09 +1030
parents 93d4ddff7dd0
children
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0:93d4ddff7dd0 1:be930b34fcd3
1 /* 1 /*
2 * 1 wire header 2 * Example configuration header for 1-wire bus code.
3 * 3 *
4 * This is the user servicable stuff - how to do delays and how to 4 * This is the user servicable stuff - how to do delays and how to
5 * frob the IO pins. 5 * frob the IO pins.
6 * 6 *
7 * Copyright (c) 2004-2009 7 * Copyright (c) 2009
8 * Daniel O'Connor <darius@dons.net.au>. All rights reserved. 8 * Daniel O'Connor <darius@dons.net.au>. All rights reserved.
9 * 9 *
10 * Redistribution and use in source and binary forms, with or without 10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions 11 * modification, are permitted provided that the following conditions
12 * are met: 12 * are met:
29 * SUCH DAMAGE. 29 * SUCH DAMAGE.
30 */ 30 */
31 31
32 /* 32 /*
33 * Alter these for your configuration 33 * Alter these for your configuration
34 *
35 * The configuration described here has the 1-wire read on D3,
36 * a pulldown transistor on D4 and VPP controlled by D5.
34 */ 37 */
35 38
36 #define OWBUSINIT() 39 #include <avr/io.h>
40 #include <avr/pgmspace.h>
41 #include <util/delay.h>
42 #include "cons.h"
37 43
38 /* Set the IO to input */ 44 /* Initialise the DDR pins if necessary */
45 #define OWBUSINIT() do { \
46 DDRD |= _BV(4); \
47 DDRD &= ~_BV(3); \
48 } while (0)
49
50 /* Set the port up to allow reading from the 1 wire bus */
39 #define OWSETREAD() \ 51 #define OWSETREAD() \
40 do { \ 52 do { \
41 __asm__ volatile ("" ::: "memory"); \
42 DDRB &= ~_BV(0); \
43 PORTB &= ~_BV(0); \
44 __asm__ volatile ("" ::: "memory"); \
45 } while (0) 53 } while (0)
46 54
55
47 /* Read the 1-wire bus, non-inverting logic */ 56 /* Read the 1-wire bus, non-inverting logic */
48 #define OWREADBUS() (PINB & _BV(0) ? 1 : 0) 57 #define OWREADBUS() (PIND & _BV(3) ? 1 : 0)
49 58
50 /* Set the 1-wire bus to 0 59 /* Set the 1-wire bus to 0
51 * Drive output low 60 * Turns a transistor on to pull it low
52 */ 61 */
53 #define OWSETBUSLOW() \ 62 #define OWSETBUSLOW() PORTD |= _BV(4)
54 do { \
55 __asm__ volatile ("" ::: "memory"); \
56 DDRB |= _BV(0); \
57 PORTB &= ~_BV(0); \
58 __asm__ volatile ("" ::: "memory"); \
59 } while (0)
60 63
61 /* Set the 1-wire bus to 1 64 /* Set the 1-wire bus to 1
62 * Allow to float, use pullup 65 * Turn the transistor off to let the pullup do its job
63 */ 66 */
64 #define OWSETBUSHIGH() \ 67 #define OWSETBUSHIGH() PORTD &= ~_BV(4)
65 do { \ 68
66 __asm__ volatile ("" ::: "memory"); \ 69 /* Turn Vpp on (ie put +12V on the bus
67 DDRB &= ~_BV(0); \ 70 * This is optional, if it is undefined OWProgROM always fails */
68 __asm__ volatile ("" ::: "memory"); \ 71 #define OWSETVPPON() PORTD |= _BV(5)
69 } while (0) 72 #define OWSETVPPOFF() PORTD &= ~_BV(5)
70 73
71 /* _delay_us can only do a delay of 768/clock_freq */ 74 /* _delay_us can only do a delay of 768/clock_freq */
72 #if F_CPU > 16000000 75 #if F_CPU > 16000000
73 #error F_CPU > 16MHz, delays need adjusting 76 #error F_CPU > 16MHz, delays need adjusting
74 #endif 77 #endif
82 #define OWDELAY_G /* 0 usec */ 85 #define OWDELAY_G /* 0 usec */
83 #define OWDELAY_H do { _delay_us(48); _delay_us(48); _delay_us(48); \ 86 #define OWDELAY_H do { _delay_us(48); _delay_us(48); _delay_us(48); \
84 _delay_us(48); _delay_us(48); _delay_us(48); _delay_us(48); \ 87 _delay_us(48); _delay_us(48); _delay_us(48); _delay_us(48); \
85 _delay_us(48);_delay_us(48); _delay_us(48); } while (0) /* 480 usec */ 88 _delay_us(48);_delay_us(48); _delay_us(48); } while (0) /* 480 usec */
86 #define OWDELAY_I do { _delay_us(48); _delay_us(22); } while (0) /* 70 usec */ 89 #define OWDELAY_I do { _delay_us(48); _delay_us(22); } while (0) /* 70 usec */
90 #define OWDELAY_J do { _delay_us(41); _delay_us(41); _delay_us(41); \
91 _delay_us(41); _delay_us(41); _delay_us(41); _delay_us(41); \
92 _delay_us(41);_delay_us(41); _delay_us(41); } while (0) /* 410 usec */
87 93
88 #ifdef OW_DEBUG 94 #ifdef OW_DEBUG
89 #define OWPUTS(x) puts_P(x) 95 #define OWPUTS(x) puts_P(x)
90 #define OWPUTSP(x) puts_P(x) 96 #define OWPUTSP(x) puts_P(x)
91 #define OWPRINTFP(fmt, ...) printf_P(fmt, ## __VA_ARGS__) 97 #define OWPRINTFP(fmt, ...) printf_P(fmt, ## __VA_ARGS__)
92 #else 98 #else
93 #define OWPUTS(x) 99 #define OWPUTS(x)
94 #define OWPUTSP(x) 100 #define OWPUTSP(x)
95 #define OWPRINTFP(fmt, ...) 101 #define OWPRINTFP(fmt, ...)
96 #endif 102 #endif
97