annotate 1wire.c @ 68:cc998b0b2bae

Handle missing modules in OWGetTemp.
author Daniel O'Connor <darius@dons.net.au>
date Sun, 14 Apr 2013 16:07:29 +0930
parents 969bb070b181
children
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1 /*
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2 * Various 1 wire routines
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3 * Search routine is copied from the Dallas owpd library with mods
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4 * available from here http://www.ibutton.com/software/1wire/wirekit.html
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5 *
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6 * $Id$
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7 *
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8 * Copyright (c) 2004
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9 * Daniel O'Connor <darius@dons.net.au>. All rights reserved.
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10 *
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11 * Redistribution and use in source and binary forms, with or without
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12 * modification, are permitted provided that the following conditions
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13 * are met:
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14 * 1. Redistributions of source code must retain the above copyright
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15 * notice, this list of conditions and the following disclaimer.
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16 * 2. Redistributions in binary form must reproduce the above copyright
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17 * notice, this list of conditions and the following disclaimer in the
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18 * documentation and/or other materials provided with the distribution.
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19 *
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20 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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23 * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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30 * SUCH DAMAGE.
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31 */
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32
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33 /*
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34 * No user servicable parts inside
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35 *
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36 * Modify 1wire-config.h
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37 */
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38
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39 #include <stdio.h>
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40 #include <stdint.h>
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41 #include "1wire-config.h"
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42 #include "1wire.h"
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43
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44 static uint8_t OW_LastDevice = 0;
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45 static uint8_t OW_LastDiscrepancy = 0;
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46 static uint8_t OW_LastFamilyDiscrepancy = 0;
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47
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48 const PROGMEM char *OWProgROM_Status[] = {
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49 "OK",
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50 "no HW support",
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51 "Invalid params",
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52 "module missing/broken"
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53 };
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54
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55 /*-----------------------------------------------------------------------------
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56 * Configure the IO port as we need
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57 */
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58 void
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59 OWInit(void) {
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60 OWBUSINIT();
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61 OWSETBUSHIGH();
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62 }
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63
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64 /*-----------------------------------------------------------------------------
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65 * Generate a 1-Wire reset, return 0 if presence pulse was found, 1 if it
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66 * wasn't, or 2 if the line appears to be being held low.
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67 *
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68 * (NOTE: Does not handle alarm presence from DS2404/DS1994)
68
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69 *
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70 * XXX: should use #defines
13
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71 */
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72 uint8_t
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73 OWTouchReset(void) {
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74 uint8_t i;
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75
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76 OWDELAY_G;
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77
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78 /* Check the bus isn't being held low (ie it's broken) Do it after
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79 * the delay so we guarantee we don't see a slave from a previous
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80 * comms attempt
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81 */
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82 #if 1
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83 OWSETREAD();
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84 if(OWREADBUS() == 0)
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85 return 2;
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86 #endif
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87
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88 OWSETBUSLOW();
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89 OWDELAY_H;
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90 OWSETBUSHIGH();
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91 OWDELAY_I;
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92
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93 OWSETREAD();
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94 i = OWREADBUS();
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95
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96 OWDELAY_J;
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97 return(i);
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98 }
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99
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100 /*-----------------------------------------------------------------------------
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101 * Send a 1-wire write bit.
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102 */
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103 void
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104 OWWriteBit(uint8_t bit) {
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105 OWDELAY_I;
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106
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107 if (bit) {
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108 OWSETBUSLOW();
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109 OWDELAY_A;
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110 OWSETBUSHIGH();
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111 OWDELAY_B;
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112 } else {
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113 OWSETBUSLOW();
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114 OWDELAY_C;
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115 OWSETBUSHIGH();
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116 OWDELAY_D;
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117 }
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118 }
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119
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120 /*-----------------------------------------------------------------------------
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121 * Read a bit from the 1-wire bus and return it.
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122 */
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123 uint8_t
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124 OWReadBit(void) {
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125 uint8_t i;
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126
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127 OWDELAY_I;
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128
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129 OWSETBUSLOW();
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130 OWDELAY_A;
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131 OWSETBUSHIGH();
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132 OWDELAY_E;
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133 OWSETREAD();
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134 i = OWREADBUS();
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135 OWDELAY_F;
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136 return(i);
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137 }
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138
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139 /*-----------------------------------------------------------------------------
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140 * Write a byte to the 1-wire bus
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141 */
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142 void
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143 OWWriteByte(uint8_t data) {
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144 uint8_t i;
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145
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146 /* Send LSB first */
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147 for (i = 0; i < 8; i++) {
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148 OWWriteBit(data & 0x01);
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149 data >>= 1;
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150 }
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151 }
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152
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153 /*-----------------------------------------------------------------------------
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154 * Read a byte from the 1-wire bus
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155 */
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156 uint8_t
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157 OWReadByte(void) {
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158 int i, result = 0;
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159
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160 for (i = 0; i < 8; i++) {
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161 result >>= 1;
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162 if (OWReadBit())
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163 result |= 0x80;
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164 }
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165 return(result);
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166 }
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167
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168 /*-----------------------------------------------------------------------------
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
169 * Write a 1-wire data byte and return the sampled result.
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
170 */
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
171 uint8_t
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
172 OWTouchByte(uint8_t data) {
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
173 uint8_t i, result = 0;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
174
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
175 for (i = 0; i < 8; i++) {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
176 result >>= 1;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
177
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
178 /* If sending a 1 then read a bit, otherwise write a 0 */
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
179 if (data & 0x01) {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
180 if (OWReadBit())
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
181 result |= 0x80;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
182 } else
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
183 OWWriteBit(0);
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
184
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
185 data >>= 1;
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
186 }
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
187
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
188 return(result);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
189 }
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
190
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
191 /*-----------------------------------------------------------------------------
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
192 * Write a block of bytes to the 1-wire bus and return the sampled result in
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
193 * the same buffer
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
194 */
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
195 void
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
196 OWBlock(uint8_t *data, int len) {
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
197 int i;
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
198
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
199 for (i = 0; i < len; i++)
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
200 data[i] = OWTouchByte(data[i]);
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
201 }
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
202
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
203
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
204 /*-----------------------------------------------------------------------------
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
205 * Send a 1 wire command to a device, or all if no ROM ID provided
68
cc998b0b2bae Handle missing modules in OWGetTemp.
Daniel O'Connor <darius@dons.net.au>
parents: 39
diff changeset
206 * Returns same values as OWTouchReset
13
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
207 */
68
cc998b0b2bae Handle missing modules in OWGetTemp.
Daniel O'Connor <darius@dons.net.au>
parents: 39
diff changeset
208 uint8_t
13
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
209 OWSendCmd(uint8_t *ROM, uint8_t cmd) {
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
210 uint8_t i;
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
211
68
cc998b0b2bae Handle missing modules in OWGetTemp.
Daniel O'Connor <darius@dons.net.au>
parents: 39
diff changeset
212 if ((i = OWTouchReset()) != 0)
cc998b0b2bae Handle missing modules in OWGetTemp.
Daniel O'Connor <darius@dons.net.au>
parents: 39
diff changeset
213 return i;
13
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
214
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
215 if (ROM == NULL)
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
216 OWWriteByte(OW_SKIP_ROM_CMD);
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
217 else {
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
218 OWWriteByte(OW_MATCH_ROM_CMD);
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
219 for (i = 0; i < 8; i++)
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
220 OWWriteByte(ROM[i]);
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
221 }
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
222 OWWriteByte(cmd);
68
cc998b0b2bae Handle missing modules in OWGetTemp.
Daniel O'Connor <darius@dons.net.au>
parents: 39
diff changeset
223
cc998b0b2bae Handle missing modules in OWGetTemp.
Daniel O'Connor <darius@dons.net.au>
parents: 39
diff changeset
224 return 0;
13
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
225 }
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
226
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
227 /*-----------------------------------------------------------------------------
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
228 * Search algorithm from App note 187 (and 162)
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
229 *
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
230 * OWFirst/OWNext return..
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
231 * 1 when something is found,
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
232 * 0 no more modules
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
233 * -1 if no presence pulse,
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
234 * -2 if bad CRC,
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
235 * -3 if bad wiring.
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
236 */
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
237 uint8_t
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
238 OWFirst(uint8_t *ROM, uint8_t do_reset, uint8_t alarm_only) {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
239 /* Reset state */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
240 OW_LastDiscrepancy = 0;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
241 OW_LastDevice = 0;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
242 OW_LastFamilyDiscrepancy = 0;
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
243
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
244 /* Go looking */
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
245 return (OWNext(ROM, do_reset, alarm_only));
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
246 }
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
247
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
248 /* Returns 1 when something is found, 0 if nothing left */
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
249 uint8_t
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
250 OWNext(uint8_t *ROM, uint8_t do_reset, uint8_t alarm_only) {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
251 uint8_t bit_test, search_direction, bit_number;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
252 uint8_t last_zero, rom_byte_number, rom_byte_mask;
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
253 uint8_t lastcrc8, crcaccum;
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
254 int8_t next_result;
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
255
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
256 /* Init for search */
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
257 bit_number = 1;
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
258 last_zero = 0;
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
259 rom_byte_number = 0;
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
260 rom_byte_mask = 1;
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
261 next_result = OW_NOMODULES;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
262 lastcrc8 = 0;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
263 crcaccum = 0;
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
264
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
265 /* if the last call was not the last one */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
266 if (!OW_LastDevice) {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
267 /* check if reset first is requested */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
268 if (do_reset) {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
269 /* reset the 1-wire
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
270 * if there are no parts on 1-wire, return 0 */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
271 OWPUTSP(PSTR("Resetting\r\n"));
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
272 switch (OWTouchReset()) {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
273 case 0:
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
274 OWPUTSP(PSTR("Found device(s)\r\n"));
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
275 break;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
276
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
277 case 1:
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
278 /* reset the search */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
279 OW_LastDiscrepancy = 0;
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Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
280 OW_LastFamilyDiscrepancy = 0;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
281 OWPUTSP(PSTR("No devices on bus\r\n"));
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
282 return OW_NOPRESENCE;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
283 break;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
284
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
285 case 2:
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
286 /* reset the search */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
287 OW_LastDiscrepancy = 0;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
288 OW_LastFamilyDiscrepancy = 0;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
289 OWPUTSP(PSTR("Bus appears to be being held low\r\n"));
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
290 return OW_BADWIRE;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
291 break;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
292
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
293 }
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
294 }
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
295
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
296 /* If finding alarming devices issue a different command */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
297 if (alarm_only)
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
298 OWWriteByte(OW_SEARCH_ALRM_CMD); /* issue the alarming search command */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
299 else
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
300 OWWriteByte(OW_SEARCH_ROM_CMD); /* issue the search command */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
301
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
302 /* pause before beginning the search */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
303 OWDELAY_I;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
304 OWDELAY_I;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
305 OWDELAY_I;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
306
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
307 /* loop to do the search */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
308 do {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
309 /* read a bit and its compliment */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
310 bit_test = OWReadBit() << 1;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
311 bit_test |= OWReadBit();
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
312
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
313 OWPRINTFP(PSTR("bit_test = %d\r\n"), bit_test);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
314
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
315 /* check for no devices on 1-wire */
39
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
316 if (bit_test == 3)
13
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
317 return(OW_BADWIRE);
39
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
318
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
319 /* all devices coupled have 0 or 1 */
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
320 if (bit_test > 0)
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
321 search_direction = !(bit_test & 0x01); /* bit write value for search */
13
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
322 else {
39
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
323 /* if this discrepancy is before the Last Discrepancy
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
324 * on a previous OWNext then pick the same as last time */
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
325 if (bit_number < OW_LastDiscrepancy)
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
326 search_direction = ((ROM[rom_byte_number] & rom_byte_mask) > 0);
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
327 else
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
328 /* if equal to last pick 1, if not then pick 0 */
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
329 search_direction = (bit_number == OW_LastDiscrepancy);
13
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
330
39
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
331 /* if 0 was picked then record its position in LastZero */
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
332 if (search_direction == 0) {
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
333 last_zero = bit_number;
13
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
334
39
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
335 /* check for Last discrepancy in family */
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
336 if (last_zero < 9)
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
337 OW_LastFamilyDiscrepancy = last_zero;
13
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
338 }
39
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
339 }
13
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
340
39
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
341 /* set or clear the bit in the ROM byte rom_byte_number
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
342 * with mask rom_byte_mask */
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
343 if (search_direction == 1)
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
344 ROM[rom_byte_number] |= rom_byte_mask;
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
345 else
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
346 ROM[rom_byte_number] &= ~rom_byte_mask;
13
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
347
39
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
348 /* serial number search direction write bit */
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
349 OWWriteBit(search_direction);
13
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
350
39
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
351 /* increment the byte counter bit_number
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
352 * and shift the mask rom_byte_mask */
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
353 bit_number++;
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
354 rom_byte_mask <<= 1;
13
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
355
39
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
356 /* if the mask is 0 then go to new ROM byte rom_byte_number
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
357 * and reset mask */
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
358 if (rom_byte_mask == 0) {
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
359 OWCRC(ROM[rom_byte_number], &crcaccum); /* accumulate the CRC */
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
360 lastcrc8 = crcaccum;
13
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
361
39
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
362 rom_byte_number++;
969bb070b181 - Remove superfluous debug message.
Daniel O'Connor <darius@dons.net.au>
parents: 13
diff changeset
363 rom_byte_mask = 1;
13
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
364 }
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
365 } while (rom_byte_number < 8); /* loop until through all ROM bytes 0-7 */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
366
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
367 /* if the search was successful then */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
368 if (!(bit_number < 65) || lastcrc8) {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
369 if (lastcrc8) {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
370 OWPRINTFP(PSTR("Bad CRC (%d)\r\n"), lastcrc8);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
371 next_result = OW_BADCRC;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
372 } else {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
373 /* search successful so set LastDiscrepancy,LastDevice,next_result */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
374 OW_LastDiscrepancy = last_zero;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
375 OW_LastDevice = (OW_LastDiscrepancy == 0);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
376 OWPRINTFP(PSTR("Last device = %d\r\n"), OW_LastDevice);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
377 next_result = OW_FOUND;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
378 }
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
379 }
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
380 }
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
381
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
382 /* if no device found then reset counters so next 'next' will be
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
383 * like a first */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
384 if (next_result != OW_FOUND || ROM[0] == 0) {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
385 OW_LastDiscrepancy = 0;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
386 OW_LastDevice = 0;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
387 OW_LastFamilyDiscrepancy = 0;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
388 }
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
389
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
390 if (next_result == OW_FOUND && ROM[0] == 0x00)
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
391 next_result = OW_BADWIRE;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
392
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
393 return next_result;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
394
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
395 }
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
396
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
397 uint8_t PROGMEM dscrc_table[] = {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
398 0, 94, 188, 226, 97, 63, 221, 131, 194, 156, 126, 32, 163, 253, 31, 65,
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
399 157, 195, 33, 127, 252, 162, 64, 30, 95, 1, 227, 189, 62, 96, 130, 220,
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
400 35, 125, 159, 193, 66, 28, 254, 160, 225, 191, 93, 3, 128, 222, 60, 98,
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
401 190, 224, 2, 92, 223, 129, 99, 61, 124, 34, 192, 158, 29, 67, 161, 255,
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
402 70, 24, 250, 164, 39, 121, 155, 197, 132, 218, 56, 102, 229, 187, 89, 7,
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
403 219, 133,103, 57, 186, 228, 6, 88, 25, 71, 165, 251, 120, 38, 196, 154,
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
404 101, 59, 217, 135, 4, 90, 184, 230, 167, 249, 27, 69, 198, 152, 122, 36,
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
405 248, 166, 68, 26, 153, 199, 37, 123, 58, 100, 134, 216, 91, 5, 231, 185,
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
406 140,210, 48, 110, 237, 179, 81, 15, 78, 16, 242, 172, 47, 113,147, 205,
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
407 17, 79, 173, 243, 112, 46, 204, 146, 211,141, 111, 49, 178, 236, 14, 80,
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
408 175, 241, 19, 77, 206, 144, 114, 44, 109, 51, 209, 143, 12, 82,176, 238,
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
409 50, 108, 142, 208, 83, 13, 239, 177, 240, 174, 76, 18, 145, 207, 45, 115,
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
410 202, 148, 118, 40, 171, 245, 23, 73, 8, 86, 180, 234, 105, 55, 213, 139,
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
411 87, 9, 235, 181, 54, 104, 138, 212, 149, 203, 41, 119, 244, 170, 72, 22,
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
412 233, 183, 85, 11, 136, 214, 52, 106, 43, 117, 151, 201, 74, 20, 246, 168,
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
413 116, 42, 200, 150, 21, 75, 169, 247, 182, 232, 10, 84, 215, 137, 107, 53
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
414 };
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
415
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
416 /*-----------------------------------------------------------------------------
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
417 * Update *crc based on the value of x
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
418 */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
419 void
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
420 OWCRC(uint8_t x, uint8_t *crc) {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
421 *crc = pgm_read_byte(&dscrc_table[(*crc) ^ x]);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
422 }
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
423
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
424 /*-----------------------------------------------------------------------------
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
425 * Program a DS2502's memory
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
426 *
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
427 * Arguments
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
428 * ROM - ROM ID (or NULL to send SKIP_ROM)
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
429 * start - Start address (bytes)
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
430 * len - Length of data to write
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
431 * data - Data to write
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
432 * exact - If true, only accept exact matches for programming,
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
433 * otherwise only ensure the bits we requested were
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
434 * programmed [to 0]
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
435 * status - If true program status rather than memory
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
436 *
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
437 * Returns..
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
438 * 0 if all is OK
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
439 * 1 if the programming is not possible
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
440 * 2 if the parameters were invalid
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
441 * 3 if the DS2502 didn't respond appropriately (also happens if the
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
442 * module doesn't exist)
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
443 */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
444 #if defined(OWSETVPPON) && defined(OWSETVPPOFF)
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
445 uint8_t
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
446 OWProgROM(uint8_t *ROM, uint8_t start, uint8_t len, uint8_t *data, uint8_t exact, uint8_t status) {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
447 uint8_t crc, i, tmp;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
448
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
449 /* Stupid programmer detection */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
450 if (status) {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
451 if (start + len > 3)
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
452 return(2);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
453 } else {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
454 if (start + len > 127)
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
455 return(2);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
456 }
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
457
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
458 if (len < 1)
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
459 return(2);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
460
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
461 OWDELAY_I;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
462 if (OWTouchReset() != 0) {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
463 cons_putsP(PSTR("No presence pulse\r\n"));
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
464 return(3);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
465 }
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
466
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
467 crc = 0;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
468
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
469 /* Send the command */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
470 if (status) {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
471 OWSendCmd(ROM, OW_WRITE_STATUS);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
472 OWCRC(OW_WRITE_STATUS, &crc);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
473 } else {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
474 OWSendCmd(ROM, OW_WRITE_MEMORY);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
475 OWCRC(OW_WRITE_MEMORY, &crc);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
476 }
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
477
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
478 /* And the start address
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
479 * (2 bytes even though one would do)
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
480 */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
481 OWWriteByte(start);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
482 OWCRC(start, &crc);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
483
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
484 OWWriteByte(0x00);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
485 OWCRC(0x00, &crc);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
486
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
487 for (i = 0; i < len; i++) {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
488 cons_putsP(PSTR("Programming "));
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
489 cons_puts_hex(data[i]);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
490 cons_putsP(PSTR(" to "));
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
491 cons_puts_hex(start + i);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
492 cons_putsP(PSTR("\r\n"));
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
493
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
494 OWWriteByte(data[i]);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
495 OWCRC(data[i], &crc);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
496
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
497 tmp = OWReadByte();
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
498
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
499 if (crc != tmp) {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
500 cons_putsP(PSTR("CRC mismatch "));
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
501 cons_puts_hex(crc);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
502 cons_putsP(PSTR(" vs "));
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
503 cons_puts_hex(tmp);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
504 cons_putsP(PSTR("\r\n"));
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
505
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
506 OWTouchReset();
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
507 return(3);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
508 }
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
509
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
510 OWSETVPPON();
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
511 OWDELAY_H;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
512 OWSETVPPOFF();
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
513
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
514 tmp = OWReadByte();
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
515
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
516 /* Check the bits we turned off are off */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
517 /*
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
518 for (i = 0; i < 8; i++)
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
519 if (!(data[i] & 1 << i) && (tmp & 1 << i))
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
520 return(-3);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
521 */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
522 if ((!data[i] & tmp) != 0) {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
523 cons_putsP(PSTR("Readback mismatch "));
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
524 cons_puts_hex(data[i]);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
525 cons_putsP(PSTR(" vs "));
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
526 cons_puts_hex(data[i]);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
527 cons_putsP(PSTR("\r\n"));
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
528
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
529 OWTouchReset();
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
530 return(3);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
531 }
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
532
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
533 /* The DS2502 loads it's CRC register with the address of the
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
534 * next byte */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
535 crc = 0;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
536 OWCRC(start + i + 1, &crc);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
537 }
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
538
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
539 return(0);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
540 }
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
541 #else
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
542 uint8_t
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
543 OWProgROM(uint8_t *ROM __attribute((unused)), uint8_t start __attribute((unused)), uint8_t len __attribute((unused)), uint8_t *data __attribute((unused)), uint8_t exact __attribute((unused)), uint8_t status __attribute((unused))) {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
544 return(1);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
545 }
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
546 #endif
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
547
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
548 /*
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
549 * OWGetTemp
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
550 *
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
551 * Get the temperature from a 1wire bus module
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
552 *
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
553 * Returns temperature in hundredths of a degree or OW_TEMP_xxx on
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
554 * error.
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
555 */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
556 int16_t
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
557 OWGetTemp(uint8_t *ROM) {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
558 int8_t i;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
559 uint8_t crc, buf[9];
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
560 int16_t temp;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
561 int16_t tfrac;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
562
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
563 if (ROM[0] != OW_FAMILY_TEMP)
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
564 return OW_TEMP_WRONG_FAM;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
565
68
cc998b0b2bae Handle missing modules in OWGetTemp.
Daniel O'Connor <darius@dons.net.au>
parents: 39
diff changeset
566 switch (OWSendCmd(ROM, OW_CONVERTT_CMD)) {
cc998b0b2bae Handle missing modules in OWGetTemp.
Daniel O'Connor <darius@dons.net.au>
parents: 39
diff changeset
567 case 0:
cc998b0b2bae Handle missing modules in OWGetTemp.
Daniel O'Connor <darius@dons.net.au>
parents: 39
diff changeset
568 break;
cc998b0b2bae Handle missing modules in OWGetTemp.
Daniel O'Connor <darius@dons.net.au>
parents: 39
diff changeset
569
cc998b0b2bae Handle missing modules in OWGetTemp.
Daniel O'Connor <darius@dons.net.au>
parents: 39
diff changeset
570 case 1:
cc998b0b2bae Handle missing modules in OWGetTemp.
Daniel O'Connor <darius@dons.net.au>
parents: 39
diff changeset
571 case 2:
cc998b0b2bae Handle missing modules in OWGetTemp.
Daniel O'Connor <darius@dons.net.au>
parents: 39
diff changeset
572 return OW_TEMP_NO_ROM;
cc998b0b2bae Handle missing modules in OWGetTemp.
Daniel O'Connor <darius@dons.net.au>
parents: 39
diff changeset
573 }
cc998b0b2bae Handle missing modules in OWGetTemp.
Daniel O'Connor <darius@dons.net.au>
parents: 39
diff changeset
574
13
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
575 i = 0;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
576
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
577 /* Wait for the conversion */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
578 while (OWReadBit() == 0)
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
579 i = 1;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
580
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
581 /* Check that we talked to a module and it did something */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
582 if (i == 0) {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
583 return OW_TEMP_NO_ROM;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
584 }
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
585
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
586 OWSendCmd(ROM, OW_RD_SCR_CMD);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
587 crc = 0;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
588 for (i = 0; i < 8; i++) {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
589 buf[i] = OWReadByte();
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
590 OWCRC(buf[i], &crc);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
591 }
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
592 buf[i] = OWReadByte();
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
593 if (crc != buf[8])
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
594 return OW_TEMP_CRC_ERR;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
595 temp = buf[0];
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
596 if (buf[1] & 0x80)
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
597 temp -= 256;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
598
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
599 /* Chop off 0.5 degree bit */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
600 temp >>= 1;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
601
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
602 /* Calulate the fractional remainder */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
603 tfrac = buf[7] - buf[6];
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
604
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
605 /* Work in 100'th of degreess to save on floats */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
606 tfrac *= (int16_t)100;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
607
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
608 /* Divide by count */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
609 tfrac /= buf[7];
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
610
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
611 /* Subtract 0.25 deg from temp */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
612 tfrac += 75;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
613 if (tfrac < 100)
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
614 temp--;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
615 else
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
616 tfrac -= 100;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
617
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
618 i = temp;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
619 temp *= 100;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
620 temp += tfrac;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
621
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
622 return(temp);
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
623 }
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
624
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
625 /*
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
626 * OWTempStatusStr
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
627 *
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
628 * Return a string for each OW_TEMP_xxx error code
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
629 *
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
630 * shrt = 1 returns short strings
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
631 *
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
632 */
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
633 const char *
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
634 OWTempStatusStr(int16_t val, uint8_t shrt) {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
635 if (val > OW_TEMP_BADVAL) {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
636 if (shrt)
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
637 return PSTR("OK");
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
638 else
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
639 return PSTR("OK");
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
640 }
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
641
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
642 switch (val) {
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
643 case OW_TEMP_WRONG_FAM:
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
644 if (shrt)
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
645 return PSTR("WrFam");
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
646 else
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
647 return PSTR("Wrong family");
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
648 break;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
649 case OW_TEMP_CRC_ERR:
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
650 if (shrt)
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
651 return PSTR("CRCErr");
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
652 else
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
653 return PSTR("CRC Error");
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
654 break;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
655 case OW_TEMP_NO_ROM:
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
656 if (shrt)
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
657 return PSTR("NoROM");
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
658 else
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
659 return PSTR("ROM did not reply");
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
660 break;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
661 default:
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
662 if (shrt)
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
663 return PSTR("???");
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
664 else
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
665 return PSTR("Unknown error code");
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
666 break;
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
667 }
96c345d304af Add 1wire code.
Daniel O'Connor <darius@dons.net.au>
parents:
diff changeset
668 }