Implementation of 1-Wire with added Alarm Search Functionality
Dependents: Max32630_One_Wire_Interface
OneWire_Masters/DS248x/ds248x.cpp@6:1faafa0b3cd7, 2016-02-09 (annotated)
- Committer:
- j3
- Date:
- Tue Feb 09 20:08:51 2016 +0000
- Revision:
- 6:1faafa0b3cd7
- Parent:
- 5:ce108eeb878d
- Child:
- 14:7b2886a50321
removed private constructor for setting i2c adrs from Ds248x class and added private fx which is used in body of other constructors.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
j3 | 1:91e52f8ab8bf | 1 | /******************************************************************//** |
j3 | 1:91e52f8ab8bf | 2 | * @file ds248x.cpp |
j3 | 1:91e52f8ab8bf | 3 | * |
j3 | 1:91e52f8ab8bf | 4 | * @author Justin Jordan |
j3 | 1:91e52f8ab8bf | 5 | * |
j3 | 1:91e52f8ab8bf | 6 | * @version 0.0.0 |
j3 | 1:91e52f8ab8bf | 7 | * |
j3 | 1:91e52f8ab8bf | 8 | * Started: 30JAN16 |
j3 | 1:91e52f8ab8bf | 9 | * |
j3 | 1:91e52f8ab8bf | 10 | * Updated: |
j3 | 1:91e52f8ab8bf | 11 | * |
j3 | 1:91e52f8ab8bf | 12 | * @brief Source file for Ds248x I2C to 1-wire master |
j3 | 1:91e52f8ab8bf | 13 | *********************************************************************** |
j3 | 1:91e52f8ab8bf | 14 | * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved. |
j3 | 1:91e52f8ab8bf | 15 | * |
j3 | 1:91e52f8ab8bf | 16 | * Permission is hereby granted, free of charge, to any person obtaining a |
j3 | 1:91e52f8ab8bf | 17 | * copy of this software and associated documentation files (the "Software"), |
j3 | 1:91e52f8ab8bf | 18 | * to deal in the Software without restriction, including without limitation |
j3 | 1:91e52f8ab8bf | 19 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
j3 | 1:91e52f8ab8bf | 20 | * and/or sell copies of the Software, and to permit persons to whom the |
j3 | 1:91e52f8ab8bf | 21 | * Software is furnished to do so, subject to the following conditions: |
j3 | 1:91e52f8ab8bf | 22 | * |
j3 | 1:91e52f8ab8bf | 23 | * The above copyright notice and this permission notice shall be included |
j3 | 1:91e52f8ab8bf | 24 | * in all copies or substantial portions of the Software. |
j3 | 1:91e52f8ab8bf | 25 | * |
j3 | 1:91e52f8ab8bf | 26 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS |
j3 | 1:91e52f8ab8bf | 27 | * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
j3 | 1:91e52f8ab8bf | 28 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
j3 | 1:91e52f8ab8bf | 29 | * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES |
j3 | 1:91e52f8ab8bf | 30 | * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, |
j3 | 1:91e52f8ab8bf | 31 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR |
j3 | 1:91e52f8ab8bf | 32 | * OTHER DEALINGS IN THE SOFTWARE. |
j3 | 1:91e52f8ab8bf | 33 | * |
j3 | 1:91e52f8ab8bf | 34 | * Except as contained in this notice, the name of Maxim Integrated |
j3 | 1:91e52f8ab8bf | 35 | * Products, Inc. shall not be used except as stated in the Maxim Integrated |
j3 | 1:91e52f8ab8bf | 36 | * Products, Inc. Branding Policy. |
j3 | 1:91e52f8ab8bf | 37 | * |
j3 | 1:91e52f8ab8bf | 38 | * The mere transfer of this software does not imply any licenses |
j3 | 1:91e52f8ab8bf | 39 | * of trade secrets, proprietary technology, copyrights, patents, |
j3 | 1:91e52f8ab8bf | 40 | * trademarks, maskwork rights, or any other form of intellectual |
j3 | 1:91e52f8ab8bf | 41 | * property whatsoever. Maxim Integrated Products, Inc. retains all |
j3 | 1:91e52f8ab8bf | 42 | * ownership rights. |
j3 | 1:91e52f8ab8bf | 43 | **********************************************************************/ |
j3 | 1:91e52f8ab8bf | 44 | |
j3 | 1:91e52f8ab8bf | 45 | |
j3 | 1:91e52f8ab8bf | 46 | #include "ds248x.h" |
j3 | 1:91e52f8ab8bf | 47 | |
j3 | 1:91e52f8ab8bf | 48 | |
j3 | 1:91e52f8ab8bf | 49 | //********************************************************************* |
j3 | 5:ce108eeb878d | 50 | Ds248x::Ds248x(I2C &i2c_bus, DS248X_I2C_ADRS adrs) |
j3 | 6:1faafa0b3cd7 | 51 | :_p_i2c_bus(&i2c_bus), _i2c_owner(false) |
j3 | 1:91e52f8ab8bf | 52 | { |
j3 | 6:1faafa0b3cd7 | 53 | set_i2c_adrs(adrs); |
j3 | 1:91e52f8ab8bf | 54 | } |
j3 | 1:91e52f8ab8bf | 55 | |
j3 | 1:91e52f8ab8bf | 56 | |
j3 | 1:91e52f8ab8bf | 57 | //********************************************************************* |
j3 | 5:ce108eeb878d | 58 | Ds248x::Ds248x(PinName sda, PinName scl, DS248X_I2C_ADRS adrs) |
j3 | 6:1faafa0b3cd7 | 59 | :_p_i2c_bus(new I2C(sda, scl)), _i2c_owner(true) |
j3 | 1:91e52f8ab8bf | 60 | { |
j3 | 6:1faafa0b3cd7 | 61 | set_i2c_adrs(adrs); |
j3 | 1:91e52f8ab8bf | 62 | } |
j3 | 1:91e52f8ab8bf | 63 | |
j3 | 1:91e52f8ab8bf | 64 | |
j3 | 1:91e52f8ab8bf | 65 | //********************************************************************* |
j3 | 1:91e52f8ab8bf | 66 | Ds248x::~Ds248x() |
j3 | 1:91e52f8ab8bf | 67 | { |
j3 | 5:ce108eeb878d | 68 | if(_i2c_owner) |
j3 | 1:91e52f8ab8bf | 69 | { |
j3 | 1:91e52f8ab8bf | 70 | delete _p_i2c_bus; |
j3 | 1:91e52f8ab8bf | 71 | } |
j3 | 1:91e52f8ab8bf | 72 | } |
j3 | 1:91e52f8ab8bf | 73 | |
j3 | 1:91e52f8ab8bf | 74 | |
j3 | 1:91e52f8ab8bf | 75 | //********************************************************************* |
j3 | 2:02d228c25fd4 | 76 | bool Ds248x::detect(void) |
j3 | 2:02d228c25fd4 | 77 | { |
j3 | 2:02d228c25fd4 | 78 | bool rtn_val = false; |
j3 | 2:02d228c25fd4 | 79 | |
j3 | 2:02d228c25fd4 | 80 | // reset the ds2484 ON selected address |
j3 | 2:02d228c25fd4 | 81 | if (!reset()) |
j3 | 2:02d228c25fd4 | 82 | { |
j3 | 2:02d228c25fd4 | 83 | rtn_val = false; |
j3 | 2:02d228c25fd4 | 84 | } |
j3 | 2:02d228c25fd4 | 85 | else |
j3 | 2:02d228c25fd4 | 86 | { |
j3 | 2:02d228c25fd4 | 87 | // default configuration |
j3 | 5:ce108eeb878d | 88 | _c1WS = false; |
j3 | 5:ce108eeb878d | 89 | _cSPU = false; |
j3 | 5:ce108eeb878d | 90 | _cPDN = false; |
j3 | 5:ce108eeb878d | 91 | _cAPU = false; |
j3 | 2:02d228c25fd4 | 92 | |
j3 | 2:02d228c25fd4 | 93 | // write the default configuration setup |
j3 | 2:02d228c25fd4 | 94 | if (!write_config(_c1WS | _cSPU | _cPDN | _cAPU)) |
j3 | 2:02d228c25fd4 | 95 | { |
j3 | 2:02d228c25fd4 | 96 | rtn_val = false; |
j3 | 2:02d228c25fd4 | 97 | } |
j3 | 2:02d228c25fd4 | 98 | else |
j3 | 2:02d228c25fd4 | 99 | { |
j3 | 2:02d228c25fd4 | 100 | rtn_val = true; |
j3 | 2:02d228c25fd4 | 101 | } |
j3 | 2:02d228c25fd4 | 102 | } |
j3 | 2:02d228c25fd4 | 103 | |
j3 | 2:02d228c25fd4 | 104 | return(rtn_val); |
j3 | 2:02d228c25fd4 | 105 | } |
j3 | 2:02d228c25fd4 | 106 | |
j3 | 2:02d228c25fd4 | 107 | |
j3 | 2:02d228c25fd4 | 108 | //********************************************************************* |
j3 | 2:02d228c25fd4 | 109 | bool Ds248x::reset(void) |
j3 | 1:91e52f8ab8bf | 110 | { |
j3 | 2:02d228c25fd4 | 111 | char status; |
j3 | 2:02d228c25fd4 | 112 | char packet[] = {CMD_DRST}; |
j3 | 2:02d228c25fd4 | 113 | |
j3 | 2:02d228c25fd4 | 114 | // Device Reset |
j3 | 2:02d228c25fd4 | 115 | // S AD,0 [A] DRST [A] Sr AD,1 [A] [SS] A\ P |
j3 | 2:02d228c25fd4 | 116 | // [] indicates from slave |
j3 | 2:02d228c25fd4 | 117 | // SS status byte to read to verify state |
j3 | 2:02d228c25fd4 | 118 | |
j3 | 2:02d228c25fd4 | 119 | _p_i2c_bus->write(_w_adrs, packet, 1); |
j3 | 2:02d228c25fd4 | 120 | _p_i2c_bus->read(_r_adrs, &status, 1); |
j3 | 2:02d228c25fd4 | 121 | |
j3 | 2:02d228c25fd4 | 122 | return((status & 0xF7) == 0x10); |
j3 | 2:02d228c25fd4 | 123 | } |
j3 | 2:02d228c25fd4 | 124 | |
j3 | 2:02d228c25fd4 | 125 | |
j3 | 2:02d228c25fd4 | 126 | //********************************************************************* |
j3 | 2:02d228c25fd4 | 127 | bool Ds248x::write_config(uint8_t config) |
j3 | 2:02d228c25fd4 | 128 | { |
j3 | 2:02d228c25fd4 | 129 | bool rtn_val = false; |
j3 | 2:02d228c25fd4 | 130 | char read_config; |
j3 | 2:02d228c25fd4 | 131 | char packet [] = {CMD_WCFG, (config | (~config << 4))}; |
j3 | 2:02d228c25fd4 | 132 | |
j3 | 2:02d228c25fd4 | 133 | _p_i2c_bus->write(_w_adrs, packet, 2); |
j3 | 2:02d228c25fd4 | 134 | _p_i2c_bus->read(_r_adrs, &read_config, 1); |
j3 | 2:02d228c25fd4 | 135 | |
j3 | 2:02d228c25fd4 | 136 | // check for failure due to incorrect read back |
j3 | 2:02d228c25fd4 | 137 | if (config != read_config) |
j3 | 2:02d228c25fd4 | 138 | { |
j3 | 2:02d228c25fd4 | 139 | // handle error |
j3 | 2:02d228c25fd4 | 140 | // ... |
j3 | 2:02d228c25fd4 | 141 | reset(); |
j3 | 2:02d228c25fd4 | 142 | rtn_val = false; |
j3 | 2:02d228c25fd4 | 143 | } |
j3 | 2:02d228c25fd4 | 144 | else |
j3 | 2:02d228c25fd4 | 145 | { |
j3 | 2:02d228c25fd4 | 146 | rtn_val = true; |
j3 | 2:02d228c25fd4 | 147 | } |
j3 | 2:02d228c25fd4 | 148 | |
j3 | 1:91e52f8ab8bf | 149 | return(rtn_val); |
j3 | 1:91e52f8ab8bf | 150 | } |
j3 | 1:91e52f8ab8bf | 151 | |
j3 | 1:91e52f8ab8bf | 152 | |
j3 | 1:91e52f8ab8bf | 153 | //********************************************************************* |
j3 | 2:02d228c25fd4 | 154 | bool Ds248x::channel_select(uint8_t channel) |
j3 | 1:91e52f8ab8bf | 155 | { |
j3 | 2:02d228c25fd4 | 156 | |
j3 | 2:02d228c25fd4 | 157 | char ch, ch_read, check; |
j3 | 2:02d228c25fd4 | 158 | char packet [2]; |
j3 | 2:02d228c25fd4 | 159 | |
j3 | 2:02d228c25fd4 | 160 | packet[0] = CMD_CHSL; |
j3 | 2:02d228c25fd4 | 161 | |
j3 | 2:02d228c25fd4 | 162 | // Channel Select (Case A) |
j3 | 2:02d228c25fd4 | 163 | // S AD,0 [A] CHSL [A] CC [A] Sr AD,1 [A] [RR] A\ P |
j3 | 2:02d228c25fd4 | 164 | // [] indicates from slave |
j3 | 2:02d228c25fd4 | 165 | // CC channel value |
j3 | 2:02d228c25fd4 | 166 | // RR channel read back |
j3 | 2:02d228c25fd4 | 167 | |
j3 | 2:02d228c25fd4 | 168 | switch (channel) |
j3 | 2:02d228c25fd4 | 169 | { |
j3 | 2:02d228c25fd4 | 170 | default: case 0: ch = 0xF0; ch_read = 0xB8; break; |
j3 | 2:02d228c25fd4 | 171 | case 1: ch = 0xE1; ch_read = 0xB1; break; |
j3 | 2:02d228c25fd4 | 172 | case 2: ch = 0xD2; ch_read = 0xAA; break; |
j3 | 2:02d228c25fd4 | 173 | case 3: ch = 0xC3; ch_read = 0xA3; break; |
j3 | 2:02d228c25fd4 | 174 | case 4: ch = 0xB4; ch_read = 0x9C; break; |
j3 | 2:02d228c25fd4 | 175 | case 5: ch = 0xA5; ch_read = 0x95; break; |
j3 | 2:02d228c25fd4 | 176 | case 6: ch = 0x96; ch_read = 0x8E; break; |
j3 | 2:02d228c25fd4 | 177 | case 7: ch = 0x87; ch_read = 0x87; break; |
j3 | 2:02d228c25fd4 | 178 | }; |
j3 | 2:02d228c25fd4 | 179 | |
j3 | 2:02d228c25fd4 | 180 | packet[1] = ch; |
j3 | 2:02d228c25fd4 | 181 | |
j3 | 2:02d228c25fd4 | 182 | _p_i2c_bus->write(_w_adrs, packet, 2); |
j3 | 2:02d228c25fd4 | 183 | _p_i2c_bus->read(_r_adrs, &check, 1); |
j3 | 2:02d228c25fd4 | 184 | |
j3 | 2:02d228c25fd4 | 185 | // check for failure due to incorrect read back of channel |
j3 | 2:02d228c25fd4 | 186 | return (check == ch_read); |
j3 | 2:02d228c25fd4 | 187 | } |
j3 | 2:02d228c25fd4 | 188 | |
j3 | 2:02d228c25fd4 | 189 | |
j3 | 2:02d228c25fd4 | 190 | //********************************************************************* |
j3 | 2:02d228c25fd4 | 191 | bool Ds248x::adjust_timing(uint8_t param, uint8_t val) |
j3 | 2:02d228c25fd4 | 192 | { |
j3 | 2:02d228c25fd4 | 193 | bool rtn_val = false; |
j3 | 2:02d228c25fd4 | 194 | char read_port_config; |
j3 | 2:02d228c25fd4 | 195 | char control_byte; |
j3 | 2:02d228c25fd4 | 196 | |
j3 | 2:02d228c25fd4 | 197 | control_byte = (((param & 0x0F) << 4) | (val & 0x0F)); |
j3 | 2:02d228c25fd4 | 198 | |
j3 | 2:02d228c25fd4 | 199 | char packet [] = {CMD_A1WP, control_byte}; |
j3 | 2:02d228c25fd4 | 200 | |
j3 | 2:02d228c25fd4 | 201 | _p_i2c_bus->write(_w_adrs, packet, 2); |
j3 | 2:02d228c25fd4 | 202 | _p_i2c_bus->read(_r_adrs, &read_port_config, 1); |
j3 | 2:02d228c25fd4 | 203 | |
j3 | 2:02d228c25fd4 | 204 | // check for failure due to incorrect read back |
j3 | 2:02d228c25fd4 | 205 | if ((control_byte & 0x0F) != read_port_config) |
j3 | 2:02d228c25fd4 | 206 | { |
j3 | 2:02d228c25fd4 | 207 | // handle error |
j3 | 2:02d228c25fd4 | 208 | // ... |
j3 | 2:02d228c25fd4 | 209 | reset(); |
j3 | 2:02d228c25fd4 | 210 | |
j3 | 2:02d228c25fd4 | 211 | rtn_val = false; |
j3 | 2:02d228c25fd4 | 212 | } |
j3 | 2:02d228c25fd4 | 213 | else |
j3 | 2:02d228c25fd4 | 214 | { |
j3 | 2:02d228c25fd4 | 215 | rtn_val = true; |
j3 | 2:02d228c25fd4 | 216 | } |
j3 | 2:02d228c25fd4 | 217 | |
j3 | 2:02d228c25fd4 | 218 | return(rtn_val); |
j3 | 1:91e52f8ab8bf | 219 | } |
j3 | 1:91e52f8ab8bf | 220 | |
j3 | 1:91e52f8ab8bf | 221 | |
j3 | 1:91e52f8ab8bf | 222 | //********************************************************************* |
j3 | 2:02d228c25fd4 | 223 | uint8_t Ds248x::search_triplet(uint8_t search_direction) |
j3 | 1:91e52f8ab8bf | 224 | { |
j3 | 2:02d228c25fd4 | 225 | uint8_t rtn_val = 0; |
j3 | 2:02d228c25fd4 | 226 | uint8_t poll_count = 0; |
j3 | 2:02d228c25fd4 | 227 | char status; |
j3 | 2:02d228c25fd4 | 228 | char packet [] = {CMD_1WT, search_direction ? 0x80 : 0x00}; |
j3 | 2:02d228c25fd4 | 229 | |
j3 | 2:02d228c25fd4 | 230 | // 1-Wire Triplet (Case B) |
j3 | 2:02d228c25fd4 | 231 | // S AD,0 [A] 1WT [A] SS [A] Sr AD,1 [A] [Status] A [Status] A\ P |
j3 | 2:02d228c25fd4 | 232 | // \--------/ |
j3 | 2:02d228c25fd4 | 233 | // Repeat until 1WB bit has changed to 0 |
j3 | 2:02d228c25fd4 | 234 | // [] indicates from slave |
j3 | 2:02d228c25fd4 | 235 | // SS indicates byte containing search direction bit value in msbit |
j3 | 2:02d228c25fd4 | 236 | |
j3 | 2:02d228c25fd4 | 237 | _p_i2c_bus->write(_w_adrs, packet, 2); |
j3 | 2:02d228c25fd4 | 238 | |
j3 | 2:02d228c25fd4 | 239 | // loop checking 1WB bit for completion of 1-Wire operation |
j3 | 2:02d228c25fd4 | 240 | // abort if poll limit reached |
j3 | 2:02d228c25fd4 | 241 | do |
j3 | 2:02d228c25fd4 | 242 | { |
j3 | 2:02d228c25fd4 | 243 | _p_i2c_bus->read(_r_adrs, &status, 1); |
j3 | 2:02d228c25fd4 | 244 | } |
j3 | 2:02d228c25fd4 | 245 | while ((status & STATUS_1WB) && (poll_count++ < POLL_LIMIT)); |
j3 | 2:02d228c25fd4 | 246 | |
j3 | 2:02d228c25fd4 | 247 | // check for failure due to poll limit reached |
j3 | 2:02d228c25fd4 | 248 | if (poll_count >= POLL_LIMIT) |
j3 | 2:02d228c25fd4 | 249 | { |
j3 | 2:02d228c25fd4 | 250 | // handle error |
j3 | 2:02d228c25fd4 | 251 | // ... |
j3 | 2:02d228c25fd4 | 252 | reset(); |
j3 | 5:ce108eeb878d | 253 | rtn_val = false; |
j3 | 2:02d228c25fd4 | 254 | } |
j3 | 2:02d228c25fd4 | 255 | else |
j3 | 2:02d228c25fd4 | 256 | { |
j3 | 2:02d228c25fd4 | 257 | rtn_val = status; |
j3 | 2:02d228c25fd4 | 258 | } |
j3 | 2:02d228c25fd4 | 259 | |
j3 | 2:02d228c25fd4 | 260 | return(rtn_val); |
j3 | 1:91e52f8ab8bf | 261 | } |
j3 | 1:91e52f8ab8bf | 262 | |
j3 | 1:91e52f8ab8bf | 263 | |
j3 | 1:91e52f8ab8bf | 264 | //********************************************************************* |
j3 | 2:02d228c25fd4 | 265 | bool Ds248x::OWReset() |
j3 | 2:02d228c25fd4 | 266 | { |
j3 | 2:02d228c25fd4 | 267 | bool rtn_val = false; |
j3 | 2:02d228c25fd4 | 268 | |
j3 | 2:02d228c25fd4 | 269 | uint8_t poll_count = 0; |
j3 | 2:02d228c25fd4 | 270 | char status; |
j3 | 2:02d228c25fd4 | 271 | char packet [] = {CMD_1WRS}; |
j3 | 1:91e52f8ab8bf | 272 | |
j3 | 2:02d228c25fd4 | 273 | // 1-Wire reset (Case B) |
j3 | 2:02d228c25fd4 | 274 | // S AD,0 [A] 1WRS [A] Sr AD,1 [A] [Status] A [Status] A\ P |
j3 | 2:02d228c25fd4 | 275 | // \--------/ |
j3 | 2:02d228c25fd4 | 276 | // Repeat until 1WB bit has changed to 0 |
j3 | 2:02d228c25fd4 | 277 | // [] indicates from slave |
j3 | 2:02d228c25fd4 | 278 | |
j3 | 2:02d228c25fd4 | 279 | _p_i2c_bus->write(_w_adrs, packet, 1); |
j3 | 2:02d228c25fd4 | 280 | |
j3 | 2:02d228c25fd4 | 281 | // loop checking 1WB bit for completion of 1-Wire operation |
j3 | 2:02d228c25fd4 | 282 | // abort if poll limit reached |
j3 | 2:02d228c25fd4 | 283 | do |
j3 | 2:02d228c25fd4 | 284 | { |
j3 | 2:02d228c25fd4 | 285 | _p_i2c_bus->read(_r_adrs, &status, 1); |
j3 | 2:02d228c25fd4 | 286 | } |
j3 | 2:02d228c25fd4 | 287 | while ((status & STATUS_1WB) && (poll_count++ < POLL_LIMIT)); |
j3 | 1:91e52f8ab8bf | 288 | |
j3 | 2:02d228c25fd4 | 289 | // check for failure due to poll limit reached |
j3 | 2:02d228c25fd4 | 290 | if (poll_count >= POLL_LIMIT) |
j3 | 2:02d228c25fd4 | 291 | { |
j3 | 2:02d228c25fd4 | 292 | // handle error |
j3 | 2:02d228c25fd4 | 293 | // ... |
j3 | 2:02d228c25fd4 | 294 | reset(); |
j3 | 2:02d228c25fd4 | 295 | rtn_val = false; |
j3 | 2:02d228c25fd4 | 296 | } |
j3 | 2:02d228c25fd4 | 297 | else |
j3 | 2:02d228c25fd4 | 298 | { |
j3 | 2:02d228c25fd4 | 299 | // check for short condition |
j3 | 2:02d228c25fd4 | 300 | if (status & STATUS_SD) |
j3 | 2:02d228c25fd4 | 301 | { |
j3 | 5:ce108eeb878d | 302 | _short_detected = true; |
j3 | 2:02d228c25fd4 | 303 | } |
j3 | 2:02d228c25fd4 | 304 | else |
j3 | 2:02d228c25fd4 | 305 | { |
j3 | 5:ce108eeb878d | 306 | _short_detected = false; |
j3 | 2:02d228c25fd4 | 307 | } |
j3 | 2:02d228c25fd4 | 308 | |
j3 | 2:02d228c25fd4 | 309 | // check for presence detect |
j3 | 2:02d228c25fd4 | 310 | if (status & STATUS_PPD) |
j3 | 2:02d228c25fd4 | 311 | { |
j3 | 2:02d228c25fd4 | 312 | rtn_val = true; |
j3 | 2:02d228c25fd4 | 313 | } |
j3 | 2:02d228c25fd4 | 314 | else |
j3 | 2:02d228c25fd4 | 315 | { |
j3 | 2:02d228c25fd4 | 316 | rtn_val = false; |
j3 | 2:02d228c25fd4 | 317 | } |
j3 | 2:02d228c25fd4 | 318 | } |
j3 | 2:02d228c25fd4 | 319 | |
j3 | 1:91e52f8ab8bf | 320 | return(rtn_val); |
j3 | 1:91e52f8ab8bf | 321 | } |
j3 | 1:91e52f8ab8bf | 322 | |
j3 | 1:91e52f8ab8bf | 323 | |
j3 | 1:91e52f8ab8bf | 324 | //********************************************************************* |
j3 | 1:91e52f8ab8bf | 325 | void Ds248x::OWWriteBit(uint8_t sendbit) |
j3 | 1:91e52f8ab8bf | 326 | { |
j3 | 2:02d228c25fd4 | 327 | OWTouchBit(sendbit); |
j3 | 1:91e52f8ab8bf | 328 | } |
j3 | 1:91e52f8ab8bf | 329 | |
j3 | 1:91e52f8ab8bf | 330 | |
j3 | 1:91e52f8ab8bf | 331 | //********************************************************************* |
j3 | 1:91e52f8ab8bf | 332 | uint8_t Ds248x::OWReadBit() |
j3 | 1:91e52f8ab8bf | 333 | { |
j3 | 2:02d228c25fd4 | 334 | return(OWTouchBit(0x01)); |
j3 | 1:91e52f8ab8bf | 335 | } |
j3 | 1:91e52f8ab8bf | 336 | |
j3 | 1:91e52f8ab8bf | 337 | |
j3 | 1:91e52f8ab8bf | 338 | //********************************************************************* |
j3 | 1:91e52f8ab8bf | 339 | uint8_t Ds248x::OWTouchBit(uint8_t sendbit) |
j3 | 1:91e52f8ab8bf | 340 | { |
j3 | 1:91e52f8ab8bf | 341 | uint8_t rtn_val; |
j3 | 2:02d228c25fd4 | 342 | uint8_t poll_count = 0; |
j3 | 2:02d228c25fd4 | 343 | char status; |
j3 | 2:02d228c25fd4 | 344 | char packet[] = {CMD_1WSB, sendbit ? 0x80 : 0x00}; |
j3 | 2:02d228c25fd4 | 345 | |
j3 | 2:02d228c25fd4 | 346 | // 1-Wire bit (Case B) |
j3 | 2:02d228c25fd4 | 347 | // S AD,0 [A] 1WSB [A] BB [A] Sr AD,1 [A] [Status] A [Status] A\ P |
j3 | 2:02d228c25fd4 | 348 | // \--------/ |
j3 | 2:02d228c25fd4 | 349 | // Repeat until 1WB bit has changed to 0 |
j3 | 2:02d228c25fd4 | 350 | // [] indicates from slave |
j3 | 2:02d228c25fd4 | 351 | // BB indicates byte containing bit value in msbit |
j3 | 2:02d228c25fd4 | 352 | |
j3 | 2:02d228c25fd4 | 353 | _p_i2c_bus->write(_w_adrs, packet, 2); |
j3 | 2:02d228c25fd4 | 354 | |
j3 | 2:02d228c25fd4 | 355 | // loop checking 1WB bit for completion of 1-Wire operation |
j3 | 2:02d228c25fd4 | 356 | // abort if poll limit reached |
j3 | 2:02d228c25fd4 | 357 | do |
j3 | 2:02d228c25fd4 | 358 | { |
j3 | 2:02d228c25fd4 | 359 | _p_i2c_bus->read(_r_adrs, &status, 1); |
j3 | 2:02d228c25fd4 | 360 | } |
j3 | 2:02d228c25fd4 | 361 | while ((status & STATUS_1WB) && (poll_count++ < POLL_LIMIT)); |
j3 | 2:02d228c25fd4 | 362 | |
j3 | 2:02d228c25fd4 | 363 | // check for failure due to poll limit reached |
j3 | 2:02d228c25fd4 | 364 | if (poll_count >= POLL_LIMIT) |
j3 | 2:02d228c25fd4 | 365 | { |
j3 | 2:02d228c25fd4 | 366 | // handle error |
j3 | 2:02d228c25fd4 | 367 | // ... |
j3 | 2:02d228c25fd4 | 368 | reset(); |
j3 | 2:02d228c25fd4 | 369 | rtn_val = 0; |
j3 | 2:02d228c25fd4 | 370 | } |
j3 | 2:02d228c25fd4 | 371 | else |
j3 | 2:02d228c25fd4 | 372 | { |
j3 | 2:02d228c25fd4 | 373 | // return bit state |
j3 | 2:02d228c25fd4 | 374 | if (status & STATUS_SBR) |
j3 | 2:02d228c25fd4 | 375 | { |
j3 | 2:02d228c25fd4 | 376 | rtn_val = 1; |
j3 | 2:02d228c25fd4 | 377 | } |
j3 | 2:02d228c25fd4 | 378 | else |
j3 | 2:02d228c25fd4 | 379 | { |
j3 | 2:02d228c25fd4 | 380 | rtn_val = 0; |
j3 | 2:02d228c25fd4 | 381 | } |
j3 | 2:02d228c25fd4 | 382 | } |
j3 | 2:02d228c25fd4 | 383 | |
j3 | 2:02d228c25fd4 | 384 | return(rtn_val); |
j3 | 1:91e52f8ab8bf | 385 | } |
j3 | 1:91e52f8ab8bf | 386 | |
j3 | 1:91e52f8ab8bf | 387 | |
j3 | 1:91e52f8ab8bf | 388 | //********************************************************************* |
j3 | 2:02d228c25fd4 | 389 | bool Ds248x::OWWriteByte(uint8_t sendbyte) |
j3 | 1:91e52f8ab8bf | 390 | { |
j3 | 2:02d228c25fd4 | 391 | bool rtn_val = false; |
j3 | 1:91e52f8ab8bf | 392 | |
j3 | 2:02d228c25fd4 | 393 | uint8_t poll_count = 0; |
j3 | 2:02d228c25fd4 | 394 | char status; |
j3 | 2:02d228c25fd4 | 395 | char packet [] = {CMD_1WWB, sendbyte}; |
j3 | 2:02d228c25fd4 | 396 | |
j3 | 2:02d228c25fd4 | 397 | // 1-Wire Write Byte (Case B) |
j3 | 2:02d228c25fd4 | 398 | // S AD,0 [A] 1WWB [A] DD [A] Sr AD,1 [A] [Status] A [Status] A\ P |
j3 | 2:02d228c25fd4 | 399 | // \--------/ |
j3 | 2:02d228c25fd4 | 400 | // Repeat until 1WB bit has changed to 0 |
j3 | 2:02d228c25fd4 | 401 | // [] indicates from slave |
j3 | 2:02d228c25fd4 | 402 | // DD data to write |
j3 | 2:02d228c25fd4 | 403 | |
j3 | 2:02d228c25fd4 | 404 | _p_i2c_bus->write(_w_adrs, packet, 2); |
j3 | 2:02d228c25fd4 | 405 | |
j3 | 2:02d228c25fd4 | 406 | // loop checking 1WB bit for completion of 1-Wire operation |
j3 | 2:02d228c25fd4 | 407 | // abort if poll limit reached |
j3 | 2:02d228c25fd4 | 408 | do |
j3 | 2:02d228c25fd4 | 409 | { |
j3 | 2:02d228c25fd4 | 410 | _p_i2c_bus->read(_r_adrs, &status, 1); |
j3 | 2:02d228c25fd4 | 411 | } |
j3 | 2:02d228c25fd4 | 412 | while ((status & STATUS_1WB) && (poll_count++ < POLL_LIMIT)); |
j3 | 2:02d228c25fd4 | 413 | |
j3 | 2:02d228c25fd4 | 414 | // check for failure due to poll limit reached |
j3 | 2:02d228c25fd4 | 415 | if (poll_count >= POLL_LIMIT) |
j3 | 2:02d228c25fd4 | 416 | { |
j3 | 2:02d228c25fd4 | 417 | // handle error |
j3 | 2:02d228c25fd4 | 418 | // ... |
j3 | 2:02d228c25fd4 | 419 | reset(); |
j3 | 2:02d228c25fd4 | 420 | rtn_val = false; |
j3 | 2:02d228c25fd4 | 421 | } |
j3 | 2:02d228c25fd4 | 422 | else |
j3 | 2:02d228c25fd4 | 423 | { |
j3 | 2:02d228c25fd4 | 424 | rtn_val = true; |
j3 | 2:02d228c25fd4 | 425 | } |
j3 | 2:02d228c25fd4 | 426 | |
j3 | 2:02d228c25fd4 | 427 | return(rtn_val); |
j3 | 1:91e52f8ab8bf | 428 | } |
j3 | 1:91e52f8ab8bf | 429 | |
j3 | 1:91e52f8ab8bf | 430 | |
j3 | 1:91e52f8ab8bf | 431 | //********************************************************************* |
j3 | 1:91e52f8ab8bf | 432 | uint8_t Ds248x::OWReadByte(void) |
j3 | 1:91e52f8ab8bf | 433 | { |
j3 | 1:91e52f8ab8bf | 434 | uint8_t rtn_val; |
j3 | 2:02d228c25fd4 | 435 | |
j3 | 2:02d228c25fd4 | 436 | uint8_t poll_count = 0; |
j3 | 2:02d228c25fd4 | 437 | char data, status; |
j3 | 2:02d228c25fd4 | 438 | char packet[2] = {CMD_1WRB, 0}; |
j3 | 2:02d228c25fd4 | 439 | |
j3 | 2:02d228c25fd4 | 440 | // 1-Wire Read Bytes (Case C) |
j3 | 2:02d228c25fd4 | 441 | // S AD,0 [A] 1WRB [A] Sr AD,1 [A] [Status] A [Status] A\ |
j3 | 2:02d228c25fd4 | 442 | // \--------/ |
j3 | 2:02d228c25fd4 | 443 | // Repeat until 1WB bit has changed to 0 |
j3 | 2:02d228c25fd4 | 444 | // Sr AD,0 [A] SRP [A] E1 [A] Sr AD,1 [A] DD A\ P |
j3 | 2:02d228c25fd4 | 445 | // |
j3 | 2:02d228c25fd4 | 446 | // [] indicates from slave |
j3 | 2:02d228c25fd4 | 447 | // DD data read |
j3 | 2:02d228c25fd4 | 448 | |
j3 | 2:02d228c25fd4 | 449 | _p_i2c_bus->write(_w_adrs, packet, 1); |
j3 | 2:02d228c25fd4 | 450 | |
j3 | 2:02d228c25fd4 | 451 | // loop checking 1WB bit for completion of 1-Wire operation |
j3 | 2:02d228c25fd4 | 452 | // abort if poll limit reached |
j3 | 2:02d228c25fd4 | 453 | do |
j3 | 2:02d228c25fd4 | 454 | { |
j3 | 2:02d228c25fd4 | 455 | _p_i2c_bus->read(_r_adrs, &status, 1); |
j3 | 2:02d228c25fd4 | 456 | } |
j3 | 2:02d228c25fd4 | 457 | while ((status & STATUS_1WB) && (poll_count++ < POLL_LIMIT)); |
j3 | 2:02d228c25fd4 | 458 | |
j3 | 2:02d228c25fd4 | 459 | // check for failure due to poll limit reached |
j3 | 2:02d228c25fd4 | 460 | if (poll_count >= POLL_LIMIT) |
j3 | 2:02d228c25fd4 | 461 | { |
j3 | 2:02d228c25fd4 | 462 | // handle error |
j3 | 2:02d228c25fd4 | 463 | // ... |
j3 | 2:02d228c25fd4 | 464 | reset(); |
j3 | 2:02d228c25fd4 | 465 | rtn_val = 0; |
j3 | 2:02d228c25fd4 | 466 | } |
j3 | 2:02d228c25fd4 | 467 | else |
j3 | 2:02d228c25fd4 | 468 | { |
j3 | 2:02d228c25fd4 | 469 | packet[0] = CMD_SRP; |
j3 | 2:02d228c25fd4 | 470 | packet[1] = 0xE1; |
j3 | 2:02d228c25fd4 | 471 | |
j3 | 2:02d228c25fd4 | 472 | _p_i2c_bus->write(_w_adrs, packet, 2); |
j3 | 2:02d228c25fd4 | 473 | _p_i2c_bus->read(_r_adrs, &data, 1); |
j3 | 2:02d228c25fd4 | 474 | |
j3 | 2:02d228c25fd4 | 475 | rtn_val = data; |
j3 | 2:02d228c25fd4 | 476 | } |
j3 | 2:02d228c25fd4 | 477 | |
j3 | 1:91e52f8ab8bf | 478 | return(rtn_val); |
j3 | 1:91e52f8ab8bf | 479 | } |
j3 | 1:91e52f8ab8bf | 480 | |
j3 | 1:91e52f8ab8bf | 481 | |
j3 | 1:91e52f8ab8bf | 482 | //********************************************************************* |
j3 | 1:91e52f8ab8bf | 483 | uint8_t Ds248x::OWTouchByte(uint8_t sendbyte) |
j3 | 1:91e52f8ab8bf | 484 | { |
j3 | 1:91e52f8ab8bf | 485 | uint8_t rtn_val; |
j3 | 2:02d228c25fd4 | 486 | |
j3 | 2:02d228c25fd4 | 487 | if (sendbyte == 0xFF) |
j3 | 2:02d228c25fd4 | 488 | { |
j3 | 2:02d228c25fd4 | 489 | rtn_val = OWReadByte(); |
j3 | 2:02d228c25fd4 | 490 | } |
j3 | 2:02d228c25fd4 | 491 | else |
j3 | 2:02d228c25fd4 | 492 | { |
j3 | 2:02d228c25fd4 | 493 | OWWriteByte(sendbyte); |
j3 | 2:02d228c25fd4 | 494 | rtn_val = sendbyte; |
j3 | 2:02d228c25fd4 | 495 | } |
j3 | 2:02d228c25fd4 | 496 | |
j3 | 1:91e52f8ab8bf | 497 | return(rtn_val); |
j3 | 1:91e52f8ab8bf | 498 | } |
j3 | 1:91e52f8ab8bf | 499 | |
j3 | 1:91e52f8ab8bf | 500 | |
j3 | 1:91e52f8ab8bf | 501 | //********************************************************************* |
j3 | 1:91e52f8ab8bf | 502 | void Ds248x::OWBlock(uint8_t *tran_buf, uint8_t tran_len) |
j3 | 1:91e52f8ab8bf | 503 | { |
j3 | 2:02d228c25fd4 | 504 | uint8_t i; |
j3 | 2:02d228c25fd4 | 505 | |
j3 | 2:02d228c25fd4 | 506 | for (i = 0; i < tran_len; i++) |
j3 | 2:02d228c25fd4 | 507 | { |
j3 | 2:02d228c25fd4 | 508 | tran_buf[i] = OWTouchByte(tran_buf[i]); |
j3 | 2:02d228c25fd4 | 509 | } |
j3 | 1:91e52f8ab8bf | 510 | } |
j3 | 1:91e52f8ab8bf | 511 | |
j3 | 1:91e52f8ab8bf | 512 | |
j3 | 1:91e52f8ab8bf | 513 | //********************************************************************* |
j3 | 5:ce108eeb878d | 514 | void Ds248x::OWWriteBlock(const uint8_t *tran_buf, uint8_t tran_len) |
j3 | 5:ce108eeb878d | 515 | { |
j3 | 5:ce108eeb878d | 516 | uint8_t idx; |
j3 | 5:ce108eeb878d | 517 | |
j3 | 5:ce108eeb878d | 518 | for(idx = 0; idx < tran_len; idx++) |
j3 | 5:ce108eeb878d | 519 | { |
j3 | 5:ce108eeb878d | 520 | OWWriteByte(tran_buf[idx]); |
j3 | 5:ce108eeb878d | 521 | } |
j3 | 5:ce108eeb878d | 522 | } |
j3 | 5:ce108eeb878d | 523 | |
j3 | 5:ce108eeb878d | 524 | |
j3 | 5:ce108eeb878d | 525 | //********************************************************************* |
j3 | 5:ce108eeb878d | 526 | void Ds248x::OWReadBlock(uint8_t *recv_buf, uint8_t recv_len) |
j3 | 5:ce108eeb878d | 527 | { |
j3 | 5:ce108eeb878d | 528 | uint8_t idx; |
j3 | 5:ce108eeb878d | 529 | |
j3 | 5:ce108eeb878d | 530 | for(idx = 0; idx < recv_len; idx++) |
j3 | 5:ce108eeb878d | 531 | { |
j3 | 5:ce108eeb878d | 532 | recv_buf[idx] = OWReadByte(); |
j3 | 5:ce108eeb878d | 533 | } |
j3 | 5:ce108eeb878d | 534 | } |
j3 | 5:ce108eeb878d | 535 | |
j3 | 5:ce108eeb878d | 536 | |
j3 | 5:ce108eeb878d | 537 | //********************************************************************* |
j3 | 2:02d228c25fd4 | 538 | bool Ds248x::OWFirst(void) |
j3 | 1:91e52f8ab8bf | 539 | { |
j3 | 2:02d228c25fd4 | 540 | // reset the search state |
j3 | 2:02d228c25fd4 | 541 | _last_discrepancy = 0; |
j3 | 5:ce108eeb878d | 542 | _last_device_flag = false; |
j3 | 2:02d228c25fd4 | 543 | _last_family_discrepancy = 0; |
j3 | 2:02d228c25fd4 | 544 | |
j3 | 2:02d228c25fd4 | 545 | return OWSearch(); |
j3 | 2:02d228c25fd4 | 546 | } |
j3 | 2:02d228c25fd4 | 547 | |
j3 | 2:02d228c25fd4 | 548 | |
j3 | 2:02d228c25fd4 | 549 | //********************************************************************* |
j3 | 2:02d228c25fd4 | 550 | bool Ds248x::OWNext(void) |
j3 | 2:02d228c25fd4 | 551 | { |
j3 | 2:02d228c25fd4 | 552 | // leave the search state alone |
j3 | 2:02d228c25fd4 | 553 | return OWSearch(); |
j3 | 1:91e52f8ab8bf | 554 | } |
j3 | 1:91e52f8ab8bf | 555 | |
j3 | 1:91e52f8ab8bf | 556 | |
j3 | 1:91e52f8ab8bf | 557 | //********************************************************************* |
j3 | 2:02d228c25fd4 | 558 | bool Ds248x::OWVerify(void) |
j3 | 1:91e52f8ab8bf | 559 | { |
j3 | 2:02d228c25fd4 | 560 | bool rtn_val = false; |
j3 | 2:02d228c25fd4 | 561 | |
j3 | 2:02d228c25fd4 | 562 | uint8_t rom_backup[8]; |
j3 | 2:02d228c25fd4 | 563 | uint8_t i,rslt,ld_backup,ldf_backup,lfd_backup; |
j3 | 2:02d228c25fd4 | 564 | |
j3 | 2:02d228c25fd4 | 565 | // keep a backup copy of the current state |
j3 | 2:02d228c25fd4 | 566 | for (i = 0; i < 8; i++) |
j3 | 2:02d228c25fd4 | 567 | { |
j3 | 2:02d228c25fd4 | 568 | rom_backup[i] = _rom_number[i]; |
j3 | 2:02d228c25fd4 | 569 | } |
j3 | 2:02d228c25fd4 | 570 | |
j3 | 2:02d228c25fd4 | 571 | ld_backup = _last_discrepancy; |
j3 | 2:02d228c25fd4 | 572 | ldf_backup = _last_device_flag; |
j3 | 2:02d228c25fd4 | 573 | lfd_backup = _last_family_discrepancy; |
j3 | 2:02d228c25fd4 | 574 | |
j3 | 2:02d228c25fd4 | 575 | // set search to find the same device |
j3 | 2:02d228c25fd4 | 576 | _last_discrepancy = 64; |
j3 | 5:ce108eeb878d | 577 | _last_device_flag = false; |
j3 | 1:91e52f8ab8bf | 578 | |
j3 | 2:02d228c25fd4 | 579 | if (OWSearch()) |
j3 | 2:02d228c25fd4 | 580 | { |
j3 | 2:02d228c25fd4 | 581 | // check if same device found |
j3 | 5:ce108eeb878d | 582 | rslt = true; |
j3 | 2:02d228c25fd4 | 583 | for (i = 0; i < 8; i++) |
j3 | 2:02d228c25fd4 | 584 | { |
j3 | 2:02d228c25fd4 | 585 | if (rom_backup[i] != _rom_number[i]) |
j3 | 2:02d228c25fd4 | 586 | { |
j3 | 5:ce108eeb878d | 587 | rslt = false; |
j3 | 2:02d228c25fd4 | 588 | break; |
j3 | 2:02d228c25fd4 | 589 | } |
j3 | 2:02d228c25fd4 | 590 | } |
j3 | 2:02d228c25fd4 | 591 | } |
j3 | 2:02d228c25fd4 | 592 | else |
j3 | 2:02d228c25fd4 | 593 | { |
j3 | 5:ce108eeb878d | 594 | rslt = false; |
j3 | 2:02d228c25fd4 | 595 | } |
j3 | 1:91e52f8ab8bf | 596 | |
j3 | 2:02d228c25fd4 | 597 | // restore the search state |
j3 | 2:02d228c25fd4 | 598 | for (i = 0; i < 8; i++) |
j3 | 2:02d228c25fd4 | 599 | { |
j3 | 2:02d228c25fd4 | 600 | _rom_number[i] = rom_backup[i]; |
j3 | 2:02d228c25fd4 | 601 | } |
j3 | 2:02d228c25fd4 | 602 | |
j3 | 2:02d228c25fd4 | 603 | _last_discrepancy = ld_backup; |
j3 | 2:02d228c25fd4 | 604 | _last_device_flag = ldf_backup; |
j3 | 2:02d228c25fd4 | 605 | _last_family_discrepancy = lfd_backup; |
j3 | 2:02d228c25fd4 | 606 | |
j3 | 2:02d228c25fd4 | 607 | // return the result of the verify |
j3 | 2:02d228c25fd4 | 608 | rtn_val = rslt; |
j3 | 2:02d228c25fd4 | 609 | |
j3 | 1:91e52f8ab8bf | 610 | return(rtn_val); |
j3 | 1:91e52f8ab8bf | 611 | } |
j3 | 1:91e52f8ab8bf | 612 | |
j3 | 1:91e52f8ab8bf | 613 | |
j3 | 1:91e52f8ab8bf | 614 | //********************************************************************* |
j3 | 1:91e52f8ab8bf | 615 | void Ds248x::OWTargetSetup(uint8_t family_code) |
j3 | 1:91e52f8ab8bf | 616 | { |
j3 | 2:02d228c25fd4 | 617 | uint8_t i; |
j3 | 2:02d228c25fd4 | 618 | |
j3 | 2:02d228c25fd4 | 619 | // set the search state to find SearchFamily type devices |
j3 | 2:02d228c25fd4 | 620 | _rom_number[0] = family_code; |
j3 | 2:02d228c25fd4 | 621 | for (i = 1; i < 8; i++) |
j3 | 2:02d228c25fd4 | 622 | { |
j3 | 2:02d228c25fd4 | 623 | _rom_number[i] = 0; |
j3 | 2:02d228c25fd4 | 624 | } |
j3 | 1:91e52f8ab8bf | 625 | |
j3 | 2:02d228c25fd4 | 626 | _last_discrepancy = 64; |
j3 | 2:02d228c25fd4 | 627 | _last_family_discrepancy = 0; |
j3 | 5:ce108eeb878d | 628 | _last_device_flag = false; |
j3 | 1:91e52f8ab8bf | 629 | } |
j3 | 1:91e52f8ab8bf | 630 | |
j3 | 1:91e52f8ab8bf | 631 | |
j3 | 1:91e52f8ab8bf | 632 | //********************************************************************* |
j3 | 1:91e52f8ab8bf | 633 | void Ds248x::OWFamilySkipSetup(void) |
j3 | 1:91e52f8ab8bf | 634 | { |
j3 | 2:02d228c25fd4 | 635 | // set the Last discrepancy to last family discrepancy |
j3 | 2:02d228c25fd4 | 636 | _last_discrepancy = _last_family_discrepancy; |
j3 | 1:91e52f8ab8bf | 637 | |
j3 | 2:02d228c25fd4 | 638 | // clear the last family discrpepancy |
j3 | 2:02d228c25fd4 | 639 | _last_family_discrepancy = 0; |
j3 | 2:02d228c25fd4 | 640 | |
j3 | 2:02d228c25fd4 | 641 | // check for end of list |
j3 | 2:02d228c25fd4 | 642 | if (_last_discrepancy == 0) |
j3 | 2:02d228c25fd4 | 643 | { |
j3 | 5:ce108eeb878d | 644 | _last_device_flag = true; |
j3 | 2:02d228c25fd4 | 645 | } |
j3 | 1:91e52f8ab8bf | 646 | } |
j3 | 1:91e52f8ab8bf | 647 | |
j3 | 1:91e52f8ab8bf | 648 | |
j3 | 1:91e52f8ab8bf | 649 | //********************************************************************* |
j3 | 2:02d228c25fd4 | 650 | bool Ds248x::OWSearch(void) |
j3 | 1:91e52f8ab8bf | 651 | { |
j3 | 2:02d228c25fd4 | 652 | uint8_t id_bit_number; |
j3 | 2:02d228c25fd4 | 653 | uint8_t last_zero, rom_byte_number, search_result; |
j3 | 2:02d228c25fd4 | 654 | uint8_t id_bit, cmp_id_bit; |
j3 | 2:02d228c25fd4 | 655 | uint8_t rom_byte_mask, search_direction, status; |
j3 | 2:02d228c25fd4 | 656 | |
j3 | 2:02d228c25fd4 | 657 | // initialize for search |
j3 | 2:02d228c25fd4 | 658 | id_bit_number = 1; |
j3 | 2:02d228c25fd4 | 659 | last_zero = 0; |
j3 | 2:02d228c25fd4 | 660 | rom_byte_number = 0; |
j3 | 2:02d228c25fd4 | 661 | rom_byte_mask = 1; |
j3 | 5:ce108eeb878d | 662 | search_result = false; |
j3 | 2:02d228c25fd4 | 663 | _crc8 = 0; |
j3 | 2:02d228c25fd4 | 664 | |
j3 | 2:02d228c25fd4 | 665 | // if the last call was not the last one |
j3 | 2:02d228c25fd4 | 666 | if (!_last_device_flag) |
j3 | 2:02d228c25fd4 | 667 | { |
j3 | 2:02d228c25fd4 | 668 | // 1-Wire reset |
j3 | 2:02d228c25fd4 | 669 | if (!OWReset()) |
j3 | 2:02d228c25fd4 | 670 | { |
j3 | 2:02d228c25fd4 | 671 | // reset the search |
j3 | 2:02d228c25fd4 | 672 | _last_discrepancy = 0; |
j3 | 5:ce108eeb878d | 673 | _last_device_flag = false; |
j3 | 2:02d228c25fd4 | 674 | _last_family_discrepancy = 0; |
j3 | 5:ce108eeb878d | 675 | return false; |
j3 | 2:02d228c25fd4 | 676 | } |
j3 | 2:02d228c25fd4 | 677 | |
j3 | 2:02d228c25fd4 | 678 | // issue the search command |
j3 | 2:02d228c25fd4 | 679 | OWWriteByte(SEARCH_ROM); |
j3 | 2:02d228c25fd4 | 680 | |
j3 | 2:02d228c25fd4 | 681 | // loop to do the search |
j3 | 2:02d228c25fd4 | 682 | do |
j3 | 2:02d228c25fd4 | 683 | { |
j3 | 2:02d228c25fd4 | 684 | // if this discrepancy if before the Last Discrepancy |
j3 | 2:02d228c25fd4 | 685 | // on a previous next then pick the same as last time |
j3 | 2:02d228c25fd4 | 686 | if (id_bit_number < _last_discrepancy) |
j3 | 2:02d228c25fd4 | 687 | { |
j3 | 2:02d228c25fd4 | 688 | if ((_rom_number[rom_byte_number] & rom_byte_mask) > 0) |
j3 | 2:02d228c25fd4 | 689 | search_direction = 1; |
j3 | 2:02d228c25fd4 | 690 | else |
j3 | 2:02d228c25fd4 | 691 | search_direction = 0; |
j3 | 2:02d228c25fd4 | 692 | } |
j3 | 2:02d228c25fd4 | 693 | else |
j3 | 2:02d228c25fd4 | 694 | { |
j3 | 2:02d228c25fd4 | 695 | // if equal to last pick 1, if not then pick 0 |
j3 | 2:02d228c25fd4 | 696 | if (id_bit_number == _last_discrepancy) |
j3 | 2:02d228c25fd4 | 697 | search_direction = 1; |
j3 | 2:02d228c25fd4 | 698 | else |
j3 | 2:02d228c25fd4 | 699 | search_direction = 0; |
j3 | 2:02d228c25fd4 | 700 | } |
j3 | 2:02d228c25fd4 | 701 | |
j3 | 2:02d228c25fd4 | 702 | // Perform a triple operation on the ds2484 which will perform 2 read bits and 1 write bit |
j3 | 2:02d228c25fd4 | 703 | status = search_triplet(search_direction); |
j3 | 2:02d228c25fd4 | 704 | |
j3 | 2:02d228c25fd4 | 705 | // check bit results in status byte |
j3 | 2:02d228c25fd4 | 706 | id_bit = ((status & STATUS_SBR) == STATUS_SBR); |
j3 | 2:02d228c25fd4 | 707 | cmp_id_bit = ((status & STATUS_TSB) == STATUS_TSB); |
j3 | 2:02d228c25fd4 | 708 | search_direction = ((status & STATUS_DIR) == STATUS_DIR) ? (unsigned char)1 : (unsigned char)0; |
j3 | 2:02d228c25fd4 | 709 | |
j3 | 2:02d228c25fd4 | 710 | // check for no devices on 1-Wire |
j3 | 2:02d228c25fd4 | 711 | if ((id_bit) && (cmp_id_bit)) |
j3 | 2:02d228c25fd4 | 712 | break; |
j3 | 2:02d228c25fd4 | 713 | else |
j3 | 2:02d228c25fd4 | 714 | { |
j3 | 2:02d228c25fd4 | 715 | if ((!id_bit) && (!cmp_id_bit) && (search_direction == 0)) |
j3 | 2:02d228c25fd4 | 716 | { |
j3 | 2:02d228c25fd4 | 717 | last_zero = id_bit_number; |
j3 | 2:02d228c25fd4 | 718 | |
j3 | 2:02d228c25fd4 | 719 | // check for Last discrepancy in family |
j3 | 2:02d228c25fd4 | 720 | if (last_zero < 9) |
j3 | 2:02d228c25fd4 | 721 | _last_family_discrepancy = last_zero; |
j3 | 2:02d228c25fd4 | 722 | } |
j3 | 2:02d228c25fd4 | 723 | |
j3 | 2:02d228c25fd4 | 724 | // set or clear the bit in the ROM byte rom_byte_number |
j3 | 2:02d228c25fd4 | 725 | // with mask rom_byte_mask |
j3 | 2:02d228c25fd4 | 726 | if (search_direction == 1) |
j3 | 2:02d228c25fd4 | 727 | _rom_number[rom_byte_number] |= rom_byte_mask; |
j3 | 2:02d228c25fd4 | 728 | else |
j3 | 2:02d228c25fd4 | 729 | _rom_number[rom_byte_number] &= (unsigned char)~rom_byte_mask; |
j3 | 2:02d228c25fd4 | 730 | |
j3 | 2:02d228c25fd4 | 731 | // increment the byte counter id_bit_number |
j3 | 2:02d228c25fd4 | 732 | // and shift the mask rom_byte_mask |
j3 | 2:02d228c25fd4 | 733 | id_bit_number++; |
j3 | 2:02d228c25fd4 | 734 | rom_byte_mask <<= 1; |
j3 | 2:02d228c25fd4 | 735 | |
j3 | 2:02d228c25fd4 | 736 | // if the mask is 0 then go to new SerialNum byte rom_byte_number and reset mask |
j3 | 2:02d228c25fd4 | 737 | if (rom_byte_mask == 0) |
j3 | 2:02d228c25fd4 | 738 | { |
j3 | 5:ce108eeb878d | 739 | _crc8 = OWCalc_crc8(_rom_number[rom_byte_number], _crc8); // accumulate the CRC |
j3 | 2:02d228c25fd4 | 740 | rom_byte_number++; |
j3 | 2:02d228c25fd4 | 741 | rom_byte_mask = 1; |
j3 | 2:02d228c25fd4 | 742 | } |
j3 | 2:02d228c25fd4 | 743 | } |
j3 | 2:02d228c25fd4 | 744 | } |
j3 | 2:02d228c25fd4 | 745 | while(rom_byte_number < 8); // loop until through all ROM bytes 0-7 |
j3 | 2:02d228c25fd4 | 746 | |
j3 | 2:02d228c25fd4 | 747 | // if the search was successful then |
j3 | 2:02d228c25fd4 | 748 | if (!((id_bit_number < 65) || (_crc8 != 0))) |
j3 | 2:02d228c25fd4 | 749 | { |
j3 | 2:02d228c25fd4 | 750 | // search successful so set LastDiscrepancy,LastDeviceFlag,search_result |
j3 | 2:02d228c25fd4 | 751 | _last_discrepancy = last_zero; |
j3 | 2:02d228c25fd4 | 752 | |
j3 | 2:02d228c25fd4 | 753 | // check for last device |
j3 | 2:02d228c25fd4 | 754 | if (_last_discrepancy == 0) |
j3 | 5:ce108eeb878d | 755 | _last_device_flag = true; |
j3 | 2:02d228c25fd4 | 756 | |
j3 | 5:ce108eeb878d | 757 | search_result = true; |
j3 | 2:02d228c25fd4 | 758 | } |
j3 | 2:02d228c25fd4 | 759 | } |
j3 | 2:02d228c25fd4 | 760 | |
j3 | 2:02d228c25fd4 | 761 | // if no device found then reset counters so next 'search' will be like a first |
j3 | 2:02d228c25fd4 | 762 | if (!search_result || (_rom_number[0] == 0)) |
j3 | 2:02d228c25fd4 | 763 | { |
j3 | 2:02d228c25fd4 | 764 | _last_discrepancy = 0; |
j3 | 5:ce108eeb878d | 765 | _last_device_flag = false; |
j3 | 2:02d228c25fd4 | 766 | _last_family_discrepancy = 0; |
j3 | 5:ce108eeb878d | 767 | search_result = false; |
j3 | 2:02d228c25fd4 | 768 | } |
j3 | 2:02d228c25fd4 | 769 | |
j3 | 2:02d228c25fd4 | 770 | return search_result; |
j3 | 1:91e52f8ab8bf | 771 | } |
j3 | 1:91e52f8ab8bf | 772 | |
j3 | 1:91e52f8ab8bf | 773 | |
j3 | 1:91e52f8ab8bf | 774 | //********************************************************************* |
j3 | 5:ce108eeb878d | 775 | bool Ds248x::OWReadROM(void) |
j3 | 5:ce108eeb878d | 776 | { |
j3 | 5:ce108eeb878d | 777 | bool rtn_val = false; |
j3 | 5:ce108eeb878d | 778 | |
j3 | 5:ce108eeb878d | 779 | if(!OWReset()) |
j3 | 5:ce108eeb878d | 780 | { |
j3 | 5:ce108eeb878d | 781 | rtn_val = false; |
j3 | 5:ce108eeb878d | 782 | } |
j3 | 5:ce108eeb878d | 783 | else |
j3 | 5:ce108eeb878d | 784 | { |
j3 | 5:ce108eeb878d | 785 | if(!OWWriteByte(READ_ROM)) |
j3 | 5:ce108eeb878d | 786 | { |
j3 | 5:ce108eeb878d | 787 | rtn_val = false; |
j3 | 5:ce108eeb878d | 788 | } |
j3 | 5:ce108eeb878d | 789 | else |
j3 | 5:ce108eeb878d | 790 | { |
j3 | 5:ce108eeb878d | 791 | OWReadBlock(_rom_number, ROMnumberLen); |
j3 | 5:ce108eeb878d | 792 | rtn_val = true; |
j3 | 5:ce108eeb878d | 793 | } |
j3 | 5:ce108eeb878d | 794 | } |
j3 | 5:ce108eeb878d | 795 | |
j3 | 5:ce108eeb878d | 796 | return rtn_val; |
j3 | 5:ce108eeb878d | 797 | } |
j3 | 5:ce108eeb878d | 798 | |
j3 | 5:ce108eeb878d | 799 | |
j3 | 5:ce108eeb878d | 800 | //********************************************************************* |
j3 | 5:ce108eeb878d | 801 | bool Ds248x::OWSkipROM(void) |
j3 | 5:ce108eeb878d | 802 | { |
j3 | 5:ce108eeb878d | 803 | bool rtn_val = false; |
j3 | 5:ce108eeb878d | 804 | |
j3 | 5:ce108eeb878d | 805 | if(!OWReset()) |
j3 | 5:ce108eeb878d | 806 | { |
j3 | 5:ce108eeb878d | 807 | rtn_val = false; |
j3 | 5:ce108eeb878d | 808 | } |
j3 | 5:ce108eeb878d | 809 | else |
j3 | 5:ce108eeb878d | 810 | { |
j3 | 5:ce108eeb878d | 811 | if(!OWWriteByte(SKIP_ROM)) |
j3 | 5:ce108eeb878d | 812 | { |
j3 | 5:ce108eeb878d | 813 | rtn_val = false; |
j3 | 5:ce108eeb878d | 814 | } |
j3 | 5:ce108eeb878d | 815 | else |
j3 | 5:ce108eeb878d | 816 | { |
j3 | 5:ce108eeb878d | 817 | rtn_val = true; |
j3 | 5:ce108eeb878d | 818 | } |
j3 | 5:ce108eeb878d | 819 | } |
j3 | 5:ce108eeb878d | 820 | |
j3 | 5:ce108eeb878d | 821 | return rtn_val; |
j3 | 5:ce108eeb878d | 822 | } |
j3 | 5:ce108eeb878d | 823 | |
j3 | 5:ce108eeb878d | 824 | |
j3 | 5:ce108eeb878d | 825 | //********************************************************************* |
j3 | 5:ce108eeb878d | 826 | bool Ds248x::OWMatchROM(void) |
j3 | 5:ce108eeb878d | 827 | { |
j3 | 5:ce108eeb878d | 828 | bool rtn_val = false; |
j3 | 5:ce108eeb878d | 829 | uint8_t idx; |
j3 | 5:ce108eeb878d | 830 | |
j3 | 5:ce108eeb878d | 831 | if(!OWReset()) |
j3 | 5:ce108eeb878d | 832 | { |
j3 | 5:ce108eeb878d | 833 | rtn_val = false; |
j3 | 5:ce108eeb878d | 834 | } |
j3 | 5:ce108eeb878d | 835 | else |
j3 | 5:ce108eeb878d | 836 | { |
j3 | 5:ce108eeb878d | 837 | if(!OWWriteByte(MATCH_ROM)) |
j3 | 5:ce108eeb878d | 838 | { |
j3 | 5:ce108eeb878d | 839 | rtn_val = false; |
j3 | 5:ce108eeb878d | 840 | } |
j3 | 5:ce108eeb878d | 841 | else |
j3 | 5:ce108eeb878d | 842 | { |
j3 | 5:ce108eeb878d | 843 | for(idx = 0; idx < ROMnumberLen; idx++) |
j3 | 5:ce108eeb878d | 844 | { |
j3 | 5:ce108eeb878d | 845 | OWWriteByte(_rom_number[idx]); |
j3 | 5:ce108eeb878d | 846 | } |
j3 | 5:ce108eeb878d | 847 | rtn_val = true; |
j3 | 5:ce108eeb878d | 848 | } |
j3 | 5:ce108eeb878d | 849 | } |
j3 | 5:ce108eeb878d | 850 | |
j3 | 5:ce108eeb878d | 851 | return rtn_val; |
j3 | 5:ce108eeb878d | 852 | } |
j3 | 5:ce108eeb878d | 853 | |
j3 | 5:ce108eeb878d | 854 | |
j3 | 5:ce108eeb878d | 855 | //********************************************************************* |
j3 | 5:ce108eeb878d | 856 | bool Ds248x::OWOverdriveSkipROM(void) |
j3 | 5:ce108eeb878d | 857 | { |
j3 | 5:ce108eeb878d | 858 | bool rtn_val = false; |
j3 | 5:ce108eeb878d | 859 | |
j3 | 5:ce108eeb878d | 860 | if(!OWReset()) |
j3 | 5:ce108eeb878d | 861 | { |
j3 | 5:ce108eeb878d | 862 | rtn_val = false; |
j3 | 5:ce108eeb878d | 863 | } |
j3 | 5:ce108eeb878d | 864 | else |
j3 | 5:ce108eeb878d | 865 | { |
j3 | 5:ce108eeb878d | 866 | if(!OWWriteByte(OVERDRIVE_SKIP)) |
j3 | 5:ce108eeb878d | 867 | { |
j3 | 5:ce108eeb878d | 868 | rtn_val = false; |
j3 | 5:ce108eeb878d | 869 | } |
j3 | 5:ce108eeb878d | 870 | else |
j3 | 5:ce108eeb878d | 871 | { |
j3 | 5:ce108eeb878d | 872 | //change speed for subsequent comands |
j3 | 5:ce108eeb878d | 873 | OWSpeed(SPEED_OVERDRIVE); |
j3 | 5:ce108eeb878d | 874 | rtn_val = true; |
j3 | 5:ce108eeb878d | 875 | } |
j3 | 5:ce108eeb878d | 876 | } |
j3 | 5:ce108eeb878d | 877 | |
j3 | 5:ce108eeb878d | 878 | return rtn_val; |
j3 | 5:ce108eeb878d | 879 | } |
j3 | 5:ce108eeb878d | 880 | |
j3 | 5:ce108eeb878d | 881 | |
j3 | 5:ce108eeb878d | 882 | //********************************************************************* |
j3 | 5:ce108eeb878d | 883 | bool Ds248x::OWOverdriveMatchROM(void) |
j3 | 5:ce108eeb878d | 884 | { |
j3 | 5:ce108eeb878d | 885 | bool rtn_val = false; |
j3 | 5:ce108eeb878d | 886 | uint8_t idx; |
j3 | 5:ce108eeb878d | 887 | |
j3 | 5:ce108eeb878d | 888 | if(!OWReset()) |
j3 | 5:ce108eeb878d | 889 | { |
j3 | 5:ce108eeb878d | 890 | rtn_val = false; |
j3 | 5:ce108eeb878d | 891 | } |
j3 | 5:ce108eeb878d | 892 | else |
j3 | 5:ce108eeb878d | 893 | { |
j3 | 5:ce108eeb878d | 894 | if(!OWWriteByte(OVERDRIVE_MATCH)) |
j3 | 5:ce108eeb878d | 895 | { |
j3 | 5:ce108eeb878d | 896 | rtn_val = false; |
j3 | 5:ce108eeb878d | 897 | } |
j3 | 5:ce108eeb878d | 898 | else |
j3 | 5:ce108eeb878d | 899 | { |
j3 | 5:ce108eeb878d | 900 | //change speed before sending ROM number |
j3 | 5:ce108eeb878d | 901 | OWSpeed(SPEED_OVERDRIVE); |
j3 | 5:ce108eeb878d | 902 | |
j3 | 5:ce108eeb878d | 903 | for(idx = 0; idx < ROMnumberLen; idx++) |
j3 | 5:ce108eeb878d | 904 | { |
j3 | 5:ce108eeb878d | 905 | OWWriteByte(_rom_number[idx]); |
j3 | 5:ce108eeb878d | 906 | } |
j3 | 5:ce108eeb878d | 907 | rtn_val = true; |
j3 | 5:ce108eeb878d | 908 | } |
j3 | 5:ce108eeb878d | 909 | } |
j3 | 5:ce108eeb878d | 910 | |
j3 | 5:ce108eeb878d | 911 | return rtn_val; |
j3 | 5:ce108eeb878d | 912 | } |
j3 | 5:ce108eeb878d | 913 | |
j3 | 5:ce108eeb878d | 914 | |
j3 | 5:ce108eeb878d | 915 | //********************************************************************* |
j3 | 5:ce108eeb878d | 916 | bool Ds248x::OWResume(void) |
j3 | 5:ce108eeb878d | 917 | { |
j3 | 5:ce108eeb878d | 918 | bool rtn_val = false; |
j3 | 5:ce108eeb878d | 919 | |
j3 | 5:ce108eeb878d | 920 | if(!OWReset()) |
j3 | 5:ce108eeb878d | 921 | { |
j3 | 5:ce108eeb878d | 922 | rtn_val = false; |
j3 | 5:ce108eeb878d | 923 | } |
j3 | 5:ce108eeb878d | 924 | else |
j3 | 5:ce108eeb878d | 925 | { |
j3 | 5:ce108eeb878d | 926 | if(!OWWriteByte(RESUME)) |
j3 | 5:ce108eeb878d | 927 | { |
j3 | 5:ce108eeb878d | 928 | rtn_val = false; |
j3 | 5:ce108eeb878d | 929 | } |
j3 | 5:ce108eeb878d | 930 | else |
j3 | 5:ce108eeb878d | 931 | { |
j3 | 5:ce108eeb878d | 932 | rtn_val = true; |
j3 | 5:ce108eeb878d | 933 | } |
j3 | 5:ce108eeb878d | 934 | } |
j3 | 5:ce108eeb878d | 935 | |
j3 | 5:ce108eeb878d | 936 | return rtn_val; |
j3 | 5:ce108eeb878d | 937 | } |
j3 | 5:ce108eeb878d | 938 | |
j3 | 5:ce108eeb878d | 939 | |
j3 | 5:ce108eeb878d | 940 | //********************************************************************* |
j3 | 5:ce108eeb878d | 941 | uint8_t Ds248x::OWSpeed(OW_SPEED new_speed) |
j3 | 1:91e52f8ab8bf | 942 | { |
j3 | 2:02d228c25fd4 | 943 | // set the speed |
j3 | 5:ce108eeb878d | 944 | if (new_speed == SPEED_OVERDRIVE) |
j3 | 2:02d228c25fd4 | 945 | { |
j3 | 2:02d228c25fd4 | 946 | _c1WS = CONFIG_1WS; |
j3 | 2:02d228c25fd4 | 947 | } |
j3 | 2:02d228c25fd4 | 948 | else |
j3 | 2:02d228c25fd4 | 949 | { |
j3 | 5:ce108eeb878d | 950 | _c1WS = false; |
j3 | 2:02d228c25fd4 | 951 | } |
j3 | 2:02d228c25fd4 | 952 | |
j3 | 2:02d228c25fd4 | 953 | // write the new config |
j3 | 2:02d228c25fd4 | 954 | write_config(_c1WS | _cSPU | _cPDN | _cAPU); |
j3 | 2:02d228c25fd4 | 955 | |
j3 | 2:02d228c25fd4 | 956 | return(new_speed); |
j3 | 1:91e52f8ab8bf | 957 | } |
j3 | 1:91e52f8ab8bf | 958 | |
j3 | 1:91e52f8ab8bf | 959 | |
j3 | 1:91e52f8ab8bf | 960 | //********************************************************************* |
j3 | 5:ce108eeb878d | 961 | uint8_t Ds248x::OWLevel(OW_LEVEL new_level) |
j3 | 1:91e52f8ab8bf | 962 | { |
j3 | 1:91e52f8ab8bf | 963 | uint8_t rtn_val; |
j3 | 2:02d228c25fd4 | 964 | |
j3 | 2:02d228c25fd4 | 965 | // function only will turn back to non-strong pull-up |
j3 | 5:ce108eeb878d | 966 | if (new_level != LEVEL_NORMAL) |
j3 | 2:02d228c25fd4 | 967 | { |
j3 | 5:ce108eeb878d | 968 | rtn_val = LEVEL_STRONG; |
j3 | 2:02d228c25fd4 | 969 | } |
j3 | 2:02d228c25fd4 | 970 | else |
j3 | 2:02d228c25fd4 | 971 | { |
j3 | 2:02d228c25fd4 | 972 | // clear the strong pull-up bit in the global config state |
j3 | 5:ce108eeb878d | 973 | _cSPU = false; |
j3 | 2:02d228c25fd4 | 974 | // write the new config |
j3 | 2:02d228c25fd4 | 975 | write_config(_c1WS | _cSPU | _cPDN | _cAPU); |
j3 | 5:ce108eeb878d | 976 | rtn_val = LEVEL_NORMAL; |
j3 | 2:02d228c25fd4 | 977 | } |
j3 | 2:02d228c25fd4 | 978 | |
j3 | 1:91e52f8ab8bf | 979 | return(rtn_val); |
j3 | 1:91e52f8ab8bf | 980 | } |
j3 | 1:91e52f8ab8bf | 981 | |
j3 | 1:91e52f8ab8bf | 982 | |
j3 | 1:91e52f8ab8bf | 983 | //********************************************************************* |
j3 | 2:02d228c25fd4 | 984 | bool Ds248x::OWWriteBytePower(uint8_t sendbyte) |
j3 | 1:91e52f8ab8bf | 985 | { |
j3 | 2:02d228c25fd4 | 986 | bool rtn_val = false; |
j3 | 2:02d228c25fd4 | 987 | |
j3 | 2:02d228c25fd4 | 988 | // set strong pull-up enable |
j3 | 2:02d228c25fd4 | 989 | _cSPU = CONFIG_SPU; |
j3 | 2:02d228c25fd4 | 990 | |
j3 | 2:02d228c25fd4 | 991 | // write the new config |
j3 | 2:02d228c25fd4 | 992 | if (!write_config(_c1WS | _cSPU | _cPDN | _cAPU)) |
j3 | 2:02d228c25fd4 | 993 | { |
j3 | 2:02d228c25fd4 | 994 | rtn_val = false; |
j3 | 2:02d228c25fd4 | 995 | } |
j3 | 2:02d228c25fd4 | 996 | else |
j3 | 2:02d228c25fd4 | 997 | { |
j3 | 2:02d228c25fd4 | 998 | // perform write byte |
j3 | 2:02d228c25fd4 | 999 | OWWriteByte(sendbyte); |
j3 | 2:02d228c25fd4 | 1000 | rtn_val = true; |
j3 | 2:02d228c25fd4 | 1001 | } |
j3 | 2:02d228c25fd4 | 1002 | |
j3 | 1:91e52f8ab8bf | 1003 | return(rtn_val); |
j3 | 1:91e52f8ab8bf | 1004 | } |
j3 | 1:91e52f8ab8bf | 1005 | |
j3 | 1:91e52f8ab8bf | 1006 | |
j3 | 1:91e52f8ab8bf | 1007 | //********************************************************************* |
j3 | 2:02d228c25fd4 | 1008 | bool Ds248x::OWReadBitPower(uint8_t applyPowerResponse) |
j3 | 1:91e52f8ab8bf | 1009 | { |
j3 | 2:02d228c25fd4 | 1010 | bool rtn_val = false; |
j3 | 2:02d228c25fd4 | 1011 | |
j3 | 2:02d228c25fd4 | 1012 | uint8_t rdbit; |
j3 | 2:02d228c25fd4 | 1013 | |
j3 | 2:02d228c25fd4 | 1014 | // set strong pull-up enable |
j3 | 2:02d228c25fd4 | 1015 | _cSPU = CONFIG_SPU; |
j3 | 2:02d228c25fd4 | 1016 | |
j3 | 2:02d228c25fd4 | 1017 | // write the new config |
j3 | 2:02d228c25fd4 | 1018 | if (!write_config(_c1WS | _cSPU | _cPDN | _cAPU)) |
j3 | 2:02d228c25fd4 | 1019 | { |
j3 | 2:02d228c25fd4 | 1020 | rtn_val = false; |
j3 | 2:02d228c25fd4 | 1021 | } |
j3 | 2:02d228c25fd4 | 1022 | else |
j3 | 2:02d228c25fd4 | 1023 | { |
j3 | 2:02d228c25fd4 | 1024 | // perform read bit |
j3 | 2:02d228c25fd4 | 1025 | rdbit = OWReadBit(); |
j3 | 2:02d228c25fd4 | 1026 | |
j3 | 2:02d228c25fd4 | 1027 | // check if response was correct, if not then turn off strong pull-up |
j3 | 2:02d228c25fd4 | 1028 | if (rdbit != applyPowerResponse) |
j3 | 2:02d228c25fd4 | 1029 | { |
j3 | 5:ce108eeb878d | 1030 | OWLevel(LEVEL_NORMAL); |
j3 | 2:02d228c25fd4 | 1031 | rtn_val = false; |
j3 | 2:02d228c25fd4 | 1032 | } |
j3 | 2:02d228c25fd4 | 1033 | |
j3 | 2:02d228c25fd4 | 1034 | rtn_val = true; |
j3 | 2:02d228c25fd4 | 1035 | } |
j3 | 2:02d228c25fd4 | 1036 | |
j3 | 1:91e52f8ab8bf | 1037 | return(rtn_val); |
j3 | 1:91e52f8ab8bf | 1038 | } |
j3 | 1:91e52f8ab8bf | 1039 | |
j3 | 1:91e52f8ab8bf | 1040 | |
j3 | 1:91e52f8ab8bf | 1041 | //********************************************************************* |
j3 | 5:ce108eeb878d | 1042 | const uint8_t (&Ds248x::OWgetROMnumber() const)[ROMnumberLen] |
j3 | 1:91e52f8ab8bf | 1043 | { |
j3 | 5:ce108eeb878d | 1044 | return _rom_number; |
j3 | 2:02d228c25fd4 | 1045 | } |
j3 | 6:1faafa0b3cd7 | 1046 | |
j3 | 6:1faafa0b3cd7 | 1047 | |
j3 | 6:1faafa0b3cd7 | 1048 | //********************************************************************* |
j3 | 6:1faafa0b3cd7 | 1049 | void Ds248x::set_i2c_adrs(DS248X_I2C_ADRS adrs) |
j3 | 6:1faafa0b3cd7 | 1050 | { |
j3 | 6:1faafa0b3cd7 | 1051 | _w_adrs = (adrs << 1); |
j3 | 6:1faafa0b3cd7 | 1052 | _r_adrs = (_w_adrs | 1); |
j3 | 6:1faafa0b3cd7 | 1053 | } |