Maxim Integrated / MaximInterface

Device interface library for multiple platforms including Mbed.

Dependents:   DeepCover Embedded Security in IoT MaximInterface MAXREFDES155#

Maxim Interface is a library framework focused on providing flexible and expressive hardware interfaces. Both communication interfaces such as I2C and 1-Wire and device interfaces such as DS18B20 are supported. Modern C++ concepts are used extensively while keeping compatibility with C++98/C++03 and requiring no external dependencies. The embedded-friendly design does not depend on exceptions or RTTI.

The full version of the project is hosted on GitLab: https://gitlab.com/iabenz/MaximInterface

MaximInterfaceDevices/DS2482_DS2484.cpp@12:7eb41621ba22, 2020-05-29 (annotated)

Committer:
IanBenzMaxim
Date:
Fri May 29 16:19:22 2020 -0500
Revision:
12:7eb41621ba22
Parent:
11:3f3bf6bf5e6c 
Updated to version 2.2.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
IanBenzMaxim 7:9cd16581b578 1 /*******************************************************************************
IanBenzMaxim 8:5ea891c7d1a1 2 * Copyright (C) Maxim Integrated Products, Inc., All Rights Reserved.
IanBenzMaxim 7:9cd16581b578 3 *
IanBenzMaxim 7:9cd16581b578 4 * Permission is hereby granted, free of charge, to any person obtaining a
IanBenzMaxim 7:9cd16581b578 5 * copy of this software and associated documentation files (the "Software"),
IanBenzMaxim 7:9cd16581b578 6 * to deal in the Software without restriction, including without limitation
IanBenzMaxim 7:9cd16581b578 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
IanBenzMaxim 7:9cd16581b578 8 * and/or sell copies of the Software, and to permit persons to whom the
IanBenzMaxim 7:9cd16581b578 9 * Software is furnished to do so, subject to the following conditions:
IanBenzMaxim 7:9cd16581b578 10 *
IanBenzMaxim 7:9cd16581b578 11 * The above copyright notice and this permission notice shall be included
IanBenzMaxim 7:9cd16581b578 12 * in all copies or substantial portions of the Software.
IanBenzMaxim 7:9cd16581b578 13 *
IanBenzMaxim 7:9cd16581b578 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
IanBenzMaxim 7:9cd16581b578 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
IanBenzMaxim 7:9cd16581b578 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IanBenzMaxim 7:9cd16581b578 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
IanBenzMaxim 7:9cd16581b578 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
IanBenzMaxim 7:9cd16581b578 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
IanBenzMaxim 7:9cd16581b578 20 * OTHER DEALINGS IN THE SOFTWARE.
IanBenzMaxim 7:9cd16581b578 21 *
IanBenzMaxim 7:9cd16581b578 22 * Except as contained in this notice, the name of Maxim Integrated
IanBenzMaxim 7:9cd16581b578 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
IanBenzMaxim 7:9cd16581b578 24 * Products, Inc. Branding Policy.
IanBenzMaxim 7:9cd16581b578 25 *
IanBenzMaxim 7:9cd16581b578 26 * The mere transfer of this software does not imply any licenses
IanBenzMaxim 7:9cd16581b578 27 * of trade secrets, proprietary technology, copyrights, patents,
IanBenzMaxim 7:9cd16581b578 28 * trademarks, maskwork rights, or any other form of intellectual
IanBenzMaxim 7:9cd16581b578 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
IanBenzMaxim 7:9cd16581b578 30 * ownership rights.
IanBenzMaxim 7:9cd16581b578 31 *******************************************************************************/
IanBenzMaxim 7:9cd16581b578 32
IanBenzMaxim 7:9cd16581b578 33 #include <MaximInterfaceCore/Error.hpp>
IanBenzMaxim 7:9cd16581b578 34 #include "DS2482_DS2484.hpp"
IanBenzMaxim 7:9cd16581b578 35
IanBenzMaxim 8:5ea891c7d1a1 36 #define TRY MaximInterfaceCore_TRY
IanBenzMaxim 8:5ea891c7d1a1 37 #define TRY_VALUE MaximInterfaceCore_TRY_VALUE
IanBenzMaxim 8:5ea891c7d1a1 38
IanBenzMaxim 7:9cd16581b578 39 namespace MaximInterfaceDevices {
IanBenzMaxim 7:9cd16581b578 40
IanBenzMaxim 7:9cd16581b578 41 using namespace Core;
IanBenzMaxim 7:9cd16581b578 42
IanBenzMaxim 8:5ea891c7d1a1 43 // Device status bits.
IanBenzMaxim 8:5ea891c7d1a1 44 static const uint_least8_t status_1WB = 0x01;
IanBenzMaxim 8:5ea891c7d1a1 45 static const uint_least8_t status_PPD = 0x02;
IanBenzMaxim 8:5ea891c7d1a1 46 static const uint_least8_t status_SD = 0x04;
IanBenzMaxim 8:5ea891c7d1a1 47 static const uint_least8_t status_SBR = 0x20;
IanBenzMaxim 8:5ea891c7d1a1 48 static const uint_least8_t status_TSB = 0x40;
IanBenzMaxim 8:5ea891c7d1a1 49 static const uint_least8_t status_DIR = 0x80;
IanBenzMaxim 7:9cd16581b578 50
IanBenzMaxim 8:5ea891c7d1a1 51 Result<void> DS2482_DS2484::initialize(Config config) {
IanBenzMaxim 8:5ea891c7d1a1 52 TRY(resetDevice());
IanBenzMaxim 7:9cd16581b578 53 // Write the default configuration setup.
IanBenzMaxim 8:5ea891c7d1a1 54 TRY(writeConfig(config));
IanBenzMaxim 8:5ea891c7d1a1 55 return none;
IanBenzMaxim 7:9cd16581b578 56 }
IanBenzMaxim 7:9cd16581b578 57
IanBenzMaxim 8:5ea891c7d1a1 58 Result<void> DS2482_DS2484::resetDevice() {
IanBenzMaxim 7:9cd16581b578 59 // Device Reset
IanBenzMaxim 7:9cd16581b578 60 // S AD,0 [A] DRST [A] Sr AD,1 [A] [SS] A\ P
IanBenzMaxim 7:9cd16581b578 61 // [] indicates from slave
IanBenzMaxim 7:9cd16581b578 62 // SS status byte to read to verify state
IanBenzMaxim 7:9cd16581b578 63
IanBenzMaxim 8:5ea891c7d1a1 64 TRY(sendCommand(0xF0));
IanBenzMaxim 7:9cd16581b578 65
IanBenzMaxim 7:9cd16581b578 66 uint_least8_t buf;
IanBenzMaxim 8:5ea891c7d1a1 67 TRY_VALUE(buf, readRegister());
IanBenzMaxim 7:9cd16581b578 68
IanBenzMaxim 7:9cd16581b578 69 if ((buf & 0xF7) != 0x10) {
IanBenzMaxim 8:5ea891c7d1a1 70 return HardwareError;
IanBenzMaxim 7:9cd16581b578 71 }
IanBenzMaxim 7:9cd16581b578 72
IanBenzMaxim 7:9cd16581b578 73 // Do a command to get 1-Wire master reset out of holding state.
IanBenzMaxim 7:9cd16581b578 74 reset();
IanBenzMaxim 7:9cd16581b578 75
IanBenzMaxim 8:5ea891c7d1a1 76 return none;
IanBenzMaxim 7:9cd16581b578 77 }
IanBenzMaxim 7:9cd16581b578 78
IanBenzMaxim 8:5ea891c7d1a1 79 Result<OneWireMaster::TripletData> DS2482_DS2484::triplet(bool sendBit) {
IanBenzMaxim 7:9cd16581b578 80 // 1-Wire Triplet (Case B)
IanBenzMaxim 7:9cd16581b578 81 // S AD,0 [A] 1WT [A] SS [A] Sr AD,1 [A] [Status] A [Status] A\ P
IanBenzMaxim 7:9cd16581b578 82 // \--------/
IanBenzMaxim 7:9cd16581b578 83 // Repeat until 1WB bit has changed to 0
IanBenzMaxim 7:9cd16581b578 84 // [] indicates from slave
IanBenzMaxim 7:9cd16581b578 85 // SS indicates byte containing search direction bit value in msbit
IanBenzMaxim 7:9cd16581b578 86
IanBenzMaxim 8:5ea891c7d1a1 87 TRY(sendCommand(0x78, sendBit ? 0x80 : 0x00));
IanBenzMaxim 8:5ea891c7d1a1 88
IanBenzMaxim 8:5ea891c7d1a1 89 uint_least8_t status;
IanBenzMaxim 8:5ea891c7d1a1 90 TRY_VALUE(status, pollBusy());
IanBenzMaxim 8:5ea891c7d1a1 91
IanBenzMaxim 8:5ea891c7d1a1 92 TripletData data;
IanBenzMaxim 8:5ea891c7d1a1 93 data.readBit = ((status & status_SBR) == status_SBR);
IanBenzMaxim 8:5ea891c7d1a1 94 data.readBitComplement = ((status & status_TSB) == status_TSB);
IanBenzMaxim 8:5ea891c7d1a1 95 data.writeBit = ((status & status_DIR) == status_DIR);
IanBenzMaxim 8:5ea891c7d1a1 96 return data;
IanBenzMaxim 7:9cd16581b578 97 }
IanBenzMaxim 7:9cd16581b578 98
IanBenzMaxim 8:5ea891c7d1a1 99 Result<void> DS2482_DS2484::reset() {
IanBenzMaxim 7:9cd16581b578 100 // 1-Wire reset (Case B)
IanBenzMaxim 7:9cd16581b578 101 // S AD,0 [A] 1WRS [A] Sr AD,1 [A] [Status] A [Status] A\ P
IanBenzMaxim 7:9cd16581b578 102 // \--------/
IanBenzMaxim 7:9cd16581b578 103 // Repeat until 1WB bit has changed to 0
IanBenzMaxim 7:9cd16581b578 104 // [] indicates from slave
IanBenzMaxim 7:9cd16581b578 105
IanBenzMaxim 8:5ea891c7d1a1 106 TRY(sendCommand(0xB4));
IanBenzMaxim 8:5ea891c7d1a1 107
IanBenzMaxim 8:5ea891c7d1a1 108 uint_least8_t status;
IanBenzMaxim 8:5ea891c7d1a1 109 TRY_VALUE(status, pollBusy());
IanBenzMaxim 7:9cd16581b578 110
IanBenzMaxim 8:5ea891c7d1a1 111 if ((status & status_SD) == status_SD) {
IanBenzMaxim 8:5ea891c7d1a1 112 return ShortDetectedError;
IanBenzMaxim 8:5ea891c7d1a1 113 }
IanBenzMaxim 8:5ea891c7d1a1 114 if ((status & status_PPD) != status_PPD) {
IanBenzMaxim 8:5ea891c7d1a1 115 return NoSlaveError;
IanBenzMaxim 7:9cd16581b578 116 }
IanBenzMaxim 7:9cd16581b578 117
IanBenzMaxim 8:5ea891c7d1a1 118 return none;
IanBenzMaxim 7:9cd16581b578 119 }
IanBenzMaxim 7:9cd16581b578 120
IanBenzMaxim 8:5ea891c7d1a1 121 Result<bool> DS2482_DS2484::touchBitSetLevel(bool sendBit, Level afterLevel) {
IanBenzMaxim 7:9cd16581b578 122 // 1-Wire bit (Case B)
IanBenzMaxim 7:9cd16581b578 123 // S AD,0 [A] 1WSB [A] BB [A] Sr AD,1 [A] [Status] A [Status] A\ P
IanBenzMaxim 7:9cd16581b578 124 // \--------/
IanBenzMaxim 7:9cd16581b578 125 // Repeat until 1WB bit has changed to 0
IanBenzMaxim 7:9cd16581b578 126 // [] indicates from slave
IanBenzMaxim 7:9cd16581b578 127 // BB indicates byte containing bit value in msbit
IanBenzMaxim 7:9cd16581b578 128
IanBenzMaxim 8:5ea891c7d1a1 129 TRY(configureLevel(afterLevel));
IanBenzMaxim 8:5ea891c7d1a1 130 TRY(sendCommand(0x87, sendBit ? 0x80 : 0x00));
IanBenzMaxim 7:9cd16581b578 131 uint_least8_t status;
IanBenzMaxim 8:5ea891c7d1a1 132 TRY_VALUE(status, pollBusy());
IanBenzMaxim 8:5ea891c7d1a1 133 return (status & status_SBR) == status_SBR;
IanBenzMaxim 7:9cd16581b578 134 }
IanBenzMaxim 7:9cd16581b578 135
IanBenzMaxim 8:5ea891c7d1a1 136 Result<void> DS2482_DS2484::writeByteSetLevel(uint_least8_t sendByte,
IanBenzMaxim 8:5ea891c7d1a1 137 Level afterLevel) {
IanBenzMaxim 7:9cd16581b578 138 // 1-Wire Write Byte (Case B)
IanBenzMaxim 7:9cd16581b578 139 // S AD,0 [A] 1WWB [A] DD [A] Sr AD,1 [A] [Status] A [Status] A\ P
IanBenzMaxim 7:9cd16581b578 140 // \--------/
IanBenzMaxim 7:9cd16581b578 141 // Repeat until 1WB bit has changed to 0
IanBenzMaxim 7:9cd16581b578 142 // [] indicates from slave
IanBenzMaxim 7:9cd16581b578 143 // DD data to write
IanBenzMaxim 7:9cd16581b578 144
IanBenzMaxim 8:5ea891c7d1a1 145 TRY(configureLevel(afterLevel));
IanBenzMaxim 8:5ea891c7d1a1 146 TRY(sendCommand(0xA5, sendByte));
IanBenzMaxim 8:5ea891c7d1a1 147 TRY(pollBusy());
IanBenzMaxim 8:5ea891c7d1a1 148 return none;
IanBenzMaxim 7:9cd16581b578 149 }
IanBenzMaxim 7:9cd16581b578 150
IanBenzMaxim 8:5ea891c7d1a1 151 Result<uint_least8_t> DS2482_DS2484::readByteSetLevel(Level afterLevel) {
IanBenzMaxim 7:9cd16581b578 152 // 1-Wire Read Bytes (Case C)
IanBenzMaxim 7:9cd16581b578 153 // S AD,0 [A] 1WRB [A] Sr AD,1 [A] [Status] A [Status] A
IanBenzMaxim 7:9cd16581b578 154 // \--------/
IanBenzMaxim 7:9cd16581b578 155 // Repeat until 1WB bit has changed to 0
IanBenzMaxim 7:9cd16581b578 156 // Sr AD,0 [A] SRP [A] E1 [A] Sr AD,1 [A] DD A\ P
IanBenzMaxim 7:9cd16581b578 157 //
IanBenzMaxim 7:9cd16581b578 158 // [] indicates from slave
IanBenzMaxim 7:9cd16581b578 159 // DD data read
IanBenzMaxim 7:9cd16581b578 160
IanBenzMaxim 8:5ea891c7d1a1 161 TRY(configureLevel(afterLevel));
IanBenzMaxim 8:5ea891c7d1a1 162 TRY(sendCommand(0x96));
IanBenzMaxim 8:5ea891c7d1a1 163 TRY(pollBusy());
IanBenzMaxim 8:5ea891c7d1a1 164 return readRegister(0xE1);
IanBenzMaxim 7:9cd16581b578 165 }
IanBenzMaxim 7:9cd16581b578 166
IanBenzMaxim 8:5ea891c7d1a1 167 Result<void> DS2482_DS2484::setSpeed(Speed newSpeed) {
IanBenzMaxim 7:9cd16581b578 168 // Check if supported speed
IanBenzMaxim 7:9cd16581b578 169 if (!((newSpeed == OverdriveSpeed) || (newSpeed == StandardSpeed))) {
IanBenzMaxim 8:5ea891c7d1a1 170 return InvalidSpeedError;
IanBenzMaxim 7:9cd16581b578 171 }
IanBenzMaxim 7:9cd16581b578 172 // Check if requested speed is already set
IanBenzMaxim 7:9cd16581b578 173 if (curConfig.get1WS() == (newSpeed == OverdriveSpeed)) {
IanBenzMaxim 8:5ea891c7d1a1 174 return none;
IanBenzMaxim 7:9cd16581b578 175 }
IanBenzMaxim 7:9cd16581b578 176 // Set the speed
IanBenzMaxim 7:9cd16581b578 177 return writeConfig(Config(curConfig).set1WS(newSpeed == OverdriveSpeed));
IanBenzMaxim 7:9cd16581b578 178 }
IanBenzMaxim 7:9cd16581b578 179
IanBenzMaxim 8:5ea891c7d1a1 180 Result<void> DS2482_DS2484::setLevel(Level newLevel) {
IanBenzMaxim 7:9cd16581b578 181 if (newLevel == StrongLevel) {
IanBenzMaxim 8:5ea891c7d1a1 182 return InvalidLevelError;
IanBenzMaxim 7:9cd16581b578 183 }
IanBenzMaxim 7:9cd16581b578 184
IanBenzMaxim 7:9cd16581b578 185 return configureLevel(newLevel);
IanBenzMaxim 7:9cd16581b578 186 }
IanBenzMaxim 7:9cd16581b578 187
IanBenzMaxim 8:5ea891c7d1a1 188 Result<void> DS2482_DS2484::writeConfig(Config config) {
IanBenzMaxim 7:9cd16581b578 189 uint_least8_t configBuf =
IanBenzMaxim 7:9cd16581b578 190 ((config.readByte() ^ 0xF) << 4) | config.readByte();
IanBenzMaxim 8:5ea891c7d1a1 191 TRY(sendCommand(0xD2, configBuf));
IanBenzMaxim 8:5ea891c7d1a1 192
IanBenzMaxim 8:5ea891c7d1a1 193 TRY_VALUE(configBuf, readRegister(0xC3));
IanBenzMaxim 8:5ea891c7d1a1 194
IanBenzMaxim 8:5ea891c7d1a1 195 if (configBuf != config.readByte()) {
IanBenzMaxim 8:5ea891c7d1a1 196 return HardwareError;
IanBenzMaxim 7:9cd16581b578 197 }
IanBenzMaxim 8:5ea891c7d1a1 198
IanBenzMaxim 8:5ea891c7d1a1 199 curConfig = config;
IanBenzMaxim 8:5ea891c7d1a1 200 return none;
IanBenzMaxim 7:9cd16581b578 201 }
IanBenzMaxim 7:9cd16581b578 202
IanBenzMaxim 8:5ea891c7d1a1 203 Result<uint_least8_t> DS2482_DS2484::readRegister(uint_least8_t reg) const {
IanBenzMaxim 8:5ea891c7d1a1 204 TRY(sendCommand(0xE1, reg));
IanBenzMaxim 8:5ea891c7d1a1 205 return readRegister();
IanBenzMaxim 7:9cd16581b578 206 }
IanBenzMaxim 7:9cd16581b578 207
IanBenzMaxim 8:5ea891c7d1a1 208 Result<uint_least8_t> DS2482_DS2484::readRegister() const {
IanBenzMaxim 8:5ea891c7d1a1 209 uint_least8_t buf;
IanBenzMaxim 8:5ea891c7d1a1 210 TRY(master->readPacket(address_, make_span(&buf, 1), I2CMaster::Stop));
IanBenzMaxim 8:5ea891c7d1a1 211 return buf;
IanBenzMaxim 7:9cd16581b578 212 }
IanBenzMaxim 7:9cd16581b578 213
IanBenzMaxim 8:5ea891c7d1a1 214 Result<uint_least8_t> DS2482_DS2484::pollBusy() {
IanBenzMaxim 7:9cd16581b578 215 const int pollLimit = 200;
IanBenzMaxim 7:9cd16581b578 216
IanBenzMaxim 7:9cd16581b578 217 int pollCount = 0;
IanBenzMaxim 7:9cd16581b578 218 uint_least8_t status;
IanBenzMaxim 7:9cd16581b578 219 do {
IanBenzMaxim 8:5ea891c7d1a1 220 TRY_VALUE(status, readRegister());
IanBenzMaxim 8:5ea891c7d1a1 221 if (pollCount++ >= pollLimit) {
IanBenzMaxim 8:5ea891c7d1a1 222 return HardwareError;
IanBenzMaxim 7:9cd16581b578 223 }
IanBenzMaxim 8:5ea891c7d1a1 224 } while ((status & status_1WB) == status_1WB);
IanBenzMaxim 8:5ea891c7d1a1 225 return status;
IanBenzMaxim 7:9cd16581b578 226 }
IanBenzMaxim 7:9cd16581b578 227
IanBenzMaxim 8:5ea891c7d1a1 228 Result<void> DS2482_DS2484::configureLevel(Level level) {
IanBenzMaxim 7:9cd16581b578 229 // Check if supported level
IanBenzMaxim 7:9cd16581b578 230 if (!((level == NormalLevel) || (level == StrongLevel))) {
IanBenzMaxim 8:5ea891c7d1a1 231 return InvalidLevelError;
IanBenzMaxim 7:9cd16581b578 232 }
IanBenzMaxim 7:9cd16581b578 233 // Check if requested level already set
IanBenzMaxim 7:9cd16581b578 234 if (curConfig.getSPU() == (level == StrongLevel)) {
IanBenzMaxim 8:5ea891c7d1a1 235 return none;
IanBenzMaxim 7:9cd16581b578 236 }
IanBenzMaxim 7:9cd16581b578 237 // Set the level
IanBenzMaxim 7:9cd16581b578 238 return writeConfig(Config(curConfig).setSPU(level == StrongLevel));
IanBenzMaxim 7:9cd16581b578 239 }
IanBenzMaxim 7:9cd16581b578 240
IanBenzMaxim 8:5ea891c7d1a1 241 Result<void> DS2482_DS2484::sendCommand(uint_least8_t cmd) const {
IanBenzMaxim 8:5ea891c7d1a1 242 return master->writePacket(address_, make_span(&cmd, 1), I2CMaster::Stop);
IanBenzMaxim 7:9cd16581b578 243 }
IanBenzMaxim 7:9cd16581b578 244
IanBenzMaxim 8:5ea891c7d1a1 245 Result<void> DS2482_DS2484::sendCommand(uint_least8_t cmd,
IanBenzMaxim 8:5ea891c7d1a1 246 uint_least8_t param) const {
IanBenzMaxim 8:5ea891c7d1a1 247 const uint_least8_t buf[] = {cmd, param};
IanBenzMaxim 8:5ea891c7d1a1 248 return master->writePacket(address_, buf, I2CMaster::Stop);
IanBenzMaxim 7:9cd16581b578 249 }
IanBenzMaxim 7:9cd16581b578 250
IanBenzMaxim 7:9cd16581b578 251 const error_category & DS2482_DS2484::errorCategory() {
IanBenzMaxim 7:9cd16581b578 252 static class : public error_category {
IanBenzMaxim 7:9cd16581b578 253 public:
IanBenzMaxim 11:3f3bf6bf5e6c 254 virtual const char * name() const {
IanBenzMaxim 11:3f3bf6bf5e6c 255 return "MaximInterfaceDevices.DS2482_DS2484";
IanBenzMaxim 11:3f3bf6bf5e6c 256 }
IanBenzMaxim 7:9cd16581b578 257
IanBenzMaxim 7:9cd16581b578 258 virtual std::string message(int condition) const {
IanBenzMaxim 7:9cd16581b578 259 switch (condition) {
IanBenzMaxim 7:9cd16581b578 260 case HardwareError:
IanBenzMaxim 7:9cd16581b578 261 return "Hardware Error";
IanBenzMaxim 7:9cd16581b578 262
IanBenzMaxim 7:9cd16581b578 263 case ArgumentOutOfRangeError:
IanBenzMaxim 7:9cd16581b578 264 return "Argument Out of Range Error";
IanBenzMaxim 7:9cd16581b578 265 }
IanBenzMaxim 8:5ea891c7d1a1 266 return defaultErrorMessage(condition);
IanBenzMaxim 7:9cd16581b578 267 }
IanBenzMaxim 7:9cd16581b578 268 } instance;
IanBenzMaxim 7:9cd16581b578 269 return instance;
IanBenzMaxim 7:9cd16581b578 270 }
IanBenzMaxim 7:9cd16581b578 271
IanBenzMaxim 8:5ea891c7d1a1 272 Result<void> DS2482_800::selectChannel(int channel) {
IanBenzMaxim 7:9cd16581b578 273 // Channel Select (Case A)
IanBenzMaxim 7:9cd16581b578 274 // S AD,0 [A] CHSL [A] CC [A] Sr AD,1 [A] [RR] A\ P
IanBenzMaxim 7:9cd16581b578 275 // [] indicates from slave
IanBenzMaxim 7:9cd16581b578 276 // CC channel value
IanBenzMaxim 7:9cd16581b578 277 // RR channel read back
IanBenzMaxim 7:9cd16581b578 278
IanBenzMaxim 7:9cd16581b578 279 uint_least8_t ch;
IanBenzMaxim 7:9cd16581b578 280 uint_least8_t ch_read;
IanBenzMaxim 7:9cd16581b578 281 switch (channel) {
IanBenzMaxim 7:9cd16581b578 282 case 0:
IanBenzMaxim 7:9cd16581b578 283 ch = 0xF0;
IanBenzMaxim 7:9cd16581b578 284 ch_read = 0xB8;
IanBenzMaxim 7:9cd16581b578 285 break;
IanBenzMaxim 7:9cd16581b578 286
IanBenzMaxim 7:9cd16581b578 287 case 1:
IanBenzMaxim 7:9cd16581b578 288 ch = 0xE1;
IanBenzMaxim 7:9cd16581b578 289 ch_read = 0xB1;
IanBenzMaxim 7:9cd16581b578 290 break;
IanBenzMaxim 7:9cd16581b578 291
IanBenzMaxim 7:9cd16581b578 292 case 2:
IanBenzMaxim 7:9cd16581b578 293 ch = 0xD2;
IanBenzMaxim 7:9cd16581b578 294 ch_read = 0xAA;
IanBenzMaxim 7:9cd16581b578 295 break;
IanBenzMaxim 7:9cd16581b578 296
IanBenzMaxim 7:9cd16581b578 297 case 3:
IanBenzMaxim 7:9cd16581b578 298 ch = 0xC3;
IanBenzMaxim 7:9cd16581b578 299 ch_read = 0xA3;
IanBenzMaxim 7:9cd16581b578 300 break;
IanBenzMaxim 7:9cd16581b578 301
IanBenzMaxim 7:9cd16581b578 302 case 4:
IanBenzMaxim 7:9cd16581b578 303 ch = 0xB4;
IanBenzMaxim 7:9cd16581b578 304 ch_read = 0x9C;
IanBenzMaxim 7:9cd16581b578 305 break;
IanBenzMaxim 7:9cd16581b578 306
IanBenzMaxim 7:9cd16581b578 307 case 5:
IanBenzMaxim 7:9cd16581b578 308 ch = 0xA5;
IanBenzMaxim 7:9cd16581b578 309 ch_read = 0x95;
IanBenzMaxim 7:9cd16581b578 310 break;
IanBenzMaxim 7:9cd16581b578 311
IanBenzMaxim 7:9cd16581b578 312 case 6:
IanBenzMaxim 7:9cd16581b578 313 ch = 0x96;
IanBenzMaxim 7:9cd16581b578 314 ch_read = 0x8E;
IanBenzMaxim 7:9cd16581b578 315 break;
IanBenzMaxim 7:9cd16581b578 316
IanBenzMaxim 7:9cd16581b578 317 case 7:
IanBenzMaxim 7:9cd16581b578 318 ch = 0x87;
IanBenzMaxim 7:9cd16581b578 319 ch_read = 0x87;
IanBenzMaxim 7:9cd16581b578 320 break;
IanBenzMaxim 7:9cd16581b578 321
IanBenzMaxim 7:9cd16581b578 322 default:
IanBenzMaxim 8:5ea891c7d1a1 323 return ArgumentOutOfRangeError;
IanBenzMaxim 7:9cd16581b578 324 };
IanBenzMaxim 7:9cd16581b578 325
IanBenzMaxim 8:5ea891c7d1a1 326 TRY(sendCommand(0xC3, ch));
IanBenzMaxim 8:5ea891c7d1a1 327 TRY_VALUE(ch, readRegister());
IanBenzMaxim 8:5ea891c7d1a1 328 // check for failure due to incorrect read back of channel
IanBenzMaxim 8:5ea891c7d1a1 329 if (ch != ch_read) {
IanBenzMaxim 8:5ea891c7d1a1 330 return HardwareError;
IanBenzMaxim 7:9cd16581b578 331 }
IanBenzMaxim 7:9cd16581b578 332
IanBenzMaxim 8:5ea891c7d1a1 333 return none;
IanBenzMaxim 7:9cd16581b578 334 }
IanBenzMaxim 7:9cd16581b578 335
IanBenzMaxim 8:5ea891c7d1a1 336 Result<void> DS2484::adjustPort(PortParameter param, int val) {
IanBenzMaxim 7:9cd16581b578 337 if (val < 0 || val > 15) {
IanBenzMaxim 8:5ea891c7d1a1 338 return ArgumentOutOfRangeError;
IanBenzMaxim 7:9cd16581b578 339 }
IanBenzMaxim 7:9cd16581b578 340
IanBenzMaxim 8:5ea891c7d1a1 341 TRY(sendCommand(0xC3, (param << 4) | val));
IanBenzMaxim 7:9cd16581b578 342
IanBenzMaxim 7:9cd16581b578 343 uint_least8_t portConfig = val + 1;
IanBenzMaxim 7:9cd16581b578 344 for (int reads = -1; reads < param; ++reads) {
IanBenzMaxim 8:5ea891c7d1a1 345 TRY_VALUE(portConfig, readRegister());
IanBenzMaxim 7:9cd16581b578 346 }
IanBenzMaxim 7:9cd16581b578 347 if (val != portConfig) {
IanBenzMaxim 8:5ea891c7d1a1 348 return HardwareError;
IanBenzMaxim 7:9cd16581b578 349 }
IanBenzMaxim 7:9cd16581b578 350
IanBenzMaxim 8:5ea891c7d1a1 351 return none;
IanBenzMaxim 7:9cd16581b578 352 }
IanBenzMaxim 7:9cd16581b578 353
IanBenzMaxim 7:9cd16581b578 354 } // namespace MaximInterfaceDevices