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/DS1920.hpp@7:9cd16581b578, 2019-07-22 (annotated)

Committer:
IanBenzMaxim
Date:
Mon Jul 22 11:44:07 2019 -0500
Revision:
7:9cd16581b578
Child:
8:5ea891c7d1a1
Updated to version 1.9.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
IanBenzMaxim 7:9cd16581b578 1 /*******************************************************************************
IanBenzMaxim 7:9cd16581b578 2 * Copyright (C) 2017 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 #ifndef MaximInterfaceDevices_DS1920
IanBenzMaxim 7:9cd16581b578 34 #define MaximInterfaceDevices_DS1920
IanBenzMaxim 7:9cd16581b578 35
IanBenzMaxim 7:9cd16581b578 36 #include <MaximInterfaceCore/array_span.hpp>
IanBenzMaxim 7:9cd16581b578 37 #include <MaximInterfaceCore/SelectRom.hpp>
IanBenzMaxim 7:9cd16581b578 38 #include <MaximInterfaceCore/Sleep.hpp>
IanBenzMaxim 7:9cd16581b578 39 #include "Config.hpp"
IanBenzMaxim 7:9cd16581b578 40
IanBenzMaxim 7:9cd16581b578 41 namespace MaximInterfaceDevices {
IanBenzMaxim 7:9cd16581b578 42
IanBenzMaxim 7:9cd16581b578 43 /// @brief DS1920 1-Wire Temperature iButton
IanBenzMaxim 7:9cd16581b578 44 /// @details The iButton® temperature logger (DS1920) provides
IanBenzMaxim 7:9cd16581b578 45 /// direct-to-digital 9-bit temperature readings over a range of
IanBenzMaxim 7:9cd16581b578 46 /// -55°C to +100°C in 0.5° increments. The iButton communicates with
IanBenzMaxim 7:9cd16581b578 47 /// a processor using the 1-Wire® protocol through a hardware port
IanBenzMaxim 7:9cd16581b578 48 /// interface. The port interface provides both the physical link and
IanBenzMaxim 7:9cd16581b578 49 /// handles the communication protocols that enable the processor to
IanBenzMaxim 7:9cd16581b578 50 /// access iButton resources with simple commands. Two bytes of
IanBenzMaxim 7:9cd16581b578 51 /// EEPROM can be used either to set alarm triggers or for storing
IanBenzMaxim 7:9cd16581b578 52 /// user data.
IanBenzMaxim 7:9cd16581b578 53 class DS1920 {
IanBenzMaxim 7:9cd16581b578 54 public:
IanBenzMaxim 7:9cd16581b578 55 enum ErrorValue { CrcError = 1, DataError };
IanBenzMaxim 7:9cd16581b578 56
IanBenzMaxim 7:9cd16581b578 57 /// Holds the contents of the device scratchpad.
IanBenzMaxim 7:9cd16581b578 58 typedef Core::array_span<uint_least8_t, 8> Scratchpad;
IanBenzMaxim 7:9cd16581b578 59
IanBenzMaxim 7:9cd16581b578 60 DS1920(Core::Sleep & sleep, Core::OneWireMaster & master,
IanBenzMaxim 7:9cd16581b578 61 const Core::SelectRom & selectRom)
IanBenzMaxim 7:9cd16581b578 62 : selectRom(selectRom), master(&master), sleep(&sleep) {}
IanBenzMaxim 7:9cd16581b578 63
IanBenzMaxim 7:9cd16581b578 64 void setSleep(Core::Sleep & sleep) { this->sleep = &sleep; }
IanBenzMaxim 7:9cd16581b578 65
IanBenzMaxim 7:9cd16581b578 66 void setMaster(Core::OneWireMaster & master) { this->master = &master; }
IanBenzMaxim 7:9cd16581b578 67
IanBenzMaxim 7:9cd16581b578 68 void setSelectRom(const Core::SelectRom & selectRom) {
IanBenzMaxim 7:9cd16581b578 69 this->selectRom = selectRom;
IanBenzMaxim 7:9cd16581b578 70 }
IanBenzMaxim 7:9cd16581b578 71
IanBenzMaxim 7:9cd16581b578 72 /// @brief Write Scratchpad Command
IanBenzMaxim 7:9cd16581b578 73 /// @details If the result of a temperature measurement is higher
IanBenzMaxim 7:9cd16581b578 74 /// than TH or lower than TL, an alarm flag inside the device is
IanBenzMaxim 7:9cd16581b578 75 /// set. This flag is updated with every temperature measurement.
IanBenzMaxim 7:9cd16581b578 76 /// As long as the alarm flag is set, the DS1920 will respond to
IanBenzMaxim 7:9cd16581b578 77 /// the alarm search command.
IanBenzMaxim 7:9cd16581b578 78 /// @param[in] th 8-bit upper temperature threshold, MSB indicates sign.
IanBenzMaxim 7:9cd16581b578 79 /// @param[in] tl 8-bit lower temperature threshold, MSB indicates sign.
IanBenzMaxim 7:9cd16581b578 80 MaximInterfaceDevices_EXPORT Core::error_code
IanBenzMaxim 7:9cd16581b578 81 writeScratchpad(uint_least8_t th, uint_least8_t tl);
IanBenzMaxim 7:9cd16581b578 82
IanBenzMaxim 7:9cd16581b578 83 /// @brief Read Scratchpad Command
IanBenzMaxim 7:9cd16581b578 84 /// @param[out] scratchpad Contents of scratchpad.
IanBenzMaxim 7:9cd16581b578 85 MaximInterfaceDevices_EXPORT Core::error_code
IanBenzMaxim 7:9cd16581b578 86 readScratchpad(Scratchpad::span scratchpad);
IanBenzMaxim 7:9cd16581b578 87
IanBenzMaxim 7:9cd16581b578 88 /// @brief Copy Scratchpad Command
IanBenzMaxim 7:9cd16581b578 89 /// @details This command copies from the scratchpad into the
IanBenzMaxim 7:9cd16581b578 90 /// EEPROM of the DS1920, storing the temperature trigger bytes
IanBenzMaxim 7:9cd16581b578 91 /// in nonvolatile memory.
IanBenzMaxim 7:9cd16581b578 92 MaximInterfaceDevices_EXPORT Core::error_code copyScratchpad();
IanBenzMaxim 7:9cd16581b578 93
IanBenzMaxim 7:9cd16581b578 94 /// @brief Convert Temperature Command
IanBenzMaxim 7:9cd16581b578 95 /// @details This command begins a temperature conversion.
IanBenzMaxim 7:9cd16581b578 96 MaximInterfaceDevices_EXPORT Core::error_code convertTemperature();
IanBenzMaxim 7:9cd16581b578 97
IanBenzMaxim 7:9cd16581b578 98 /// @brief Recall Command
IanBenzMaxim 7:9cd16581b578 99 /// @details This command recalls the temperature trigger values
IanBenzMaxim 7:9cd16581b578 100 /// stored in EEPROM to the scratchpad.
IanBenzMaxim 7:9cd16581b578 101 MaximInterfaceDevices_EXPORT Core::error_code recallEeprom();
IanBenzMaxim 7:9cd16581b578 102
IanBenzMaxim 7:9cd16581b578 103 MaximInterfaceDevices_EXPORT static const Core::error_category &
IanBenzMaxim 7:9cd16581b578 104 errorCategory();
IanBenzMaxim 7:9cd16581b578 105
IanBenzMaxim 7:9cd16581b578 106 private:
IanBenzMaxim 7:9cd16581b578 107 Core::SelectRom selectRom;
IanBenzMaxim 7:9cd16581b578 108 Core::OneWireMaster * master;
IanBenzMaxim 7:9cd16581b578 109 const Core::Sleep * sleep;
IanBenzMaxim 7:9cd16581b578 110 };
IanBenzMaxim 7:9cd16581b578 111
IanBenzMaxim 7:9cd16581b578 112 /// @brief Reads the current temperature as an integer value.
IanBenzMaxim 7:9cd16581b578 113 /// @param ds1920 Device to read.
IanBenzMaxim 7:9cd16581b578 114 /// @param[out] temperature Temperature in degrees Celsius multiplied by 2.
IanBenzMaxim 7:9cd16581b578 115 MaximInterfaceDevices_EXPORT Core::error_code
IanBenzMaxim 7:9cd16581b578 116 readTemperature(DS1920 & ds1920, int & temperature);
IanBenzMaxim 7:9cd16581b578 117
IanBenzMaxim 7:9cd16581b578 118 inline Core::error_code make_error_code(DS1920::ErrorValue e) {
IanBenzMaxim 7:9cd16581b578 119 return Core::error_code(e, DS1920::errorCategory());
IanBenzMaxim 7:9cd16581b578 120 }
IanBenzMaxim 7:9cd16581b578 121
IanBenzMaxim 7:9cd16581b578 122 } // namespace MaximInterfaceDevices
IanBenzMaxim 7:9cd16581b578 123
IanBenzMaxim 7:9cd16581b578 124 #endif