Implementation of 1-Wire with added Alarm Search Functionality
Dependents: Max32630_One_Wire_Interface
Slaves/Sensors/DS1920/DS1920.cpp
- Committer:
- mfruge
- Date:
- 2019-08-13
- Revision:
- 142:85b71cfd617e
- Parent:
- 104:3f48daed532b
File content as of revision 142:85b71cfd617e:
/******************************************************************//** * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included * in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. * * Except as contained in this notice, the name of Maxim Integrated * Products, Inc. shall not be used except as stated in the Maxim Integrated * Products, Inc. Branding Policy. * * The mere transfer of this software does not imply any licenses * of trade secrets, proprietary technology, copyrights, patents, * trademarks, maskwork rights, or any other form of intellectual * property whatsoever. Maxim Integrated Products, Inc. retains all * ownership rights. **********************************************************************/ #include "Slaves/Sensors/DS1920/DS1920.h" #include "wait_api.h" using namespace OneWire; using namespace OneWire::crc; enum DS1920_CMDS { WRITE_SCRATCHPAD = 0x4E, READ_SCRATCHPAD = 0xBE, COPY_SCRATCHPAD = 0x48, CONV_TEMPERATURE = 0x44, RECALL = 0xB8 }; /**********************************************************************/ DS1920::DS1920(RandomAccessRomIterator &selector):OneWireSlave(selector) { } /**********************************************************************/ DS1920::CmdResult DS1920::writeScratchPad(uint8_t th, uint8_t tl) { DS1920::CmdResult deviceResult = DS1920::OpFailure; OneWireMaster::CmdResult owmResult = selectDevice(); if (owmResult == OneWireMaster::Success) { uint8_t sendBlock[] = {WRITE_SCRATCHPAD, th, tl}; owmResult = master().OWWriteBlock(sendBlock, 3); if (owmResult == OneWireMaster::Success) { deviceResult = DS1920::Success; } else { deviceResult = DS1920::CommsWriteError; } } return deviceResult; } /**********************************************************************/ DS1920::CmdResult DS1920::readScratchPad(uint8_t * scratchPadBuff) { DS1920::CmdResult deviceResult = DS1920::OpFailure; OneWireMaster::CmdResult owmResult = selectDevice(); if (owmResult == OneWireMaster::Success) { uint8_t cmd = READ_SCRATCHPAD; owmResult = master().OWWriteBlock(&cmd, 1); if (owmResult == OneWireMaster::Success) { uint8_t rxBlock[9]; owmResult = master().OWReadBlock(rxBlock, 9); uint8_t crcCheck = calculateCrc8(rxBlock, 8); if ((owmResult == OneWireMaster::Success) && (crcCheck == rxBlock[8])) { std::memcpy(scratchPadBuff, rxBlock, 8); deviceResult = DS1920::Success; } else { deviceResult = DS1920::CommsReadError; } } else { deviceResult = DS1920::CommsWriteError; } } return deviceResult; } /**********************************************************************/ DS1920::CmdResult DS1920::copyScratchPad( void ) { DS1920::CmdResult deviceResult = DS1920::OpFailure; OneWireMaster::CmdResult owmResult = selectDevice(); if (owmResult == OneWireMaster::Success) { owmResult = master().OWWriteByteSetLevel(COPY_SCRATCHPAD, OneWireMaster::StrongLevel); if (owmResult == OneWireMaster::Success) { wait_ms(10); owmResult = master().OWSetLevel(OneWireMaster::NormalLevel); if (owmResult == OneWireMaster::Success) { deviceResult = DS1920::Success; } } else { deviceResult = DS1920::CommsWriteError; } } return deviceResult; } /**********************************************************************/ DS1920::CmdResult DS1920::convertTemperature(float & temp) { DS1920::CmdResult deviceResult = DS1920::OpFailure; OneWireMaster::CmdResult owmResult = selectDevice(); if (owmResult == OneWireMaster::Success) { owmResult = master().OWWriteByteSetLevel(CONV_TEMPERATURE, OneWireMaster::StrongLevel); if (owmResult == OneWireMaster::Success) { wait_ms(750); owmResult = master().OWSetLevel(OneWireMaster::NormalLevel); if (owmResult == OneWireMaster::Success) { uint8_t scratchPadBuff[8]; deviceResult = this->readScratchPad(scratchPadBuff); if(deviceResult == DS1920::Success) { if(scratchPadBuff[0] & 1) { temp = (((float) (scratchPadBuff[0] >> 1)) + 0.5F); } else { temp = ((float) (scratchPadBuff[0] >> 1)); } if(scratchPadBuff[1]) { temp = (temp * -1.0F); } } } } else { deviceResult = DS1920::CommsWriteError; } } return deviceResult; } /**********************************************************************/ DS1920::CmdResult DS1920::recallEEPROM( void ) { DS1920::CmdResult deviceResult = DS1920::OpFailure; OneWireMaster::CmdResult owmResult = selectDevice(); if (owmResult == OneWireMaster::Success) { uint8_t cmd = RECALL; owmResult = master().OWWriteBlock(&cmd, 1); if (owmResult == OneWireMaster::Success) { deviceResult = DS1920::Success; } else { deviceResult = DS1920::CommsWriteError; } } return deviceResult; }