Implementation of 1-Wire with added Alarm Search Functionality
Dependents: Max32630_One_Wire_Interface
Slaves/Sensors/DS18B20/DS18B20.cpp
- Committer:
- j3
- Date:
- 2016-07-03
- Revision:
- 101:e7f76cb49584
- Child:
- 104:3f48daed532b
File content as of revision 101:e7f76cb49584:
/******************************************************************//** * 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 "DS18B20.h" #include "wait_api.h" using namespace OneWire; using namespace OneWire::crc; enum DS18B20_CMDS { WRITE_SCRATCHPAD = 0x4E, READ_SCRATCHPAD = 0xBE, COPY_SCRATCHPAD = 0x48, CONV_TEMPERATURE = 0x44, READ_POWER_SUPPY = 0xB4, RECALL = 0xB8 }; /**********************************************************************/ DS18B20::DS18B20(RandomAccessRomIterator &selector):OneWireSlave(selector) { } /**********************************************************************/ OneWireSlave::CmdResult DS18B20::writeScratchPad(uint8_t th, uint8_t tl, Resolution res) { OneWireSlave::CmdResult deviceResult = OneWireSlave::OperationFailure; OneWireMaster::CmdResult owmResult = selectDevice(); if (owmResult == OneWireMaster::Success) { uint8_t sendBlock[] = {WRITE_SCRATCHPAD, th, tl, res}; owmResult = master().OWWriteBlock(sendBlock, 4); if (owmResult == OneWireMaster::Success) { deviceResult = OneWireSlave::Success; } else { deviceResult = OneWireSlave::CommunicationError; } } return deviceResult; } /**********************************************************************/ OneWireSlave::CmdResult DS18B20::readScratchPad(uint8_t * scratchPadBuff) { OneWireSlave::CmdResult deviceResult = OneWireSlave::OperationFailure; OneWireMaster::CmdResult owmResult = selectDevice(); if (owmResult == OneWireMaster::Success) { owmResult = master().OWWriteByteSetLevel(READ_SCRATCHPAD, OneWireMaster::NormalLevel); 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 = OneWireSlave::Success; } else { deviceResult = OneWireSlave::CommunicationError; } } else { deviceResult = OneWireSlave::CommunicationError; } } return deviceResult; } /**********************************************************************/ OneWireSlave::CmdResult DS18B20::readPowerSupply(bool & localPower) { OneWireSlave::CmdResult deviceResult = OneWireSlave::OperationFailure; OneWireMaster::CmdResult owmResult = selectDevice(); if (owmResult == OneWireMaster::Success) { owmResult = master().OWWriteByteSetLevel(READ_POWER_SUPPY, OneWireMaster::NormalLevel); if(owmResult == OneWireMaster::Success) { uint8_t rtnBit = 0; owmResult = master().OWTouchBitSetLevel(rtnBit, OneWireMaster::NormalLevel); if(owmResult == OneWireMaster::Success) { localPower = (rtnBit & 0x01); deviceResult = OneWireSlave::Success; } else { deviceResult = OneWireSlave::CommunicationError; } } else { deviceResult = OneWireSlave::CommunicationError; } } return deviceResult; } /**********************************************************************/ OneWireSlave::CmdResult DS18B20::copyScratchPad( void ) { OneWireSlave::CmdResult deviceResult = OneWireSlave::OperationFailure; bool hasLocalPower = false; deviceResult = this->readPowerSupply(hasLocalPower); if(deviceResult == OneWireSlave::Success) { OneWireMaster::CmdResult owmResult = selectDevice(); if (owmResult == OneWireMaster::Success) { if(hasLocalPower) { owmResult = master().OWWriteByteSetLevel(COPY_SCRATCHPAD, OneWireMaster::NormalLevel); if (owmResult == OneWireMaster::Success) { uint8_t recvbit = 0; do { owmResult = master().OWTouchBitSetLevel(recvbit, OneWireMaster::NormalLevel); } while((!recvbit) && (owmResult == OneWireMaster::Success)); if ((owmResult == OneWireMaster::Success) && (recvbit & 1)) { deviceResult = OneWireSlave::Success; } else { deviceResult = OneWireSlave::TimeoutError; } } else { deviceResult = OneWireSlave::CommunicationError; } } else { owmResult = master().OWWriteByteSetLevel(COPY_SCRATCHPAD, OneWireMaster::StrongLevel); if (owmResult == OneWireMaster::Success) { wait_ms(10); owmResult = master().OWSetLevel(OneWireMaster::NormalLevel); if (owmResult == OneWireMaster::Success) { deviceResult = OneWireSlave::Success; } else { deviceResult = OneWireSlave::CommunicationError; } } else { deviceResult = OneWireSlave::CommunicationError; } } } else { deviceResult = OneWireSlave::OperationFailure; } } return deviceResult; } /**********************************************************************/ OneWireSlave::CmdResult DS18B20::convertTemperature(float & temp) { OneWireSlave::CmdResult deviceResult = OneWireSlave::OperationFailure; bool hasLocalPower = false; deviceResult = this->readPowerSupply(hasLocalPower); uint8_t scratchPadBuff[8]; if (deviceResult == OneWireMaster::Success) { OneWireMaster::CmdResult owmResult = selectDevice(); if(owmResult == OneWireMaster::Success) { if(hasLocalPower) { owmResult = master().OWWriteByteSetLevel(CONV_TEMPERATURE, OneWireMaster::NormalLevel); if (owmResult == OneWireMaster::Success) { uint8_t recvbit = 0; do { owmResult = master().OWTouchBitSetLevel(recvbit, OneWireMaster::NormalLevel); } while((owmResult == OneWireMaster::Success) && (!recvbit)); if((owmResult == OneWireMaster::Success) && (recvbit & 1)) { deviceResult = this->readScratchPad(scratchPadBuff); } else { deviceResult = OneWireSlave::TimeoutError; } } else { deviceResult = OneWireSlave::CommunicationError; } } else { owmResult = master().OWWriteByteSetLevel(CONV_TEMPERATURE, OneWireMaster::StrongLevel); if (owmResult == OneWireMaster::Success) { wait_ms(750); owmResult = master().OWSetLevel(OneWireMaster::NormalLevel); if (owmResult == OneWireMaster::Success) { deviceResult = this->readScratchPad(scratchPadBuff); } else { deviceResult = OneWireSlave::CommunicationError; } } else { deviceResult = OneWireSlave::CommunicationError; } } } else { deviceResult = OneWireSlave::OperationFailure; } } if(deviceResult == OneWireSlave::Success) { int16_t intTemp = ((scratchPadBuff[1] << 8) | scratchPadBuff[0]); switch(scratchPadBuff[4]) { case DS18B20::NINE_BIT: temp = (intTemp * 0.5F); break; case DS18B20::TEN_BIT: temp = (intTemp * 0.25F); break; case DS18B20::ELEVEN_BIT: temp = (intTemp * 0.125F); break; case DS18B20::TWELVE_BIT: temp = (intTemp * 0.0625F); break; default: deviceResult = OneWireSlave::OperationFailure; break; } } return deviceResult; } /**********************************************************************/ OneWireSlave::CmdResult DS18B20::recallEEPROM( void ) { OneWireSlave::CmdResult deviceResult = OneWireSlave::OperationFailure; OneWireMaster::CmdResult owmResult = selectDevice(); if (owmResult == OneWireMaster::Success) { uint8_t cmd = RECALL; owmResult = master().OWWriteBlock(&cmd, 1); if (owmResult == OneWireMaster::Success) { deviceResult = OneWireSlave::Success; } else { deviceResult = OneWireSlave::CommunicationError; } } return deviceResult; }