1-Wire® library for mbed. Complete 1-Wire library that supports our silicon masters along with a bit-bang master on the MAX32600MBED platform with one common interface for mbed. Slave support has also been included and more slaves will be added as time permits.
Dependents: MAXREFDES131_Qt_Demo MAX32630FTHR_iButton_uSD_Logger MAX32630FTHR_DS18B20_uSD_Logger MAXREFDES130_131_Demo ... more
Superseded by MaximInterface.
Diff: Slaves/Sensors/DS18B20/DS18B20.cpp
- Revision:
- 101:e7f76cb49584
- Child:
- 104:3f48daed532b
diff -r 0500c20715ca -r e7f76cb49584 Slaves/Sensors/DS18B20/DS18B20.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Slaves/Sensors/DS18B20/DS18B20.cpp Sun Jul 03 20:35:38 2016 +0000 @@ -0,0 +1,351 @@ +/******************************************************************//** +* 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; +}