Mike Fruge
Implementation of 1-Wire with added Alarm Search Functionality
Dependents: Max32630_One_Wire_Interface
Diff: Slaves/Sensors/DS18B20/DS18B20.cpp
- Revision:
- 101:e7f76cb49584
- Child:
- 104:3f48daed532b
--- /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;
+}