Implementation of 1-Wire with added Alarm Search Functionality
Dependents: Max32630_One_Wire_Interface
Slaves/Memory/DS2431/DS2431.cpp
- Committer:
- j3
- Date:
- 2016-08-22
- Revision:
- 115:a1ca2f3bf46d
- Parent:
- 110:a3b5e2a4fdf2
- Child:
- 116:8058bb54e959
File content as of revision 115:a1ca2f3bf46d:
/******************************************************************//** * 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 "wait_api.h" #include "Slaves/Memory/DS2431/DS2431.h" using namespace OneWire; using namespace OneWire::crc; enum DS2431_CMDS { WRITE_SCRATCHPAD = 0x0F, READ_SCRATCHPAD = 0xAA, COPY_SCRATCHPAD = 0x55, READ_MEMORY = 0xF0 }; //********************************************************************* DS2431::DS2431(RandomAccessRomIterator &selector):OneWireSlave(selector) { } //********************************************************************* OneWireSlave::CmdResult DS2431::writeScratchPad(uint16_t targetAddress, uint8_t *data) { OneWireSlave::CmdResult result = OneWireSlave::OperationFailure; OneWireMaster::CmdResult owmResult = selectDevice(); if(owmResult == OneWireMaster::Success) { uint8_t sendBlock[11]; sendBlock[0] = WRITE_SCRATCHPAD; sendBlock[1] = (targetAddress &0xFF); sendBlock[2] = ((targetAddress >> 8) &0xFF); std::memcpy((sendBlock + 3), data, 8); owmResult = master().OWWriteBlock(sendBlock, 11); uint16_t invCRC16; uint8_t recvbyte; master().OWReadByteSetLevel(recvbyte, OneWireMaster::NormalLevel); invCRC16 = recvbyte; master().OWReadByteSetLevel(recvbyte, OneWireMaster::NormalLevel); invCRC16 |= (recvbyte << 8); //calc our own inverted CRC16 to compare with one returned uint16_t calculatedInvCRC16 = ~calculateCrc16(sendBlock, 0, 11); if(invCRC16 == calculatedInvCRC16) { result = OneWireSlave::Success; } } return result; } //********************************************************************* OneWireSlave::CmdResult DS2431::readScratchPad(uint8_t *data) { OneWireSlave::CmdResult result = OneWireSlave::OperationFailure; OneWireMaster::CmdResult owmResult = selectDevice(); if(owmResult == OneWireMaster::Success) { owmResult = master().OWWriteByteSetLevel(READ_SCRATCHPAD, OneWireMaster::NormalLevel); if(owmResult == OneWireMaster::Success) { uint8_t recvBlock[13]; owmResult = master().OWReadBlock(recvBlock, 13); uint16_t invCRC16 = ((recvBlock[12] << 8) | recvBlock[11]); uint8_t idx = 12; while(--idx) { recvBlock[idx] = recvBlock[idx - 1]; } recvBlock[0] = READ_SCRATCHPAD; //calc our own inverted CRC16 to compare with one returned uint16_t calculatedInvCRC16 = ~calculateCrc16(recvBlock, 0, 12); if(invCRC16 == calculatedInvCRC16) { std::memcpy(data, (recvBlock + 1), 11); result = OneWireSlave::Success; } } } return result; } //********************************************************************* OneWireSlave::CmdResult DS2431::copyScratchPad(uint16_t targetAddress, uint8_t esByte) { OneWireSlave::CmdResult result = OneWireSlave::OperationFailure; OneWireMaster::CmdResult owmResult = selectDevice(); if(owmResult == OneWireMaster::Success) { uint8_t sendBlock[] = {COPY_SCRATCHPAD, (targetAddress & 0xFF), ((targetAddress >> 8) & 0xFF), esByte}; owmResult = master().OWWriteBlock(sendBlock, 4); master().OWSetLevel(OneWireMaster::StrongLevel); wait_ms(10); master().OWSetLevel(OneWireMaster::NormalLevel); uint8_t check; master().OWReadByteSetLevel(check, OneWireMaster::NormalLevel); if(check == 0xAA) { result = OneWireSlave::Success; } } return result; } //********************************************************************* OneWireSlave::CmdResult DS2431::writeBlock(uint16_t targetAddress, uint8_t *data, uint8_t numBytes) { OneWireSlave::CmdResult result = OneWireSlave::OperationFailure; if((targetAddress + numBytes) <= 0x88) { result = OneWireSlave::Success; uint8_t startOffset = (targetAddress & 0x0007); uint16_t startRowAddress = (targetAddress & 0xFFF8); uint8_t endOffset = ((targetAddress + numBytes) & 0x0007); uint16_t endRowAddress = ((targetAddress + numBytes) & 0xFFF8); uint8_t *dataIdx = data; uint8_t localData[12]; if(startOffset != 0) { result = this->readBlock(startRowAddress, localData, 8); if(result == OneWireSlave::Success) { std::memcpy((localData + startOffset), data, (8 - startOffset)); result = this->writeScratchPad(startRowAddress, localData); if(result == OneWireSlave::Success) { result = this->readScratchPad(localData); if(result == OneWireSlave::Success) { result = this->copyScratchPad(startRowAddress, localData[2]); startRowAddress += 8; dataIdx = (data + (8 - startOffset)); } } } } if(result == OneWireSlave::Success) { for(uint16_t row = startRowAddress; row < endRowAddress; row += 8) { std::memcpy(localData, dataIdx, 8); result = this->writeScratchPad(row, localData); if(result != OneWireSlave::Success) { break; } result = this->readScratchPad(localData); if(result != OneWireSlave::Success) { break; } result = this->copyScratchPad(row, localData[2]); if(result != OneWireSlave::Success) { break; } dataIdx += 8; } } if(result == OneWireSlave::Success) { if(endOffset != 0) { result = this->readBlock(endRowAddress, localData, 8); if(result == OneWireSlave::Success) { std::memcpy(localData, dataIdx, endOffset); result = this->writeScratchPad(endRowAddress, localData); if(result == OneWireSlave::Success) { result = this->readScratchPad(localData); if(result == OneWireSlave::Success) { result = this->copyScratchPad(endRowAddress, localData[2]); } } } } } } return result; } //********************************************************************* OneWireSlave::CmdResult DS2431::readBlock(uint16_t targetAddress, uint8_t *data, uint8_t numBytes) { OneWireSlave::CmdResult result = OneWireSlave::OperationFailure; if((targetAddress + numBytes) <= 0x88) { OneWireMaster::CmdResult owmResult = selectDevice(); if(owmResult == OneWireMaster::Success) { uint8_t sendBlock[] = {READ_MEMORY, (targetAddress & 0xFF), ((targetAddress >> 8) & 0xFF)}; owmResult = master().OWWriteBlock(sendBlock, 3); if(owmResult == OneWireMaster::Success) { owmResult = master().OWReadBlock(data, numBytes); if(owmResult == OneWireMaster::Success) { result = OneWireSlave::Success; } } } } return result; }