Implementation of 1-Wire with added Alarm Search Functionality
Dependents: Max32630_One_Wire_Interface
Slaves/Switches/DS2413/DS2413.cpp
- Committer:
- mfruge
- Date:
- 2019-08-13
- Revision:
- 142:85b71cfd617e
- Parent:
- 120:200109b73e3c
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/Switches/DS2413/DS2413.h" using OneWire::DS2413; using OneWire::OneWireMaster; enum DS2413_CMDS { PIO_ACCESS_READ = 0xF5, PIO_ACCESS_WRITE = 0x5A }; enum DS2413_PIO { PIOA, PIOB, PIOAB }; DS2413::DS2413(RandomAccessRomIterator &selector) : OneWireSlave(selector) { } DS2413::CmdResult DS2413::pioAccessReadChA(uint8_t & val) { DS2413::CmdResult result = OpFailure; result = pioAccessRead(val); val = (val & 0x01); return result; } DS2413::CmdResult DS2413::pioAccessReadChB(uint8_t & val) { DS2413::CmdResult result = OpFailure; result = pioAccessRead(val); val = ((val >> 2) & 0x01); return result; } DS2413::CmdResult DS2413::pioAccessWriteChA(uint8_t val) { DS2413::CmdResult result = OpFailure; uint8_t local_val = 0; //read current state of PIO result = pioAccessRead(local_val); if (result == DS2413::Success) { //modify //current state of pioB OR //desired state of pioA OR //bits[7:2] should all be 1, per datasheet val = (0xFC | (((local_val >> 1) & 0x02) | (0x01 & val))); //write, bit[1:0] new state of pio result = pioAccessWrite(val); } return result; } DS2413::CmdResult DS2413::pioAccessWriteChB(uint8_t val) { DS2413::CmdResult result = OpFailure; uint8_t local_val = 0; //read current state of PIO result = pioAccessRead(local_val); if (result == DS2413::Success) { //modify //current state of pioA OR //desired state of pioB OR //bits[7:2] should all be 1, per datasheet val = (0xFC | ((local_val & 0x01) | (0x02 & (val << 1)))); //write, bit[1:0] new state of pio result = pioAccessWrite(val); } return result; } DS2413::CmdResult DS2413::pioAccessWriteChAB(uint8_t val) { return pioAccessWrite((0x03 & val) | 0xFC); } DS2413::CmdResult DS2413::pioAccessRead(uint8_t & val) { DS2413::CmdResult result = DS2413::OpFailure; OneWireMaster::CmdResult ow_result = selectDevice(); if (ow_result == OneWireMaster::Success) { ow_result = master().OWWriteByte(PIO_ACCESS_READ); if (ow_result == OneWireMaster::Success) { ow_result = master().OWReadByte(val); if (ow_result == OneWireMaster::Success) { result = DS2413::Success; } else { result = DS2413::CommsReadError; } } else { result = DS2413::CommsWriteError; } } return result; } DS2413::CmdResult DS2413::pioAccessWrite(uint8_t val) { DS2413::CmdResult result = DS2413::OpFailure; OneWireMaster::CmdResult ow_result = selectDevice(); if (ow_result == OneWireMaster::Success) { uint8_t send_block[] = { PIO_ACCESS_WRITE, val, static_cast<uint8_t>(~val) }; ow_result = master().OWWriteBlock(send_block, 3); if (ow_result == OneWireMaster::Success) { uint8_t expected_status = ((0x01 & val) | ((0x01 & val) << 1) | ((0x02 & val) << 1) | ((0x02 & val) << 2)); uint8_t rcv_block[2]; ow_result = master().OWReadBlock(rcv_block, 2); if (ow_result == OneWireMaster::Success) { if ((rcv_block[0] == 0xAA) && ((rcv_block[1] & 0x0F) == expected_status)) { result = DS2413::Success; } } else { result = DS2413::CommsReadError; } } else { result = DS2413::CommsWriteError; } } return result; }