Implementation of 1-Wire with added Alarm Search Functionality
Dependents: Max32630_One_Wire_Interface
Diff: Slaves/Switches/DS2413/DS2413.cpp
- Revision:
- 86:2ce08ca58b9e
- Parent:
- 77:529edb329ee0
- Child:
- 94:d2dea35b25ea
diff -r 708b7be59fb2 -r 2ce08ca58b9e Slaves/Switches/DS2413/DS2413.cpp --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Slaves/Switches/DS2413/DS2413.cpp Wed Jun 15 15:00:06 2016 -0500 @@ -0,0 +1,200 @@ +/******************************************************************//** +* 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 "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::pio_access_read_chA(uint8_t & val) +{ + DS2413::CmdResult result = OpFailure; + + result = pio_access_read(val); + + val = (val & 0x01); + + return result; +} + +DS2413::CmdResult DS2413::pio_access_read_chB(uint8_t & val) +{ + DS2413::CmdResult result = OpFailure; + + result = pio_access_read(val); + + val = ((val >> 2) & 0x01); + + return result; +} + +DS2413::CmdResult DS2413::pio_access_write_chA(uint8_t val) +{ + DS2413::CmdResult result = OpFailure; + + uint8_t local_val = 0; + + //read current state of PIO + result = pio_access_read(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 = pio_access_write(val); + } + + return result; +} + +DS2413::CmdResult DS2413::pio_access_write_chB(uint8_t val) +{ + DS2413::CmdResult result = OpFailure; + + uint8_t local_val = 0; + + //read current state of PIO + result = pio_access_read(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 = pio_access_write(val); + } + + return result; +} + +DS2413::CmdResult DS2413::pio_access_write_chAB(uint8_t val) +{ + return pio_access_write((0x03 & val) | 0xFC); +} + +DS2413::CmdResult DS2413::pio_access_read(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::pio_access_write(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, ~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; +}