Implementation of 1-Wire with added Alarm Search Functionality
Dependents: Max32630_One_Wire_Interface
OneWire_Switches/DS2413/ds2413.cpp
- Committer:
- j3
- Date:
- 2016-04-13
- Revision:
- 54:08985bf69691
- Parent:
- 23:e8e403d61359
- Child:
- 56:be69bd88a3e3
File content as of revision 54:08985bf69691:
/******************************************************************//** * 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" //********************************************************************* Ds2413::Ds2413(OneWireMaster &owm): _owm(owm) { } //********************************************************************* Ds2413::CmdResult Ds2413::pio_access_read_chA(RomId &romId, uint8_t & val) { Ds2413::CmdResult result = OpFailure; result = pio_access_read(romId, val); val = (val & 0x01); return result; } //********************************************************************* Ds2413::CmdResult Ds2413::pio_access_read_chB(RomId &romId, uint8_t & val) { Ds2413::CmdResult result = OpFailure; result = pio_access_read(romId, val); val = ((val >> 2) & 0x01); return result; } //********************************************************************* Ds2413::CmdResult Ds2413::pio_access_write_chA(RomId &romId, uint8_t val) { Ds2413::CmdResult result = OpFailure; uint8_t local_val = 0; //read current state of PIO result = pio_access_read(romId, 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(romId, val); } return result; } //********************************************************************* Ds2413::CmdResult Ds2413::pio_access_write_chB(RomId &romId, uint8_t val) { Ds2413::CmdResult result = OpFailure; uint8_t local_val = 0; //read current state of PIO result = pio_access_read(romId, 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(romId, val); } return result; } //********************************************************************* Ds2413::CmdResult Ds2413::pio_access_write_chAB(RomId &romId, uint8_t val) { return pio_access_write(romId, ((0x03 & val) | 0xFC)); } //********************************************************************* Ds2413::CmdResult Ds2413::pio_access_read(RomId &romId, uint8_t & val) { Ds2413::CmdResult result = Ds2413::OpFailure; OneWireMaster::CmdResult ow_result = _owm.OWMatchROM(romId); if(ow_result == OneWireMaster::Success) { ow_result = _owm.OWWriteByte(Ds2413::PIO_ACCESS_READ); if(ow_result == OneWireMaster::Success) { ow_result = _owm.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(RomId & romId, uint8_t val) { static uint32_t cnt = 0; Ds2413::CmdResult result = Ds2413::OpFailure; OneWireMaster::CmdResult ow_result = _owm.OWMatchROM(romId); if(ow_result == OneWireMaster::Success) { uint8_t send_block[] = {Ds2413::PIO_ACCESS_WRITE, val, ~val}; ow_result = _owm.OWWriteBlock(send_block, 3); if(ow_result == OneWireMaster::Success) { uint8_t expected_status = ((0x01 & val) | ((0x01 & val) << 1) | ((0x02 & val) << 1) | ((0x02 & val) << 2)); //expected_status |= (~expected_status << 4); uint8_t rcv_block[2]; ow_result = _owm.OWReadBlock(rcv_block, 2); if(ow_result == OneWireMaster::Success) { printf("\nEntry %d", ++cnt); printf("\nval = 0x%2x", val); printf("\nexpected status = 0x%2x", expected_status); printf("\nrecv_block 0 = 0x%2x", rcv_block[0]); printf("\nrecv_block 1 = 0x%2x\n", rcv_block[1]); if((rcv_block[0] == 0xAA) && ((rcv_block[1] & 0x0F) == expected_status)) { printf("\nExit %d\n", cnt); result = Ds2413::Success; } } else { result = Ds2413::CommsReadError; } } else { result = Ds2413::CommsWriteError; } } return result; }