Implementation of 1-Wire with added Alarm Search Functionality
Dependents: Max32630_One_Wire_Interface
Masters/DS248x/DS2482EightChannel/DS2482EightChannel.cpp
- Committer:
- j3
- Date:
- 2016-08-02
- Revision:
- 104:3f48daed532b
- Parent:
- 92:aa40c49b8563
- Child:
- 139:f0e0a7976846
File content as of revision 104:3f48daed532b:
/********************************************************************** * 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 "Masters/DS248x/DS2482EightChannel/DS2482EightChannel.h" using OneWire::OneWireMaster; using OneWire::DS2482EightChannel; //********************************************************************* DS2482EightChannel::DS2482EightChannel(mbed::I2C & i2c_bus, uint8_t adrs) :DS248x(i2c_bus, adrs) { } //********************************************************************* DS2482EightChannel::DS2482EightChannel(mbed::I2C & i2c_bus, I2CAddress adrs) :DS248x(i2c_bus, adrs) { } //********************************************************************* OneWireMaster::CmdResult DS2482EightChannel::selectChannel(uint8_t channel) { OneWireMaster::CmdResult result; uint8_t ch, ch_read; // Channel Select (Case A) // S AD,0 [A] CHSL [A] CC [A] Sr AD,1 [A] [RR] A\ P // [] indicates from slave // CC channel value // RR channel read back switch (channel) { default: case 0: ch = 0xF0; ch_read = 0xB8; break; case 1: ch = 0xE1; ch_read = 0xB1; break; case 2: ch = 0xD2; ch_read = 0xAA; break; case 3: ch = 0xC3; ch_read = 0xA3; break; case 4: ch = 0xB4; ch_read = 0x9C; break; case 5: ch = 0xA5; ch_read = 0x95; break; case 6: ch = 0x96; ch_read = 0x8E; break; case 7: ch = 0x87; ch_read = 0x87; break; }; result = sendCommand(ChannelSelectCmd, ch); if (result == OneWireMaster::Success) { result = readRegister(ChannelSelectReg, ch, true); if (result == OneWireMaster::Success) { // check for failure due to incorrect read back of channel if (ch != ch_read) { result = OneWireMaster::OperationFailure; } } } return result; }