File content as of revision 12:7eb41621ba22:

/*******************************************************************************
* Copyright (C) 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 "Error.hpp"
#include "OneWireMaster.hpp"

#define TRY MaximInterfaceCore_TRY
#define TRY_VALUE MaximInterfaceCore_TRY_VALUE

namespace MaximInterfaceCore {

static const int maxBitNum = 7;

Result<void> OneWireMaster::writeByteSetLevel(uint_least8_t sendByte,
                                              Level afterLevel) {
  for (int bitNum = 0; bitNum <= maxBitNum; ++bitNum) {
    TRY(writeBitSetLevel(((sendByte >> bitNum) & 1) == 1,
                         (bitNum == maxBitNum) ? afterLevel : NormalLevel));
  }
  return none;
}

Result<uint_least8_t> OneWireMaster::readByteSetLevel(Level afterLevel) {
  uint_least8_t recvByte = 0;
  for (int bitNum = 0; bitNum <= maxBitNum; ++bitNum) {
    bool recvBit;
    TRY_VALUE(recvBit, readBitSetLevel((bitNum == maxBitNum) ? afterLevel
                                                             : NormalLevel));
    if (recvBit) {
      recvByte |= (1 << bitNum);
    }
  }
  return recvByte;
}

Result<void> OneWireMaster::writeBlock(span<const uint_least8_t> sendBuf) {
  for (span<const uint_least8_t>::index_type i = 0; i < sendBuf.size(); ++i) {
    TRY(writeByte(sendBuf[i]));
  }
  return none;
}

Result<void> OneWireMaster::readBlock(span<uint_least8_t> recvBuf) {
  for (span<uint_least8_t>::index_type i = 0; i < recvBuf.size(); ++i) {
    TRY_VALUE(recvBuf[i], readByte());
  }
  return none;
}

Result<OneWireMaster::TripletData> OneWireMaster::triplet(bool sendBit) {
  TripletData data;
  TRY_VALUE(data.readBit, readBit());
  TRY_VALUE(data.readBitComplement, readBit());
  if (data.readBit) {
    data.writeBit = 1;
  } else if (data.readBitComplement) {
    data.writeBit = 0;
  } else {
    data.writeBit = sendBit;
  }
  TRY(writeBit(data.writeBit));
  return data;
}

const error_category & OneWireMaster::errorCategory() {
  static class : public error_category {
  public:
    virtual const char * name() const {
      return "MaximInterfaceCore.OneWireMaster";
    }

    virtual std::string message(int condition) const {
      switch (condition) {
      case NoSlaveError:
        return "No Slave Error";

      case ShortDetectedError:
        return "Short Detected Error";

      case InvalidSpeedError:
        return "Invalid Speed Error";

      case InvalidLevelError:
        return "Invalid Level Error";
      }
      return defaultErrorMessage(condition);
    }
  } instance;
  return instance;
}

} // namespace MaximInterfaceCore