File content as of revision 7:9cd16581b578:

/*******************************************************************************
* Copyright (C) 2017 Maxim Integrated Products, Inc., All Rights Reserved.
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* OTHER DEALINGS IN THE SOFTWARE.
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* Products, Inc. Branding Policy.
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#include <MaximInterfaceCore/Error.hpp>
#include <MaximInterfaceCore/OneWireMaster.hpp>
#include "DS2413.hpp"

namespace MaximInterfaceDevices {

using namespace Core;

error_code DS2413::readStatus(Status & status) const {
  uint_least8_t val;
  const error_code result = pioAccessRead(val);
  if (!result) {
    status = val;
  }
  return result;
}

error_code DS2413::writeOutputState(bool pioAState, bool pioBState) {
  uint_least8_t val = 0xFC;
  if (pioAState) {
    val |= 0x1;
  }
  if (pioBState) {
    val |= 0x2;
  }
  return pioAccessWrite(val);
}

error_code DS2413::pioAccessRead(uint_least8_t & val) const {
  error_code result = selectRom(*master);
  if (!result) {
    result = master->writeByte(0xF5);
    if (!result) {
      result = master->readByte(val);
      if (!result && (val != ((val ^ 0xF0) >> 4))) {
        result = make_error_code(CommunicationError);
      }
    }
  }
  return result;
}

error_code DS2413::pioAccessWrite(uint_least8_t val) {
  error_code result = selectRom(*master);
  if (!result) {
    uint_least8_t block[] = {0x5A, val, static_cast<uint_least8_t>(val ^ 0xFF)};
    result = master->writeBlock(block);
    if (!result) {
      result = master->readByte(block[0]);
      if (!result && block[0] != 0xAA) {
        result = make_error_code(CommunicationError);
      }
    }
  }
  return result;
}

const error_category & DS2413::errorCategory() {
  static class : public error_category {
  public:
    virtual const char * name() const { return "DS2413"; }

    virtual std::string message(int condition) const {
      switch (condition) {
      case CommunicationError:
        return "Communication Error";
      }
      return defaultErrorMessage(condition);
    }
  } instance;
  return instance;
}

error_code writePioAOutputState(DS2413 & ds2413, bool pioAState) {
  DS2413::Status status;
  error_code result = ds2413.readStatus(status);
  if (!result && pioAState != status[DS2413::PioAOutputState]) {
    result =
        ds2413.writeOutputState(pioAState, status[DS2413::PioBOutputState]);
  }
  return result;
}

error_code writePioBOutputState(DS2413 & ds2413, bool pioBState) {
  DS2413::Status status;
  error_code result = ds2413.readStatus(status);
  if (!result && pioBState != status[DS2413::PioBOutputState]) {
    result =
        ds2413.writeOutputState(status[DS2413::PioAOutputState], pioBState);
  }
  return result;
}

} // namespace MaximInterfaceDevices