62 lines
2.2 KiB
C++
62 lines
2.2 KiB
C++
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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*
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* Copyright 2013 - 2021, nymea GmbH
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* Contact: contact@nymea.io
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*
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* This file is part of nymea.
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* This project including source code and documentation is protected by
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* copyright law, and remains the property of nymea GmbH. All rights, including
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* reproduction, publication, editing and translation, are reserved. The use of
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* this project is subject to the terms of a license agreement to be concluded
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* with nymea GmbH in accordance with the terms of use of nymea GmbH, available
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* under https://nymea.io/license
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*
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* GNU Lesser General Public License Usage
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* Alternatively, this project may be redistributed and/or modified under the
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* terms of the GNU Lesser General Public License as published by the Free
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* Software Foundation; version 3. This project is distributed in the hope that
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* it will be useful, but WITHOUT ANY WARRANTY; without even the implied
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this project. If not, see <https://www.gnu.org/licenses/>.
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*
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* For any further details and any questions please contact us under
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* contact@nymea.io or see our FAQ/Licensing Information on
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* https://nymea.io/license/faq
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*
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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#include "modbushelpers.h"
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float ModbusHelpers::convertRegisterToFloat(const quint16 *reg) {
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float result = 0.0;
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if (reg != nullptr) {
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/* low-order byte is sent first, so swap order */
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quint32 tmp = 0;
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tmp |= ((quint32)(reg[1]) << 16) & 0xFFFF0000;
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tmp |= reg[0];
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/* copy value over to float variable without any conversion */
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/* needs to be done with char * to avoid pedantic compiler errors */
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memcpy((char *)&result, (char *)&tmp, sizeof(result));
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}
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return result;
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}
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QVector<quint16> ModbusHelpers::convertFloatToRegister(float value)
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{
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quint32 tmp = 0;
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memcpy((char *)&tmp, (char *)&value, sizeof(value));
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QVector<quint16> reg;
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reg.append((quint16)(tmp));
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reg.append((quint16)((tmp & 0xFFFF0000) >> 16));
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return reg;
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}
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