TrainCamp_lipengpeng_Modbus/mymodbus.cpp

#include "mymodbus.h"


MyModbus::MyModbus()
{
}

void MyModbus::Set(quint16 stationAddress, quint16 functionCode, quint16 startAdress, quint16 length)
{
    this->stationAddress = stationAddress;
    this->functionCode = functionCode;
    this->startAdress = startAdress;
    this->length = length;

}

void MyModbus::ReadColiAndReg()
{
    sendCommand.clear();
    sendCommand.append(stationAddress%256);
    sendCommand.append(functionCode%256);
    sendCommand.append(startAdress/256);
    sendCommand.append(startAdress%256);
    sendCommand.append(length/256);
    sendCommand.append(length%256);
    quint16 temp = CalculateCrc(sendCommand);
    sendCommand.append(temp%256);
    sendCommand.append(temp/256);
}

void MyModbus::WriteCoil(QVector<bool> &coils)
{
    quint16 coilCount = coils.size();
    int byteCount = (coilCount + 7) / 8;

    sendCommand.clear();
    sendCommand.append(stationAddress%256);
    sendCommand.append(0x0f);
    sendCommand.append(startAdress/256);
    sendCommand.append(startAdress%256);
    sendCommand.append(length/256);
    sendCommand.append(length%256);
    sendCommand.append(byteCount);
    for (int i = 0; i < byteCount; ++i)
    {
        quint8 byte = 0;
        for (int j = 0; j < 8; ++j)
        {
            int bitIndex = i * 8 + j;
            if (bitIndex < coils.size() && coils[bitIndex])
                byte |= (1 << j);
        }
        sendCommand.append(static_cast<char>(byte));
    }

    quint16 temp = CalculateCrc(sendCommand);  //计算crc
    sendCommand.append(temp%256);  //加入计算的crc值
    sendCommand.append(temp/256);
}

void MyModbus::WriteRegister(QVector<quint16> &values)
{
    sendCommand.clear();
    sendCommand.append(stationAddress%256);
    sendCommand.append(0x10);
    sendCommand.append(startAdress/256);
    sendCommand.append(startAdress%256);
    sendCommand.append(length/256);
    sendCommand.append(length%256);
    sendCommand.append(static_cast<char>(values.size() * 2));
    for (quint16 v : values)
    {
        sendCommand.append(static_cast<char>((v >> 8) & 0xFF));
        sendCommand.append(static_cast<char>(v & 0xFF));
    }
    quint16 temp = CalculateCrc(sendCommand);  //计算crc
    sendCommand.append(temp%256);  //加入计算的crc值
    sendCommand.append(temp/256);
}

QByteArray MyModbus::SendCommand()
{
    return sendCommand;
}

QByteArray MyModbus::Receive(const QByteArray &revMessage)
{
    receive.clear();
    if (CrcCheck(revMessage))
    {
        this->receive = revMessage;
    }
    return receive;
}

int MyModbus::ErrorCheck()
{
    if ((receive.at(1) & 0x80) == 0x80)
    {
        // MODBUS异常响应结构：地址 | 功能码+0x80 | 异常码 | CRC
        quint8 exCode = receive.at(2);
        return exCode;
    }
    else
    {
        return 0;
    }
}

QVector<bool> MyModbus::AnalReadCoil()
{
    quint8 byteCount = static_cast<quint8>(receive[2]);
    QVector<bool> coil;

    for (int byteIndex = 0; byteIndex < byteCount; byteIndex++)
    {
        quint8 byteValue = static_cast<quint8>(receive[3 + byteIndex]);

        // 解析每个字节的8个位
        for (int bitIndex = 0; bitIndex < 8; bitIndex++)
        {
            int coilIndex = byteIndex * 8 + bitIndex;
            if (coilIndex < length)
            {
                bool state = byteValue & (1 << bitIndex);
                coil.append(state);
            }
        }
    }
    return coil;
}

QVector<quint16> MyModbus::AnalReadReg()
{
    int byteCount = receive.at(2);
    QByteArray data = receive.mid(3, byteCount);

    QVector<quint16> registers;
    for (int i = 0; i < data.size(); i += 2)
    {
        quint16 value = (static_cast<quint8>(data[i]) << 8) | static_cast<quint8>(data[i+1]);
        registers.append(value);
    }

    return registers;
}