CPP文件：#include "dialog.h"
#include "ui_dialog.h"
#include <QSerialPortInfo>
#include <QSerialPort>
#include <QList>
#include <QDebug>
#include <QTextEdit>
Dialog::Dialog(QWidget *parent)
: QDialog(parent)
, ui(new Ui::Dialog)
{
ui->setupUi(this);
mSerialPort = new QSerialPort; //创建一个串口对象
mIsOpen = false; //初始化按钮状态标志位
ui->btn_send->setEnabled(mIsOpen);
//识别系统的所有可用串口号，并添加到下拉列表中
QList<QSerialPortInfo> serialPortInfo = QSerialPortInfo::availablePorts();
int count = serialPortInfo.count();
for(int i = 0;i < count;i++)
{
ui->Cboxport->addItem(serialPortInfo.at(i).portName());
}
//等待一个触发信号，接收串口数据
connect(mSerialPort, SIGNAL(readyRead()), this, SLOT(on_SerialPort_readyRead()));
}
Dialog::~Dialog()
{
delete ui;
}
bool Dialog::getSerialPortConfig() //配置串口
{
//获取串口配置
mPortName = ui->Cboxport->currentText();
mBaudRate = ui->Cboxboudrate->currentText();
mParity = ui->Cboxparity->currentText();
mDataBits = ui->Cboxdatabits->currentText();
mStopBits = ui->Cboxstopbits->currentText();
//设置串口
//串口号
mSerialPort->setPortName(mPortName);
//波特率
if("115200" == mBaudRate)
{
mSerialPort->setBaudRate(QSerialPort::Baud115200);
}
else
{
mSerialPort->setBaudRate(QSerialPort::Baud9600);
}
//校验位
if("EVEN" == mParity)
{
mSerialPort->setParity(QSerialPort::EvenParity);
}
else if("ODD" == mParity)
{
mSerialPort->setParity(QSerialPort::OddParity);
}
else
{
mSerialPort->setParity(QSerialPort::NoParity);
}
//数据位
if("5" == mDataBits)
{
mSerialPort->setDataBits(QSerialPort::Data5);
}
else if("6" == mDataBits)
{
mSerialPort->setDataBits(QSerialPort::Data6);
}
else if("7" == mDataBits)
{
mSerialPort->setDataBits(QSerialPort::Data7);
}
else
{
mSerialPort->setDataBits(QSerialPort::Data8);
}
//停止位
if("1.5" == mStopBits)
{
mSerialPort->setStopBits(QSerialPort::OneAndHalfStop);
}
if("2" == mStopBits)
{
mSerialPort->setStopBits(QSerialPort::TwoStop);
}
else
{
mSerialPort->setStopBits(QSerialPort::OneStop);
}
qDebug() << "配置";
return mSerialPort->open(QSerialPort::ReadWrite);
}
void Dialog::on_btn_open_clicked() //打开关闭按钮状态
{
if(true == mIsOpen)
{
//当前已经打开了串口，点击后将按钮更新为关闭状态
mSerialPort->close();
ui->btn_open->setText("打开");
mIsOpen = false;
//此时可以配置串口
ui->Cboxport->setEnabled(true);
ui->Cboxboudrate->setEnabled(true);
ui->Cboxparity->setEnabled(true);
ui->Cboxdatabits->setEnabled(true);
ui->Cboxstopbits->setEnabled(true);
ui->btn_send->setEnabled(mIsOpen);
qDebug() << "关闭";
}
else
{
//当前处于关闭串口状态，打开前需要配置串口
//getSerialPortConfig();
if(true == getSerialPortConfig())
{
mIsOpen = true;
ui->btn_open->setText("关闭");
qDebug() << "成功打开串口" << mPortName;
ui->Cboxport->setEnabled(false);
ui->Cboxboudrate->setEnabled(false);
ui->Cboxparity->setEnabled(false);
ui->Cboxdatabits->setEnabled(false);
ui->Cboxstopbits->setEnabled(false);
ui->btn_send->setEnabled(mIsOpen);
}
// else
// {
// mIsOpen = false;
// }
}
}
void Dialog::on_btn_send_clicked() //发送按钮
{
if(true == mIsOpen)
{
//mSerialPort->write(ui->textEdit_send->toPlainText().toLatin1());// toPlainText(将文本编辑的文本转换为纯文本)
//mSerialPort->write(ui->textEdit_send->toPlainText().toStdString().c_str());
//注意：write函数的传递参数是QString，先转换为C++标准的string，再转为char型
QString str = ui->textEdit_send->toPlainText();
int len = str.length();
if(len%2 == 1)
{
str = str.insert(len - 1, '0');
}
QByteArray senddata; //写入编辑框的数据
StringToHex(str,senddata);
int length = senddata.length(); //在帧尾追加STM32的关键帧
senddata[length + 1] = 0x0d;
senddata[length + 2] = 0x0a;
mSerialPort->write(senddata);
}
}
void Dialog::on_SerialPort_readyRead() //读取串口数据
{
if(true == mIsOpen)
{
QByteArray recvData = mSerialPort->readAll();
//ui->textEdit_Recv->setPlainText(QString(recvData)); //显示内容每次会被覆盖
ui->textEdit_Recv->append(QString(recvData));
qDebug() << "正在接收数据";
}
}
void Dialog::StringToHex(QString str, QByteArray &senddata) //字符串转换为十六进制数据0-F
{
int hexdata,lowhexdata;
int hexdatalen = 0;
int len = str.length();
senddata.resize(len/2);
char lstr,hstr;
for(int i=0; i<len; )
{
//char lstr,
hstr=str[i].toLatin1();
if(hstr == ' ')
{
i++;
continue;
}
i++;
if(i >= len)
break;
lstr = str[i].toLatin1();
hexdata = ConvertHexChar(hstr);
lowhexdata = ConvertHexChar(lstr);
if((hexdata == 16) || (lowhexdata == 16))
break;
else
hexdata = hexdata*16+lowhexdata;
i++;
senddata[hexdatalen] = (char)hexdata;
hexdatalen++;
}
senddata.resize(hexdatalen);
}
char Dialog::ConvertHexChar(char ch)
{
if((ch >= '0') && (ch <= '9'))
return ch-0x30;
else if((ch >= 'A') && (ch <= 'F'))
return ch-'A'+10;
else if((ch >= 'a') && (ch <= 'f'))
return ch-'a'+10;
else return ch-ch;//不在0-f范围内的会发送成0
}
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