一，头文件
#include <QSerialPort> //提供访问串口的功能
#include <QSerialPortInfo> //提供系统中存在的串口的信息
二，搜索串口
//搜索串口，并添加到选项上供使用者选择foreach(const QSerialPortInfo &Info,QSerialPortInfo ::availablePorts()){QSerialPort CurrentPort;CurrentPort.setPort(Info);if(CurrentPort.open(QIODevice::ReadWrite)){ui->comboBox_port->addItem(CurrentPort.portName());//插入串口的名字CurrentPort.close(); //先开再关，把串口名称先导入}}三，连接串口
CurrentUart->open(QIODevice::ReadWrite);四，读串口数据
QByteArry ReadBuf = CurrentUart->readAll();if(!ReadBuf.isEmpty())
{str += tr(ReadBuf);//???ui->plainTextEdit->appendPlainText(str);
}ReadBuf.clear();
五，写数据
QByteArray ArraySend = ui->plainTextEdit_2->toPlainText().toLatin1();CurrentUart->write(QByteArray::fromHex(ArraySend));六，关掉串口
CurrentUart->clear();
CurrentUart->close();七，源代码
#ifndef UARTDISPLAY_H
#define UARTDISPLAY_H
#include <QSerialPort> //提供访问串口的功能
#include <QSerialPortInfo> //提供系统中存在的串口的信息
#include <QWidget>
#include <QTimer>
#include <QTextEdit>
#include <QtDebug>
#include "linklist.h"
#include "datahandle.h"extern uint8_t SerialStatus;namespace Ui {
class Uartdisplay;
}class Uartdisplay : public QWidget
{Q_OBJECTpublic:explicit Uartdisplay(QWidget *parent = nullptr);~Uartdisplay();void uint8_to_charHex(uint8_t *data,uint16_t len,uint8_t *retbuf);void QString_to_charHex(QString *data,uint16_t len,QString *retbuf);void QByteArray_to_uint8hex(QByteArray *data,uint8_t *hexdata,uint16_t len);private slots:void on_pushButton_clicked();void Read_Data();void on_pushButton_2_clicked();void on_pushButton_3_clicked();void on_pushButton_4_clicked();void on_pushButton_5_clicked();private:Ui::Uartdisplay *ui;QSerialPort *CurrentUart = new QSerialPort();QTimer *TimerRead = new QTimer();QByteArray ReadBuf;QTextEdit *ReceiveInfo;
};#endif // UARTDISPLAY_H
#include "uartdisplay.h"
#include "ui_uartdisplay.h"#include <QSerialPort> //提供访问串口的功能
#include <QSerialPortInfo> //提供系统中存在的串口的信息
#include <QFileDialog>
#include <QDateTime>
#include <QMessageBox>uint8_t SerialStatus = 0;
extern Linklist link;Uartdisplay::Uartdisplay(QWidget *parent) :QWidget(parent),ui(new Ui::Uartdisplay)
{ui->setupUi(this);ui->pushButton->setEnabled(true);ui->pushButton_2->setEnabled(false);ui->checkBox->setCheckState(Qt::CheckState::Checked);//CheckBox默认状态ui->checkBox_2->setCheckState(Qt::CheckState::Checked);//CheckBox默认状态ui->comboBox_baudrate->addItem("9600");ui->comboBox_baudrate->addItem("19200");ui->comboBox_baudrate->addItem("38400");ui->comboBox_baudrate->addItem("57600");ui->comboBox_baudrate->addItem("115200");ui->comboBox_baudrate->setCurrentIndex(4);ui->comboBox_datarate->addItem("5");ui->comboBox_datarate->addItem("6");ui->comboBox_datarate->addItem("7");ui->comboBox_datarate->addItem("8");ui->comboBox_datarate->setCurrentIndex(3);ui->comboBox_parity->addItem("On");ui->comboBox_parity->addItem("Off");ui->comboBox_parity->setCurrentIndex(1);ui->comboBox_stopbit->addItem("1");ui->comboBox_stopbit->addItem("2");ui->comboBox_stopbit->setCurrentIndex(0);//搜索串口，并添加到选项上供使用者选择foreach(const QSerialPortInfo &Info,QSerialPortInfo ::availablePorts()){QSerialPort CurrentPort;CurrentPort.setPort(Info);if(CurrentPort.open(QIODevice::ReadWrite)){ui->comboBox_port->addItem(CurrentPort.portName());//插入串口的名字CurrentPort.close(); //先开再关，把串口名称先导入}}connect(TimerRead,SIGNAL(timeout()),this,SLOT(Read_Data()));}Uartdisplay::~Uartdisplay()
{delete ui;
}/*串口读数据*/
void Uartdisplay::Read_Data()
{//uint8_t revbuf[255];uint8_t TatolLen = 0,CRC = 0;uchar *revbuf;QString str;QDateTime CurrDate = QDateTime::currentDateTime();QString CurrDateTime = CurrDate.toString("[hh:mm:ss:zzz]");str += CurrDateTime+"收-> ";ReadBuf = CurrentUart->readAll();if(!ReadBuf.isEmpty()){if(ui->checkBox->checkState()) //HEX显示{QString str2 = QString::fromUtf8(ReadBuf.toHex());qDebug()<<"lenght : "<<str2.length();QString str3;QString_to_charHex(&str2,str2.length(),&str3);str+=str3;ui->plainTextEdit->appendPlainText(str);revbuf = (uchar*)ReadBuf.data();if(revbuf[0]==0xff){TatolLen = ReadBuf.length();CRC = datahandle.crc_u8(revbuf,TatolLen-2);if(revbuf[TatolLen-1] == 0xff )//&&CRC == revbuf[TatolLen-2]){qDebug()<<"recive data ok!!!";memcpy(RevData.data,revbuf,TatolLen);RevData.dataLen = TatolLen;if(revbuf[2] == 0x04){qDebug()<<"recive data bat!!!";qDebug("recive data ok:%x ,%x ,%x ,%x,%x ,%x ,%x ,%x,%d",RevData.data[0],RevData.data[1],RevData.data[2],RevData.data[3],RevData.data[4],RevData.data[5],RevData.data[6],RevData.data[7],TatolLen);link.insert(link.RevBatList,&RevData);}else{link.insert(link.RevmainwidgetList,&RevData);}}}}else{str += tr(ReadBuf);//???ui->plainTextEdit->appendPlainText(str);}}ReadBuf.clear();if(!link.list_is_empty(link.SendList)){uint8_t retbuf[1000];QString str;QDateTime CurrDate = QDateTime::currentDateTime();QString CurrDateTime = CurrDate.toString("[hh:mm:ss:zzz]");str += CurrDateTime+"发-> ";uint8_to_charHex(link.SendList->next->data.data,link.SendList->next->data.dataLen,retbuf);str+= QString(QByteArray((char*)retbuf,(link.SendList->next->data.dataLen)*3));ui->plainTextEdit->appendPlainText(str);QByteArray ArraySend = QByteArray::fromRawData((char*)link.SendList->next->data.data,link.SendList->next->data.dataLen); //char 转成QByteArrayCurrentUart->write(ArraySend);link.delete_node(&link.SendList);}}/*连接*/
void Uartdisplay::on_pushButton_clicked()
{QString tr;CurrentUart->setPortName(ui->comboBox_port->currentText());tr+="PortName : "+ui->comboBox_port->currentText()+" \r\n";switch(ui->comboBox_baudrate->currentIndex()){case 0:CurrentUart->setBaudRate(QSerialPort::Baud9600,QSerialPort::AllDirections);tr+="Baud : 9600 \r\n";break;case 1:CurrentUart->setBaudRate(QSerialPort::Baud19200,QSerialPort::AllDirections);tr+="Baud : 19200 \r\n";break;case 2:CurrentUart->setBaudRate(QSerialPort::Baud38400,QSerialPort::AllDirections);tr+="Baud : 38400 \r\n";break;case 3:CurrentUart->setBaudRate(QSerialPort::Baud57600,QSerialPort::AllDirections);tr+="Baud : 57600 \r\n";break;case 4:CurrentUart->setBaudRate(QSerialPort::Baud115200,QSerialPort::AllDirections);tr+="Baud : 115200 \r\n";break;default:break;}switch(ui->comboBox_datarate->currentIndex()){case 0:CurrentUart->setDataBits(QSerialPort::Data5);tr+="DataBits : 5 \r\n";break;case 1:CurrentUart->setDataBits(QSerialPort::Data6);tr+="DataBits : 6 \r\n";break;case 2:CurrentUart->setDataBits(QSerialPort::Data7);tr+="DataBits : 7 \r\n";break;case 3:CurrentUart->setDataBits(QSerialPort::Data8);tr+="DataBits : 8 \r\n";break;default:break;}switch(ui->comboBox_parity->currentIndex()){case 0:CurrentUart->setParity(QSerialPort::MarkParity);tr+="Parity : On \r\n";break;case 1:CurrentUart->setParity(QSerialPort::NoParity);tr+="Parity : Off \r\n";break;default:break;}switch(ui->comboBox_stopbit->currentIndex()){case 0:CurrentUart->setStopBits(QSerialPort::OneStop);tr+="StopBits : OneStop \r\n";break;case 1:CurrentUart->setStopBits(QSerialPort::TwoStop);tr+="StopBits : TwoStop \r\n";break;default:break;}CurrentUart->setFlowControl(QSerialPort::NoFlowControl);CurrentUart->open(QIODevice::ReadWrite);if(CurrentUart->isOpen()){ui->comboBox_port->setEnabled(false);ui->comboBox_baudrate->setEnabled(false);ui->comboBox_datarate->setEnabled(false);ui->comboBox_parity->setEnabled(false);ui->comboBox_stopbit->setEnabled(false);ui->pushButton->setEnabled(false);ui->pushButton_2->setEnabled(true);tr+="\r\n\r\nconnect uart successfull!!!\r\n\r\n";ui->plainTextEdit->setPlainText(tr);SerialStatus = 1;}else{ui->plainTextEdit->setPlainText("connect uart fail!!!");}TimerRead->start(500);
}/*断开连接*/
void Uartdisplay::on_pushButton_2_clicked()
{CurrentUart->clear();CurrentUart->close();//CurrentUart->deleteLater();ui->comboBox_port->setEnabled(true);ui->comboBox_baudrate->setEnabled(true);ui->comboBox_datarate->setEnabled(true);ui->comboBox_parity->setEnabled(true);ui->comboBox_stopbit->setEnabled(true);ui->pushButton->setEnabled(true);ui->pushButton_2->setEnabled(false);TimerRead->stop();
}/*清楚窗口*/
void Uartdisplay::on_pushButton_3_clicked()
{ui->plainTextEdit->clear();
}/*发送数据*/
void Uartdisplay::on_pushButton_4_clicked()
{QString str,str1,str2;QDateTime CurrDate = QDateTime::currentDateTime();QString CurrDateTime = CurrDate.toString("[hh:mm:ss:zzz]");str += CurrDateTime+"发-> ";str1 = ui->plainTextEdit_2->toPlainText();qDebug()<<"str1:"<<str1;if(ui->checkBox_2->checkState()) //HEX显示{QString_to_charHex(&str1,str1.length(),&str2);qDebug()<<"str2:"<<str2;str+= str2;ui->plainTextEdit->appendPlainText(str);QByteArray ArraySend = ui->plainTextEdit_2->toPlainText().toLatin1();CurrentUart->write(QByteArray::fromHex(ArraySend));}else{str+= str1;ui->plainTextEdit->appendPlainText(str);QByteArray ArraySend = ui->plainTextEdit_2->toPlainText().toLatin1();CurrentUart->write(ArraySend);}
}void Uartdisplay::uint8_to_charHex(uint8_t *data,uint16_t len,uint8_t *retbuf)
{for(uint8_t i=0;i<len;i++){if(((data[i]&0xf0)>>4)<=9){retbuf[i*3] = ((data[i]&0xf0)>>4)+'0';}else{retbuf[i*3] = ((data[i]&0xf0)>>4)+87;}if((data[i]&0x0f)<=9){retbuf[i*3+1] = (data[i]&0x0f)+'0';}else{retbuf[i*3+1] = (data[i]&0x0f)+87;}retbuf[i*3+2] = ' ';}
}void Uartdisplay::QString_to_charHex(QString *data,uint16_t len,QString *retbuf)
{uint16_t j = 0;for(uint16_t i=0;i<len;i++){(*retbuf)[i+j] = (*data)[i];if(i%2==1){j+=1;(*retbuf)[i+j] = ' ';}}
}void Uartdisplay::QByteArray_to_uint8hex(QByteArray *data,uint8_t *hexdata,uint16_t len)
{uint8_t Tempdata = 0;for(uint16_t i = 0;i<len;i++){if(data->data()[i]=='\0'){return;}Tempdata = Tempdata*0x10+(data->data()[i]-'0');if(i%2==1){hexdata[i/2] = Tempdata;Tempdata = 0;}}
}void Uartdisplay::on_pushButton_5_clicked()
{QString tragetpath =QFileDialog::getExistingDirectory(this, "选择存储目录","//",QFileDialog::ShowDirsOnly| QFileDialog::DontResolveSymlinks);//tragetpath.replace("\\","//");tragetpath.replace("/","//");QString text = ui->plainTextEdit->toPlainText();qDebug()<<tragetpath;QFile file(tragetpath+"//Uart_Log.txt");if(!file.open(QIODevice::Append|QIODevice::Text)) //append追加，不会覆盖之前的文件{QMessageBox::critical(this,"错误","文件打开失败，信息没有保存！","确定");return;}QTextStream in(&file);//写入in<<text;file.close();
}