AD7606 QT demo

[george]

ad7606.pro

QT       += core gui

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets charts

CONFIG += c++11

# You can make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
    main.cpp \
    mainwindow.cpp

HEADERS += \
    mainwindow.h

FORMS += \
    mainwindow.ui

TRANSLATIONS += \
    ad7606_zh_CN.ts
CONFIG += lrelease
CONFIG += embed_translations

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS += target

mainwindow.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QSplineSeries>
using namespace QtCharts;
QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();
    void setChart();
    int getValue(char *channel);
	int getScale();
	void timerEvent(QTimerEvent *e);

private slots:
    void on_pushButton_2_clicked();

    void on_pushButton_clicked();

private:
    Ui::MainWindow *ui;
    QSplineSeries *serials0;
    QSplineSeries *serials1;
    QSplineSeries *serials2;
    QSplineSeries *serials3;
    QSplineSeries *serials4;
    QSplineSeries *serials5;
    QSplineSeries *serials6;
    QSplineSeries *serials7;
    QChart        *chart;
	int scale;
	int timerid1;
	float value[8];
};
#endif // MAINWINDOW_H

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QtCharts>
#include <QtCharts/QChartView>
#include <QSplineSeries>
#include <QProcess>
#include <QString>
#include <QTimer>
#include <fcntl.h>
#include <unistd.h>

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    setChart();
}

MainWindow::~MainWindow()
{
    delete ui;
}
void MainWindow::setChart()
{
  scale = getScale();
  serials0 = new QtCharts::QSplineSeries();
  serials1 = new QtCharts::QSplineSeries();
  serials2 = new QtCharts::QSplineSeries();
  serials3 = new QtCharts::QSplineSeries();
  serials4 = new QtCharts::QSplineSeries();
  serials5 = new QtCharts::QSplineSeries();
  serials6 = new QtCharts::QSplineSeries();
  serials7 = new QtCharts::QSplineSeries();
  chart = new QChart();
  chart->addSeries(serials7);
  chart->createDefaultAxes();
  chart->axisX()->setRange(0, 99);
  chart->axisY()->setRange(-10, 10);
  chart->legend()->hide();
  ui->widget->setChart(chart);
}

int MainWindow::getValue(char *channel)
{
    int dev_fd,ret;
    char DEV_PATH[64];
    char value[5];
	QString str_data;
    sprintf(DEV_PATH,"/sys/bus/spi/devices/spi0.0/iio:device0/in_voltage%s_raw",channel);
    dev_fd = open(DEV_PATH,O_RDONLY);
    if(dev_fd == -1)
    {
        perror("open channel failed!\n");
        return -1;
    }
    if(read(dev_fd,value,5)<0)
    {
        perror("read channel failed!\n");
        return -1;
    }
    ::close(dev_fd);
	str_data = QString::fromLocal8Bit(value,5);
    ret = str_data.toInt();
    return ret;
}

int MainWindow::getScale()
{
    int dev_fd;
	int ret;
    char DEV_PATH[64];
    char value[5];
	QString str_data;
    sprintf(DEV_PATH,"/sys/bus/spi/devices/spi0.0/iio:device0/in_voltage_scale");
    dev_fd = open(DEV_PATH,O_RDONLY);
    if(dev_fd == -1)
    {
        perror("open scale failed!\n");
        return -1;
    }
    if(read(dev_fd,value,5)<0)
    {
        perror("read scale failed!\n");
        return -1;
    }
    ::close(dev_fd);
	str_data = QString::fromLocal8Bit(value,5);
    ret = str_data.toFloat()*1000;
    return ret;
}

void MainWindow::timerEvent(QTimerEvent *e)
{
	int i;
    QVector<QPointF> oldData = serials7->pointsVector();
    QVector<QPointF> data;
	if (oldData.size() < 100) {
        data = serials7->pointsVector();
	} 
	else {
		for (i = 1; i < oldData.size(); ++i) 
			{
				data.append(QPointF(i - 1 , oldData.at(i).y()));
			}
		}
	qint64 size = data.size();
	for(i = 0; i < 1; ++i){
		value[7] = getValue("7");
		data.append(QPointF(i + size, value[7]*scale/1000000));
		}
	serials7->replace(data);
}

void MainWindow::on_pushButton_2_clicked()
{
	serials7->clear();
    timerid1 = startTimer(1);
}


void MainWindow::on_pushButton_clicked()
{
	killTimer(timerid1);

}

source code ad7606.zip