hwapi::onCCWakeGpioChanged():

when switching cc-terminal off, send 0 to watch-file (watched by a
	filesystem watcher).
	when switching cc-terminal on, send 1 to watch-file (watched by a
	filesystem watcher).

include/hwapi.h

@@ -63,7 +63,8 @@ V4.0  6.9.2023: activating DC-Bootloader in slve-lib (SM)
 #include "shared_mem_buffer.h"
 #include "runProc.h"
 #include "interfaces.h"
-
+#include <QScopedPointer>
+#include <QFileSystemWatcher>
 
 /*
  * select Plugin Type here
@@ -98,7 +99,7 @@ V4.0  6.9.2023: activating DC-Bootloader in slve-lib (SM)
 //#define THIS_IS_CA_MASTER
 
 
-
+class QFileSystemWatcher;
 class QSharedMemory;
 class DownloadThread;
 class ReportingThread;
@@ -115,7 +116,11 @@ private:
     QSharedMemory *m_sharedMem;
     ReportingThread *m_reportingThread;
     DownloadThread *m_downloadThread;
-    //QTimer *hwapi_triggerBL;
+    QScopedPointer<QFileSystemWatcher> m_fileSystemWatcher;
+    QString m_watchedFile;
+
+private slots:
+    void onCCWakeGpioChanged(QString const &file);
 
 public:
     explicit hwapi(QObject *parent = nullptr);

src/hwapi.cpp

@@ -15,6 +15,8 @@
 #include <cstring>
 #include <QThread>
 #include <QDebug>
+#include <QFileSystemWatcher>
+#include <QSettings>
 
 
 static uint32_t hwapi_lastStartAmount;
@@ -35,6 +37,7 @@ hwapi::hwapi(QObject *parent) : QObject(parent)
     qCritical() << "    hwapi::hwapi() APP_EXTENDED_VERSION:" << APP_EXTENDED_VERSION;
     qCritical() << "hwapi::hwapi() APP_EXTENDED_VERSION_LIB:" << APP_EXTENDED_VERSION_LIB;
 
+    m_fileSystemWatcher.reset();
 
     // create or attach shared memory segment
     m_sharedMem = SharedMem::getShm(sizeof(SharedMem));
@@ -56,8 +59,21 @@ hwapi::hwapi(QObject *parent) : QObject(parent)
 #error "SLAVE LIB COMPILED INTO MASTER"
 #endif
 
-        myDatif = new T_datif(this);    // für die  CAslave-Lib auskommentieren!
+        QSettings settings("/opt/app/ATBAPP/ATBQT.ini", QSettings::IniFormat);
+        m_watchedFile = settings.value("AsyncPOS_CCPlugin/terminal_watch_file",
+                                       "/opt/app/ATBAPP/watch.txt").toString();
 
+        m_fileSystemWatcher.reset(new QFileSystemWatcher());
+        if (!m_fileSystemWatcher->addPath(m_watchedFile)) {
+            qCritical() << "cannot add path for" << m_watchedFile;
+        } else {
+            if (connect(m_fileSystemWatcher.get(), SIGNAL(fileChanged(QString const&)),
+                        this, SLOT(onCCWakeGpioChanged(QString const&)))) {
+                qCritical() << "connected file watcher with" << m_watchedFile;
+            }
+        }
+
+        myDatif = new T_datif(this);    // für die  CAslave-Lib auskommentieren!
 #endif
 
 #ifdef THIS_IS_CA_SLAVE
@@ -120,6 +136,44 @@ hwapi::hwapi(QObject *parent) : QObject(parent)
     connect(runProcess, SIGNAL(runProc_coinAttached()),                 this, SLOT(coinAttached()));
 }
 
+void hwapi::onCCWakeGpioChanged(QString const &fileName) {
+    if (fileName == m_watchedFile) {
+        QFile f(m_watchedFile);
+        if (f.open(QFile::ReadOnly | QFile::Text)) {
+            QTextStream stream(&f);
+            QString const &content = stream.readAll();
+            if (content.startsWith("0")) {
+                qCritical() << __func__ << ":" << __LINE__ << "switching terminal off...";
+                mod_switchWake(false);
+                mod_switchPower(false);
+                f.close();
+                f.setFileName(m_watchedFile);
+                // to turn off cc-terminal, the content must be "0"
+                if (f.open(QFile::WriteOnly | QIODevice::Truncate | QIODevice::Text)) {
+                    QTextStream s(&f);
+                    s << "switching terminal off";
+                }
+            } else
+            if (content.startsWith("1")) {
+                qCritical() << __func__ << ":" << __LINE__ << "switching terminal on...";
+                mod_switchPower(true);
+                mod_switchWake(true);
+                f.close();
+                f.setFileName(m_watchedFile);
+                // to turn on cc-terminal, the content must be "1"
+                if (f.open(QFile::WriteOnly | QIODevice::Truncate | QIODevice::Text)) {
+                    QTextStream s(&f);
+                    s << "switching terminal on";
+                }
+            } else {
+                qCritical() << "watched file contained" << content;
+            }
+        }
+    } else {
+        qCritical() << "ERROR watching the wrong file" << fileName;
+    }
+}
+
 void hwapi::hwapi_slotPayProc(void)
 {