first re-commit.

SWPiGPIO.h

@@ -0,0 +1,162 @@
+/***************************************************************************
+
+    source::worx PiGPIO
+    Copyright © 2022 c.holzheuer
+    chris@sourceworx.org
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+***************************************************************************/
+
+
+#ifndef SWPIGPIO_H
+#define SWPIGPIO_H
+
+#include <QObject>
+
+class PiGPIOFactory;
+class PiGPIOLinFactory;
+class PiGPIOWinFactory;
+class PiGPIOWidget;
+
+
+
+
+#ifdef Q_OS_WIN
+
+// Fake4Win
+typedef void (*CBFuncEx_t)( int pi, unsigned user_gpio, unsigned level, uint32_t tick, void * userdata );
+
+extern int PI_INPUT;
+extern int PI_PUD_UP;
+extern int EITHER_EDGE;
+extern int PI_TIMEOUT;
+//int PI_TIMEOUT = 42;
+
+extern int set_mode(int,int,int);
+extern int set_pull_up_down(int,int,int);
+extern int set_glitch_filter(int,int,int);
+extern int callback_cancel(int);
+extern int callback_ex(int,unsigned,int,CBFuncEx_t,void*);
+extern int gpio_read(int,int);
+
+#endif  //Q_OS_WIN
+
+
+/**
+ * @brief @brief Prototypische Implementierung eines Wrappers für die 'pigpiod' library.
+ */
+
+class PiGPIO
+{
+
+public:
+
+    static PiGPIO& Instance()
+    {
+        static PiGPIO _Instance;  // Guaranteed to be destroyed.
+        return _Instance;         // Instantiated on first use.
+    }
+
+
+    PiGPIO( PiGPIO const& )       = delete;
+    void operator=(PiGPIO const&) = delete;
+
+    ~PiGPIO();
+
+    int PI;
+
+private:
+
+    PiGPIO();
+
+    bool _initCalled = false;
+
+};
+
+
+//---------------------------------------------------------------------
+
+/**
+
+             +---------+         +---------+      0
+             |         |         |         |
+   A         |         |         |         |
+             |         |         |         |
+   +---------+         +---------+         +----- 1
+
+       +---------+         +---------+            0
+       |         |         |         |
+   B   |         |         |         |
+       |         |         |         |
+   ----+         +---------+         +---------+  1
+
+*/
+
+/**
+ * @brief Implentiert die Anbindung eines RotaryDials (Dreh-Drück Regler)
+ * an die Benutzeroberfläche
+ *
+ * Version über den 'pigpiod' _ohne_ direkten Hardwarezugriff (welcher root-Rechte
+ * benötigen würde)
+ */
+
+class PiGRotaryDial : public QObject
+{
+    Q_OBJECT
+
+public:
+
+    explicit PiGRotaryDial( unsigned dialA, unsigned dialB, unsigned button, QObject* parent = nullptr );
+    virtual ~PiGRotaryDial();
+    void setGlitchFilter( int glitch );
+
+signals:
+
+    void clicked();
+    void deltaChanged( int value );
+
+protected:
+
+    void pulse( unsigned gpio, unsigned level );
+    void handleClick( unsigned level );
+    //void handlePulse( int value );
+
+    // Need a static callback to link with C.
+    static void PiGPIOPulse( int Pi, unsigned gpio, unsigned level, uint32_t tick, void *user );
+
+    /*
+    constexpr const static int Transits[16]=
+    {
+        // 0000 0001 0010 0011 0100 0101 0110 0111
+              0,  -1,   1,   0,   1,   0,   0,  -1,
+        // 1000 1001 1010 1011 1100 1101 1110 1111
+             -1,   0,   0,   1,   0,   1,  -1,   0
+    };
+    */
+
+
+    int         _Pi = -1;
+    unsigned    _dialA = -1;
+    unsigned    _dialB = -1;
+    unsigned    _button = -1;
+    int         _callbackIdA = -1;
+    int         _callbackIdB = -1;
+    int         _callbackIdC = -1;
+    int         _levA = -1;
+    int         _levB = -1;
+    int         _oldState = -1;
+    int         _glitch = -1;
+    int         _step = 0;
+    int         _oldStep = 0;
+
+    bool        _pressed = false;
+
+
+};
+
+
+#endif // SWPIGPIO_H