Add gpio class

server/gpio/gpio.hpp

@@ -0,0 +1,55 @@
+#ifndef GPIO_HPP
+#define GPIO_HPP
+
+#include <QObject>
+#ifdef __aarch64__
+#include <gpiod.h>
+#else
+struct gpiod_line_request{};
+struct gpiod_request_config{};
+struct gpiod_line_settings{};
+struct gpiod_line_config{};
+struct gpiod_chip{};
+enum gpiod_line_value {
+	GPIOD_LINE_VALUE_ERROR = -1,
+	/**< Returned to indicate an error when reading the value. */
+	GPIOD_LINE_VALUE_INACTIVE = 0,
+	/**< Line is logically inactive. */
+	GPIOD_LINE_VALUE_ACTIVE = 1,
+	/**< Line is logically active. */
+};
+enum gpiod_line_direction {
+	GPIOD_LINE_DIRECTION_AS_IS = 1,
+	/**< Request the line(s), but don't change direction. */
+	GPIOD_LINE_DIRECTION_INPUT,
+	/**< Direction is input - for reading the value of an externally driven
+	 *   GPIO line. */
+	GPIOD_LINE_DIRECTION_OUTPUT,
+	/**< Direction is output - for driving the GPIO line. */
+};
+#endif
+
+class GPIO : public QObject {
+    Q_OBJECT
+  public:
+    enum Direction {
+        Input,
+        Output
+    };
+    explicit GPIO(Direction dir, uint8_t gpio, bool state = false, QObject* parent = nullptr);
+    void set_value(bool val);
+    bool value();
+
+  private:
+    struct gpiod_line_request *
+    request_output_line(const char *chip_path, unsigned int offset,
+                        enum gpiod_line_value value, const char *consumer);
+    struct gpiod_line_request *request_input_line(const char *chip_path,
+                                                        unsigned int offset,
+                                                        const char *consumer);
+
+    struct gpiod_line_request *m_request;
+    unsigned int m_offset;
+};
+
+#endif // GPIO_HPP