added new linux folder

linux/gpio/GpioCookie.h

@@ -0,0 +1,76 @@
+#ifndef SAM9G20_COMIF_COOKIES_GPIO_COOKIE_H_
+#define SAM9G20_COMIF_COOKIES_GPIO_COOKIE_H_
+
+#include "GpioIF.h"
+#include <fsfw/devicehandlers/CookieIF.h>
+#include <fsfw/returnvalues/HasReturnvaluesIF.h>
+#include <string>
+#include <unordered_map>
+
+namespace gpio {
+enum Direction {
+    IN = 0,
+    OUT = 1
+};
+}
+
+/**
+ * @brief	Struct containing information about the GPIO to use. This is
+ * 			required by the libgpiod to access and drive a GPIO.
+ * @param chipname	String of the chipname specifying the group which contains
+ *  	  			the GPIO to access. E.g. gpiochip0. To detect names of
+ *  	  			GPIO groups run gpiodetect on the linux command line.
+ * @param lineNum	The offset of the GPIO within the GPIO group.
+ * @param consumer	Name of the consumer. Simply a description of the GPIO configuration.
+ * @param direction Specifies whether the GPIO should be used as in- or output.
+ * @param initValue Defines the initial state of the GPIO when configured as output. Only required
+ *                  for output GPIOs.
+ * @param lineHandle    The handle returned by gpiod_chip_get_line will be later written to this
+ *                      pointer.
+ */
+typedef struct GpioConfig {
+    GpioConfig(std::string chipname_, int lineNum_, std::string consumer_,
+            gpio::Direction direction_, int initValue_) :
+                chipname(chipname_), lineNum(lineNum_), consumer(consumer_), direction(direction_),
+                initValue(initValue_) {
+    }
+    std::string chipname;
+    int lineNum;
+    std::string consumer;
+    gpio::Direction direction;
+    int initValue;
+    struct gpiod_line* lineHandle = nullptr;
+} GpioConfig_t;
+using GpioMap = std::unordered_map<gpioId_t, GpioConfig_t>;
+using GpioMapIter = GpioMap::iterator;
+
+/**
+ * @brief   Cookie for the GpioIF. Allows the GpioIF to determine which
+ * 			GPIOs to initialize and whether they should be configured as in- or
+ * 			output.
+ * @details	One GpioCookie can hold multiple GPIO configurations. To add a new
+ * 			GPIO configuration to a GpioCookie use the GpioCookie::addGpio
+ * 			function.
+ *
+ * @author 	J. Meier
+ */
+class GpioCookie: public CookieIF {
+public:
+
+    GpioCookie();
+
+    virtual ~GpioCookie();
+
+    void addGpio(gpioId_t gpioId, GpioConfig_t gpioConfig);
+    /**
+     * @brief	Get map with registered GPIOs.
+     */
+    GpioMap getGpioMap() const;
+
+private:
+
+    GpioMap gpioMap;
+    GpioMapIter gpioMapIter;
+};
+
+#endif