added gpio read function

test/testtasks/CMakeLists.txt

@@ -0,0 +1,8 @@
+target_sources(${TARGET_NAME} PUBLIC
+	LibgpioTest.cpp
+	TestTask.cpp
+)
+
+target_include_directories(${TARGET_NAME} PUBLIC
+	${CMAKE_CURRENT_SOURCE_DIR}
+)

test/testtasks/LibgpioTest.cpp

@@ -0,0 +1,35 @@
+#include "LibgpioTest.h"
+#include "devices/gpioIds.h"
+#include <fsfw/serviceinterface/ServiceInterfaceStream.h>
+#include <fsfw/objectmanager/ObjectManagerIF.h>
+
+LibgpioTest::LibgpioTest(object_id_t objectId, object_id_t gpioIfobjectId, GpioCookie* gpioCookie) :
+        TestTask(objectId) {
+
+    gpioInterface = objectManager->get<GpioIF>(gpioIfobjectId);
+    if (gpioInterface == nullptr) {
+        sif::error << "LibgpioTest::LibgpioTest: Invalid Gpio interface." << std::endl;
+    }
+    gpioInterface->initialize(gpioCookie);
+}
+
+LibgpioTest::~LibgpioTest() {
+}
+
+ReturnValue_t LibgpioTest::performPeriodicAction() {
+    int gpioState;
+    ReturnValue_t result;
+
+    result = gpioInterface->readGpio(gpioIds::Test_ID, &gpioState);
+    if (result != RETURN_OK) {
+        sif::debug << "LibgpioTest::performPeriodicAction: Failed to read gpio "
+                << std::endl;
+        return RETURN_FAILED;
+    }
+    else {
+        sif::debug << "LibgpioTest::performPeriodicAction: MIO 0 state = " << gpioState
+                << std::endl;
+    }
+    return RETURN_OK;
+}
+

test/testtasks/LibgpioTest.h

@@ -0,0 +1,25 @@
+#ifndef TEST_TESTTASKS_LIBGPIOTEST_H_
+#define TEST_TESTTASKS_LIBGPIOTEST_H_
+
+#include "TestTask.h"
+#include "GpioIF.h"
+#include "GpioCookie.h"
+#include <fsfw/objectmanager/SystemObject.h>
+
+/**
+ * @brief   Test for the GPIO read implementation of the LinuxLibgpioIF.
+ * @author  J. Meier
+ */
+class LibgpioTest: public TestTask {
+public:
+    LibgpioTest(object_id_t objectId, object_id_t gpioIfobjectId, GpioCookie* gpioCookie);
+    virtual ~LibgpioTest();
+
+protected:
+    virtual ReturnValue_t performPeriodicAction() override;
+
+private:
+    GpioIF* gpioInterface;
+};
+
+#endif /* TEST_TESTTASKS_LIBGPIOTEST_H_ */