Adding Code for freeRTOS

osal/FreeRTOS/Timekeeper.cpp

@@ -0,0 +1,42 @@
+#include "Timekeeper.h"
+#include <FreeRTOSConfig.h>
+
+Timekeeper::Timekeeper() :
+		offset( { 0, 0 }) {
+	// TODO Auto-generated constructor stub
+
+}
+
+Timekeeper * Timekeeper::myinstance = NULL;
+
+const timeval& Timekeeper::getOffset() const {
+	return offset;
+}
+
+Timekeeper* Timekeeper::instance() {
+	if (myinstance == NULL) {
+		myinstance = new Timekeeper();
+	}
+	return myinstance;
+}
+
+void Timekeeper::setOffset(const timeval& offset) {
+	this->offset = offset;
+}
+
+Timekeeper::~Timekeeper() {
+	// TODO Auto-generated destructor stub
+}
+
+timeval Timekeeper::ticksToTimeval(TickType_t ticks) {
+	timeval uptime;
+	uptime.tv_sec = ticks / configTICK_RATE_HZ;
+
+	//TODO explain, think about overflow
+	uint32_t subsecondTicks = ticks % configTICK_RATE_HZ;
+	uint64_t usecondTicks = subsecondTicks * 1000000;
+
+	uptime.tv_usec = usecondTicks / configTICK_RATE_HZ;
+
+	return uptime;
+}