added gps support

added compass support
added ui elements for gps and compass
added support for writing sensor data

ui/debug/PlotGPS.cpp

@@ -0,0 +1,37 @@
+#include "PlotGPS.h"
+#include <QPainter>
+
+PlotGPS::PlotGPS(QWidget *parent) : QWidget(parent) {
+
+	setMinimumWidth(32);
+	setMinimumHeight(96);
+
+}
+
+void PlotGPS::add(const Timestamp ts, const GPSData& data) {
+	(void) ts;
+	this->gpsData = data;
+}
+
+void PlotGPS::paintEvent(QPaintEvent* evt) {
+
+	(void) evt;
+	QPainter p(this);
+
+	// frame
+	p.fillRect(0,0,width(),height(),QColor(255,255,255,192));
+	p.setPen(Qt::black);
+	p.drawRect(0,0,width()-1,height()-1);
+
+	// turn [relative]
+	const QPen pen(Qt::black);
+	p.setPen(pen);
+	p.drawText(4, 1*12, QString::number(gpsData.tsReceived.ms()));
+	p.drawText(4, 2*12, QString::number(gpsData.lat));
+	p.drawText(4, 3*12, QString::number(gpsData.lon));
+	p.drawText(4, 4*12, QString::number(gpsData.alt));
+	p.drawText(4, 5*12, QString::number(gpsData.accuracy));
+
+	p.end();
+
+}