From f84669039579aeef80e232c3c9a444d20bcbdf39 Mon Sep 17 00:00:00 2001
From: Lorenz Meier <lm@inf.ethz.ch>
Date: Sun, 13 Apr 2014 23:30:09 +0200
Subject: Added rangefinder message to MAVLink app

---
 src/modules/mavlink/mavlink_messages.cpp | 47 ++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)

(limited to 'src/modules/mavlink/mavlink_messages.cpp')

diff --git a/src/modules/mavlink/mavlink_messages.cpp b/src/modules/mavlink/mavlink_messages.cpp
index 47603b390..e608bf787 100644
--- a/src/modules/mavlink/mavlink_messages.cpp
+++ b/src/modules/mavlink/mavlink_messages.cpp
@@ -72,6 +72,7 @@
 #include <uORB/topics/navigation_capabilities.h>
 #include <drivers/drv_rc_input.h>
 #include <drivers/drv_pwm_output.h>
+#include <drivers/drv_range_finder.h>
 
 #include "mavlink_messages.h"
 
@@ -1271,6 +1272,51 @@ protected:
 	}
 };
 
+class MavlinkStreamDistanceSensor : public MavlinkStream
+{
+public:
+	const char *get_name()
+	{
+		return "DISTANCE_SENSOR";
+	}
+
+	MavlinkStream *new_instance()
+	{
+		return new MavlinkStreamDistanceSensor();
+	}
+
+private:
+	MavlinkOrbSubscription *range_sub;
+	struct range_finder_report *range;
+
+protected:
+	void subscribe(Mavlink *mavlink)
+	{
+		range_sub = mavlink->add_orb_subscription(ORB_ID(sensor_range_finder));
+		range = (struct range_finder_report *)range_sub->get_data();
+	}
+
+	void send(const hrt_abstime t)
+	{
+		(void)range_sub->update(t);
+
+		uint8_t type;
+
+		switch (range->type) {
+			case RANGE_FINDER_TYPE_LASER:
+			type = MAV_DISTANCE_SENSOR_LASER;
+			break;
+		}
+
+		uint8_t id = 0;
+		uint8_t orientation = 0;
+		uint8_t covariance = 20;
+
+		mavlink_msg_distance_sensor_send(_channel, range->timestamp / 1000, type, id, orientation, 
+			range->minimum_distance*100, range->maximum_distance*100, range->distance*100, covariance);
+	}
+};
+
 MavlinkStream *streams_list[] = {
 	new MavlinkStreamHeartbeat(),
 	new MavlinkStreamSysStatus(),
@@ -1297,5 +1343,6 @@ MavlinkStream *streams_list[] = {
 	new MavlinkStreamAttitudeControls(),
 	new MavlinkStreamNamedValueFloat(),
 	new MavlinkStreamCameraCapture(),
+	new MavlinkStreamDistanceSensor(),
 	nullptr
 };
-- 
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