camera trigger : mavlink stream

msg/camera_trigger.msg

@@ -0,0 +1,4 @@
+
+uint64 timestamp	# Timestamp when camera was triggered
+uint32 seq		# Image sequence
+

src/modules/camera_trigger/camera_trigger.cpp

@@ -184,7 +184,7 @@ CameraTrigger::start()
 
 	if (_gpio_fd < 0) {
 		
-		warnx("GPIO device open fail");	// TODO
+		warnx("GPIO device open fail");
 		stop();
 	}
 	else

src/modules/mavlink/mavlink_main.cpp

@@ -1611,6 +1611,7 @@ Mavlink::task_main(int argc, char *argv[])
 		configure_stream("SYSTEM_TIME", 1.0f);
 		configure_stream("TIMESYNC", 10.0f);
 		configure_stream("ACTUATOR_CONTROL_TARGET0", 10.0f);
+		configure_stream("CAMERA_TRIGGER", 30.0f);
 		break;
 
 	case MAVLINK_MODE_OSD:

src/modules/mavlink/mavlink_messages.cpp

@@ -70,6 +70,7 @@
 #include <uORB/topics/battery_status.h>
 #include <uORB/topics/navigation_capabilities.h>
 #include <uORB/topics/distance_sensor.h>
+#include <uORB/topics/camera_trigger.h>
 #include <drivers/drv_rc_input.h>
 #include <drivers/drv_pwm_output.h>
 #include <systemlib/err.h>
@@ -1062,6 +1063,59 @@ protected:
 	}
 };
 
+
+class MavlinkStreamCameraTrigger : public MavlinkStream
+{
+public:
+	const char *get_name() const {
+		return MavlinkStreamCameraTrigger::get_name_static();
+	}
+
+	static const char *get_name_static() {
+		return "CAMERA_TRIGGER";
+	}
+
+	uint8_t get_id() {
+		return MAVLINK_MSG_ID_CAMERA_TRIGGER;
+	}
+
+	static MavlinkStream *new_instance(Mavlink *mavlink) {
+		return new MavlinkStreamCameraTrigger(mavlink);
+	}
+
+	unsigned get_size() {
+		return MAVLINK_MSG_ID_CAMERA_TRIGGER_LEN + MAVLINK_NUM_NON_PAYLOAD_BYTES;
+	}
+
+private:
+	MavlinkOrbSubscription *_camera_trigger_sub;
+	uint64_t _trig_time;
+
+	/* do not allow top copying this class */
+	MavlinkStreamCameraTrigger(MavlinkStreamCameraTrigger &);
+	MavlinkStreamCameraTrigger &operator = (const MavlinkStreamCameraTrigger &);
+
+protected:
+	explicit MavlinkStreamCameraTrigger(Mavlink *mavlink) : MavlinkStream(mavlink),
+	_camera_trigger_sub(_mavlink->add_orb_subscription(ORB_ID(camera_trigger))),
+	_trig_time(0)
+	{}
+
+	void send(const hrt_abstime t) {
+		struct camera_trigger_s trigger;
+
+		if (_camera_trigger_sub->update(&_trig_time, &trigger)) {
+			
+			mavlink_camera_trigger_t msg;
+
+			msg.time_usec = trigger.timestamp;
+			msg.seq = trigger.seq;
+			
+			_mavlink->send_message(MAVLINK_MSG_ID_CAMERA_TRIGGER, &msg);
+		}
+	}
+};
+
 class MavlinkStreamGlobalPositionInt : public MavlinkStream
 {
 public:

src/modules/uORB/topics/camera_trigger.h

@@ -1,6 +1,6 @@
 /****************************************************************************
  *
- *   Copyright (c) 2015 PX4 Development Team. All rights reserved.
+ *   Copyright (C) 2013-2015 PX4 Development Team. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -31,30 +31,35 @@
  *
  ****************************************************************************/
 
-/**
+/* Auto-generated by genmsg_cpp from file /home/kabir/fork/Firmware/msg/camera_trigger.msg */
- * @file camera_trigger.h
- * Camera-IMU synchronisation and triggering
- */
 
-#ifndef TOPIC_CAMERA_TRIGGER_H_
-#define TOPIC_CAMERA_TRIGGER_H_
 
-#include <platforms/px4_defines.h>
+#pragma once
+
 #include <stdint.h>
+#include <uORB/uORB.h>
+
+
+#ifndef __cplusplus
+
+#endif
 
 /**
  * @addtogroup topics
  * @{
  */
 
-/**
+
- * Camera-IMU synchronisation message
+#ifdef __cplusplus
- */
+struct __EXPORT camera_trigger_s {
+#else
 struct camera_trigger_s {
+#endif
+	uint64_t timestamp;
+	uint32_t seq;
+#ifdef __cplusplus
 
-	uint64_t timestamp;	/**< Timestamp when camera was triggered */
+#endif
-	uint32_t seq;		/**< Image sequence - reset to zero on getting trigger reset command */
-	
 };
 
 /**
@@ -63,6 +68,3 @@ struct camera_trigger_s {
 
 /* register this as object request broker structure */
 ORB_DECLARE(camera_trigger);
-
-#endif /* TOPIC_CAMERA_TRIGGER_H_ */
-