From 3e1f5c232bc9bb898223b2d9b9b045479a0b9d7d Mon Sep 17 00:00:00 2001
From: Lorenz Meier <lm@inf.ethz.ch>
Date: Mon, 14 Mar 2016 09:29:53 +0100
Subject: [PATCH] Flow driver: Handle rotation parameter if present

---
 src/drivers/px4flow/px4flow.cpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/drivers/px4flow/px4flow.cpp b/src/drivers/px4flow/px4flow.cpp
index b5b0e26949..d22f6e0711 100644
--- a/src/drivers/px4flow/px4flow.cpp
+++ b/src/drivers/px4flow/px4flow.cpp
@@ -62,6 +62,7 @@
 
 #include <systemlib/perf_counter.h>
 #include <systemlib/err.h>
+#include <systemlib/param/param.h>
 
 #include <conversion/rotation.h>
 
@@ -255,6 +256,17 @@ PX4FLOW::init()
 	/* sensor is ok, but we don't really know if it is within range */
 	_sensor_ok = true;
 
+	/* get rotation */
+	param_t rot = param_find("SENS_FLOW_ROT");
+
+	/* only set it if the parameter exists */
+	if (rot != PARAM_INVALID) {
+		int32_t val = 0;
+		param_get(rot, &val);
+
+		_sensor_rotation = (enum Rotation)val;
+	}
+
 	return ret;
 }