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authorRomain Forlot <romain.forlot@iot.bzh>2018-07-05 15:36:17 +0200
committerRomain Forlot <romain.forlot@iot.bzh>2018-07-05 16:22:47 +0200
commit3e45dda1b12578c9d84b7a4f479e2a9fbaaa5d3b (patch)
treeb9db87d4972299fd7ceff366d3c1ae6d88dc4a99 /plugins/gps.cpp
parent772552a441dae3ef7e25c7144269385c9ca68a4e (diff)
Change, clean plugins.
Improve GPS plugin to be able to calculate the heading also remove the builtin plugin that was an error. We need to pass GPS plugin in C++ to be able to use the context. Handle "double" and "int" signal's value. Change-Id: I6d902e4ac76a0e933326c0b4c43922645c9c5a4c Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>
Diffstat (limited to 'plugins/gps.cpp')
-rw-r--r--plugins/gps.cpp70
1 files changed, 70 insertions, 0 deletions
diff --git a/plugins/gps.cpp b/plugins/gps.cpp
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+++ b/plugins/gps.cpp
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+/*
+ * Copyright (C) 2016 "IoT.bzh"
+ * Author Romain Forlot <romain.forlot@iot.bzh>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+*/
+
+#define CTL_PLUGIN_MAGIC 1286576532
+
+#define AFB_BINDING_VERSION 2
+#include <afb/afb-binding.h>
+#include <systemd/sd-event.h>
+#include <json-c/json_object.h>
+#include <math.h>
+
+#include "signal-composer.hpp"
+
+extern "C"
+{
+CTLP_CAPI_REGISTER("gps");
+
+CTLP_CAPI (getHeading, source, argsJ, eventJ) {
+
+ static bool coordUpdated = true;
+ static double prvLat = 0, prvLon = 0, curLat = 0, curLon = 0, heading = 0;
+ double r2d = 180.0 / M_PI;
+ double d2r = M_PI / 180.0;
+ int err = 0;
+
+ struct signalCBT* ctx = (struct signalCBT*)source->context;
+ json_object *val = NULL, *lastSignal = NULL, *id = NULL;
+
+ lastSignal = json_object_array_get_idx(eventJ, json_object_array_length(eventJ) -1);
+
+ if(json_object_object_get_ex(lastSignal, "uid", &id) && std::string(json_object_get_string(id)) == "latitude" &&
+ json_object_object_get_ex(lastSignal, "value", &val)) {
+ prvLat = curLat;
+ curLat = json_object_get_double(val);
+ coordUpdated = !coordUpdated;
+ }
+
+ if(json_object_object_get_ex(lastSignal, "uid", &id) &&
+ std::string(json_object_get_string(id)) == "longitude" &&
+ json_object_object_get_ex(lastSignal, "value", &val)) {
+ prvLon = curLon;
+ curLon = json_object_get_double(val);
+ coordUpdated = !coordUpdated;
+ }
+
+ if(coordUpdated) {
+ heading = round(r2d * atan2((curLon - prvLon) * cos(d2r * curLat), curLat - prvLat));
+ ctx->setSignalValue(ctx->aSignal, 0, heading);
+ }
+
+ AFB_NOTICE("======== Heading: %f", heading);
+ return err;
+}
+// extern "C" closure
+}