cmake remove circular linking and reorganize

- px4_add_module now requires MAIN
 - px4_add_library doesn't automatically link

src/lib/parameters/templates/px4_parameters.c.jinja

@@ -0,0 +1,38 @@
+{# jinja syntax: http://jinja.pocoo.org/docs/2.9/templates/ #}
+#include "px4_parameters.h"
+
+// DO NOT EDIT
+// This file is autogenerated from paramaters.xml
+
+__BEGIN_DECLS
+
+const
+#ifndef __PX4_DARWIN
+__attribute__((used, section("__param")))
+#endif
+
+struct px4_parameters_t px4_parameters = {
+{% for param in params %}
+	{
+		"{{ param.attrib["name"] }}",
+		PARAM_TYPE_{{ param.attrib["type"] }},
+	{%- if param.attrib["volatile"] == "true" %}
+		.volatile_param = 1,
+	{%- else %}
+		.volatile_param = 0,
+	{%- endif %}
+	{%- if param.attrib["type"] == "FLOAT" %}
+		.val.f = {{ param.attrib["default"] }}
+	{%- elif param.attrib["type"] == "INT32" %}
+		.val.i = {{ param.attrib["default"] }}
+	{%- endif %}
+	},
+{% endfor %}
+	{{ params | length }}
+};
+
+//extern const struct px4_parameters_t px4_parameters;
+
+__END_DECLS
+
+{# vim: set noet ft=jinja fenc=utf-8 ff=unix sts=4 sw=4 ts=4 : #}

src/lib/parameters/templates/px4_parameters.h.jinja

@@ -0,0 +1,21 @@
+{# jinja syntax: http://jinja.pocoo.org/docs/2.9/templates/ #}
+#include <stdint.h>
+#include <parameters/param.h>
+
+// DO NOT EDIT
+// This file is autogenerated from parameters.xml
+
+__BEGIN_DECLS
+
+struct px4_parameters_t {
+{%- for param in params %}
+	const struct param_info_s __param__{{ param.attrib["name"] }};
+{%- endfor %}
+	const unsigned int param_count;
+};
+
+extern const struct px4_parameters_t px4_parameters;
+
+__END_DECLS
+
+{# vim: set noet ft=jinja fenc=utf-8 ff=unix sts=4 sw=4 ts=4 : #}

src/lib/parameters/templates/px4_parameters_public.h.jinja

@@ -0,0 +1,37 @@
+{# jinja syntax: http://jinja.pocoo.org/docs/2.9/templates/ #}
+#include <stdint.h>
+#include <parameters/param.h>
+
+// DO NOT EDIT
+// This file is autogenerated from parameters.xml
+
+
+#ifdef	__cplusplus
+
+namespace px4 { {# wrap the enum in a namespace, otherwise we get shadowing errors for MAV_TYPE #}
+
+/// Enum with all parameters
+enum class params {
+	{# enums are guaranteed to start with 0 (if the value for the first is not
+	   specified), and then incremented by 1 (the implementation depends on that!)  #}
+{%- for param in params %}
+	{{ param.attrib["name"] }},
+{%- endfor %}
+	
+	_COUNT
+};
+
+// All parameter types
+{# (px4_parameters is marked as extern, so we cannot use it as constexpr) #}
+static const constexpr int param_types_array[] =  {
+{%- for param in params %}
+	PARAM_TYPE_{{ param.attrib["type"] }}, // {{ param.attrib["name"] }}
+{%- endfor %}
+};
+
+
+} // namespace px4
+
+
+#endif /* __cplusplus */
+