[modules] UAVCan battery information (#3284)

conf/airframes/tudelft/rot_wing_25kg.xml

@@ -35,6 +35,7 @@
 
             <!-- Range sensor connected to supercan -->
             <module name="range_sensor_uavcan"/>
+            <module name="battery_uavcan"/>
 
             <!-- Disable current sensing using UAVCAN -->
             <define name="UAVCAN_ACTUATORS_USE_CURRENT" value="FALSE"/>

conf/modules/battery_uavcan.xml

@@ -0,0 +1,20 @@
+<!DOCTYPE module SYSTEM "module.dtd">
+
+<module name="battery_uavcan" dir="sensors" task="sensors">
+  <doc>
+    <description>
+      Battery sensor over the uavcan protocol 
+    </description>
+  </doc>
+  <dep>
+    <depends>uavcan</depends>
+    <provides></provides>
+  </dep>
+  <header>
+    <file name="battery_uavcan.h"/>
+  </header>
+  <init fun="battery_uavcan_init()"/>
+  <makefile target="ap">
+    <file name="battery_uavcan.c"/>
+  </makefile>
+</module>