sensors: own BAT_V_DIV and BAT_A_PER_V params (#13299)

 - this is currently necessary for the QGC power setup gui, but should be reverted in the future
 - fixes #13292

Author: dagar

src/modules/battery_status/sensor_params_battery.c

@@ -66,31 +66,6 @@ PARAM_DEFINE_FLOAT(BAT_CNT_V_CURR, -1.0);
  */
 PARAM_DEFINE_FLOAT(BAT_V_OFFS_CURR, 0.0);
 
-/**
- * Battery voltage divider (V divider)
- *
- * This is the divider from battery voltage to 3.3V ADC voltage.
- * If using e.g. Mauch power modules the value from the datasheet
- * can be applied straight here. A value of -1 means to use
- * the board default.
- *
- * @group Battery Calibration
- * @decimal 8
- */
-PARAM_DEFINE_FLOAT(BAT_V_DIV, -1.0);
-
-/**
- * Battery current per volt (A/V)
- *
- * The voltage seen by the 3.3V ADC multiplied by this factor
- * will determine the battery current. A value of -1 means to use
- * the board default.
- *
- * @group Battery Calibration
- * @decimal 8
- */
-PARAM_DEFINE_FLOAT(BAT_A_PER_V, -1.0);
-
 /**
  * Battery monitoring source.
  *

src/modules/sensors/parameters.cpp

@@ -159,6 +159,9 @@ void initialize_parameter_handles(ParameterHandles &parameter_handles)
 	// We do a param_find here to force them into the list.
 	(void)param_find("RC_CHAN_CNT");
 
+	(void)param_find("BAT_V_DIV");
+	(void)param_find("BAT_A_PER_V");
+
 	(void)param_find("CAL_ACC0_ID");
 	(void)param_find("CAL_GYRO0_ID");
 

src/modules/sensors/sensor_params_battery.c

@@ -0,0 +1,57 @@
+/****************************************************************************
+ *
+ *   Copyright (c) 2012-2019 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
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name PX4 nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/**
+ * Battery voltage divider (V divider)
+ *
+ * This is the divider from battery voltage to 3.3V ADC voltage.
+ * If using e.g. Mauch power modules the value from the datasheet
+ * can be applied straight here. A value of -1 means to use
+ * the board default.
+ *
+ * @group Battery Calibration
+ * @decimal 8
+ */
+PARAM_DEFINE_FLOAT(BAT_V_DIV, -1.0);
+
+/**
+ * Battery current per volt (A/V)
+ *
+ * The voltage seen by the 3.3V ADC multiplied by this factor
+ * will determine the battery current. A value of -1 means to use
+ * the board default.
+ *
+ * @group Battery Calibration
+ * @decimal 8
+ */
+PARAM_DEFINE_FLOAT(BAT_A_PER_V, -1.0);