moved commander to C++, preparation for better gyro scale calibration respecting the current attitude for more accurate results

src/modules/commander/commander_helper.cpp

@@ -0,0 +1,219 @@
+/****************************************************************************
+ *
+ *   Copyright (C) 2013 PX4 Development Team. All rights reserved.
+ *   Author: Thomas Gubler <thomasgubler@student.ethz.ch>
+ *           Julian Oes <joes@student.ethz.ch>
+ *
+ * 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.
+ *
+ ****************************************************************************/
+
+/**
+ * @file commander_helper.cpp
+ * Commander helper functions implementations
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <stdbool.h>
+#include <fcntl.h>
+
+#include <uORB/uORB.h>
+#include <uORB/topics/vehicle_status.h>
+#include <uORB/topics/actuator_controls.h>
+#include <uORB/topics/vehicle_control_mode.h>
+#include <systemlib/err.h>
+#include <systemlib/param/param.h>
+#include <drivers/drv_hrt.h>
+#include <drivers/drv_tone_alarm.h>
+#include <drivers/drv_led.h>
+
+#include "commander_helper.h"
+
+/* oddly, ERROR is not defined for c++ */
+#ifdef ERROR
+# undef ERROR
+#endif
+static const int ERROR = -1;
+
+bool is_multirotor(const struct vehicle_status_s *current_status)
+{
+	return ((current_status->system_type == VEHICLE_TYPE_QUADROTOR) ||
+	    (current_status->system_type == VEHICLE_TYPE_HEXAROTOR) ||
+	    (current_status->system_type == VEHICLE_TYPE_OCTOROTOR) ||
+	    (current_status->system_type == VEHICLE_TYPE_TRICOPTER));
+}
+
+bool is_rotary_wing(const struct vehicle_status_s *current_status)
+{
+	return is_multirotor(current_status) || (current_status->system_type == VEHICLE_TYPE_HELICOPTER)
+	|| (current_status->system_type == VEHICLE_TYPE_COAXIAL);
+}
+
+static int buzzer;
+
+int buzzer_init()
+{
+	buzzer = open("/dev/tone_alarm", O_WRONLY);
+
+	if (buzzer < 0) {
+		warnx("Buzzer: open fail\n");
+		return ERROR;
+	}
+
+	return OK;
+}
+
+void buzzer_deinit()
+{
+	close(buzzer);
+}
+
+void tune_error()
+{
+	ioctl(buzzer, TONE_SET_ALARM, 2);
+}
+
+void tune_positive()
+{
+	ioctl(buzzer, TONE_SET_ALARM, 3);
+}
+
+void tune_neutral()
+{
+	ioctl(buzzer, TONE_SET_ALARM, 4);
+}
+
+void tune_negative()
+{
+	ioctl(buzzer, TONE_SET_ALARM, 5);
+}
+
+int tune_arm()
+{
+	return ioctl(buzzer, TONE_SET_ALARM, 12);
+}
+
+int tune_critical_bat()
+{
+	return ioctl(buzzer, TONE_SET_ALARM, 14);
+}
+
+int tune_low_bat()
+{
+	return ioctl(buzzer, TONE_SET_ALARM, 13);
+}
+
+void tune_stop()
+{
+	ioctl(buzzer, TONE_SET_ALARM, 0);
+}
+
+static int leds;
+
+int led_init()
+{
+	leds = open(LED_DEVICE_PATH, 0);
+
+	if (leds < 0) {
+		warnx("LED: open fail\n");
+		return ERROR;
+	}
+
+	if (ioctl(leds, LED_ON, LED_BLUE) || ioctl(leds, LED_ON, LED_AMBER)) {
+		warnx("LED: ioctl fail\n");
+		return ERROR;
+	}
+
+	return 0;
+}
+
+void led_deinit()
+{
+	close(leds);
+}
+
+int led_toggle(int led)
+{
+	static int last_blue = LED_ON;
+	static int last_amber = LED_ON;
+
+	if (led == LED_BLUE) last_blue = (last_blue == LED_ON) ? LED_OFF : LED_ON;
+
+	if (led == LED_AMBER) last_amber = (last_amber == LED_ON) ? LED_OFF : LED_ON;
+
+	return ioctl(leds, ((led == LED_BLUE) ? last_blue : last_amber), led);
+}
+
+int led_on(int led)
+{
+	return ioctl(leds, LED_ON, led);
+}
+
+int led_off(int led)
+{
+	return ioctl(leds, LED_OFF, led);
+}
+
+float battery_remaining_estimate_voltage(float voltage)
+{
+	float ret = 0;
+	static param_t bat_volt_empty;
+	static param_t bat_volt_full;
+	static param_t bat_n_cells;
+	static bool initialized = false;
+	static unsigned int counter = 0;
+	static float ncells = 3;
+	// XXX change cells to int (and param to INT32)
+
+	if (!initialized) {
+		bat_volt_empty = param_find("BAT_V_EMPTY");
+		bat_volt_full = param_find("BAT_V_FULL");
+		bat_n_cells = param_find("BAT_N_CELLS");
+		initialized = true;
+	}
+
+	static float chemistry_voltage_empty = 3.2f;
+	static float chemistry_voltage_full = 4.05f;
+
+	if (counter % 100 == 0) {
+		param_get(bat_volt_empty, &chemistry_voltage_empty);
+		param_get(bat_volt_full, &chemistry_voltage_full);
+		param_get(bat_n_cells, &ncells);
+	}
+
+	counter++;
+
+	ret = (voltage - ncells * chemistry_voltage_empty) / (ncells * (chemistry_voltage_full - chemistry_voltage_empty));
+
+	/* limit to sane values */
+	ret = (ret < 0) ? 0 : ret;
+	ret = (ret > 1) ? 1 : ret;
+	return ret;
+}