AVR_SITL: fix compile warnings re float constants

libraries/AP_HAL_AVR_SITL/AnalogIn.cpp

@@ -47,7 +47,7 @@ float ADCSource::read_latest() {
 
     case ANALOG_INPUT_NONE:
     default:
-        return 0.0;
+        return 0.0f;
     }
 }
 

libraries/AP_HAL_AVR_SITL/SITL_State.cpp

@@ -536,7 +536,7 @@ void SITL_State::_simulator_output(bool synthetic_clock_mode)
 			control.pwm[2] = ((control.pwm[2]-1000) * _sitl->engine_mul) + 1000;
 			if (control.pwm[2] > 2000) control.pwm[2] = 2000;
 		}
-		_motors_on = ((control.pwm[2]-1000)/1000.0) > 0;
+		_motors_on = ((control.pwm[2]-1000)/1000.0f) > 0;
 	} else if (_vehicle == APMrover2) {
 		// add in engine multiplier
 		if (control.pwm[2] != 1500) {
@@ -544,7 +544,7 @@ void SITL_State::_simulator_output(bool synthetic_clock_mode)
 			if (control.pwm[2] > 2000) control.pwm[2] = 2000;
 			if (control.pwm[2] < 1000) control.pwm[2] = 1000;
 		}
-		_motors_on = ((control.pwm[2]-1500)/500.0) != 0;
+		_motors_on = ((control.pwm[2]-1500)/500.0f) != 0;
 	} else {
 		_motors_on = false;
         // apply engine multiplier to first motor
@@ -555,7 +555,7 @@ void SITL_State::_simulator_output(bool synthetic_clock_mode)
             if (control.pwm[i] > 2000) control.pwm[i] = 2000;
             if (control.pwm[i] < 1000) control.pwm[i] = 1000;
             // update motor_on flag
-			if ((control.pwm[i]-1000)/1000.0 > 0) {
+			if ((control.pwm[i]-1000)/1000.0f > 0) {
                 _motors_on = true;
 			}
 		}
@@ -565,10 +565,10 @@ void SITL_State::_simulator_output(bool synthetic_clock_mode)
     // lose 0.7V at full throttle
     float voltage = _sitl->batt_voltage - 0.7f*throttle;
     // assume 50A at full throttle
-    _current = 50.0 * throttle;
+    _current = 50.0f * throttle;
     // assume 3DR power brick
-    voltage_pin_value = ((voltage / 10.1) / 5.0) * 1024;
-    current_pin_value = ((_current / 17.0) / 5.0) * 1024;
+    voltage_pin_value = ((voltage / 10.1f) / 5.0f) * 1024;
+    current_pin_value = ((_current / 17.0f) / 5.0f) * 1024;
 
 	// setup wind control
     float wind_speed = _sitl->wind_speed * 100;
@@ -607,7 +607,7 @@ Vector3f SITL_State::_rand_vec3f(void)
 	Vector3f v = Vector3f(_rand_float(),
                           _rand_float(),
                           _rand_float());
-	if (v.length() != 0.0) {
+	if (v.length() != 0.0f) {
 		v.normalize();
 	}
 	return v;

libraries/AP_HAL_AVR_SITL/sitl_gps.cpp

@@ -101,7 +101,7 @@ int SITL_State::gps2_pipe(void)
 void SITL_State::_gps_write(const uint8_t *p, uint16_t size)
 {
 	while (size--) {
-		if (_sitl->gps_byteloss > 0.0) {
+		if (_sitl->gps_byteloss > 0.0f) {
 			float r = ((((unsigned)random()) % 1000000)) / 1.0e4;
 			if (r < _sitl->gps_byteloss) {
 				// lose the byte
@@ -222,8 +222,8 @@ void SITL_State::_update_gps_ubx(const struct gps_data *d)
 	pos.time = time_week_ms;
 	pos.longitude = d->longitude * 1.0e7;
 	pos.latitude  = d->latitude * 1.0e7;
-	pos.altitude_ellipsoid = d->altitude*1000.0;
-	pos.altitude_msl = d->altitude*1000.0;
+	pos.altitude_ellipsoid = d->altitude*1000.0f;
+	pos.altitude_msl = d->altitude*1000.0f;
 	pos.horizontal_accuracy = 1500;
 	pos.vertical_accuracy = 2000;
 
@@ -236,14 +236,14 @@ void SITL_State::_update_gps_ubx(const struct gps_data *d)
 	status.uptime = hal.scheduler->millis();
 
 	velned.time = time_week_ms;
-	velned.ned_north = 100.0 * d->speedN;
-	velned.ned_east  = 100.0 * d->speedE;
-	velned.ned_down  = 100.0 * d->speedD;
+	velned.ned_north = 100.0f * d->speedN;
+	velned.ned_east  = 100.0f * d->speedE;
+	velned.ned_down  = 100.0f * d->speedD;
 	velned.speed_2d = pythagorous2(d->speedN, d->speedE) * 100;
 	velned.speed_3d = pythagorous3(d->speedN, d->speedE, d->speedD) * 100;
-	velned.heading_2d = ToDeg(atan2f(d->speedE, d->speedN)) * 100000.0;
-	if (velned.heading_2d < 0.0) {
-		velned.heading_2d += 360.0 * 100000.0;
+	velned.heading_2d = ToDeg(atan2f(d->speedE, d->speedN)) * 100000.0f;
+	if (velned.heading_2d < 0.0f) {
+		velned.heading_2d += 360.0f * 100000.0f;
 	}
 	velned.speed_accuracy = 40;
 	velned.heading_accuracy = 4;
@@ -312,9 +312,9 @@ void SITL_State::_update_gps_mtk(const struct gps_data *d)
     p.longitude     = d->longitude * 1.0e6;
     p.altitude      = d->altitude * 100;
     p.ground_speed  = pythagorous2(d->speedN, d->speedE) * 100;
-    p.ground_course = ToDeg(atan2f(d->speedE, d->speedN)) * 1000000.0;
-	if (p.ground_course < 0.0) {
-		p.ground_course += 360.0 * 1000000.0;
+    p.ground_course = ToDeg(atan2f(d->speedE, d->speedN)) * 1000000.0f;
+	if (p.ground_course < 0.0f) {
+		p.ground_course += 360.0f * 1000000.0f;
 	}
     p.satellites    = d->have_lock?_sitl->gps_numsats:3;
     p.fix_type      = d->have_lock?3:1;
@@ -369,9 +369,9 @@ void SITL_State::_update_gps_mtk16(const struct gps_data *d)
     p.longitude     = d->longitude * 1.0e6;
     p.altitude      = d->altitude * 100;
     p.ground_speed  = pythagorous2(d->speedN, d->speedE) * 100;
-    p.ground_course = ToDeg(atan2f(d->speedE, d->speedN)) * 100.0;
-	if (p.ground_course < 0.0) {
-		p.ground_course += 360.0 * 100.0;
+    p.ground_course = ToDeg(atan2f(d->speedE, d->speedN)) * 100.0f;
+	if (p.ground_course < 0.0f) {
+		p.ground_course += 360.0f * 100.0f;
 	}
     p.satellites    = d->have_lock?_sitl->gps_numsats:3;
     p.fix_type      = d->have_lock?3:1;
@@ -427,9 +427,9 @@ void SITL_State::_update_gps_mtk19(const struct gps_data *d)
     p.longitude     = d->longitude * 1.0e7;
     p.altitude      = d->altitude * 100;
     p.ground_speed  = pythagorous2(d->speedN, d->speedE) * 100;
-    p.ground_course = ToDeg(atan2f(d->speedE, d->speedN)) * 100.0;
-	if (p.ground_course < 0.0) {
-		p.ground_course += 360.0 * 100.0;
+    p.ground_course = ToDeg(atan2f(d->speedE, d->speedN)) * 100.0f;
+	if (p.ground_course < 0.0f) {
+		p.ground_course += 360.0f * 100.0f;
 	}
     p.satellites    = d->have_lock?_sitl->gps_numsats:3;
     p.fix_type      = d->have_lock?3:1;
@@ -723,7 +723,7 @@ void SITL_State::_update_gps(double latitude, double longitude, float altitude,
 
     if (_sitl->gps_drift_alt > 0) {
         // slow altitude drift
-        d.altitude += _sitl->gps_drift_alt*sinf(hal.scheduler->millis()*0.001*0.02);
+        d.altitude += _sitl->gps_drift_alt*sinf(hal.scheduler->millis()*0.001f*0.02f);
     }
     
 	d.speedN = speedN;

libraries/AP_HAL_AVR_SITL/sitl_ins.cpp

@@ -34,7 +34,7 @@ using namespace AVR_SITL;
  */
 uint16_t SITL_State::_airspeed_sensor(float airspeed)
 {
-	const float airspeed_ratio = 1.9936;
+	const float airspeed_ratio = 1.9936f;
 	const float airspeed_offset = 2013;
 	float airspeed_pressure, airspeed_raw;
 
@@ -80,8 +80,8 @@ uint16_t SITL_State::_airspeed_sensor(float airspeed)
 
 float SITL_State::_gyro_drift(void)
 {
-	if (_sitl->drift_speed == 0.0f ||
-	    _sitl->drift_time == 0.0f) {
+    if (_sitl->drift_speed == 0.0f ||
+        _sitl->drift_time == 0.0f) {
 		return 0;
 	}
 	double period  = _sitl->drift_time * 2;
@@ -165,9 +165,9 @@ void SITL_State::_update_ins(float roll, 	float pitch, 	float yaw,		// Relative
 
 	// minimum noise levels are 2 bits, but averaged over many
 	// samples, giving around 0.01 m/s/s
-	float accel_noise = 0.01;
+	float accel_noise = 0.01f;
         // minimum gyro noise is also less than 1 bit
-	float gyro_noise = ToRad(0.04);
+	float gyro_noise = ToRad(0.04f);
 	if (_motors_on) {
 		// add extra noise when the motors are on
 		accel_noise += _sitl->accel_noise;