AC_Baro: add floating point constant designators

libraries/AP_Baro/AP_Baro_DPS280.cpp

@@ -164,13 +164,13 @@ void AP_Baro_DPS280::calculate_PT(int32_t UT, int32_t UP, float &pressure, float
 {
     const struct dps280_cal &cal = calibration;
     // scaling for 16x oversampling
-    const float scaling_16 = 1.0/253952;
+    const float scaling_16 = 1.0f/253952;
 
     float temp_scaled;
     float press_scaled;
 
     temp_scaled = float(UT) * scaling_16;
-    temperature = cal.C0 * 0.5 + cal.C1 * temp_scaled;
+    temperature = cal.C0 * 0.5f + cal.C1 * temp_scaled;
 
     press_scaled = float(UP) * scaling_16;
 

libraries/AP_Baro/AP_Baro_HIL.cpp

@@ -74,7 +74,7 @@ void AP_Baro::SimpleUnderWaterAtmosphere(
     // \f$T(D)\approx\frac{S}{1.8 \cdot 10^{-4} \cdot S \cdot T + 1}\f$
     const float seaTempSurface = 15.0f; // Celsius
     const float S = seaTempSurface * 0.338f;
-    theta = 1.0f / ((1.8e-4) * S * (alt * 1e3) + 1.0f);
+    theta = 1.0f / ((1.8e-4f) * S * (alt * 1e3f) + 1.0f);
 }
 
 /*

libraries/AP_Baro/AP_Baro_ICM20789.cpp

@@ -296,7 +296,7 @@ static struct {
 void AP_Baro_ICM20789::convert_data(uint32_t Praw, uint32_t Traw)
 {
     // temperature is easy
-    float T = -45 + (175.0 / (1U<<16)) * Traw;
+    float T = -45 + (175.0f / (1U<<16)) * Traw;
 
     // pressure involves a few more calculations
     float P = get_pressure(Praw, Traw);

libraries/AP_Baro/AP_Baro_LPS2XH.cpp

@@ -224,7 +224,7 @@ void AP_Baro_LPS2XH::_update_temperature(void)
     WITH_SEMAPHORE(_sem);
 
     if (_lps2xh_type == BARO_LPS25H) {
-        _temperature=((float)(Temp_Reg_s16/480)+42.5);
+        _temperature=((float)(Temp_Reg_s16/480)+42.5f);
     }
     if (_lps2xh_type == BARO_LPS22H) {
         _temperature=(float)(Temp_Reg_s16/100);
@@ -237,7 +237,7 @@ void AP_Baro_LPS2XH::_update_pressure(void)
     uint8_t pressure[3];
     _dev->read_registers(PRESS_OUT_XL_ADDR, pressure, 3);
     int32_t Pressure_Reg_s32 = ((uint32_t)pressure[2]<<16)|((uint32_t)pressure[1]<<8)|(uint32_t)pressure[0];
-    int32_t Pressure_mb = Pressure_Reg_s32 * (100.0 / 4096); // scale for pa
+    int32_t Pressure_mb = Pressure_Reg_s32 * (100.0f / 4096); // scale for pa
 
     WITH_SEMAPHORE(_sem);
     _pressure = Pressure_mb;