ASF Sensor API Physics Constants.
This module defines commonly used physical constants and conversions in standard units.
Investigate replacing numerical library, including constants in this header, with the GNU Scientific Library (GSL) and select pieces of the Boost C++ math and numerics libraries for feature rich application layer code.
Copyright (c) 2011-2018 Microchip Technology Inc. and its subsidiaries.
Macros | |
Physical Constants | |
| #define | CONST_AIR_MOLAR_MASS (0.0289644) |
| molar mass of dry air \(\frac{kg}{mol}\) More... | |
| #define | CONST_BOLTZMANN (1.2806503e-23) |
| Boltzmann constant \(\frac{m^{2} kg}{s^{2} K}\). More... | |
| #define | CONST_STANDARD_ATM (1.01325e5) |
| standard atmospheric pressure \(\frac{N}{m^{2}}\) More... | |
| #define | CONST_REAL_GAS (287.04) |
| dry atmospheric air gas constant \(\frac{m^{2}}{s^{2} K}\) More... | |
| #define | CONST_STANDARD_GRAVITY (9.80665) |
| standard gravity \(\frac{m}{s^{2}}\) More... | |
| #define | CONST_UNIVERSAL_GAS (8.31447215) |
| ideal gas constant \(\frac{J}{K mol}\) More... | |
| #define | CONST_UNIVERSAL_GRAVITY (6.673e-11) |
| universal gravitational constant \(\frac{m^{3}}{s^{2} kg}\) More... | |
General Purpose Conversion Constants | |
| #define | M_PI (3.14159265358979323846264338327) |
| #define | RAD_TO_DEG (180 / M_PI) |
| radians to degrees More... | |
| #define | DEG_TO_RAD (M_PI / 180) |
| degrees to radians More... | |
| #define | GAUSS_TO_MICRO_TESLA (100) |
| \(1 Gauss = 100 \mu T\) More... | |
| #define | KELVIN_TO_CELSIUS(K) ((K)-273.15) |
| #define | CELSIUS_TO_KELVIN(C) ((C)+273.15) |
| #define | FAHRENHEIT_TO_CELSIUS(F) (((5 * ((F)-32)) / 9) + 0.5) |
| #define | CELSIUS_TO_FAHRENHEIT(C) ((((9 * (C)) / 5) + 32) + 0.5) |
| #define CELSIUS_TO_FAHRENHEIT | ( | C | ) | ((((9 * (C)) / 5) + 32) + 0.5) |
| #define CELSIUS_TO_KELVIN | ( | C | ) | ((C)+273.15) |
| #define CONST_AIR_MOLAR_MASS (0.0289644) |
molar mass of dry air \(\frac{kg}{mol}\)
| #define CONST_BOLTZMANN (1.2806503e-23) |
Boltzmann constant \(\frac{m^{2} kg}{s^{2} K}\).
| #define CONST_REAL_GAS (287.04) |
dry atmospheric air gas constant \(\frac{m^{2}}{s^{2} K}\)
| #define CONST_STANDARD_ATM (1.01325e5) |
standard atmospheric pressure \(\frac{N}{m^{2}}\)
| #define CONST_STANDARD_GRAVITY (9.80665) |
standard gravity \(\frac{m}{s^{2}}\)
| #define CONST_UNIVERSAL_GAS (8.31447215) |
ideal gas constant \(\frac{J}{K mol}\)
| #define CONST_UNIVERSAL_GRAVITY (6.673e-11) |
universal gravitational constant \(\frac{m^{3}}{s^{2} kg}\)
| #define DEG_TO_RAD (M_PI / 180) |
degrees to radians
| #define FAHRENHEIT_TO_CELSIUS | ( | F | ) | (((5 * ((F)-32)) / 9) + 0.5) |
| #define GAUSS_TO_MICRO_TESLA (100) |
\(1 Gauss = 100 \mu T\)
Referenced by hmc5883l_get_field(), and hmc5883l_get_heading().
| #define KELVIN_TO_CELSIUS | ( | K | ) | ((K)-273.15) |
| #define M_PI (3.14159265358979323846264338327) |
| #define RAD_TO_DEG (180 / M_PI) |
radians to degrees
1.8.5