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90 lines
4.4 KiB
C
90 lines
4.4 KiB
C
/**
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******************************************************************************
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*
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* @file pios_math.h
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* @author The OpenPilot Team, http://www.openpilot.org Copyright (C) 2010.
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* @brief Header for math functions/macro definitions
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*
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* @see The GNU Public License (GPL) Version 3
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*
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*****************************************************************************/
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef PIOS_MATH_H
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#define PIOS_MATH_H
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// Generic float math constants
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#define M_E_F 2.71828182845904523536028747135f /* e */
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#define M_LOG2E_F 1.44269504088896340735992468100f /* log_2 (e) */
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#define M_LOG10E_F 0.43429448190325182765112891892f /* log_10 (e) */
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#define M_SQRT2_F 1.41421356237309504880168872421f /* sqrt(2) */
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#define M_SQRT1_2_F 0.70710678118654752440084436210f /* sqrt(1/2) */
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#define M_SQRT3_F 1.73205080756887729352744634151f /* sqrt(3) */
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#define M_PI_F 3.14159265358979323846264338328f /* pi */
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#define M_PI_2_F 1.57079632679489661923132169164f /* pi/2 */
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#define M_PI_4_F 0.78539816339744830961566084582f /* pi/4 */
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#define M_SQRTPI_F 1.77245385090551602729816748334f /* sqrt(pi) */
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#define M_2_SQRTPI_F 1.12837916709551257389615890312f /* 2/sqrt(pi) */
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#define M_1_PI_F 0.31830988618379067153776752675f /* 1/pi */
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#define M_2_PI_F 0.63661977236758134307553505349f /* 2/pi */
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#define M_2PI_F 6.28318530717958647692528676656f /* 2pi */
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#define M_LN10_F 2.30258509299404568401799145468f /* ln(10) */
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#define M_LN2_F 0.69314718055994530941723212146f /* ln(2) */
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#define M_LNPI_F 1.14472988584940017414342735135f /* ln(pi) */
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#define M_EULER_F 0.57721566490153286060651209008f /* Euler constant */
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#define M_E_D 2.71828182845904523536028747135d /* e */
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#define M_LOG2E_D 1.44269504088896340735992468100d /* log_2 (e) */
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#define M_LOG10E_D 0.43429448190325182765112891892d /* log_10 (e) */
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#define M_SQRT2_D 1.41421356237309504880168872421d /* sqrt(2) */
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#define M_SQRT1_2_D 0.70710678118654752440084436210d /* sqrt(1/2) */
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#define M_SQRT3_D 1.73205080756887729352744634151d /* sqrt(3) */
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#define M_PI_D 3.14159265358979323846264338328d /* pi */
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#define M_PI_2_D 1.57079632679489661923132169164d /* pi/2 */
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#define M_PI_4_D 0.78539816339744830961566084582d /* pi/4 */
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#define M_2PI_D 6.28318530717958647692528676656d /* 2pi */
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#define M_SQRTPI_D 1.77245385090551602729816748334d /* sqrt(pi) */
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#define M_2_SQRTPI_D 1.12837916709551257389615890312d /* 2/sqrt(pi) */
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#define M_1_PI_D 0.31830988618379067153776752675d /* 1/pi */
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#define M_2_PI_D 0.63661977236758134307553505349d /* 2/pi */
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#define M_LN10_D 2.30258509299404568401799145468d /* ln(10) */
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#define M_LN2_D 0.69314718055994530941723212146d /* ln(2) */
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#define M_LNPI_D 1.14472988584940017414342735135d /* ln(pi) */
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#define M_EULER_D 0.57721566490153286060651209008d /* Euler constant */
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// Conversion macro
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#define RAD2DEG(rad) ((rad) * (180.0f / M_PI_F))
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#define DEG2RAD(deg) ((deg) * (M_PI_F / 180.0f))
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#define RAD2DEG_D(rad) ((rad) * (180.0d / M_PI_D))
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#define DEG2RAD_D(deg) ((deg) * (M_PI_D / 180.0d))
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// helper macros for LPFs
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#define LPF_ALPHA(dt, fc) (dt / (dt + 1.0f / (2.0f * M_PI_F * fc)))
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// Useful math macros
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#define MAX(a, b) ((a) > (b) ? (a) : (b))
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#define MIN(a, b) ((a) < (b) ? (a) : (b))
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#define IS_REAL(f) (isfinite(f))
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// Bitfield access
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#define IS_SET(field, mask) (((field) & (mask)) == (mask))
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#define SET_MASK(field, mask) (field) |= (mask)
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#define UNSET_MASK(field, mask) (field) &= ~(mask)
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#endif // PIOS_MATH_H
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