mirror of
https://github.com/arduino/Arduino.git
synced 2024-11-30 11:24:12 +01:00
54 lines
1.6 KiB
C
Executable File
54 lines
1.6 KiB
C
Executable File
/*! \file fixedpt.h \brief Fixed-point math function library. */
|
|
//*****************************************************************************
|
|
//
|
|
// File Name : 'fixedpt.h'
|
|
// Title : Fixed-point math function library
|
|
// Author : Pascal Stang - Copyright (C) 2003
|
|
// Created : 2003.01.26
|
|
// Revised : 2003.02.04
|
|
// Version : 0.1
|
|
// Target MCU : Atmel AVR Series
|
|
// Editor Tabs : 4
|
|
//
|
|
// NOTE: This code is currently below version 1.0, and therefore is considered
|
|
// to be lacking in some functionality or documentation, or may not be fully
|
|
// tested. Nonetheless, you can expect most functions to work.
|
|
//
|
|
// This code is distributed under the GNU Public License
|
|
// which can be found at http://www.gnu.org/licenses/gpl.txt
|
|
//
|
|
//*****************************************************************************
|
|
|
|
#ifndef FIXEDPT_H
|
|
#define FIXEDPT_H
|
|
|
|
#include "global.h"
|
|
|
|
// constants/macros/typdefs
|
|
|
|
// functions
|
|
|
|
//! fixedptInit() initializes fixed-point math function library
|
|
// set the number of bits to use behind the point
|
|
void fixedptInit(u08 fixedPtBits);
|
|
|
|
//! convert integer to fixed-point number
|
|
s32 fixedptConvertFromInt(s32 int_number);
|
|
|
|
//! convert fixed-point number to integer
|
|
s32 fixedptConvertToInt(s32 fp_number);
|
|
|
|
//! add a and b (a+b) with fixed-point math
|
|
s32 fixedptAdd(s32 a, s32 b);
|
|
|
|
//! subtract a and b (a-b) with fixed-point math
|
|
s32 fixedptSubtract(s32 a, s32 b);
|
|
|
|
//! multiply a and b (a*b) with fixed-point math
|
|
s32 fixedptMultiply(s32 a, s32 b);
|
|
|
|
//! divide numer by denom (numer/denom) with fixed-point math
|
|
s32 fixedptDivide(s32 numer, s32 denom);
|
|
|
|
#endif
|