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181 lines
6.3 KiB
181 lines
6.3 KiB
/*
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/ _____) _ | |
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( (____ _____ ____ _| |_ _____ ____| |__
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\____ \| ___ | (_ _) ___ |/ ___) _ \
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_____) ) ____| | | || |_| ____( (___| | | |
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(______/|_____)_|_|_| \__)_____)\____)_| |_|
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(C)2013 Semtech
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Description: Helper functions implementation
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License: Revised BSD License, see LICENSE.TXT file include in the project
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Maintainer: Miguel Luis and Gregory Cristian
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*/
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/******************************************************************************
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* @file utilities.h
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* @author MCD Application Team
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* @version V1.1.2
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* @date 08-September-2017
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* @brief Header for driver utilities.c module
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******************************************************************************
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* @attention
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*
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* <h2><center>© Copyright (c) 2017 STMicroelectronics International N.V.
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* All rights reserved.</center></h2>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted, provided that the following conditions are met:
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*
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* 1. Redistribution of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of other
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* contributors to this software may be used to endorse or promote products
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* derived from this software without specific written permission.
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* 4. This software, including modifications and/or derivative works of this
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* software, must execute solely and exclusively on microcontroller or
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* microprocessor devices manufactured by or for STMicroelectronics.
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* 5. Redistribution and use of this software other than as permitted under
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* this license is void and will automatically terminate your rights under
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* this license.
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*
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* THIS SOFTWARE IS PROVIDED BY STMICROELECTRONICS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS, IMPLIED OR STATUTORY WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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* PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY
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* RIGHTS ARE DISCLAIMED TO THE FULLEST EXTENT PERMITTED BY LAW. IN NO EVENT
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* SHALL STMICROELECTRONICS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************
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*/
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#ifndef __UTILITIES_H__
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#define __UTILITIES_H__
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#include "hw_conf.h"
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// this should not be needed here :/
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#ifndef ARM_MATH_CM0
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#define ARM_MATH_CM0
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#endif
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#include "arm_math.h"
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/* BACKUP_PRIMASK MUST be implemented at the begining of the funtion
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that implement a critical section
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PRIMASK is saved on STACK and recovered at the end of the funtion
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That way RESTORE_PRIMASK ensures that no irq would be triggered in case of
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unbalanced enable/disable, reentrant code etc...*/
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#define BACKUP_PRIMASK() uint32_t primask_bit= __get_PRIMASK()
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#define DISABLE_IRQ() __disable_irq()
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#define ENABLE_IRQ() __enable_irq()
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#define RESTORE_PRIMASK() __set_PRIMASK(primask_bit)
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/* prepocessor directive to align buffer*/
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#define ALIGN(n) __attribute__((aligned(n)))
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typedef uint32_t TimerTime_t;
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/*!
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* \brief Returns the minimum value between a and b
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*
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* \param [IN] a 1st value
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* \param [IN] b 2nd value
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* \retval minValue Minimum value
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*/
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#define MIN( a, b ) ( ( ( a ) < ( b ) ) ? ( a ) : ( b ) )
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/*!
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* \brief Returns the maximum value between a and b
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*
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* \param [IN] a 1st value
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* \param [IN] b 2nd value
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* \retval maxValue Maximum value
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*/
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#define MAX( a, b ) ( ( ( a ) > ( b ) ) ? ( a ) : ( b ) )
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/*!
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* \brief Returns 2 raised to the power of n
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*
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* \param [IN] n power value
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* \retval result of raising 2 to the power n
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*/
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#define POW2( n ) ( 1 << n )
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/*!
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* \brief Find First Set
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* This function identifies the least significant index or position of the
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* bits set to one in the word
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*
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* \param [in] value Value to find least significant index
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* \retval bitIndex Index of least significat bit at one
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*/
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static inline uint8_t __ffs( uint32_t value )
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{
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return( uint32_t )( 32 - __CLZ( value & ( -value ) ) );
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}
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/*!
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* \brief Initializes the pseudo random generator initial value
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*
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* \param [IN] seed Pseudo random generator initial value
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*/
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void srand1( uint32_t seed );
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/*!
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* \brief Computes a random number between min and max
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*
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* \param [IN] min range minimum value
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* \param [IN] max range maximum value
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* \retval random random value in range min..max
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*/
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int32_t randr( int32_t min, int32_t max );
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/*!
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* \brief Copies size elements of src array to dst array
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*
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* \remark STM32 Standard memcpy function only works on pointers that are aligned
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*
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* \param [OUT] dst Destination array
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* \param [IN] src Source array
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* \param [IN] size Number of bytes to be copied
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*/
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void memcpy1( uint8_t *dst, const uint8_t *src, uint16_t size );
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/*!
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* \brief Copies size elements of src array to dst array reversing the byte order
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*
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* \param [OUT] dst Destination array
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* \param [IN] src Source array
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* \param [IN] size Number of bytes to be copied
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*/
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void memcpyr( uint8_t *dst, const uint8_t *src, uint16_t size );
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/*!
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* \brief Set size elements of dst array with value
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*
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* \remark STM32 Standard memset function only works on pointers that are aligned
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*
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* \param [OUT] dst Destination array
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* \param [IN] value Default value
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* \param [IN] size Number of bytes to be copied
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*/
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void memset1( uint8_t *dst, uint8_t value, uint16_t size );
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/*!
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* \brief Converts a nibble to an hexadecimal character
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*
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* \param [IN] a Nibble to be converted
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* \retval hexChar Converted hexadecimal character
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*/
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int8_t Nibble2HexChar( uint8_t a );
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#endif // __UTILITIES_H__
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