owner-nrf52sdk/nRF5_SDK_15.2.0/components/libraries/util/nordic_common.h

/**
 * Copyright (c) 2008 - 2018, Nordic Semiconductor ASA
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification,
 * are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form, except as embedded into a Nordic
 *    Semiconductor ASA integrated circuit in a product or a software update for
 *    such product, must reproduce the above copyright notice, this list of
 *    conditions and the following disclaimer in the documentation and/or other
 *    materials provided with the distribution.
 *
 * 3. Neither the name of Nordic Semiconductor ASA nor the names of its
 *    contributors may be used to endorse or promote products derived from this
 *    software without specific prior written permission.
 *
 * 4. This software, with or without modification, must only be used with a
 *    Nordic Semiconductor ASA integrated circuit.
 *
 * 5. Any software provided in binary form under this license must not be reverse
 *    engineered, decompiled, modified and/or disassembled.
 *
 * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 */
/** @file
 * @brief Common defines and macros for firmware developed by Nordic Semiconductor.
 */

#ifndef NORDIC_COMMON_H__
#define NORDIC_COMMON_H__

#ifdef __cplusplus
extern "C" {
#endif

/**
 * @brief Check if selected module is enabled
 *
 * This is save function for driver enable checking.
 * Correct from Lint point of view (not using default of undefined value).
 *
 * Usage:
 * @code
   #if NRF_MODULE_ENABLED(UART)
   ...
   #endif
 * @endcode
 *
 * @param module The module name.
 *
 * @retval 1 The macro <module>_ENABLE is defined and is non-zero.
 * @retval 0 The macro <module>_ENABLE is not defined or it equals zero.
 *
 * @note
 * This macro intentionally does not implement second expansion level.
 * The name of the module to be checked has to be given directly as a parameter.
 * And given parameter would be connected with @c _ENABLED postfix directly
 * without evaluating its value.
 */
//lint -emacro(491,NRF_MODULE_ENABLED) // Suppers warning 491 "non-standard use of 'defined' preprocessor operator"
#ifdef NRF_MODULE_ENABLE_ALL
#warning "Do not use NRF_MODULE_ENABLE_ALL for real builds."
#define NRF_MODULE_ENABLED(module) 1
#else
#define NRF_MODULE_ENABLED(module) \
    ((defined(module ## _ENABLED) && (module ## _ENABLED)) ? 1 : 0)
#endif
/** The upper 8 bits of a 32 bit value */
//lint -emacro(572,MSB_32) // Suppress warning 572 "Excessive shift value"
#define MSB_32(a) (((a) & 0xFF000000) >> 24)
/** The lower 8 bits (of a 32 bit value) */
#define LSB_32(a) ((a) & 0x000000FF)

/** The upper 8 bits of a 16 bit value */
//lint -emacro(572,MSB_16) // Suppress warning 572 "Excessive shift value"
#define MSB_16(a) (((a) & 0xFF00) >> 8)
/** The lower 8 bits (of a 16 bit value) */
#define LSB_16(a) ((a) & 0x00FF)

/** Leaves the minimum of the two 32-bit arguments */
/*lint -emacro(506, MIN) */ /* Suppress "Constant value Boolean */
#define MIN(a, b) ((a) < (b) ? (a) : (b))
/** Leaves the maximum of the two 32-bit arguments */
/*lint -emacro(506, MAX) */ /* Suppress "Constant value Boolean */
#define MAX(a, b) ((a) < (b) ? (b) : (a))

/**@brief Concatenates two parameters.
 *
 * It realizes two level expansion to make it sure that all the parameters
 * are actually expanded before gluing them together.
 *
 * @param p1 First parameter to concatenating
 * @param p2 Second parameter to concatenating
 *
 * @return Two parameters glued together.
 *         They have to create correct C mnemonic in other case
 *         preprocessor error would be generated.
 *
 * @sa CONCAT_3
 */
#define CONCAT_2(p1, p2)      CONCAT_2_(p1, p2)
/** Auxiliary macro used by @ref CONCAT_2 */
#define CONCAT_2_(p1, p2)     p1##p2

/**@brief Concatenates three parameters.
 *
 * It realizes two level expansion to make it sure that all the parameters
 * are actually expanded before gluing them together.
 *
 * @param p1 First parameter to concatenating
 * @param p2 Second parameter to concatenating
 * @param p3 Third parameter to concatenating
 *
 * @return Three parameters glued together.
 *         They have to create correct C mnemonic in other case
 *         preprocessor error would be generated.
 *
 * @sa CONCAT_2
 */
#define CONCAT_3(p1, p2, p3)  CONCAT_3_(p1, p2, p3)
/** Auxiliary macro used by @ref CONCAT_3 */
#define CONCAT_3_(p1, p2, p3) p1##p2##p3

#define STRINGIFY_(val) #val
/** Converts a macro argument into a character constant.
 */
#define STRINGIFY(val)  STRINGIFY_(val)

/** Counts number of elements inside the array
 */
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))

/**@brief Set a bit in the uint32 word.
 *
 * @param[in] W  Word whose bit is being set.
 * @param[in] B  Bit number in the word to be set.
 */
#define SET_BIT(W, B)  ((W) |= (uint32_t)(1U << (B)))


/**@brief Clears a bit in the uint32 word.
 *
 * @param[in] W   Word whose bit is to be cleared.
 * @param[in] B   Bit number in the word to be cleared.
 */
#define CLR_BIT(W, B) ((W) &= (~(uint32_t)(1U << (B))))


/**@brief Checks if a bit is set.
 *
 * @param[in] W   Word whose bit is to be checked.
 * @param[in] B   Bit number in the word to be checked.
 *
 * @retval 1 if bit is set.
 * @retval 0 if bit is not set.
 */
#define IS_SET(W, B) (((W) >> (B)) & 1)

#define BIT_0 0x01 /**< The value of bit 0 */
#define BIT_1 0x02 /**< The value of bit 1 */
#define BIT_2 0x04 /**< The value of bit 2 */
#define BIT_3 0x08 /**< The value of bit 3 */
#define BIT_4 0x10 /**< The value of bit 4 */
#define BIT_5 0x20 /**< The value of bit 5 */
#define BIT_6 0x40 /**< The value of bit 6 */
#define BIT_7 0x80 /**< The value of bit 7 */
#define BIT_8 0x0100 /**< The value of bit 8 */
#define BIT_9 0x0200 /**< The value of bit 9 */
#define BIT_10 0x0400 /**< The value of bit 10 */
#define BIT_11 0x0800 /**< The value of bit 11 */
#define BIT_12 0x1000 /**< The value of bit 12 */
#define BIT_13 0x2000 /**< The value of bit 13 */
#define BIT_14 0x4000 /**< The value of bit 14 */
#define BIT_15 0x8000 /**< The value of bit 15 */
#define BIT_16 0x00010000 /**< The value of bit 16 */
#define BIT_17 0x00020000 /**< The value of bit 17 */
#define BIT_18 0x00040000 /**< The value of bit 18 */
#define BIT_19 0x00080000 /**< The value of bit 19 */
#define BIT_20 0x00100000 /**< The value of bit 20 */
#define BIT_21 0x00200000 /**< The value of bit 21 */
#define BIT_22 0x00400000 /**< The value of bit 22 */
#define BIT_23 0x00800000 /**< The value of bit 23 */
#define BIT_24 0x01000000 /**< The value of bit 24 */
#define BIT_25 0x02000000 /**< The value of bit 25 */
#define BIT_26 0x04000000 /**< The value of bit 26 */
#define BIT_27 0x08000000 /**< The value of bit 27 */
#define BIT_28 0x10000000 /**< The value of bit 28 */
#define BIT_29 0x20000000 /**< The value of bit 29 */
#define BIT_30 0x40000000 /**< The value of bit 30 */
#define BIT_31 0x80000000 /**< The value of bit 31 */

#define UNUSED_VARIABLE(X)  ((void)(X))
#define UNUSED_PARAMETER(X) UNUSED_VARIABLE(X)
#define UNUSED_RETURN_VALUE(X) UNUSED_VARIABLE(X)

#ifdef __cplusplus
}
#endif

#endif // NORDIC_COMMON_H__