Nordic Semiconductor / nrf51-sdk

Nordic nrf51 sdk sources. Mirrored from https://github.com/ARMmbed/nrf51-sdk.

Dependents:   nRF51822 nRF51822

source/nordic_sdk/components/libraries/util/app_util.h@24:2aea0c1c57ee, 2016-04-07 (annotated)

Committer:
vcoubard
Date:
Thu Apr 07 17:37:49 2016 +0100
Revision:
24:2aea0c1c57ee
Parent:
22:67a8d2c0bbbf
Child:
27:0fe148f1bca3
Synchronized with git rev 709d3cdb

Author: Liyou Zhou

Change version number in README

Who changed what in which revision?

UserRevisionLine numberNew contents of line
vcoubard 20:a90c48eb1d30 1 /*
vcoubard 20:a90c48eb1d30 2 * Copyright (c) Nordic Semiconductor ASA
vcoubard 20:a90c48eb1d30 3 * All rights reserved.
vcoubard 20:a90c48eb1d30 4 *
vcoubard 20:a90c48eb1d30 5 * Redistribution and use in source and binary forms, with or without modification,
vcoubard 20:a90c48eb1d30 6 * are permitted provided that the following conditions are met:
vcoubard 20:a90c48eb1d30 7 *
vcoubard 20:a90c48eb1d30 8 * 1. Redistributions of source code must retain the above copyright notice, this
vcoubard 20:a90c48eb1d30 9 * list of conditions and the following disclaimer.
vcoubard 20:a90c48eb1d30 10 *
vcoubard 20:a90c48eb1d30 11 * 2. Redistributions in binary form must reproduce the above copyright notice, this
vcoubard 20:a90c48eb1d30 12 * list of conditions and the following disclaimer in the documentation and/or
vcoubard 20:a90c48eb1d30 13 * other materials provided with the distribution.
vcoubard 20:a90c48eb1d30 14 *
vcoubard 20:a90c48eb1d30 15 * 3. Neither the name of Nordic Semiconductor ASA nor the names of other
vcoubard 20:a90c48eb1d30 16 * contributors to this software may be used to endorse or promote products
vcoubard 20:a90c48eb1d30 17 * derived from this software without specific prior written permission.
vcoubard 20:a90c48eb1d30 18 *
vcoubard 20:a90c48eb1d30 19 *
vcoubard 20:a90c48eb1d30 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
vcoubard 20:a90c48eb1d30 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
vcoubard 20:a90c48eb1d30 22 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
vcoubard 20:a90c48eb1d30 23 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
vcoubard 20:a90c48eb1d30 24 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
vcoubard 20:a90c48eb1d30 25 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
vcoubard 20:a90c48eb1d30 26 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
vcoubard 20:a90c48eb1d30 27 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
vcoubard 20:a90c48eb1d30 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
vcoubard 20:a90c48eb1d30 29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
vcoubard 20:a90c48eb1d30 30 *
Vincent Coubard 0:f2542974c862 31 */
Vincent Coubard 0:f2542974c862 32
Vincent Coubard 0:f2542974c862 33 /** @file
Vincent Coubard 0:f2542974c862 34 *
Vincent Coubard 0:f2542974c862 35 * @defgroup app_util Utility Functions and Definitions
Vincent Coubard 0:f2542974c862 36 * @{
Vincent Coubard 0:f2542974c862 37 * @ingroup app_common
Vincent Coubard 0:f2542974c862 38 *
Vincent Coubard 0:f2542974c862 39 * @brief Various types and definitions available to all applications.
Vincent Coubard 0:f2542974c862 40 */
Vincent Coubard 0:f2542974c862 41
Vincent Coubard 0:f2542974c862 42 #ifndef APP_UTIL_H__
Vincent Coubard 0:f2542974c862 43 #define APP_UTIL_H__
Vincent Coubard 0:f2542974c862 44
Vincent Coubard 0:f2542974c862 45 #include <stdint.h>
Vincent Coubard 0:f2542974c862 46 #include <stdbool.h>
Vincent Coubard 0:f2542974c862 47 #include "compiler_abstraction.h"
Vincent Coubard 0:f2542974c862 48
Vincent Coubard 0:f2542974c862 49 enum
Vincent Coubard 0:f2542974c862 50 {
Vincent Coubard 0:f2542974c862 51 UNIT_0_625_MS = 625, /**< Number of microseconds in 0.625 milliseconds. */
Vincent Coubard 0:f2542974c862 52 UNIT_1_25_MS = 1250, /**< Number of microseconds in 1.25 milliseconds. */
Vincent Coubard 0:f2542974c862 53 UNIT_10_MS = 10000 /**< Number of microseconds in 10 milliseconds. */
Vincent Coubard 0:f2542974c862 54 };
Vincent Coubard 0:f2542974c862 55
vcoubard 24:2aea0c1c57ee 56
vcoubard 24:2aea0c1c57ee 57 /**@brief Implementation specific macro for delayed macro expansion used in string concatenation
vcoubard 24:2aea0c1c57ee 58 *
vcoubard 24:2aea0c1c57ee 59 * @param[in] lhs Left hand side in concatenation
vcoubard 24:2aea0c1c57ee 60 * @param[in] rhs Right hand side in concatenation
vcoubard 24:2aea0c1c57ee 61 */
vcoubard 24:2aea0c1c57ee 62 #define STRING_CONCATENATE_IMPL(lhs, rhs) lhs ## rhs
vcoubard 24:2aea0c1c57ee 63
vcoubard 24:2aea0c1c57ee 64
vcoubard 24:2aea0c1c57ee 65 /**@brief Macro used to concatenate string using delayed macro expansion
vcoubard 24:2aea0c1c57ee 66 *
vcoubard 24:2aea0c1c57ee 67 * @note This macro will delay concatenation until the expressions have been resolved
vcoubard 24:2aea0c1c57ee 68 *
vcoubard 24:2aea0c1c57ee 69 * @param[in] lhs Left hand side in concatenation
vcoubard 24:2aea0c1c57ee 70 * @param[in] rhs Right hand side in concatenation
vcoubard 24:2aea0c1c57ee 71 */
vcoubard 24:2aea0c1c57ee 72 #define STRING_CONCATENATE(lhs, rhs) STRING_CONCATENATE_IMPL(lhs, rhs)
vcoubard 24:2aea0c1c57ee 73
vcoubard 24:2aea0c1c57ee 74
vcoubard 24:2aea0c1c57ee 75 // Disable lint-warnings/errors for STATIC_ASSERT
vcoubard 24:2aea0c1c57ee 76 //lint --emacro(10,STATIC_ASSERT)
vcoubard 24:2aea0c1c57ee 77 //lint --emacro(18,STATIC_ASSERT)
vcoubard 24:2aea0c1c57ee 78 //lint --emacro(19,STATIC_ASSERT)
vcoubard 24:2aea0c1c57ee 79 //lint --emacro(30,STATIC_ASSERT)
vcoubard 24:2aea0c1c57ee 80 //lint --emacro(37,STATIC_ASSERT)
vcoubard 24:2aea0c1c57ee 81 //lint --emacro(42,STATIC_ASSERT)
vcoubard 24:2aea0c1c57ee 82 //lint --emacro(26,STATIC_ASSERT)
vcoubard 24:2aea0c1c57ee 83 //lint --emacro(102,STATIC_ASSERT)
vcoubard 24:2aea0c1c57ee 84 //lint --emacro(533,STATIC_ASSERT)
vcoubard 24:2aea0c1c57ee 85 //lint --emacro(534,STATIC_ASSERT)
vcoubard 24:2aea0c1c57ee 86 //lint --emacro(132,STATIC_ASSERT)
vcoubard 24:2aea0c1c57ee 87 //lint --emacro(414,STATIC_ASSERT)
vcoubard 24:2aea0c1c57ee 88 //lint --emacro(578,STATIC_ASSERT)
vcoubard 24:2aea0c1c57ee 89 //lint --emacro(628,STATIC_ASSERT)
vcoubard 24:2aea0c1c57ee 90 //lint --emacro(648,STATIC_ASSERT)
vcoubard 24:2aea0c1c57ee 91 //lint --emacro(830,STATIC_ASSERT)
vcoubard 24:2aea0c1c57ee 92
vcoubard 24:2aea0c1c57ee 93
vcoubard 22:67a8d2c0bbbf 94 /**@brief Macro for doing static (i.e. compile time) assertion.
vcoubard 24:2aea0c1c57ee 95 *
vcoubard 24:2aea0c1c57ee 96 * @note If the EXPR isn't resolvable, then the error message won't be shown.
vcoubard 24:2aea0c1c57ee 97 *
vcoubard 24:2aea0c1c57ee 98 * @note The output of STATIC_ASSERT_MSG will be different across different compilers.
vcoubard 24:2aea0c1c57ee 99 *
vcoubard 24:2aea0c1c57ee 100 * @param[in] EXPR Constant expression to be verified.
vcoubard 24:2aea0c1c57ee 101 */
vcoubard 24:2aea0c1c57ee 102 #if defined ( __COUNTER__ )
vcoubard 19:47192cb9def7 103
vcoubard 24:2aea0c1c57ee 104 #define STATIC_ASSERT(EXPR) \
vcoubard 24:2aea0c1c57ee 105 ;enum { STRING_CONCATENATE(static_assert_, __COUNTER__) = 1/(!!(EXPR)) }
vcoubard 24:2aea0c1c57ee 106
Vincent Coubard 0:f2542974c862 107 #else
vcoubard 24:2aea0c1c57ee 108
vcoubard 24:2aea0c1c57ee 109 #define STATIC_ASSERT(EXPR) \
vcoubard 24:2aea0c1c57ee 110 ;enum { STRING_CONCATENATE(assert_line_, __LINE__) = 1/(!!(EXPR)) }
vcoubard 24:2aea0c1c57ee 111
Vincent Coubard 0:f2542974c862 112 #endif
Vincent Coubard 0:f2542974c862 113
Vincent Coubard 0:f2542974c862 114
vcoubard 24:2aea0c1c57ee 115
Vincent Coubard 0:f2542974c862 116 /**@brief type for holding an encoded (i.e. little endian) 16 bit unsigned integer. */
Vincent Coubard 0:f2542974c862 117 typedef uint8_t uint16_le_t[2];
Vincent Coubard 0:f2542974c862 118
Vincent Coubard 0:f2542974c862 119 /**@brief type for holding an encoded (i.e. little endian) 32 bit unsigned integer. */
Vincent Coubard 0:f2542974c862 120 typedef uint8_t uint32_le_t[4];
Vincent Coubard 0:f2542974c862 121
Vincent Coubard 0:f2542974c862 122 /**@brief Byte array type. */
Vincent Coubard 0:f2542974c862 123 typedef struct
Vincent Coubard 0:f2542974c862 124 {
Vincent Coubard 0:f2542974c862 125 uint16_t size; /**< Number of array entries. */
Vincent Coubard 0:f2542974c862 126 uint8_t * p_data; /**< Pointer to array entries. */
Vincent Coubard 0:f2542974c862 127 } uint8_array_t;
vcoubard 1:ebc0e0ef0a11 128
Vincent Coubard 0:f2542974c862 129 /**@brief Perform rounded integer division (as opposed to truncating the result).
Vincent Coubard 0:f2542974c862 130 *
Vincent Coubard 0:f2542974c862 131 * @param[in] A Numerator.
Vincent Coubard 0:f2542974c862 132 * @param[in] B Denominator.
Vincent Coubard 0:f2542974c862 133 *
Vincent Coubard 0:f2542974c862 134 * @return Rounded (integer) result of dividing A by B.
Vincent Coubard 0:f2542974c862 135 */
Vincent Coubard 0:f2542974c862 136 #define ROUNDED_DIV(A, B) (((A) + ((B) / 2)) / (B))
Vincent Coubard 0:f2542974c862 137
Vincent Coubard 0:f2542974c862 138 /**@brief Check if the integer provided is a power of two.
Vincent Coubard 0:f2542974c862 139 *
Vincent Coubard 0:f2542974c862 140 * @param[in] A Number to be tested.
Vincent Coubard 0:f2542974c862 141 *
Vincent Coubard 0:f2542974c862 142 * @return true if value is power of two.
Vincent Coubard 0:f2542974c862 143 * @return false if value not power of two.
Vincent Coubard 0:f2542974c862 144 */
Vincent Coubard 0:f2542974c862 145 #define IS_POWER_OF_TWO(A) ( ((A) != 0) && ((((A) - 1) & (A)) == 0) )
Vincent Coubard 0:f2542974c862 146
Vincent Coubard 0:f2542974c862 147 /**@brief To convert milliseconds to ticks.
Vincent Coubard 0:f2542974c862 148 * @param[in] TIME Number of milliseconds to convert.
Vincent Coubard 0:f2542974c862 149 * @param[in] RESOLUTION Unit to be converted to in [us/ticks].
Vincent Coubard 0:f2542974c862 150 */
Vincent Coubard 0:f2542974c862 151 #define MSEC_TO_UNITS(TIME, RESOLUTION) (((TIME) * 1000) / (RESOLUTION))
Vincent Coubard 0:f2542974c862 152
Vincent Coubard 0:f2542974c862 153
Vincent Coubard 0:f2542974c862 154 /**@brief Perform integer division, making sure the result is rounded up.
Vincent Coubard 0:f2542974c862 155 *
Vincent Coubard 0:f2542974c862 156 * @details One typical use for this is to compute the number of objects with size B is needed to
Vincent Coubard 0:f2542974c862 157 * hold A number of bytes.
Vincent Coubard 0:f2542974c862 158 *
Vincent Coubard 0:f2542974c862 159 * @param[in] A Numerator.
Vincent Coubard 0:f2542974c862 160 * @param[in] B Denominator.
Vincent Coubard 0:f2542974c862 161 *
Vincent Coubard 0:f2542974c862 162 * @return Integer result of dividing A by B, rounded up.
Vincent Coubard 0:f2542974c862 163 */
Vincent Coubard 0:f2542974c862 164 #define CEIL_DIV(A, B) \
Vincent Coubard 0:f2542974c862 165 /*lint -save -e573 */ \
Vincent Coubard 0:f2542974c862 166 ((((A) - 1) / (B)) + 1) \
Vincent Coubard 0:f2542974c862 167 /*lint -restore */
Vincent Coubard 0:f2542974c862 168
Vincent Coubard 0:f2542974c862 169 /**@brief Function for encoding a uint16 value.
Vincent Coubard 0:f2542974c862 170 *
Vincent Coubard 0:f2542974c862 171 * @param[in] value Value to be encoded.
Vincent Coubard 0:f2542974c862 172 * @param[out] p_encoded_data Buffer where the encoded data is to be written.
Vincent Coubard 0:f2542974c862 173 *
Vincent Coubard 0:f2542974c862 174 * @return Number of bytes written.
Vincent Coubard 0:f2542974c862 175 */
Vincent Coubard 0:f2542974c862 176 static __INLINE uint8_t uint16_encode(uint16_t value, uint8_t * p_encoded_data)
Vincent Coubard 0:f2542974c862 177 {
Vincent Coubard 0:f2542974c862 178 p_encoded_data[0] = (uint8_t) ((value & 0x00FF) >> 0);
Vincent Coubard 0:f2542974c862 179 p_encoded_data[1] = (uint8_t) ((value & 0xFF00) >> 8);
Vincent Coubard 0:f2542974c862 180 return sizeof(uint16_t);
Vincent Coubard 0:f2542974c862 181 }
vcoubard 1:ebc0e0ef0a11 182
Vincent Coubard 0:f2542974c862 183 /**@brief Function for encoding a uint32 value.
Vincent Coubard 0:f2542974c862 184 *
Vincent Coubard 0:f2542974c862 185 * @param[in] value Value to be encoded.
Vincent Coubard 0:f2542974c862 186 * @param[out] p_encoded_data Buffer where the encoded data is to be written.
Vincent Coubard 0:f2542974c862 187 *
Vincent Coubard 0:f2542974c862 188 * @return Number of bytes written.
Vincent Coubard 0:f2542974c862 189 */
Vincent Coubard 0:f2542974c862 190 static __INLINE uint8_t uint32_encode(uint32_t value, uint8_t * p_encoded_data)
Vincent Coubard 0:f2542974c862 191 {
Vincent Coubard 0:f2542974c862 192 p_encoded_data[0] = (uint8_t) ((value & 0x000000FF) >> 0);
Vincent Coubard 0:f2542974c862 193 p_encoded_data[1] = (uint8_t) ((value & 0x0000FF00) >> 8);
Vincent Coubard 0:f2542974c862 194 p_encoded_data[2] = (uint8_t) ((value & 0x00FF0000) >> 16);
Vincent Coubard 0:f2542974c862 195 p_encoded_data[3] = (uint8_t) ((value & 0xFF000000) >> 24);
Vincent Coubard 0:f2542974c862 196 return sizeof(uint32_t);
Vincent Coubard 0:f2542974c862 197 }
Vincent Coubard 0:f2542974c862 198
Vincent Coubard 0:f2542974c862 199 /**@brief Function for decoding a uint16 value.
Vincent Coubard 0:f2542974c862 200 *
Vincent Coubard 0:f2542974c862 201 * @param[in] p_encoded_data Buffer where the encoded data is stored.
Vincent Coubard 0:f2542974c862 202 *
Vincent Coubard 0:f2542974c862 203 * @return Decoded value.
Vincent Coubard 0:f2542974c862 204 */
Vincent Coubard 0:f2542974c862 205 static __INLINE uint16_t uint16_decode(const uint8_t * p_encoded_data)
Vincent Coubard 0:f2542974c862 206 {
vcoubard 1:ebc0e0ef0a11 207 return ( (((uint16_t)((uint8_t *)p_encoded_data)[0])) |
Vincent Coubard 0:f2542974c862 208 (((uint16_t)((uint8_t *)p_encoded_data)[1]) << 8 ));
Vincent Coubard 0:f2542974c862 209 }
Vincent Coubard 0:f2542974c862 210
Vincent Coubard 0:f2542974c862 211 /**@brief Function for decoding a uint32 value.
Vincent Coubard 0:f2542974c862 212 *
Vincent Coubard 0:f2542974c862 213 * @param[in] p_encoded_data Buffer where the encoded data is stored.
Vincent Coubard 0:f2542974c862 214 *
Vincent Coubard 0:f2542974c862 215 * @return Decoded value.
Vincent Coubard 0:f2542974c862 216 */
Vincent Coubard 0:f2542974c862 217 static __INLINE uint32_t uint32_decode(const uint8_t * p_encoded_data)
Vincent Coubard 0:f2542974c862 218 {
Vincent Coubard 0:f2542974c862 219 return ( (((uint32_t)((uint8_t *)p_encoded_data)[0]) << 0) |
Vincent Coubard 0:f2542974c862 220 (((uint32_t)((uint8_t *)p_encoded_data)[1]) << 8) |
Vincent Coubard 0:f2542974c862 221 (((uint32_t)((uint8_t *)p_encoded_data)[2]) << 16) |
Vincent Coubard 0:f2542974c862 222 (((uint32_t)((uint8_t *)p_encoded_data)[3]) << 24 ));
Vincent Coubard 0:f2542974c862 223 }
vcoubard 1:ebc0e0ef0a11 224
Vincent Coubard 0:f2542974c862 225 /** @brief Function for converting the input voltage (in milli volts) into percentage of 3.0 Volts.
Vincent Coubard 0:f2542974c862 226 *
Vincent Coubard 0:f2542974c862 227 * @details The calculation is based on a linearized version of the battery's discharge
Vincent Coubard 0:f2542974c862 228 * curve. 3.0V returns 100% battery level. The limit for power failure is 2.1V and
Vincent Coubard 0:f2542974c862 229 * is considered to be the lower boundary.
Vincent Coubard 0:f2542974c862 230 *
Vincent Coubard 0:f2542974c862 231 * The discharge curve for CR2032 is non-linear. In this model it is split into
Vincent Coubard 0:f2542974c862 232 * 4 linear sections:
Vincent Coubard 0:f2542974c862 233 * - Section 1: 3.0V - 2.9V = 100% - 42% (58% drop on 100 mV)
Vincent Coubard 0:f2542974c862 234 * - Section 2: 2.9V - 2.74V = 42% - 18% (24% drop on 160 mV)
Vincent Coubard 0:f2542974c862 235 * - Section 3: 2.74V - 2.44V = 18% - 6% (12% drop on 300 mV)
Vincent Coubard 0:f2542974c862 236 * - Section 4: 2.44V - 2.1V = 6% - 0% (6% drop on 340 mV)
Vincent Coubard 0:f2542974c862 237 *
Vincent Coubard 0:f2542974c862 238 * These numbers are by no means accurate. Temperature and
Vincent Coubard 0:f2542974c862 239 * load in the actual application is not accounted for!
Vincent Coubard 0:f2542974c862 240 *
Vincent Coubard 0:f2542974c862 241 * @param[in] mvolts The voltage in mV
Vincent Coubard 0:f2542974c862 242 *
Vincent Coubard 0:f2542974c862 243 * @return Battery level in percent.
Vincent Coubard 0:f2542974c862 244 */
Vincent Coubard 0:f2542974c862 245 static __INLINE uint8_t battery_level_in_percent(const uint16_t mvolts)
Vincent Coubard 0:f2542974c862 246 {
Vincent Coubard 0:f2542974c862 247 uint8_t battery_level;
Vincent Coubard 0:f2542974c862 248
Vincent Coubard 0:f2542974c862 249 if (mvolts >= 3000)
Vincent Coubard 0:f2542974c862 250 {
Vincent Coubard 0:f2542974c862 251 battery_level = 100;
Vincent Coubard 0:f2542974c862 252 }
Vincent Coubard 0:f2542974c862 253 else if (mvolts > 2900)
Vincent Coubard 0:f2542974c862 254 {
Vincent Coubard 0:f2542974c862 255 battery_level = 100 - ((3000 - mvolts) * 58) / 100;
Vincent Coubard 0:f2542974c862 256 }
Vincent Coubard 0:f2542974c862 257 else if (mvolts > 2740)
Vincent Coubard 0:f2542974c862 258 {
Vincent Coubard 0:f2542974c862 259 battery_level = 42 - ((2900 - mvolts) * 24) / 160;
Vincent Coubard 0:f2542974c862 260 }
Vincent Coubard 0:f2542974c862 261 else if (mvolts > 2440)
Vincent Coubard 0:f2542974c862 262 {
Vincent Coubard 0:f2542974c862 263 battery_level = 18 - ((2740 - mvolts) * 12) / 300;
Vincent Coubard 0:f2542974c862 264 }
Vincent Coubard 0:f2542974c862 265 else if (mvolts > 2100)
Vincent Coubard 0:f2542974c862 266 {
Vincent Coubard 0:f2542974c862 267 battery_level = 6 - ((2440 - mvolts) * 6) / 340;
Vincent Coubard 0:f2542974c862 268 }
Vincent Coubard 0:f2542974c862 269 else
Vincent Coubard 0:f2542974c862 270 {
Vincent Coubard 0:f2542974c862 271 battery_level = 0;
Vincent Coubard 0:f2542974c862 272 }
Vincent Coubard 0:f2542974c862 273
Vincent Coubard 0:f2542974c862 274 return battery_level;
Vincent Coubard 0:f2542974c862 275 }
Vincent Coubard 0:f2542974c862 276
Vincent Coubard 0:f2542974c862 277 /**@brief Function for checking if a pointer value is aligned to a 4 byte boundary.
Vincent Coubard 0:f2542974c862 278 *
Vincent Coubard 0:f2542974c862 279 * @param[in] p Pointer value to be checked.
Vincent Coubard 0:f2542974c862 280 *
Vincent Coubard 0:f2542974c862 281 * @return TRUE if pointer is aligned to a 4 byte boundary, FALSE otherwise.
Vincent Coubard 0:f2542974c862 282 */
Vincent Coubard 0:f2542974c862 283 static __INLINE bool is_word_aligned(void * p)
Vincent Coubard 0:f2542974c862 284 {
Vincent Coubard 0:f2542974c862 285 return (((uintptr_t)p & 0x03) == 0);
Vincent Coubard 0:f2542974c862 286 }
Vincent Coubard 0:f2542974c862 287
Vincent Coubard 0:f2542974c862 288 #endif // APP_UTIL_H__
Vincent Coubard 0:f2542974c862 289
vcoubard 1:ebc0e0ef0a11 290 /** @} */