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sensirion_common.c
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sensirion_common.c
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/*
* Copyright (c) 2018, Sensirion AG
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* * Redistributions in binary form 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.
*
* * Neither the name of Sensirion AG nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER 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.
*/
#include "sensirion_common.h"
#include "sensirion_config.h"
uint16_t sensirion_common_bytes_to_uint16_t(const uint8_t* bytes) {
return (uint16_t)bytes[0] << 8 | (uint16_t)bytes[1];
}
uint32_t sensirion_common_bytes_to_uint32_t(const uint8_t* bytes) {
return (uint32_t)bytes[0] << 24 | (uint32_t)bytes[1] << 16 |
(uint32_t)bytes[2] << 8 | (uint32_t)bytes[3];
}
int16_t sensirion_common_bytes_to_int16_t(const uint8_t* bytes) {
return (int16_t)sensirion_common_bytes_to_uint16_t(bytes);
}
int32_t sensirion_common_bytes_to_int32_t(const uint8_t* bytes) {
return (int32_t)sensirion_common_bytes_to_uint32_t(bytes);
}
float sensirion_common_bytes_to_float(const uint8_t* bytes) {
union {
uint32_t u32_value;
float float32;
} tmp;
tmp.u32_value = sensirion_common_bytes_to_uint32_t(bytes);
return tmp.float32;
}
void sensirion_common_uint32_t_to_bytes(const uint32_t value, uint8_t* bytes) {
bytes[0] = value >> 24;
bytes[1] = value >> 16;
bytes[2] = value >> 8;
bytes[3] = value;
}
void sensirion_common_uint16_t_to_bytes(const uint16_t value, uint8_t* bytes) {
bytes[0] = value >> 8;
bytes[1] = value;
}
void sensirion_common_int32_t_to_bytes(const int32_t value, uint8_t* bytes) {
bytes[0] = value >> 24;
bytes[1] = value >> 16;
bytes[2] = value >> 8;
bytes[3] = value;
}
void sensirion_common_int16_t_to_bytes(const int16_t value, uint8_t* bytes) {
bytes[0] = value >> 8;
bytes[1] = value;
}
void sensirion_common_float_to_bytes(const float value, uint8_t* bytes) {
union {
uint32_t u32_value;
float float32;
} tmp;
tmp.float32 = value;
sensirion_common_uint32_t_to_bytes(tmp.u32_value, bytes);
}
void sensirion_common_copy_bytes(const uint8_t* source, uint8_t* destination,
uint16_t data_length) {
uint16_t i;
for (i = 0; i < data_length; i++) {
destination[i] = source[i];
}
}