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tm_stm32_crc.c
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tm_stm32_crc.c
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/**
* |----------------------------------------------------------------------
* | Copyright (c) 2016 Tilen MAJERLE
* |
* | Permission is hereby granted, free of charge, to any person
* | obtaining a copy of this software and associated documentation
* | files (the "Software"), to deal in the Software without restriction,
* | including without limitation the rights to use, copy, modify, merge,
* | publish, distribute, sublicense, and/or sell copies of the Software,
* | and to permit persons to whom the Software is furnished to do so,
* | subject to the following conditions:
* |
* | The above copyright notice and this permission notice shall be
* | included in all copies or substantial portions of the Software.
* |
* | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* | EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* | OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
* | AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* | HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* | WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* | FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* | OTHER DEALINGS IN THE SOFTWARE.
* |----------------------------------------------------------------------
*/
#include "tm_stm32_crc.h"
void TM_CRC_Init(void) {
/* Enable CRC clock */
__HAL_RCC_CRC_CLK_ENABLE();
}
void TM_CRC_DeInit(void) {
/* Disable CRC clock */
__HAL_RCC_CRC_CLK_DISABLE();
}
uint32_t TM_CRC_Calculate8(uint8_t* arr, uint32_t count, uint8_t reset) {
uint32_t cnt;
/* Reset CRC data register if necessary */
if (reset) {
/* Reset generator */
CRC->CR = CRC_CR_RESET;
}
/* Calculate number of 32-bit blocks */
cnt = count >> 2;
/* Calculate */
while (cnt--) {
/* Set new value */
CRC->DR = *(uint32_t *)arr;
/* Increase by 4 */
arr += 4;
}
/* Calculate remaining data as 8-bit */
cnt = count % 4;
/* Calculate */
while (cnt--) {
/* Set new value */
*((uint8_t *)&CRC->DR) = *arr++;
}
/* Return data */
return CRC->DR;
}
uint32_t TM_CRC_Calculate16(uint16_t* arr, uint32_t count, uint8_t reset) {
uint32_t cnt;
/* Reset CRC data register if necessary */
if (reset) {
/* Reset generator */
CRC->CR = CRC_CR_RESET;
}
/* Calculate number of 32-bit blocks */
cnt = count >> 1;
/* Calculate */
while (cnt--) {
/* Set new value */
CRC->DR = *(uint32_t *)arr;
/* Increase by 2 */
arr += 2;
}
/* Calculate remaining data as 8-bit */
cnt = count % 4;
/* Calculate */
while (cnt--) {
/* Set new value */
*((uint8_t *)&CRC->DR) = *arr++;
}
/* Return data */
return CRC->DR;
}
uint32_t TM_CRC_Calculate32(uint32_t* arr, uint32_t count, uint8_t reset) {
/* Reset CRC data register if necessary */
if (reset) {
/* Reset generator */
CRC->CR = CRC_CR_RESET;
}
/* Calculate CRC */
while (count--) {
/* Set new value */
CRC->DR = *arr++;
}
/* Return data */
return CRC->DR;
}