STM32F4: Libraries

lib/main/STM32F4xx_StdPeriph_Driver/src/stm32f4xx_crc.c

@@ -0,0 +1,133 @@
+/**
+  ******************************************************************************
+  * @file    stm32f4xx_crc.c
+  * @author  MCD Application Team
+  * @version V1.6.1
+  * @date    21-October-2015
+  * @brief   This file provides all the CRC firmware functions.
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT 2015 STMicroelectronics</center></h2>
+  *
+  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
+  * You may not use this file except in compliance with the License.
+  * You may obtain a copy of the License at:
+  *
+  *        http://www.st.com/software_license_agreement_liberty_v2
+  *
+  * Unless required by applicable law or agreed to in writing, software 
+  * distributed under the License is distributed on an "AS IS" BASIS, 
+  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  * See the License for the specific language governing permissions and
+  * limitations under the License.
+  *
+  ******************************************************************************
+  */
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f4xx_crc.h"
+
+/** @addtogroup STM32F4xx_StdPeriph_Driver
+  * @{
+  */
+
+/** @defgroup CRC 
+  * @brief CRC driver modules
+  * @{
+  */
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/* Private functions ---------------------------------------------------------*/
+
+/** @defgroup CRC_Private_Functions
+  * @{
+  */
+
+/**
+  * @brief  Resets the CRC Data register (DR).
+  * @param  None
+  * @retval None
+  */
+void CRC_ResetDR(void)
+{
+  /* Reset CRC generator */
+  CRC->CR = CRC_CR_RESET;
+}
+
+/**
+  * @brief  Computes the 32-bit CRC of a given data word(32-bit).
+  * @param  Data: data word(32-bit) to compute its CRC
+  * @retval 32-bit CRC
+  */
+uint32_t CRC_CalcCRC(uint32_t Data)
+{
+  CRC->DR = Data;
+  
+  return (CRC->DR);
+}
+
+/**
+  * @brief  Computes the 32-bit CRC of a given buffer of data word(32-bit).
+  * @param  pBuffer: pointer to the buffer containing the data to be computed
+  * @param  BufferLength: length of the buffer to be computed					
+  * @retval 32-bit CRC
+  */
+uint32_t CRC_CalcBlockCRC(uint32_t pBuffer[], uint32_t BufferLength)
+{
+  uint32_t index = 0;
+  
+  for(index = 0; index < BufferLength; index++)
+  {
+    CRC->DR = pBuffer[index];
+  }
+  return (CRC->DR);
+}
+
+/**
+  * @brief  Returns the current CRC value.
+  * @param  None
+  * @retval 32-bit CRC
+  */
+uint32_t CRC_GetCRC(void)
+{
+  return (CRC->DR);
+}
+
+/**
+  * @brief  Stores a 8-bit data in the Independent Data(ID) register.
+  * @param  IDValue: 8-bit value to be stored in the ID register 					
+  * @retval None
+  */
+void CRC_SetIDRegister(uint8_t IDValue)
+{
+  CRC->IDR = IDValue;
+}
+
+/**
+  * @brief  Returns the 8-bit data stored in the Independent Data(ID) register
+  * @param  None
+  * @retval 8-bit value of the ID register 
+  */
+uint8_t CRC_GetIDRegister(void)
+{
+  return (CRC->IDR);
+}
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/