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libraries/sdk/Peripheral/ch32v30x_crc.c

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+/********************************** (C) COPYRIGHT  *******************************
+* File Name          : ch32v30x_crc.c
+* Author             : WCH
+* Version            : V1.0.0
+* Date               : 2021/06/06
+* Description        : This file provides all the CRC firmware functions.
+* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
+* SPDX-License-Identifier: Apache-2.0
+*******************************************************************************/
+#include "ch32v30x_crc.h"
+
+/*********************************************************************
+ * @fn      CRC_ResetDR
+ *
+ * @brief   Resets the CRC Data register (DR).
+ *
+ * @return  none
+ */
+void CRC_ResetDR(void)
+{
+    CRC->CTLR = CRC_CTLR_RESET;
+}
+
+/*********************************************************************
+ * @fn      CRC_CalcCRC
+ *
+ * @brief   Computes the 32-bit CRC of a given data word(32-bit).
+ *
+ * @param   Data - data word(32-bit) to compute its CRC.
+ *
+ * @return  32-bit CRC.
+ */
+uint32_t CRC_CalcCRC(uint32_t Data)
+{
+    CRC->DATAR = Data;
+
+    return (CRC->DATAR);
+}
+
+/*********************************************************************
+ * @fn      CRC_CalcBlockCRC
+ *
+ * @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.
+ *          BufferLength - length of the buffer to be computed.
+ *
+ * @return  32-bit CRC.
+ */
+uint32_t CRC_CalcBlockCRC(uint32_t pBuffer[], uint32_t BufferLength)
+{
+    uint32_t index = 0;
+
+    for(index = 0; index < BufferLength; index++)
+    {
+        CRC->DATAR = pBuffer[index];
+    }
+
+    return (CRC->DATAR);
+}
+
+/*********************************************************************
+ * @fn      CRC_GetCRC
+ *
+ * @brief   Returns the current CRC value.
+ *
+ * @return  32-bit CRC.
+ */
+uint32_t CRC_GetCRC(void)
+{
+    return (CRC->DATAR);
+}
+
+/*********************************************************************
+ * @fn      CRC_SetIDRegister
+ *
+ * @brief   Stores a 8-bit data in the Independent Data(ID) register.
+ *
+ * @param   IDValue - 8-bit value to be stored in the ID register.
+ *
+ * @return  none
+ */
+void CRC_SetIDRegister(uint8_t IDValue)
+{
+    CRC->IDATAR = IDValue;
+}
+
+/*********************************************************************
+ * @fn      CRC_GetIDRegister
+ *
+ * @brief   Returns the 8-bit data stored in the Independent Data(ID) register.
+ *
+ * @return  8-bit value of the ID register.
+ */
+uint8_t CRC_GetIDRegister(void)
+{
+    return (CRC->IDATAR);
+}