Diff: targets/TARGET_Maxim/TARGET_MAX32630/mxc/crc.h

Revision:

157:ff67d9f36b67

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_Maxim/TARGET_MAX32630/mxc/crc.h	Thu Feb 02 17:01:33 2017 +0000
@@ -0,0 +1,191 @@
+/**
+ * @file
+ * @brief   CRC peripheral module function prototypes and data types.
+ */
+
+/* ****************************************************************************
+ * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
+ *
+ * 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 MAXIM INTEGRATED 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.
+ *
+ * Except as contained in this notice, the name of Maxim Integrated
+ * Products, Inc. shall not be used except as stated in the Maxim Integrated
+ * Products, Inc. Branding Policy.
+ *
+ * The mere transfer of this software does not imply any licenses
+ * of trade secrets, proprietary technology, copyrights, patents,
+ * trademarks, maskwork rights, or any other form of intellectual
+ * property whatsoever. Maxim Integrated Products, Inc. retains all
+ * ownership rights.
+ *
+ * $Date: 2016-10-10 16:57:56 -0500 (Mon, 10 Oct 2016) $
+ * $Revision: 24657 $
+ *
+ **************************************************************************** */
+
+/* Define to prevent redundant inclusion */
+#ifndef _CRC_H_
+#define _CRC_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @ingroup periphlibs
+ * @defgroup crc Cyclic Redundancy Check (CRC)
+ * @brief High-level API for CRC Peripheral Module
+ * @{
+ */
+
+/**
+ * @page crc_overview Overview and Usage
+ * @parblock
+ *  - Initialize the CRC for usage by calling either the CRC16_Init() function or the CRC32_Init() funciton
+ *    + For CRC16, CCITT mode is enabled if the parameter is set
+ *    + Select the Endian of the data for calculation
+ *      - passing a 1 sets the module to little endian
+ *      - passing a 0 sets the module to big endian
+ *  - Set the intial CRC seed by calling CRC16_Reseed() or CRC32_Reseed()
+ *    + This is the initial value of the CRC remainder to be used when the data is passed to the module
+ *  - Pass data to the CRC engine using the methods:
+ *    + CRC16_AddData()
+ *    + CRC16_AddDataArray()
+ *    + CRC32_AddData()
+ *    + CRC32_AddDataArray()
+ *      @note any data passed to the add methods of the peripheral is padded with zeros if it is less than 
+ *      32-bits.
+ * @endparblock
+*/
+
+
+/* **** Includes **** */
+#include "mxc_config.h"
+#include <string.h>
+#include "crc_regs.h"
+
+/* **** Definitions **** */
+
+/* **** Globals **** */
+
+/* **** Function Prototypes **** */
+
+/**
+ * @brief Initialize CRC clock and select CRC16 mode and byte order.
+ *
+ * @param CCITT_TRUE    CRC16-CCITT-TRUE = 1, CRC16-CCITT-FALSE = 0
+ * @param lilEndian     byte order, little endian = 1, big endian = 0
+ */
+void CRC16_Init(uint8_t CCITT_TRUE, uint8_t lilEndian);
+
+/**
+ * @brief Initialize CRC clock and select byte order for CRC32.
+ * 
+ * @param lilEndian  byte order, little endian = 1, big endian = 0
+ */
+void CRC32_Init(uint8_t lilEndian);
+
+/**
+ * @brief Initialize CRC16 calculation.
+ *
+ * @param initData intial remainder to start the CRC16 calculation with
+ */
+void CRC16_Reseed(uint16_t initData);
+
+/**
+ * @brief Initialize CRC32 calculation.
+ *
+ * @param initData intial remainder to start the CRC32 calculation with
+ */
+void CRC32_Reseed(uint32_t initData);
+
+/**
+ * @brief Add data to the CRC16 calculation.
+ *
+ * @param data    data to add to the CRC16 calculation
+ * @note  data is padded with zeros if less than 32bits.
+ */
+__STATIC_INLINE void CRC16_AddData(uint32_t data)
+{
+    MXC_CRC_DATA->value16[0] = data;
+}
+
+/**
+ * @brief Add data to the CRC32 calculation
+ *
+ * @param data    data to add to the CRC32 calculation
+ * @note  data is padded with zeros if less than 32bits
+ */
+__STATIC_INLINE void CRC32_AddData(uint32_t data)
+{
+    MXC_CRC_DATA->value32[0] = data;
+}
+
+/**
+ * @brief Add an array of data to the CRC16 calculation
+ *
+ * @param data          pointer to array of data
+ * @note  data is padded with zeros if less than 32bits
+ * 
+ * @param arrayLength   number of elements in array
+ */
+__STATIC_INLINE void CRC16_AddDataArray(uint32_t *data, uint32_t arrayLength)
+{
+    memcpy((void *)(&(MXC_CRC_DATA->value16)), (void *)data, arrayLength * sizeof(data[0]));
+}
+
+/**
+ * @brief Add an array of data to the CRC32 calculation
+ *
+ * @param data          pointer to array of data
+ * @note  data is padded with zeros if less than 32bits
+ * @param arrayLength   number of elements in array
+ */
+__STATIC_INLINE void CRC32_AddDataArray(uint32_t *data, uint32_t arrayLength)
+{
+    memcpy((void *)(&(MXC_CRC_DATA->value32)), (void *)data, arrayLength * sizeof(data[0]));
+}
+
+/**
+ * @brief Get the calculated CRC16 value
+ *
+ * @return CRC16 value
+ */
+__STATIC_INLINE uint32_t CRC16_GetCRC()
+{
+    return MXC_CRC_DATA->value16[0];
+}
+
+/**
+ * @brief Get the calculated CRC32 value
+ *
+ * @return CRC32 value
+ */
+__STATIC_INLINE uint32_t CRC32_GetCRC()
+{
+    return MXC_CRC_DATA->value32[0];
+}
+
+/**@} end of crc group */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _CRC_H_ */