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

Revision:

157:ff67d9f36b67

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/targets/TARGET_Maxim/TARGET_MAX32630/mxc/crc.c	Thu Feb 02 17:01:33 2017 +0000
@@ -0,0 +1,108 @@
+/**
+ * @file
+ * @brief   This file contains the function implementations for the Cyclic 
+ *          Redundency Check (CRC) peripheral module. 
+ */
+
+/* ****************************************************************************
+ * 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: 2016-09-09 11:49:04 -0500 (Fri, 09 Sep 2016) $
+ * $Revision: 24339 $
+ *
+ *************************************************************************** */
+
+/* **** Includes **** */
+#include "crc.h"
+
+/**
+ * @ingroup crc
+ * @{
+ */
+
+/* **** Definitions **** */
+
+/* **** Globals **** */
+
+/* **** Functions **** */
+
+/* ************************************************************************* */
+void CRC16_Init(uint8_t CCITT_TRUE, uint8_t lilEndian)
+{
+    if(CCITT_TRUE)
+        MXC_CRC->reseed |= MXC_F_CRC_RESEED_CCITT_MODE;
+    else
+        MXC_CRC->reseed &= ~MXC_F_CRC_RESEED_CCITT_MODE;
+
+    if(lilEndian)
+        MXC_CRC->reseed |= MXC_F_CRC_RESEED_REV_ENDIAN16;
+    else
+        MXC_CRC->reseed &= ~MXC_F_CRC_RESEED_REV_ENDIAN16;
+}
+
+/* ************************************************************************* */
+void CRC32_Init(uint8_t lilEndian)
+{
+    if(lilEndian)
+        MXC_CRC->reseed |= MXC_F_CRC_RESEED_REV_ENDIAN32;
+    else
+        MXC_CRC->reseed &= ~MXC_F_CRC_RESEED_REV_ENDIAN32;
+}
+
+/* ************************************************************************* */
+
+void CRC16_Reseed(uint16_t initData)
+{
+    //set initial value
+    MXC_CRC->seed16 = initData;
+
+    //reseed the CRC16 generator
+    MXC_CRC->reseed |= MXC_F_CRC_RESEED_CRC16;
+
+    //wait for reseed to clear itself
+    while(MXC_CRC->reseed & MXC_F_CRC_RESEED_CRC16);
+
+}
+
+/* ************************************************************************* */
+void CRC32_Reseed(uint32_t initData)
+{
+    //set initial value
+    MXC_CRC->seed32 = initData;
+
+    //reseed the CRC16 generator
+    MXC_CRC->reseed |= MXC_F_CRC_RESEED_CRC32;
+
+    //wait for reseed to clear itself
+    while(MXC_CRC->reseed & MXC_F_CRC_RESEED_CRC32);
+}
+
+/**@} end of group crc */