Core kernel files:

[freertos] / FreeRTOS / Demo / CORTEX_A5_SAMA5D4x_EK_IAR / AtmelFiles / libchip_sama5d4x / source / wdt.c

diff --git a/FreeRTOS/Demo/CORTEX_A5_SAMA5D4x_EK_IAR/AtmelFiles/libchip_sama5d4x/source/wdt.c b/FreeRTOS/Demo/CORTEX_A5_SAMA5D4x_EK_IAR/AtmelFiles/libchip_sama5d4x/source/wdt.c
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+/* ----------------------------------------------------------------------------\r
+ *        SAM Software Package License \r
+ * ----------------------------------------------------------------------------\r
+ * Copyright (c) 2013, Atmel Corporation\r
+ *\r
+ * All rights reserved.\r
+ *\r
+ * Redistribution and use in source and binary forms, with or without\r
+ * modification, are permitted provided that the following conditions are met:\r
+ *\r
+ * - Redistributions of source code must retain the above copyright notice,\r
+ * this list of conditions and the disclaimer below.\r
+ *\r
+ * Atmel's name may not be used to endorse or promote products derived from\r
+ * this software without specific prior written permission.\r
+ *\r
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR\r
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF\r
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE\r
+ * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,\r
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT\r
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,\r
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF\r
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING\r
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,\r
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.\r
+ * ----------------------------------------------------------------------------\r
+ */\r
+\r
+/**\r
+ * \file\r
+ *\r
+ * Implementation of Watchdog Timer (WDT) controller.\r
+ *\r
+ */\r
+\r
+/** \addtogroup wdt_module Working with WDT\r
+ * The WDT driver provides the interface to configure and use the WDT\r
+ * peripheral.\r
+ *\r
+ * The WDT can be used to prevent system lock-up if the software becomes\r
+ * trapped in a deadlock. It can generate a general reset or a processor\r
+ * reset only. It is clocked by slow clock divided by 128.\r
+ *\r
+ * The WDT is running at reset with 16 seconds watchdog period (slow clock at 32.768 kHz)\r
+ * and external reset generation enabled. The user must either disable it or\r
+ * reprogram it to meet the application requires.\r
+ *\r
+ * To use the WDT, the user could follow these few steps:\r
+ * <ul>\r
+ * <li>Enable watchdog with given mode using \ref WDT_Enable().\r
+ * <li>Restart the watchdog using \ref WDT_Restart() within the watchdog period.\r
+ * </ul>\r
+ *\r
+ * For more accurate information, please look at the WDT section of the\r
+ * Datasheet.\r
+ *\r
+ * \note\r
+ * The Watchdog Mode Register (WDT_MR) can be written only once.\n\r
+ *\r
+ * Related files :\n\r
+ * \ref wdt.c\n\r
+ * \ref wdt.h.\n\r
+ */\r
+/*@{*/\r
+/*@}*/\r
+\r
+/*---------------------------------------------------------------------------\r
+ *        Headers\r
+ *---------------------------------------------------------------------------*/\r
+\r
+#include "chip.h"\r
+\r
+#include <stdint.h>\r
+\r
+/*----------------------------------------------------------------------------\r
+ *        Exported functions\r
+ *----------------------------------------------------------------------------*/\r
+\r
+/**\r
+ * \brief Enable watchdog with given mode.\r
+ *\r
+ * \note The Watchdog Mode Register (WDT_MR) can be written only once.\r
+ * Only a processor reset resets it.\r
+ *\r
+ * \param dwMode   WDT mode to be set\r
+ */\r
+extern void WDT_Enable( Wdt* pWDT, uint32_t dwMode )\r
+{\r
+    pWDT->WDT_MR = dwMode ;\r
+}\r
+\r
+/**\r
+ * \brief Disable watchdog.\r
+ *\r
+ * \note The Watchdog Mode Register (WDT_MR) can be written only once.\r
+ * Only a processor reset resets it.\r
+ */\r
+extern void WDT_Disable( Wdt* pWDT )\r
+{\r
+    pWDT->WDT_MR = WDT_MR_WDDIS;\r
+}\r
+\r
+/**\r
+ * \brief Watchdog restart.\r
+ */\r
+extern void WDT_Restart( Wdt* pWDT )\r
+{\r
+    pWDT->WDT_CR = 0xA5000001;\r
+}\r
+\r
+/**\r
+ * \brief Watchdog get status.\r
+ */\r
+extern uint32_t WDT_GetStatus( Wdt* pWDT )\r
+{\r
+    return (pWDT->WDT_SR & 0x3) ;\r
+}\r
+\r
+/**\r
+ * \brief Watchdog get status.\r
+ */\r
+extern uint32_t WDT_GetCounterValue( Wdt* pWDT )\r
+{\r
+    return (pWDT->WDT_MR & WDT_MR_WDV_Msk) ;\r
+}\r
+\r
+/**\r
+ * \brief Watchdog get period.\r
+ *\r
+ * \param dwMs   desired watchdog period in millisecond.\r
+ */\r
+extern uint32_t WDT_GetPeriod( uint32_t dwMs )\r
+{\r
+    if ( (dwMs < 4) || (dwMs > 16000) )\r
+    {\r
+        return 0 ;\r
+    }\r
+    return ((dwMs << 8) / 1000) ;\r
+}\r