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digistump-sam/system/libsam/include/timetick.h

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+/* ----------------------------------------------------------------------------
+ *         SAM Software Package License
+ * ----------------------------------------------------------------------------
+ * Copyright (c) 2011-2012, Atmel Corporation
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following condition is met:
+ *
+ * - Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the disclaimer below.
+ *
+ * Atmel's name may not be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
+ * DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
+ * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
+ * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * ----------------------------------------------------------------------------
+ */
+
+/**
+ *  \file
+ *
+ *  \par Purpose
+ *
+ *  Methods and definitions for Global time tick and wait functions.
+ *
+ *  Defines a common and simpliest use of Time Tick, to increase tickCount
+ *  every 1ms, the application can get this value through GetTickCount().
+ *
+ *  \par Usage
+ *
+ *  -# Configure the System Tick with TimeTick_Configure() when MCK changed
+ *     \note
+ *     Must be done before any invoke of GetTickCount(), Wait() or Sleep().
+ *  -# Uses GetTickCount to get current tick value.
+ *  -# Uses Wait to wait several ms.
+ *  -# Uses Sleep to enter wait for interrupt mode to wait several ms.
+ *
+ */
+
+#ifndef _TIMETICK_
+#define _TIMETICK_
+
+/*----------------------------------------------------------------------------
+ *         Headers
+ *----------------------------------------------------------------------------*/
+
+#include <stdint.h>
+
+/*----------------------------------------------------------------------------
+ *         Definitions
+ *----------------------------------------------------------------------------*/
+
+/*----------------------------------------------------------------------------
+ *         Global functions
+ *----------------------------------------------------------------------------*/
+
+extern uint32_t TimeTick_Configure( uint32_t dwNew_MCK ) ;
+
+extern void TimeTick_Increment( void ) ;
+
+extern uint32_t GetTickCount( void ) ;
+
+extern void Wait( volatile uint32_t dwMs ) ;
+
+extern void Sleep( volatile uint32_t dwMs ) ;
+
+#endif /* _TIMETICK_ */