Diff: TARGET_K20D50M/system_MK20D5.h

Revision:

87:6213f644d804

Child:

93:e188a91d3eaa

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+++ b/TARGET_K20D50M/system_MK20D5.h	Fri Jul 25 09:46:51 2014 +0100
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+/*
+** ###################################################################
+**     Compilers:           ARM Compiler
+**                          Freescale C/C++ for Embedded ARM
+**                          GNU C Compiler
+**                          IAR ANSI C/C++ Compiler for ARM
+**
+**     Reference manuals:   K20P64M50SF0RM Rev. 1, Oct 2011
+**                          K20P32M50SF0RM Rev. 1, Oct 2011
+**                          K20P48M50SF0RM Rev. 1, Oct 2011
+**
+**     Version:             rev. 2.0, 2012-03-19
+**
+**     Abstract:
+**         Provides a system configuration function and a global variable that
+**         contains the system frequency. It configures the device and initializes
+**         the oscillator (PLL) that is part of the microcontroller device.
+**
+**     Copyright: 2012 Freescale Semiconductor, Inc. All Rights Reserved.
+**
+**     http:                 www.freescale.com
+**     mail:                 support@freescale.com
+**
+**     Revisions:
+**     - rev. 1.0 (2011-12-15)
+**         Initial version
+**     - rev. 2.0 (2012-03-19)
+**         PDB Peripheral register structure updated.
+**         DMA Registers and bits for unsupported DMA channels removed.
+**
+** ###################################################################
+*/
+
+/**
+ * @file MK20D5
+ * @version 2.0
+ * @date 2012-03-19
+ * @brief Device specific configuration file for MK20D5 (header file)
+ *
+ * Provides a system configuration function and a global variable that contains
+ * the system frequency. It configures the device and initializes the oscillator
+ * (PLL) that is part of the microcontroller device.
+ */
+
+#ifndef SYSTEM_MK20D5_H_
+#define SYSTEM_MK20D5_H_                         /**< Symbol preventing repeated inclusion */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+
+/**
+ * @brief System clock frequency (core clock)
+ *
+ * The system clock frequency supplied to the SysTick timer and the processor
+ * core clock. This variable can be used by the user application to setup the
+ * SysTick timer or configure other parameters. It may also be used by debugger to
+ * query the frequency of the debug timer or configure the trace clock speed
+ * SystemCoreClock is initialized with a correct predefined value.
+ */
+extern uint32_t SystemCoreClock;
+
+/**
+ * @brief Setup the microcontroller system.
+ *
+ * Typically this function configures the oscillator (PLL) that is part of the
+ * microcontroller device. For systems with variable clock speed it also updates
+ * the variable SystemCoreClock. SystemInit is called from startup_device file.
+ */
+void SystemInit (void);
+
+/**
+ * @brief Updates the SystemCoreClock variable.
+ *
+ * It must be called whenever the core clock is changed during program
+ * execution. SystemCoreClockUpdate() evaluates the clock register settings and calculates
+ * the current core clock.
+ */
+void SystemCoreClockUpdate (void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  /* #if !defined(SYSTEM_MK20D5_H_) */