tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_Freescale/TARGET_K20XX/TARGET_K20D50M/system_MK20D5.h

   1 /*
   2 ** ###################################################################
   3 **     Compilers:           ARM Compiler
   4 **                          Freescale C/C++ for Embedded ARM
   5 **                          GNU C Compiler
   6 **                          IAR ANSI C/C++ Compiler for ARM
   7 **
   8 **     Reference manuals:   K20P64M50SF0RM Rev. 1, Oct 2011
   9 **                          K20P32M50SF0RM Rev. 1, Oct 2011
  10 **                          K20P48M50SF0RM Rev. 1, Oct 2011
  11 **
  12 **     Version:             rev. 2.0, 2012-03-19
  13 **
  14 **     Abstract:
  15 **         Provides a system configuration function and a global variable that
  16 **         contains the system frequency. It configures the device and initializes
  17 **         the oscillator (PLL) that is part of the microcontroller device.
  18 **
  19 **     Copyright: 2015 Freescale Semiconductor, Inc. All Rights Reserved.
  20 **
  21 **     http:                 www.freescale.com
  22 **     mail:                 support@freescale.com
  23 **
  24 **     Revisions:
  25 **     - rev. 1.0 (2011-12-15)
  26 **         Initial version
  27 **     - rev. 2.0 (2012-03-19)
  28 **         PDB Peripheral register structure updated.
  29 **         DMA Registers and bits for unsupported DMA channels removed.
  30 **
  31 ** ###################################################################
  32 */
  33
  34 /**
  35  * @file MK20D5
  36  * @version 2.0
  37  * @date 2012-03-19
  38  * @brief Device specific configuration file for MK20D5 (header file)
  39  *
  40  * Provides a system configuration function and a global variable that contains
  41  * the system frequency. It configures the device and initializes the oscillator
  42  * (PLL) that is part of the microcontroller device.
  43  */
  44
  45 #ifndef SYSTEM_MK20D5_H_
  46 #define SYSTEM_MK20D5_H_                         /**< Symbol preventing repeated inclusion */
  47
  48 #ifdef __cplusplus
  49 extern "C" {
  50 #endif
  51
  52 #include <stdint.h>
  53
  54 /**
  55  * @brief System clock frequency (core clock)
  56  *
  57  * The system clock frequency supplied to the SysTick timer and the processor
  58  * core clock. This variable can be used by the user application to setup the
  59  * SysTick timer or configure other parameters. It may also be used by debugger to
  60  * query the frequency of the debug timer or configure the trace clock speed
  61  * SystemCoreClock is initialized with a correct predefined value.
  62  */
  63 extern uint32_t SystemCoreClock;
  64
  65 /**
  66  * @brief Setup the microcontroller system.
  67  *
  68  * Typically this function configures the oscillator (PLL) that is part of the
  69  * microcontroller device. For systems with variable clock speed it also updates
  70  * the variable SystemCoreClock. SystemInit is called from startup_device file.
  71  */
  72 void SystemInit (void);
  73
  74 /**
  75  * @brief Updates the SystemCoreClock variable.
  76  *
  77  * It must be called whenever the core clock is changed during program
  78  * execution. SystemCoreClockUpdate() evaluates the clock register settings and calculates
  79  * the current core clock.
  80  */
  81 void SystemCoreClockUpdate (void);
  82
  83 #ifdef __cplusplus
  84 }
  85 #endif
  86
  87 #endif  /* #if !defined(SYSTEM_MK20D5_H_) */