tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_Freescale/TARGET_KLXX/TARGET_KL25Z/system_MKL25Z4.h

   1 /*
   2 ** ###################################################################
   3 **     Processor:           MKL25Z128VLK4
   4 **     Compilers:           ARM Compiler
   5 **                          Freescale C/C++ for Embedded ARM
   6 **                          GNU C Compiler
   7 **                          IAR ANSI C/C++ Compiler for ARM
   8 **
   9 **     Reference manual:    KL25RM, Rev.1, Jun 2012
  10 **     Version:             rev. 1.1, 2012-06-21
  11 **
  12 **     Abstract:
  13 **         Provides a system configuration function and a global variable that
  14 **         contains the system frequency. It configures the device and initializes
  15 **         the oscillator (PLL) that is part of the microcontroller device.
  16 **
  17 **     Copyright: 2012 Freescale Semiconductor, Inc. All Rights Reserved.
  18 **
  19 **     http:                 www.freescale.com
  20 **     mail:                 support@freescale.com
  21 **
  22 **     Revisions:
  23 **     - rev. 1.0 (2012-06-13)
  24 **         Initial version.
  25 **     - rev. 1.1 (2012-06-21)
  26 **         Update according to reference manual rev. 1.
  27 **
  28 ** ###################################################################
  29 */
  30
  31 /**
  32  * @file MKL25Z4
  33  * @version 1.1
  34  * @date 2012-06-21
  35  * @brief Device specific configuration file for MKL25Z4 (header file)
  36  *
  37  * Provides a system configuration function and a global variable that contains
  38  * the system frequency. It configures the device and initializes the oscillator
  39  * (PLL) that is part of the microcontroller device.
  40  */
  41
  42 #ifndef SYSTEM_MKL25Z4_H_
  43 #define SYSTEM_MKL25Z4_H_                        /**< Symbol preventing repeated inclusion */
  44
  45 #ifdef __cplusplus
  46 extern "C" {
  47 #endif
  48
  49 #include <stdint.h>
  50
  51 /**
  52  * @brief System clock frequency (core clock)
  53  *
  54  * The system clock frequency supplied to the SysTick timer and the processor
  55  * core clock. This variable can be used by the user application to setup the
  56  * SysTick timer or configure other parameters. It may also be used by debugger to
  57  * query the frequency of the debug timer or configure the trace clock speed
  58  * SystemCoreClock is initialized with a correct predefined value.
  59  */
  60 extern uint32_t SystemCoreClock;
  61
  62 /**
  63  * @brief Setup the microcontroller system.
  64  *
  65  * Typically this function configures the oscillator (PLL) that is part of the
  66  * microcontroller device. For systems with variable clock speed it also updates
  67  * the variable SystemCoreClock. SystemInit is called from startup_device file.
  68  */
  69 void SystemInit (void);
  70
  71 /**
  72  * @brief Updates the SystemCoreClock variable.
  73  *
  74  * It must be called whenever the core clock is changed during program
  75  * execution. SystemCoreClockUpdate() evaluates the clock register settings and calculates
  76  * the current core clock.
  77  */
  78 void SystemCoreClockUpdate (void);
  79
  80 #ifdef __cplusplus
  81 }
  82 #endif
  83
  84 #endif  /* #if !defined(SYSTEM_MKL25Z4_H_) */