system_MKL25Z4.h

00001 /*
00002 ** ###################################################################
00003 **     Processor:           MKL25Z128VLK4
00004 **     Compilers:           ARM Compiler
00005 **                          Freescale C/C++ for Embedded ARM
00006 **                          GNU C Compiler
00007 **                          IAR ANSI C/C++ Compiler for ARM
00008 **
00009 **     Reference manual:    KL25RM, Rev.1, Jun 2012
00010 **     Version:             rev. 1.1, 2012-06-21
00011 **
00012 **     Abstract:
00013 **         Provides a system configuration function and a global variable that
00014 **         contains the system frequency. It configures the device and initializes
00015 **         the oscillator (PLL) that is part of the microcontroller device.
00016 **
00017 **     Copyright: 2012 Freescale Semiconductor, Inc. All Rights Reserved.
00018 **
00019 **     http:                 www.freescale.com
00020 **     mail:                 support@freescale.com
00021 **
00022 **     Revisions:
00023 **     - rev. 1.0 (2012-06-13)
00024 **         Initial version.
00025 **     - rev. 1.1 (2012-06-21)
00026 **         Update according to reference manual rev. 1.
00027 **
00028 ** ###################################################################
00029 */
00030 
00031 /**
00032  * @file MKL25Z4
00033  * @version 1.1
00034  * @date 2012-06-21
00035  * @brief Device specific configuration file for MKL25Z4 (header file)
00036  *
00037  * Provides a system configuration function and a global variable that contains
00038  * the system frequency. It configures the device and initializes the oscillator
00039  * (PLL) that is part of the microcontroller device.
00040  */
00041 
00042 #ifndef SYSTEM_MKL25Z4_H_
00043 #define SYSTEM_MKL25Z4_H_                        /**< Symbol preventing repeated inclusion */
00044 
00045 #ifdef __cplusplus
00046 extern "C" {
00047 #endif
00048 
00049 #include <stdint.h>
00050 
00051 /**
00052  * @brief System clock frequency (core clock)
00053  *
00054  * The system clock frequency supplied to the SysTick timer and the processor
00055  * core clock. This variable can be used by the user application to setup the
00056  * SysTick timer or configure other parameters. It may also be used by debugger to
00057  * query the frequency of the debug timer or configure the trace clock speed
00058  * SystemCoreClock is initialized with a correct predefined value.
00059  */
00060 extern uint32_t SystemCoreClock;
00061 
00062 /**
00063  * @brief Setup the microcontroller system.
00064  *
00065  * Typically this function configures the oscillator (PLL) that is part of the
00066  * microcontroller device. For systems with variable clock speed it also updates
00067  * the variable SystemCoreClock. SystemInit is called from startup_device file.
00068  */
00069 void SystemInit (void);
00070 
00071 /**
00072  * @brief Updates the SystemCoreClock variable.
00073  *
00074  * It must be called whenever the core clock is changed during program
00075  * execution. SystemCoreClockUpdate() evaluates the clock register settings and calculates
00076  * the current core clock.
00077  */
00078 void SystemCoreClockUpdate (void);
00079 
00080 #ifdef __cplusplus
00081 }
00082 #endif
00083 
00084 #endif  /* #if !defined(SYSTEM_MKL25Z4_H_) */