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Diff: targets/cmsis/TARGET_Freescale/TARGET_KLXX/TARGET_KL25Z/system_MKL25Z4.h
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- 82:0b31dbcd4769
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/cmsis/TARGET_Freescale/TARGET_KLXX/TARGET_KL25Z/system_MKL25Z4.h Fri Jan 31 10:00:06 2014 +0000 @@ -0,0 +1,84 @@ +/* +** ################################################################### +** Processor: MKL25Z128VLK4 +** Compilers: ARM Compiler +** Freescale C/C++ for Embedded ARM +** GNU C Compiler +** IAR ANSI C/C++ Compiler for ARM +** +** Reference manual: KL25RM, Rev.1, Jun 2012 +** Version: rev. 1.1, 2012-06-21 +** +** 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 (2012-06-13) +** Initial version. +** - rev. 1.1 (2012-06-21) +** Update according to reference manual rev. 1. +** +** ################################################################### +*/ + +/** + * @file MKL25Z4 + * @version 1.1 + * @date 2012-06-21 + * @brief Device specific configuration file for MKL25Z4 (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_MKL25Z4_H_ +#define SYSTEM_MKL25Z4_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_MKL25Z4_H_) */