mbed library sources
Dependents: frdm_kl05z_gpio_test
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Diff: targets/cmsis/TARGET_Freescale/TARGET_K20D5M/system_MK20D5.h
- Revision:
- 68:41613245dfd7
diff -r 78dfdb5b4d9e -r 41613245dfd7 targets/cmsis/TARGET_Freescale/TARGET_K20D5M/system_MK20D5.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/cmsis/TARGET_Freescale/TARGET_K20D5M/system_MK20D5.h Thu Dec 26 13:00:06 2013 +0000 @@ -0,0 +1,87 @@ +/* +** ################################################################### +** 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_) */