/*
** ###################################################################
**     Processors:          MKW21Z256VHT4
**                          MKW21Z512VHT4
**
**     Compilers:           Keil ARM C/C++ Compiler
**                          GNU C Compiler
**                          IAR ANSI C/C++ Compiler for ARM
**
**     Reference manual:    MKW41Z512RM Rev. 0.1, 04/2016
**     Version:             rev. 1.0, 2015-09-23
**     Build:               b160720
**
**     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 (c) 2016 Freescale Semiconductor, Inc.
**     All rights reserved.
**
**     Redistribution and use in source and binary forms, with or without modification,
**     are permitted provided that the following conditions are met:
**
**     o Redistributions of source code must retain the above copyright notice, this list
**       of conditions and the following disclaimer.
**
**     o Redistributions in binary form must reproduce the above copyright notice, this
**       list of conditions and the following disclaimer in the documentation and/or
**       other materials provided with the distribution.
**
**     o Neither the name of Freescale Semiconductor, Inc. nor the names of its
**       contributors may be used to endorse or promote products derived from this
**       software without specific prior written permission.
**
**     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
**     ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
**     WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
**     DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
**     ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
**     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
**     LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
**     ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
**     (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
**     SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**
**     http:                 www.freescale.com
**     mail:                 support@freescale.com
**
**     Revisions:
**     - rev. 1.0 (2015-09-23)
**         Initial version.
**
** ###################################################################
*/

/*!
 * @file MKW21Z4
 * @version 1.0
 * @date 2015-09-23
 * @brief Device specific configuration file for MKW21Z4 (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_MKW21Z4_H_
#define _SYSTEM_MKW21Z4_H_                       /**< Symbol preventing repeated inclusion */

#ifdef __cplusplus
extern "C" {
#endif

#include <stdint.h>


#ifndef DISABLE_WDOG
  #define DISABLE_WDOG                 1
#endif

/* Define clock source values */

#define CPU_XTAL_CLK_HZ                32000000u           /* Value of the external crystal or oscillator clock frequency in Hz */
#define CPU_XTAL32k_CLK_HZ             32768u              /* Value of the external 32k crystal or oscillator clock frequency in Hz */
#define CPU_INT_SLOW_CLK_HZ            32768u              /* Value of the slow internal oscillator clock frequency in Hz  */
#define CPU_INT_FAST_CLK_HZ            4000000u            /* Value of the fast internal oscillator clock frequency in Hz  */

/* RF oscillator setting */
#define SYSTEM_RSIM_CONTROL_VALUE      0xC00100U           /* Enable RF oscillator in Run/Wait mode */

/* Low power mode enable */

/* SMC_PMPROT: ?=0,?=0,AVLP=1,?=0,?=0,?=0,AVLLS=1,?=0 */
#define SYSTEM_SMC_PMPROT_VALUE        (SMC_PMPROT_AVLP_MASK | SMC_PMPROT_ALLS_MASK | SMC_PMPROT_AVLLS_MASK) /* Mask of allowed low power modes used to initialize power modes protection register */

#define DEFAULT_SYSTEM_CLOCK           20971520U           /* Default System clock value */


/**
 * @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  /* _SYSTEM_MKW21Z4_H_ */