1 /* 2 ** ################################################################### 3 ** Processors: MK26FN2M0CAC18 4 ** MK26FN2M0VLQ18 5 ** MK26FN2M0VMD18 6 ** MK26FN2M0VMI18 7 ** 8 ** Compilers: Freescale C/C++ for Embedded ARM 9 ** GNU C Compiler 10 ** IAR ANSI C/C++ Compiler for ARM 11 ** Keil ARM C/C++ Compiler 12 ** MCUXpresso Compiler 13 ** 14 ** Reference manual: MK26P169M180SF5RM, Rev. 1, Mar 2015 15 ** Version: rev. 2.0, 2015-03-25 16 ** Build: b201013 17 ** 18 ** Abstract: 19 ** Provides a system configuration function and a global variable that 20 ** contains the system frequency. It configures the device and initializes 21 ** the oscillator (PLL) that is part of the microcontroller device. 22 ** 23 ** Copyright 2016 Freescale Semiconductor, Inc. 24 ** Copyright 2016-2020 NXP 25 ** All rights reserved. 26 ** 27 ** SPDX-License-Identifier: BSD-3-Clause 28 ** 29 ** http: www.nxp.com 30 ** mail: support@nxp.com 31 ** 32 ** Revisions: 33 ** - rev. 1.0 (2014-12-04) 34 ** Initial version. 35 ** - rev. 1.1 (2015-02-19) 36 ** Renamed interrupt vector LLW to LLWU. 37 ** - rev. 2.0 (2015-03-25) 38 ** Registers updated according to the reference manual revision 1, March 2015 39 ** 40 ** ################################################################### 41 */ 42 43 /*! 44 * @file MK26F18 45 * @version 2.0 46 * @date 2015-03-25 47 * @brief Device specific configuration file for MK26F18 (header file) 48 * 49 * Provides a system configuration function and a global variable that contains 50 * the system frequency. It configures the device and initializes the oscillator 51 * (PLL) that is part of the microcontroller device. 52 */ 53 54 #ifndef _SYSTEM_MK26F18_H_ 55 #define _SYSTEM_MK26F18_H_ /**< Symbol preventing repeated inclusion */ 56 57 #ifdef __cplusplus 58 extern "C" { 59 #endif 60 61 #include <stdint.h> 62 63 64 #ifndef DISABLE_WDOG 65 #define DISABLE_WDOG 1 66 #endif 67 68 /* Define clock source values */ 69 70 #define CPU_XTAL_CLK_HZ 16000000U /* Value of the external crystal or oscillator clock frequency of the system oscillator (OSC) in Hz */ 71 #define CPU_XTAL32k_CLK_HZ 32768U /* Value of the external 32k crystal or oscillator clock frequency of the RTC in Hz */ 72 #define CPU_INT_SLOW_CLK_HZ 32768U /* Value of the slow internal oscillator clock frequency in Hz */ 73 #define CPU_INT_FAST_CLK_HZ 4000000U /* Value of the fast internal oscillator clock frequency in Hz */ 74 #define CPU_INT_IRC_CLK_HZ 48000000U /* Value of the 48M internal oscillator clock frequency in Hz */ 75 76 /* RTC oscillator setting */ 77 /* RTC_CR: SC2P=0,SC4P=0,SC8P=0,SC16P=0,CLKO=1,OSCE=1,WPS=0,UM=0,SUP=0,WPE=0,SWR=0 */ 78 #define SYSTEM_RTC_CR_VALUE 0x0300U /* RTC_CR */ 79 80 /* Low power mode enable */ 81 /* SMC_PMPROT: AHSRUN=1,AVLP=1,ALLS=1,AVLLS=1 */ 82 #define SYSTEM_SMC_PMPROT_VALUE 0xAAU /* SMC_PMPROT */ 83 84 #define DEFAULT_SYSTEM_CLOCK 20971520u 85 86 87 /** 88 * @brief System clock frequency (core clock) 89 * 90 * The system clock frequency supplied to the SysTick timer and the processor 91 * core clock. This variable can be used by the user application to setup the 92 * SysTick timer or configure other parameters. It may also be used by debugger to 93 * query the frequency of the debug timer or configure the trace clock speed 94 * SystemCoreClock is initialized with a correct predefined value. 95 */ 96 extern uint32_t SystemCoreClock; 97 98 /** 99 * @brief Setup the microcontroller system. 100 * 101 * Typically this function configures the oscillator (PLL) that is part of the 102 * microcontroller device. For systems with variable clock speed it also updates 103 * the variable SystemCoreClock. SystemInit is called from startup_device file. 104 */ 105 void SystemInit (void); 106 107 /** 108 * @brief Updates the SystemCoreClock variable. 109 * 110 * It must be called whenever the core clock is changed during program 111 * execution. SystemCoreClockUpdate() evaluates the clock register settings and calculates 112 * the current core clock. 113 */ 114 void SystemCoreClockUpdate (void); 115 116 /** 117 * @brief SystemInit function hook. 118 * 119 * This weak function allows to call specific initialization code during the 120 * SystemInit() execution.This can be used when an application specific code needs 121 * to be called as close to the reset entry as possible (for example the Multicore 122 * Manager MCMGR_EarlyInit() function call). 123 * NOTE: No global r/w variables can be used in this hook function because the 124 * initialization of these variables happens after this function. 125 */ 126 void SystemInitHook (void); 127 128 #ifdef __cplusplus 129 } 130 #endif 131 132 #endif /* _SYSTEM_MK26F18_H_ */ 133
