1 /* 2 ** ################################################################### 3 ** Processors: MIMXRT1021CAF4A 4 ** MIMXRT1021CAF4B 5 ** MIMXRT1021CAG4A 6 ** MIMXRT1021CAG4B 7 ** MIMXRT1021DAF5A 8 ** MIMXRT1021DAF5B 9 ** MIMXRT1021DAG5A 10 ** MIMXRT1021DAG5B 11 ** 12 ** Compilers: Freescale C/C++ for Embedded ARM 13 ** GNU C Compiler 14 ** IAR ANSI C/C++ Compiler for ARM 15 ** Keil ARM C/C++ Compiler 16 ** MCUXpresso Compiler 17 ** 18 ** Reference manual: IMXRT1020RM Rev.2, 01/2021 | IMXRT102XSRM Rev.0 19 ** Version: rev. 1.2, 2021-08-10 20 ** Build: b230821 21 ** 22 ** Abstract: 23 ** Provides a system configuration function and a global variable that 24 ** contains the system frequency. It configures the device and initializes 25 ** the oscillator (PLL) that is part of the microcontroller device. 26 ** 27 ** Copyright 2016 Freescale Semiconductor, Inc. 28 ** Copyright 2016-2023 NXP 29 ** SPDX-License-Identifier: BSD-3-Clause 30 ** 31 ** http: www.nxp.com 32 ** mail: support@nxp.com 33 ** 34 ** Revisions: 35 ** - rev. 0.1 (2017-11-06) 36 ** Initial version. 37 ** - rev. 1.0 (2018-11-27) 38 ** Update header files to align with IMXRT1020RM Rev.1. 39 ** - rev. 1.1 (2019-04-29) 40 ** Add SET/CLR/TOG register group to register CTRL, STAT, CHANNELCTRL, CH0STAT, CH0OPTS, CH1STAT, CH1OPTS, CH2STAT, CH2OPTS, CH3STAT, CH3OPTS of DCP module. 41 ** - rev. 1.2 (2021-08-10) 42 ** Update header files to align with IMXRT1020RM Rev.2. 43 ** 44 ** ################################################################### 45 */ 46 47 /*! 48 * @file MIMXRT1021 49 * @version 1.2 50 * @date 2021-08-10 51 * @brief Device specific configuration file for MIMXRT1021 (header file) 52 * 53 * Provides a system configuration function and a global variable that contains 54 * the system frequency. It configures the device and initializes the oscillator 55 * (PLL) that is part of the microcontroller device. 56 */ 57 58 #ifndef _SYSTEM_MIMXRT1021_H_ 59 #define _SYSTEM_MIMXRT1021_H_ /**< Symbol preventing repeated inclusion */ 60 61 #ifdef __cplusplus 62 extern "C" { 63 #endif 64 65 #include <stdint.h> 66 67 68 #ifndef DISABLE_WDOG 69 #define DISABLE_WDOG 1 70 #endif 71 72 /* Define clock source values */ 73 74 #define CPU_XTAL_CLK_HZ 24000000UL /* Value of the external crystal or oscillator clock frequency in Hz */ 75 76 #define DEFAULT_SYSTEM_CLOCK 297000000UL /* Default System clock value */ 77 78 79 /** 80 * @brief System clock frequency (core clock) 81 * 82 * The system clock frequency supplied to the SysTick timer and the processor 83 * core clock. This variable can be used by the user application to setup the 84 * SysTick timer or configure other parameters. It may also be used by debugger to 85 * query the frequency of the debug timer or configure the trace clock speed 86 * SystemCoreClock is initialized with a correct predefined value. 87 */ 88 extern uint32_t SystemCoreClock; 89 90 /** 91 * @brief Setup the microcontroller system. 92 * 93 * Typically this function configures the oscillator (PLL) that is part of the 94 * microcontroller device. For systems with variable clock speed it also updates 95 * the variable SystemCoreClock. SystemInit is called from startup_device file. 96 */ 97 void SystemInit (void); 98 99 /** 100 * @brief Updates the SystemCoreClock variable. 101 * 102 * It must be called whenever the core clock is changed during program 103 * execution. SystemCoreClockUpdate() evaluates the clock register settings and calculates 104 * the current core clock. 105 */ 106 void SystemCoreClockUpdate (void); 107 108 /** 109 * @brief SystemInit function hook. 110 * 111 * This weak function allows to call specific initialization code during the 112 * SystemInit() execution.This can be used when an application specific code needs 113 * to be called as close to the reset entry as possible (for example the Multicore 114 * Manager MCMGR_EarlyInit() function call). 115 * NOTE: No global r/w variables can be used in this hook function because the 116 * initialization of these variables happens after this function. 117 */ 118 void SystemInitHook (void); 119 120 #ifdef __cplusplus 121 } 122 #endif 123 124 #endif /* _SYSTEM_MIMXRT1021_H_ */ 125
