1 /* 2 ** ################################################################### 3 ** Processors: LPC55S28JBD100 4 ** LPC55S28JBD64 5 ** LPC55S28JEV59 6 ** LPC55S28JEV98 7 ** 8 ** Compilers: GNU C Compiler 9 ** IAR ANSI C/C++ Compiler for ARM 10 ** Keil ARM C/C++ Compiler 11 ** MCUXpresso Compiler 12 ** 13 ** Reference manual: LPC55S6x/LPC55S2x/LPC552x User manual(UM11126) Rev.1.3 16 May 2019 14 ** Version: rev. 1.1, 2019-05-16 15 ** Build: b231019 16 ** 17 ** Abstract: 18 ** Provides a system configuration function and a global variable that 19 ** contains the system frequency. It configures the device and initializes 20 ** the oscillator (PLL) that is part of the microcontroller device. 21 ** 22 ** Copyright 2016 Freescale Semiconductor, Inc. 23 ** Copyright 2016-2023 NXP 24 ** SPDX-License-Identifier: BSD-3-Clause 25 ** 26 ** http: www.nxp.com 27 ** mail: support@nxp.com 28 ** 29 ** Revisions: 30 ** - rev. 1.0 (2018-08-22) 31 ** Initial version based on v0.2UM 32 ** - rev. 1.1 (2019-05-16) 33 ** Initial A1 version based on v1.3UM 34 ** 35 ** ################################################################### 36 */ 37 38 /*! 39 * @file LPC55S28 40 * @version 1.1 41 * @date 2019-05-16 42 * @brief Device specific configuration file for LPC55S28 (header file) 43 * 44 * Provides a system configuration function and a global variable that contains 45 * the system frequency. It configures the device and initializes the oscillator 46 * (PLL) that is part of the microcontroller device. 47 */ 48 49 #ifndef _SYSTEM_LPC55S28_H_ 50 #define _SYSTEM_LPC55S28_H_ /**< Symbol preventing repeated inclusion */ 51 52 #ifdef __cplusplus 53 extern "C" { 54 #endif 55 56 #include <stdint.h> 57 58 #define DEFAULT_SYSTEM_CLOCK 12000000u /* Default System clock value */ 59 #define CLK_RTC_32K_CLK 32768u /* RTC oscillator 32 kHz output (32k_clk */ 60 #define CLK_FRO_12MHZ 12000000u /* FRO 12 MHz (fro_12m) */ 61 #define CLK_FRO_48MHZ 48000000u /* FRO 48 MHz (fro_48m) */ 62 #define CLK_FRO_96MHZ 96000000u /* FRO 96 MHz (fro_96m) */ 63 #define CLK_CLK_IN 16000000u /* Default CLK_IN pin clock */ 64 65 66 /** 67 * @brief System clock frequency (core clock) 68 * 69 * The system clock frequency supplied to the SysTick timer and the processor 70 * core clock. This variable can be used by the user application to setup the 71 * SysTick timer or configure other parameters. It may also be used by debugger to 72 * query the frequency of the debug timer or configure the trace clock speed 73 * SystemCoreClock is initialized with a correct predefined value. 74 */ 75 extern uint32_t SystemCoreClock; 76 77 /** 78 * @brief Setup the microcontroller system. 79 * 80 * Typically this function configures the oscillator (PLL) that is part of the 81 * microcontroller device. For systems with variable clock speed it also updates 82 * the variable SystemCoreClock. SystemInit is called from startup_device file. 83 */ 84 void SystemInit (void); 85 86 /** 87 * @brief Updates the SystemCoreClock variable. 88 * 89 * It must be called whenever the core clock is changed during program 90 * execution. SystemCoreClockUpdate() evaluates the clock register settings and calculates 91 * the current core clock. 92 */ 93 void SystemCoreClockUpdate (void); 94 95 /** 96 * @brief SystemInit function hook. 97 * 98 * This weak function allows to call specific initialization code during the 99 * SystemInit() execution.This can be used when an application specific code needs 100 * to be called as close to the reset entry as possible (for example the Multicore 101 * Manager MCMGR_EarlyInit() function call). 102 * NOTE: No global r/w variables can be used in this hook function because the 103 * initialization of these variables happens after this function. 104 */ 105 void SystemInitHook (void); 106 107 #ifdef __cplusplus 108 } 109 #endif 110 111 #endif /* _SYSTEM_LPC55S28_H_ */ 112
