1 /* 2 ** ################################################################### 3 ** Processors: LPC54S018JBD208 4 ** LPC54S018JET180 5 ** 6 ** Compilers: GNU C Compiler 7 ** IAR ANSI C/C++ Compiler for ARM 8 ** Keil ARM C/C++ Compiler 9 ** MCUXpresso Compiler 10 ** 11 ** Reference manual: LPC540xx/LPC54S0xx User manual Rev.0.8 5 June 2018 12 ** Version: rev. 1.0, 2018-04-20 13 ** Build: b201015 14 ** 15 ** Abstract: 16 ** Provides a system configuration function and a global variable that 17 ** contains the system frequency. It configures the device and initializes 18 ** the oscillator (PLL) that is part of the microcontroller device. 19 ** 20 ** Copyright 2016 Freescale Semiconductor, Inc. 21 ** Copyright 2016-2020 NXP 22 ** All rights reserved. 23 ** 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 (2018-04-20) 31 ** Initial version. 32 ** 33 ** ################################################################### 34 */ 35 36 /*! 37 * @file LPC54S018 38 * @version 1.0 39 * @date 2018-04-20 40 * @brief Device specific configuration file for LPC54S018 (header file) 41 * 42 * Provides a system configuration function and a global variable that contains 43 * the system frequency. It configures the device and initializes the oscillator 44 * (PLL) that is part of the microcontroller device. 45 */ 46 47 #ifndef _SYSTEM_LPC54S018_H_ 48 #define _SYSTEM_LPC54S018_H_ /**< Symbol preventing repeated inclusion */ 49 50 #ifdef __cplusplus 51 extern "C" { 52 #endif 53 54 #include <stdint.h> 55 56 #define DEFAULT_SYSTEM_CLOCK 12000000u /* Default System clock value */ 57 #define CLK_RTC_32K_CLK 32768u /* RTC oscillator 32 kHz output (32k_clk */ 58 #define CLK_FRO_12MHZ 12000000u /* FRO 12 MHz (fro_12m) */ 59 #define CLK_FRO_48MHZ 48000000u /* FRO 48 MHz (fro_48m) */ 60 #define CLK_FRO_96MHZ 96000000u /* FRO 96 MHz (fro_96m) */ 61 #define CLK_CLK_IN 0u /* Default CLK_IN pin clock */ 62 63 /** 64 * @brief System clock frequency (core clock) 65 * 66 * The system clock frequency supplied to the SysTick timer and the processor 67 * core clock. This variable can be used by the user application to setup the 68 * SysTick timer or configure other parameters. It may also be used by debugger to 69 * query the frequency of the debug timer or configure the trace clock speed 70 * SystemCoreClock is initialized with a correct predefined value. 71 */ 72 extern uint32_t SystemCoreClock; 73 74 /** 75 * @brief Setup the microcontroller system. 76 * 77 * Typically this function configures the oscillator (PLL) that is part of the 78 * microcontroller device. For systems with variable clock speed it also updates 79 * the variable SystemCoreClock. SystemInit is called from startup_device file. 80 */ 81 void SystemInit(void); 82 83 /** 84 * @brief Updates the SystemCoreClock variable. 85 * 86 * It must be called whenever the core clock is changed during program 87 * execution. SystemCoreClockUpdate() evaluates the clock register settings and calculates 88 * the current core clock. 89 */ 90 void SystemCoreClockUpdate(void); 91 92 /** 93 * @brief SystemInit function hook. 94 * 95 * This weak function allows to call specific initialization code during the 96 * SystemInit() execution.This can be used when an application specific code needs 97 * to be called as close to the reset entry as possible (for example the Multicore 98 * Manager MCMGR_EarlyInit() function call). 99 * NOTE: No global r/w variables can be used in this hook function because the 100 * initialization of these variables happens after this function. 101 */ 102 void SystemInitHook(void); 103 104 #ifdef __cplusplus 105 } 106 #endif 107 108 #endif /* _SYSTEM_LPC54S018_H_ */ 109
