1 /* 2 ** ################################################################### 3 ** Processors: LPC54018JBD208 4 ** LPC54018JET180 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. 1.2, 2017-06-08 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 (2016-08-12) 31 ** Initial version. 32 ** - rev. 1.1 (2016-11-25) 33 ** Update CANFD and Classic CAN register. 34 ** Add MAC TIMERSTAMP registers. 35 ** - rev. 1.2 (2017-06-08) 36 ** Remove RTC_CTRL_RTC_OSC_BYPASS. 37 ** SYSCON_ARMTRCLKDIV rename to SYSCON_ARMTRACECLKDIV. 38 ** Remove RESET and HALT from SYSCON_AHBCLKDIV. 39 ** 40 ** ################################################################### 41 */ 42 43 /*! 44 * @file LPC54018 45 * @version 1.2 46 * @date 2017-06-08 47 * @brief Device specific configuration file for LPC54018 (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_LPC54018_H_ 55 #define _SYSTEM_LPC54018_H_ /**< Symbol preventing repeated inclusion */ 56 57 #ifdef __cplusplus 58 extern "C" { 59 #endif 60 61 #include <stdint.h> 62 63 #define DEFAULT_SYSTEM_CLOCK 12000000u /* Default System clock value */ 64 #define CLK_RTC_32K_CLK 32768u /* RTC oscillator 32 kHz output (32k_clk */ 65 #define CLK_FRO_12MHZ 12000000u /* FRO 12 MHz (fro_12m) */ 66 #define CLK_FRO_48MHZ 48000000u /* FRO 48 MHz (fro_48m) */ 67 #define CLK_FRO_96MHZ 96000000u /* FRO 96 MHz (fro_96m) */ 68 #define CLK_CLK_IN 0u /* Default CLK_IN pin clock */ 69 70 /** 71 * @brief System clock frequency (core clock) 72 * 73 * The system clock frequency supplied to the SysTick timer and the processor 74 * core clock. This variable can be used by the user application to setup the 75 * SysTick timer or configure other parameters. It may also be used by debugger to 76 * query the frequency of the debug timer or configure the trace clock speed 77 * SystemCoreClock is initialized with a correct predefined value. 78 */ 79 extern uint32_t SystemCoreClock; 80 81 /** 82 * @brief Setup the microcontroller system. 83 * 84 * Typically this function configures the oscillator (PLL) that is part of the 85 * microcontroller device. For systems with variable clock speed it also updates 86 * the variable SystemCoreClock. SystemInit is called from startup_device file. 87 */ 88 void SystemInit(void); 89 90 /** 91 * @brief Updates the SystemCoreClock variable. 92 * 93 * It must be called whenever the core clock is changed during program 94 * execution. SystemCoreClockUpdate() evaluates the clock register settings and calculates 95 * the current core clock. 96 */ 97 void SystemCoreClockUpdate(void); 98 99 /** 100 * @brief SystemInit function hook. 101 * 102 * This weak function allows to call specific initialization code during the 103 * SystemInit() execution.This can be used when an application specific code needs 104 * to be called as close to the reset entry as possible (for example the Multicore 105 * Manager MCMGR_EarlyInit() function call). 106 * NOTE: No global r/w variables can be used in this hook function because the 107 * initialization of these variables happens after this function. 108 */ 109 void SystemInitHook(void); 110 111 #ifdef __cplusplus 112 } 113 #endif 114 115 #endif /* _SYSTEM_LPC54018_H_ */ 116
