1 /* 2 ** ################################################################### 3 ** Processors: LPC864M201JBD64 4 ** LPC864M201JHI33 5 ** LPC864M201JHI48 6 ** 7 ** Compilers: GNU C Compiler 8 ** IAR ANSI C/C++ Compiler for ARM 9 ** Keil ARM C/C++ Compiler 10 ** MCUXpresso Compiler 11 ** 12 ** Reference manual: LPC86x User manual Rev.1 March 2022 13 ** Version: rev. 1.0, 2022-03-15 14 ** Build: b230713 15 ** 16 ** Abstract: 17 ** Provides a system configuration function and a global variable that 18 ** contains the system frequency. It configures the device and initializes 19 ** the oscillator (PLL) that is part of the microcontroller device. 20 ** 21 ** Copyright 2016 Freescale Semiconductor, Inc. 22 ** Copyright 2016-2023 NXP 23 ** SPDX-License-Identifier: BSD-3-Clause 24 ** 25 ** http: www.nxp.com 26 ** mail: support@nxp.com 27 ** 28 ** Revisions: 29 ** - rev. 0.0 (2021-07-15) 30 ** Initial version. 31 ** - rev. 1.0 (2022-03-15) 32 ** Revesion of Rev. 1. 33 ** 34 ** ################################################################### 35 */ 36 37 /*! 38 * @file LPC864 39 * @version 1.0 40 * @date 2022-03-15 41 * @brief Device specific configuration file for LPC864 (header file) 42 * 43 * Provides a system configuration function and a global variable that contains 44 * the system frequency. It configures the device and initializes the oscillator 45 * (PLL) that is part of the microcontroller device. 46 */ 47 48 #ifndef _SYSTEM_LPC864_H_ 49 #define _SYSTEM_LPC864_H_ /**< Symbol preventing repeated inclusion */ 50 51 #ifdef __cplusplus 52 extern "C" { 53 #endif 54 55 #include <stdint.h> 56 57 #define DEFAULT_SYSTEM_CLOCK 12000000u /* Default System clock value */ 58 #define CLK_RTC_32K_CLK 32768u /* RTC oscillator 32 kHz output (32k_clk */ 59 #define CLK_FRO_12MHZ 12000000u /* FRO 12 MHz (fro_12m) */ 60 #define CLK_OSC_IN 12000000u /* Oscillator input */ 61 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_LPC864_H_ */ 109
