1 /* 2 ** ################################################################### 3 ** Processors: LPC865M201JBD64 4 ** LPC865M201JHI33 5 ** LPC865M201JHI48 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: b230301 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 ** All rights reserved. 24 ** 25 ** SPDX-License-Identifier: BSD-3-Clause 26 ** 27 ** http: www.nxp.com 28 ** mail: support@nxp.com 29 ** 30 ** Revisions: 31 ** - rev. 0.0 (2021-07-15) 32 ** Initial version. 33 ** - rev. 1.0 (2022-03-15) 34 ** Revesion of Rev. 1. 35 ** 36 ** ################################################################### 37 */ 38 39 /*! 40 * @file LPC865 41 * @version 1.0 42 * @date 2022-03-15 43 * @brief Device specific configuration file for LPC865 (header file) 44 * 45 * Provides a system configuration function and a global variable that contains 46 * the system frequency. It configures the device and initializes the oscillator 47 * (PLL) that is part of the microcontroller device. 48 */ 49 50 #ifndef _SYSTEM_LPC865_H_ 51 #define _SYSTEM_LPC865_H_ /**< Symbol preventing repeated inclusion */ 52 53 #ifdef __cplusplus 54 extern "C" { 55 #endif 56 57 #include <stdint.h> 58 59 #define DEFAULT_SYSTEM_CLOCK 12000000u /* Default System clock value */ 60 #define CLK_RTC_32K_CLK 32768u /* RTC oscillator 32 kHz output (32k_clk */ 61 #define CLK_FRO_12MHZ 12000000u /* FRO 12 MHz (fro_12m) */ 62 #define CLK_OSC_IN 12000000u /* Oscillator input */ 63 64 65 /** 66 * @brief System clock frequency (core clock) 67 * 68 * The system clock frequency supplied to the SysTick timer and the processor 69 * core clock. This variable can be used by the user application to setup the 70 * SysTick timer or configure other parameters. It may also be used by debugger to 71 * query the frequency of the debug timer or configure the trace clock speed 72 * SystemCoreClock is initialized with a correct predefined value. 73 */ 74 extern uint32_t SystemCoreClock; 75 76 /** 77 * @brief Setup the microcontroller system. 78 * 79 * Typically this function configures the oscillator (PLL) that is part of the 80 * microcontroller device. For systems with variable clock speed it also updates 81 * the variable SystemCoreClock. SystemInit is called from startup_device file. 82 */ 83 void SystemInit (void); 84 85 /** 86 * @brief Updates the SystemCoreClock variable. 87 * 88 * It must be called whenever the core clock is changed during program 89 * execution. SystemCoreClockUpdate() evaluates the clock register settings and calculates 90 * the current core clock. 91 */ 92 void SystemCoreClockUpdate (void); 93 94 /** 95 * @brief SystemInit function hook. 96 * 97 * This weak function allows to call specific initialization code during the 98 * SystemInit() execution.This can be used when an application specific code needs 99 * to be called as close to the reset entry as possible (for example the Multicore 100 * Manager MCMGR_EarlyInit() function call). 101 * NOTE: No global r/w variables can be used in this hook function because the 102 * initialization of these variables happens after this function. 103 */ 104 void SystemInitHook (void); 105 106 #ifdef __cplusplus 107 } 108 #endif 109 110 #endif /* _SYSTEM_LPC865_H_ */ 111
