1 /* 2 ** ################################################################### 3 ** Processors: LPC802M001JDH16 4 ** LPC802M001JDH20 5 ** LPC802M001JHI33 6 ** LPC802M011JDH20 7 ** LPC802UK 8 ** 9 ** Compilers: GNU C Compiler 10 ** IAR ANSI C/C++ Compiler for ARM 11 ** Keil ARM C/C++ Compiler 12 ** MCUXpresso Compiler 13 ** 14 ** Reference manual: LPC802 User manual Rev.1.0 1 Dec 2017 15 ** Version: rev. 1.0, 2018-01-09 16 ** Build: b200513 17 ** 18 ** Abstract: 19 ** Provides a system configuration function and a global variable that 20 ** contains the system frequency. It configures the device and initializes 21 ** the oscillator (PLL) that is part of the microcontroller device. 22 ** 23 ** Copyright 2016 Freescale Semiconductor, Inc. 24 ** Copyright 2016-2020 NXP 25 ** All rights reserved. 26 ** 27 ** SPDX-License-Identifier: BSD-3-Clause 28 ** 29 ** http: www.nxp.com 30 ** mail: support@nxp.com 31 ** 32 ** Revisions: 33 ** - rev. 1.0 (2018-01-09) 34 ** Initial version. 35 ** 36 ** ################################################################### 37 */ 38 39 /*! 40 * @file LPC802 41 * @version 1.0 42 * @date 2018-01-09 43 * @brief Device specific configuration file for LPC802 (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_LPC802_H_ 51 #define _SYSTEM_LPC802_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 #define CLK_OSC_LP 1000000u /* Low power oscillator */ 64 65 volatile extern uint32_t g_Fro_Osc_Freq; 66 67 68 /** 69 * @brief System clock frequency (core clock) 70 * 71 * The system clock frequency supplied to the SysTick timer and the processor 72 * core clock. This variable can be used by the user application to setup the 73 * SysTick timer or configure other parameters. It may also be used by debugger to 74 * query the frequency of the debug timer or configure the trace clock speed 75 * SystemCoreClock is initialized with a correct predefined value. 76 */ 77 extern uint32_t SystemCoreClock; 78 79 /** 80 * @brief Setup the microcontroller system. 81 * 82 * Typically this function configures the oscillator (PLL) that is part of the 83 * microcontroller device. For systems with variable clock speed it also updates 84 * the variable SystemCoreClock. SystemInit is called from startup_device file. 85 */ 86 void SystemInit (void); 87 88 /** 89 * @brief Updates the SystemCoreClock variable. 90 * 91 * It must be called whenever the core clock is changed during program 92 * execution. SystemCoreClockUpdate() evaluates the clock register settings and calculates 93 * the current core clock. 94 */ 95 void SystemCoreClockUpdate (void); 96 97 /** 98 * @brief SystemInit function hook. 99 * 100 * This weak function allows to call specific initialization code during the 101 * SystemInit() execution.This can be used when an application specific code needs 102 * to be called as close to the reset entry as possible (for example the Multicore 103 * Manager MCMGR_EarlyInit() function call). 104 * NOTE: No global r/w variables can be used in this hook function because the 105 * initialization of these variables happens after this function. 106 */ 107 void SystemInitHook (void); 108 109 #ifdef __cplusplus 110 } 111 #endif 112 113 #endif /* _SYSTEM_LPC802_H_ */ 114
