1 /* 2 ** ################################################################### 3 ** Processors: LPC5536JBD100 4 ** LPC5536JBD64 5 ** LPC5536JHI48 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: LPC55S3x Reference Manual Rev. DraftG, 07/2021 13 ** Version: rev. 1.1, 2021-08-04 14 ** Build: b210806 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 2016-2021 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. 1.0 (2021-04-12) 32 ** Initial version based on RM DraftF 33 ** - rev. 1.1 (2021-08-04) 34 ** Initial version based on RM DraftG 35 ** 36 ** ################################################################### 37 */ 38 39 /*! 40 * @file LPC5536 41 * @version 1.1 42 * @date 2021-08-04 43 * @brief Device specific configuration file for LPC5536 (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_LPC5536_H_ 51 #define _SYSTEM_LPC5536_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_FRO_48MHZ 48000000u /* FRO 48 MHz (fro_48m) */ 63 #define CLK_FRO_96MHZ 96000000u /* FRO 96 MHz (fro_96m) */ 64 #define CLK_CLK_IN 16000000u /* Default CLK_IN pin clock */ 65 66 67 /** 68 * @brief System clock frequency (core clock) 69 * 70 * The system clock frequency supplied to the SysTick timer and the processor 71 * core clock. This variable can be used by the user application to setup the 72 * SysTick timer or configure other parameters. It may also be used by debugger to 73 * query the frequency of the debug timer or configure the trace clock speed 74 * SystemCoreClock is initialized with a correct predefined value. 75 */ 76 extern uint32_t SystemCoreClock; 77 78 /** 79 * @brief Setup the microcontroller system. 80 * 81 * Typically this function configures the oscillator (PLL) that is part of the 82 * microcontroller device. For systems with variable clock speed it also updates 83 * the variable SystemCoreClock. SystemInit is called from startup_device file. 84 */ 85 void SystemInit (void); 86 87 /** 88 * @brief Updates the SystemCoreClock variable. 89 * 90 * It must be called whenever the core clock is changed during program 91 * execution. SystemCoreClockUpdate() evaluates the clock register settings and calculates 92 * the current core clock. 93 */ 94 void SystemCoreClockUpdate (void); 95 96 /** 97 * @brief SystemInit function hook. 98 * 99 * This weak function allows to call specific initialization code during the 100 * SystemInit() execution.This can be used when an application specific code needs 101 * to be called as close to the reset entry as possible (for example the Multicore 102 * Manager MCMGR_EarlyInit() function call). 103 * NOTE: No global r/w variables can be used in this hook function because the 104 * initialization of these variables happens after this function. 105 */ 106 void SystemInitHook (void); 107 108 #ifdef __cplusplus 109 } 110 #endif 111 112 #endif /* _SYSTEM_LPC5536_H_ */ 113
