1 /* 2 ** ################################################################### 3 ** Processors: LPC844M201JBD48 4 ** LPC844M201JBD64 5 ** LPC844M201JHI33 6 ** LPC844M201JHI48 7 ** 8 ** Compilers: GNU C Compiler 9 ** IAR ANSI C/C++ Compiler for ARM 10 ** Keil ARM C/C++ Compiler 11 ** MCUXpresso Compiler 12 ** 13 ** Reference manual: LPC84x User manual Rev.1.6 8 Dec 2017 14 ** Version: rev. 1.2, 2017-06-08 15 ** Build: b210815 16 ** 17 ** Abstract: 18 ** Provides a system configuration function and a global variable that 19 ** contains the system frequency. It configures the device and initializes 20 ** the oscillator (PLL) that is part of the microcontroller device. 21 ** 22 ** Copyright 2016 Freescale Semiconductor, Inc. 23 ** Copyright 2016-2021 NXP 24 ** All rights reserved. 25 ** 26 ** SPDX-License-Identifier: BSD-3-Clause 27 ** 28 ** http: www.nxp.com 29 ** mail: support@nxp.com 30 ** 31 ** Revisions: 32 ** - rev. 1.0 (2016-08-12) 33 ** Initial version. 34 ** - rev. 1.1 (2016-11-25) 35 ** Update CANFD and Classic CAN register. 36 ** Add MAC TIMERSTAMP registers. 37 ** - rev. 1.2 (2017-06-08) 38 ** Remove RTC_CTRL_RTC_OSC_BYPASS. 39 ** SYSCON_ARMTRCLKDIV rename to SYSCON_ARMTRACECLKDIV. 40 ** Remove RESET and HALT from SYSCON_AHBCLKDIV. 41 ** 42 ** ################################################################### 43 */ 44 45 /*! 46 * @file LPC844 47 * @version 1.2 48 * @date 2017-06-08 49 * @brief Device specific configuration file for LPC844 (header file) 50 * 51 * Provides a system configuration function and a global variable that contains 52 * the system frequency. It configures the device and initializes the oscillator 53 * (PLL) that is part of the microcontroller device. 54 */ 55 56 #ifndef _SYSTEM_LPC844_H_ 57 #define _SYSTEM_LPC844_H_ /**< Symbol preventing repeated inclusion */ 58 59 #ifdef __cplusplus 60 extern "C" { 61 #endif 62 63 #include <stdint.h> 64 65 #define DEFAULT_SYSTEM_CLOCK 12000000u /* Default System clock value */ 66 #define CLK_RTC_32K_CLK 32768u /* RTC oscillator 32 kHz output (32k_clk */ 67 #define CLK_FRO_12MHZ 12000000u /* FRO 12 MHz (fro_12m) */ 68 #define CLK_OSC_IN 12000000u /* Oscillator input */ 69 70 71 /** 72 * @brief System clock frequency (core clock) 73 * 74 * The system clock frequency supplied to the SysTick timer and the processor 75 * core clock. This variable can be used by the user application to setup the 76 * SysTick timer or configure other parameters. It may also be used by debugger to 77 * query the frequency of the debug timer or configure the trace clock speed 78 * SystemCoreClock is initialized with a correct predefined value. 79 */ 80 extern uint32_t SystemCoreClock; 81 82 /** 83 * @brief Setup the microcontroller system. 84 * 85 * Typically this function configures the oscillator (PLL) that is part of the 86 * microcontroller device. For systems with variable clock speed it also updates 87 * the variable SystemCoreClock. SystemInit is called from startup_device file. 88 */ 89 void SystemInit (void); 90 91 /** 92 * @brief Updates the SystemCoreClock variable. 93 * 94 * It must be called whenever the core clock is changed during program 95 * execution. SystemCoreClockUpdate() evaluates the clock register settings and calculates 96 * the current core clock. 97 */ 98 void SystemCoreClockUpdate (void); 99 100 /** 101 * @brief SystemInit function hook. 102 * 103 * This weak function allows to call specific initialization code during the 104 * SystemInit() execution.This can be used when an application specific code needs 105 * to be called as close to the reset entry as possible (for example the Multicore 106 * Manager MCMGR_EarlyInit() function call). 107 * NOTE: No global r/w variables can be used in this hook function because the 108 * initialization of these variables happens after this function. 109 */ 110 void SystemInitHook (void); 111 112 #ifdef __cplusplus 113 } 114 #endif 115 116 #endif /* _SYSTEM_LPC844_H_ */ 117
