1 /* 2 ** ################################################################### 3 ** Processor: LPC810M021FN8 4 ** Compilers: GNU C Compiler 5 ** IAR ANSI C/C++ Compiler for ARM 6 ** Keil ARM C/C++ Compiler 7 ** MCUXpresso Compiler 8 ** 9 ** Reference manual: LPC81x User manual Rev.1.6 2 April 2014 10 ** Version: rev. 1.2, 2017-06-08 11 ** Build: b200513 12 ** 13 ** Abstract: 14 ** Provides a system configuration function and a global variable that 15 ** contains the system frequency. It configures the device and initializes 16 ** the oscillator (PLL) that is part of the microcontroller device. 17 ** 18 ** Copyright 2016 Freescale Semiconductor, Inc. 19 ** Copyright 2016-2020 NXP 20 ** All rights reserved. 21 ** 22 ** SPDX-License-Identifier: BSD-3-Clause 23 ** 24 ** http: www.nxp.com 25 ** mail: support@nxp.com 26 ** 27 ** Revisions: 28 ** - rev. 1.0 (2016-08-12) 29 ** Initial version. 30 ** - rev. 1.1 (2016-11-25) 31 ** Update CANFD and Classic CAN register. 32 ** Add MAC TIMERSTAMP registers. 33 ** - rev. 1.2 (2017-06-08) 34 ** Remove RTC_CTRL_RTC_OSC_BYPASS. 35 ** SYSCON_ARMTRCLKDIV rename to SYSCON_ARMTRACECLKDIV. 36 ** Remove RESET and HALT from SYSCON_AHBCLKDIV. 37 ** 38 ** ################################################################### 39 */ 40 41 /*! 42 * @file LPC810 43 * @version 1.2 44 * @date 2017-06-08 45 * @brief Device specific configuration file for LPC810 (header file) 46 * 47 * Provides a system configuration function and a global variable that contains 48 * the system frequency. It configures the device and initializes the oscillator 49 * (PLL) that is part of the microcontroller device. 50 */ 51 52 #ifndef _SYSTEM_LPC810_H_ 53 #define _SYSTEM_LPC810_H_ /**< Symbol preventing repeated inclusion */ 54 55 #ifdef __cplusplus 56 extern "C" { 57 #endif 58 59 #include <stdint.h> 60 61 #define DEFAULT_SYSTEM_CLOCK 12000000u /* Default System clock value */ 62 #define CLK_RTC_32K_CLK 32768u /* RTC oscillator 32 kHz output (32k_clk */ 63 #define CLK_IRC_12MHZ 12000000u /* FRO 12 MHz (fro_12m) */ 64 #define CLK_OSC_IN 12000000u /* Oscillator input */ 65 #define EXT_CLK_IN 0u /* ext clkin */ 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_LPC810_H_ */ 114
