1 /* 2 ** ################################################################### 3 ** Processors: LPC812M101JD20 4 ** LPC812M101JDH16 5 ** LPC812M101JDH20 6 ** LPC812M101JTB16 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: LPC81x User manual Rev.1.6 2 April 2014 14 ** Version: rev. 1.2, 2017-06-08 15 ** Build: b200513 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 2016-2020 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 LPC812 47 * @version 1.2 48 * @date 2017-06-08 49 * @brief Device specific configuration file for LPC812 (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_LPC812_H_ 57 #define _SYSTEM_LPC812_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_IRC_12MHZ 12000000u /* FRO 12 MHz (fro_12m) */ 68 #define CLK_OSC_IN 12000000u /* Oscillator input */ 69 #define EXT_CLK_IN 0u /* ext clkin */ 70 71 72 /** 73 * @brief System clock frequency (core clock) 74 * 75 * The system clock frequency supplied to the SysTick timer and the processor 76 * core clock. This variable can be used by the user application to setup the 77 * SysTick timer or configure other parameters. It may also be used by debugger to 78 * query the frequency of the debug timer or configure the trace clock speed 79 * SystemCoreClock is initialized with a correct predefined value. 80 */ 81 extern uint32_t SystemCoreClock; 82 83 /** 84 * @brief Setup the microcontroller system. 85 * 86 * Typically this function configures the oscillator (PLL) that is part of the 87 * microcontroller device. For systems with variable clock speed it also updates 88 * the variable SystemCoreClock. SystemInit is called from startup_device file. 89 */ 90 void SystemInit (void); 91 92 /** 93 * @brief Updates the SystemCoreClock variable. 94 * 95 * It must be called whenever the core clock is changed during program 96 * execution. SystemCoreClockUpdate() evaluates the clock register settings and calculates 97 * the current core clock. 98 */ 99 void SystemCoreClockUpdate (void); 100 101 /** 102 * @brief SystemInit function hook. 103 * 104 * This weak function allows to call specific initialization code during the 105 * SystemInit() execution.This can be used when an application specific code needs 106 * to be called as close to the reset entry as possible (for example the Multicore 107 * Manager MCMGR_EarlyInit() function call). 108 * NOTE: No global r/w variables can be used in this hook function because the 109 * initialization of these variables happens after this function. 110 */ 111 void SystemInitHook (void); 112 113 #ifdef __cplusplus 114 } 115 #endif 116 117 #endif /* _SYSTEM_LPC812_H_ */ 118
