117 lines
4.0 KiB
C
117 lines
4.0 KiB
C
/*
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** ###################################################################
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** Processors: LPC845M301JBD48
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** LPC845M301JBD64
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** LPC845M301JHI33
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** LPC845M301JHI48
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**
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** Compilers: GNU C Compiler
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** IAR ANSI C/C++ Compiler for ARM
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** Keil ARM C/C++ Compiler
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** MCUXpresso Compiler
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**
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** Reference manual: LPC84x User manual Rev.1.6 8 Dec 2017
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** Version: rev. 1.2, 2017-06-08
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** Build: b210815
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**
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** Abstract:
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** Provides a system configuration function and a global variable that
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** contains the system frequency. It configures the device and initializes
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** the oscillator (PLL) that is part of the microcontroller device.
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**
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** Copyright 2016 Freescale Semiconductor, Inc.
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** Copyright 2016-2021 NXP
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** All rights reserved.
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**
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** SPDX-License-Identifier: BSD-3-Clause
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**
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** http: www.nxp.com
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** mail: support@nxp.com
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**
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** Revisions:
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** - rev. 1.0 (2016-08-12)
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** Initial version.
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** - rev. 1.1 (2016-11-25)
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** Update CANFD and Classic CAN register.
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** Add MAC TIMERSTAMP registers.
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** - rev. 1.2 (2017-06-08)
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** Remove RTC_CTRL_RTC_OSC_BYPASS.
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** SYSCON_ARMTRCLKDIV rename to SYSCON_ARMTRACECLKDIV.
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** Remove RESET and HALT from SYSCON_AHBCLKDIV.
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**
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** ###################################################################
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*/
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/*!
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* @file LPC845
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* @version 1.2
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* @date 2017-06-08
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* @brief Device specific configuration file for LPC845 (header file)
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*
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* Provides a system configuration function and a global variable that contains
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* the system frequency. It configures the device and initializes the oscillator
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* (PLL) that is part of the microcontroller device.
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*/
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#ifndef _SYSTEM_LPC845_H_
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#define _SYSTEM_LPC845_H_ /**< Symbol preventing repeated inclusion */
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include <stdint.h>
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#define DEFAULT_SYSTEM_CLOCK 12000000u /* Default System clock value */
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#define CLK_RTC_32K_CLK 32768u /* RTC oscillator 32 kHz output (32k_clk */
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#define CLK_FRO_12MHZ 12000000u /* FRO 12 MHz (fro_12m) */
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#define CLK_OSC_IN 12000000u /* Oscillator input */
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/**
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* @brief System clock frequency (core clock)
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*
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* The system clock frequency supplied to the SysTick timer and the processor
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* core clock. This variable can be used by the user application to setup the
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* SysTick timer or configure other parameters. It may also be used by debugger to
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* query the frequency of the debug timer or configure the trace clock speed
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* SystemCoreClock is initialized with a correct predefined value.
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*/
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extern uint32_t SystemCoreClock;
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/**
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* @brief Setup the microcontroller system.
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*
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* Typically this function configures the oscillator (PLL) that is part of the
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* microcontroller device. For systems with variable clock speed it also updates
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* the variable SystemCoreClock. SystemInit is called from startup_device file.
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*/
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void SystemInit (void);
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/**
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* @brief Updates the SystemCoreClock variable.
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*
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* It must be called whenever the core clock is changed during program
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* execution. SystemCoreClockUpdate() evaluates the clock register settings and calculates
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* the current core clock.
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*/
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void SystemCoreClockUpdate (void);
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/**
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* @brief SystemInit function hook.
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*
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* This weak function allows to call specific initialization code during the
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* SystemInit() execution.This can be used when an application specific code needs
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* to be called as close to the reset entry as possible (for example the Multicore
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* Manager MCMGR_EarlyInit() function call).
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* NOTE: No global r/w variables can be used in this hook function because the
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* initialization of these variables happens after this function.
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*/
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void SystemInitHook (void);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYSTEM_LPC845_H_ */
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