78 lines
2.5 KiB
C
78 lines
2.5 KiB
C
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/**********************************************************************
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* $Id$ system_lpc43xx.c 2011-06-02
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*//**
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* @file system_lpc43xx.c
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* @brief Cortex-M3 Device System Source File for NXP lpc43xx Series.
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* @version 1.0
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* @date 02. June. 2011
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* @author NXP MCU SW Application Team
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*
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* Copyright(C) 2011, NXP Semiconductor
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* All rights reserved.
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*
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***********************************************************************
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* Software that is described herein is for illustrative purposes only
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* which provides customers with programming information regarding the
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* products. This software is supplied "AS IS" without any warranties.
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* NXP Semiconductors assumes no responsibility or liability for the
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* use of the software, conveys no license or title under any patent,
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* copyright, or mask work right to the product. NXP Semiconductors
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* reserves the right to make changes in the software without
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* notification. NXP Semiconductors also make no representation or
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* warranty that such application will be suitable for the specified
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* use without further testing or modification.
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**********************************************************************/
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#include "LPC43xx.h"
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/*----------------------------------------------------------------------------
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Define clocks
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*----------------------------------------------------------------------------*/
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#define __IRC (12000000UL) /* IRC Oscillator frequency */
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/*----------------------------------------------------------------------------
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Clock Variable definitions
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*----------------------------------------------------------------------------*/
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uint32_t SystemCoreClock = __IRC; /*!< System Clock Frequency (Core Clock)*/
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#ifndef __CODE_RED
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extern uint32_t getPC(void);
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#endif
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/**
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* Initialize the system
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*
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* @param none
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* @return none
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*
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* @brief Setup the microcontroller system.
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* Initialize the System.
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*/
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void SystemInit (void)
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{
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SystemCoreClock = __IRC;
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#ifdef __CODE_RED
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// CodeRed startup code will modify VTOR register to match
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// when code has been linked to run from.
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// Check whether we are running from external flash
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if (SCB->VTOR == 0x1C000000)
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/*Enable Buffer for External Flash*/
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LPC_EMC->STATICCONFIG0 |= 1<<19;
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// Call clock initialisation code
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CGU_Init();
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#else
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#if defined(CORE_M4) || defined(CORE_M3)
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// Enable VTOR register to point to vector table
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SCB->VTOR = getPC() & 0xFFF00000;
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#endif
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/*Enable Buffer for External Flash*/
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LPC_EMC->STATICCONFIG0 |= 1<<19;
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#endif
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}
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