Matthias
373a8c32b2
git-svn-id: file:///srv/dev-disk-by-uuid-17e88007-4d0c-45e0-8757-cacfcc458630/repositories/svn/Diplomarbeit@55 9fe90eed-be63-e94b-8204-d34ff4c2ff93
79 lines
2.5 KiB
C
79 lines
2.5 KiB
C
/*****************************************************************************
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* irq.c: Interrupt handler C file for NXP LPC230x Family Microprocessors
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*
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* Copyright(C) 2006, NXP Semiconductor
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* All rights reserved.
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*
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* History
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* 2006.07.13 ver 1.00 Prelimnary version, first Release
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*
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******************************************************************************/
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#include "LPC23xx.h"
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#include "types.h"
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#include "irq.h"
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/* Initialize the interrupt controller */
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/******************************************************************************
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** Function name: init_VIC
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**
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** Descriptions: Initialize VIC interrupt controller.
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** parameters: None
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** Returned value: None
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**
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******************************************************************************/
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void init_VIC(void)
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{
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UINT32 i = 0;
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UINT32 *vect_addr, *vect_cntl;
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/* initialize VIC*/
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VICIntEnClr = 0xffffffff;
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VICVectAddr = 0;
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VICIntSelect = 0;
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/* set all the vector and vector control register to 0 */
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for ( i = 0; i < VIC_SIZE; i++ )
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{
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vect_addr = (UINT32 *)(VIC_BASE_ADDR + VECT_ADDR_INDEX + i*4);
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vect_cntl = (UINT32 *)(VIC_BASE_ADDR + VECT_CNTL_INDEX + i*4);
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*vect_addr = 0x0;
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*vect_cntl = 0xF;
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}
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return;
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}
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/******************************************************************************
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** Function name: install_irq
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**
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** Descriptions: Install interrupt handler
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** parameters: Interrupt number, interrupt handler address,
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** interrupt priority
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** Returned value: true or false, return false if IntNum is out of range
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**
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******************************************************************************/
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BOOLEAN install_irq( UINT32 IntNumber, void *HandlerAddr, UINT32 Priority )
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{
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UINT32 *vect_addr;
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UINT32 *vect_cntl;
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VICIntEnClr = 1 << IntNumber; /* Disable Interrupt */
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if ( IntNumber >= VIC_SIZE )
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{
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return ( FALSE );
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}
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else
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{
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/* find first un-assigned VIC address for the handler */
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vect_addr = (UINT32 *)(VIC_BASE_ADDR + VECT_ADDR_INDEX + IntNumber*4);
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vect_cntl = (UINT32 *)(VIC_BASE_ADDR + VECT_CNTL_INDEX + IntNumber*4);
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*vect_addr = (UINT32)HandlerAddr; /* set interrupt vector */
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*vect_cntl = Priority;
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VICIntEnable = 1 << IntNumber; /* Enable Interrupt */
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return( TRUE );
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}
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}
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/******************************************************************************
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** End Of File
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******************************************************************************/
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