106 lines
2.6 KiB
C
106 lines
2.6 KiB
C
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/*
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* File : trap.c
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* This file is part of RT-Thread RTOS
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* COPYRIGHT (C) 2006, RT-Thread Development Team
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://openlab.rt-thread.com/license/LICENSE
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*
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* Change Logs:
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* Date Author Notes
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* 2006-08-23 Bernard first version
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*/
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#include <rtthread.h>
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#include "lpc214x.h"
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#define MAX_HANDLERS 32
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extern rt_uint32_t rt_interrupt_nest;
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rt_uint32_t rt_interrupt_from_thread, rt_interrupt_to_thread;
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rt_uint32_t rt_thread_switch_interrput_flag;
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/**
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* @addtogroup LPC214x
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*/
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/*@{*/
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void rt_hw_interrupt_handler(int vector)
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{
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rt_kprintf("Unhandled interrupt %d occured!!!\n", vector);
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}
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/**
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* This function will initialize hardware interrupt
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*/
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void rt_hw_interrupt_init()
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{
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rt_base_t index;
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rt_uint32_t *vect_addr, *vect_ctl;
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/* initialize VIC*/
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VICIntEnClr = 0xffffffff;
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VICVectAddr = 0;
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/* set all to IRQ */
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VICIntSelect = 0;
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for (index = 0; index < MAX_HANDLERS; index ++)
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{
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vect_addr = (rt_uint32_t *)(VIC_BASE_ADDR + 0x100 + (index << 2));
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vect_ctl = (rt_uint32_t *)(VIC_BASE_ADDR + 0x200 + (index << 2));
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*vect_addr = (rt_uint32_t)rt_hw_interrupt_handler;
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*vect_ctl = 0xF;
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}
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/* init interrupt nest, and context in thread sp */
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rt_interrupt_nest = 0;
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rt_interrupt_from_thread = 0;
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rt_interrupt_to_thread = 0;
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rt_thread_switch_interrput_flag = 0;
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}
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/**
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* This function will mask a interrupt.
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* @param vector the interrupt number
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*/
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void rt_hw_interrupt_mask(int vector)
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{
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VICIntEnClr = (1 << vector);
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}
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/**
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* This function will un-mask a interrupt.
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* @param vector the interrupt number
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*/
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void rt_hw_interrupt_umask(int vector)
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{
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VICIntEnable = (1 << vector);
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}
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/**
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* This function will install a interrupt service routine to a interrupt.
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* @param vector the interrupt number
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* @param new_handler the interrupt service routine to be installed
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* @param old_handler the old interrupt service routine
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*/
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void rt_hw_interrupt_install(int vector, rt_isr_handler_t new_handler, rt_isr_handler_t *old_handler)
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{
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if(vector >= 0 && vector < MAX_HANDLERS)
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{
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/* get VIC address */
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rt_uint32_t* vect_addr = (rt_uint32_t *)(VIC_BASE_ADDR + 0x100 + (vector << 2));
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rt_uint32_t* vect_ctl = (rt_uint32_t *)(VIC_BASE_ADDR + 0x200 + (vector << 2));
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/* assign IRQ slot and enable this slot */
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*vect_ctl = 0x20 | (vector & 0x1F);
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if (old_handler != RT_NULL) *old_handler = (rt_isr_handler_t) *vect_addr;
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if (new_handler != RT_NULL) *vect_addr = (rt_uint32_t) new_handler;
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}
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}
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/*@}*/
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