/* * Copyright (c) 2006-2021, RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2008-12-11 XuXinming first version * 2013-03-29 aozima Modify the interrupt interface implementations. */ #include <rtthread.h> #include <rthw.h> #include "LPC24xx.h" #define MAX_HANDLERS 32 /* exception and interrupt handler table */ struct rt_irq_desc irq_desc[MAX_HANDLERS]; extern rt_uint32_t rt_interrupt_nest; /* exception and interrupt handler table */ rt_uint32_t rt_interrupt_from_thread, rt_interrupt_to_thread; rt_uint32_t rt_thread_switch_interrupt_flag; /** * @addtogroup LPC2478 */ /*@{*/ void rt_hw_interrupt_handler(int vector, void *param) { rt_kprintf("Unhandled interrupt %d occured!!!\n", vector); } void rt_hw_interrupt_init(void) { register int i; rt_uint32_t *vect_addr, *vect_cntl; /* initialize VIC*/ VICIntEnClr = 0xffffffff; VICVectAddr = 0; VICIntSelect = 0; /* init exceptions table */ rt_memset(irq_desc, 0x00, sizeof(irq_desc)); for(i=0; i < MAX_HANDLERS; i++) { irq_desc[i].handler = rt_hw_interrupt_handler; vect_addr = (rt_uint32_t *)(VIC_BASE_ADDR + 0x100 + i*4); vect_cntl = (rt_uint32_t *)(VIC_BASE_ADDR + 0x200 + i*4); *vect_addr = (rt_uint32_t)&irq_desc[i]; *vect_cntl = 0xF; } /* init interrupt nest, and context in thread sp */ rt_interrupt_nest = 0; rt_interrupt_from_thread = 0; rt_interrupt_to_thread = 0; rt_thread_switch_interrupt_flag = 0; } void rt_hw_interrupt_mask(int vector) { VICIntEnClr = (1 << vector); } void rt_hw_interrupt_umask(int vector) { VICIntEnable = (1 << vector); } /** * This function will install a interrupt service routine to a interrupt. * @param vector the interrupt number * @param handler the interrupt service routine to be installed * @param param the parameter for interrupt service routine * @name unused. * * @return the old handler */ rt_isr_handler_t rt_hw_interrupt_install(int vector, rt_isr_handler_t handler, void *param, const char *name) { rt_isr_handler_t old_handler = RT_NULL; if(vector >= 0 && vector < MAX_HANDLERS) { old_handler = irq_desc[vector].handler; if (handler != RT_NULL) { irq_desc[vector].handler = handler; irq_desc[vector].param = param; } } return old_handler; } /*@}*/