69 lines
2.4 KiB
C
69 lines
2.4 KiB
C
/****************************************************************************
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* arch/arm/src/lpc54xx/lpc54_clrpend.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <arch/irq.h>
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#include "nvic.h"
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#include "arm_arch.h"
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#include "lpc54_irq.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: lpc54_clrpend
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*
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* Description:
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* Clear a pending interrupt at the NVIC. This does not seem to be
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* required for most interrupts. Don't know why... but the LPC54xx
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* Ethernet EMAC interrupt definitely needs it!
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*
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* This function is logically a part of lpc54_irq.c, but I will keep it in
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* a separate file so that it will not increase the footprint on LPC54xx
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* platforms that do not need this function.
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*
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****************************************************************************/
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void lpc54_clrpend(int irq)
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{
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/* Check for external interrupt */
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if (irq >= LPC54_IRQ_EXTINT)
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{
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if (irq < (LPC54_IRQ_EXTINT + 32))
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{
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putreg32(1 << (irq - LPC54_IRQ_EXTINT), NVIC_IRQ0_31_CLRPEND);
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}
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else if (irq < LPC54_IRQ_NIRQS)
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{
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putreg32(1 << (irq - LPC54_IRQ_EXTINT - 32),
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NVIC_IRQ32_63_CLRPEND);
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}
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}
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}
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