98 lines
3.9 KiB
C
98 lines
3.9 KiB
C
/****************************************************************************
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* arch/arm/src/lpc17/lpc17_clrpend.c
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* arch/arm/src/chip/lpc17_clrpend.c
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*
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* Copyright (C) 2010 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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 "up_arch.h"
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#include "lpc17_clrpend.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: lpc17_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 required
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* for most interrupts. Don't know why... but the LPC1766 Ethernet EMAC
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* interrupt definitely needs it!
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*
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* I keep it in a separate file so that it will not increase the footprint
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* on LPC17xx platforms that do not need this function.
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*
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****************************************************************************/
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void lpc17_clrpend(int irq)
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{
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/* Check for external interrupt */
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if (irq >= LPC17_IRQ_EXTINT)
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{
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if (irq < (LPC17_IRQ_EXTINT+32))
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{
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putreg32(1 << (irq - LPC17_IRQ_EXTINT), NVIC_IRQ0_31_CLRPEND);
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}
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else if (irq < LPC17_IRQ_NIRQS)
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{
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putreg32(1 << (irq - LPC17_IRQ_EXTINT - 32), NVIC_IRQ32_63_CLRPEND);
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}
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}
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}
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