diff options
Diffstat (limited to 'nuttx/arch/arm/src/lpc17xx/lpc17_clrpend.c')
-rwxr-xr-x | nuttx/arch/arm/src/lpc17xx/lpc17_clrpend.c | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/nuttx/arch/arm/src/lpc17xx/lpc17_clrpend.c b/nuttx/arch/arm/src/lpc17xx/lpc17_clrpend.c new file mode 100755 index 000000000..d8f27e4db --- /dev/null +++ b/nuttx/arch/arm/src/lpc17xx/lpc17_clrpend.c @@ -0,0 +1,97 @@ +/**************************************************************************** + * arch/arm/src/lpc17/lpc17_clrpend.c + * arch/arm/src/chip/lpc17_clrpend.c + * + * Copyright (C) 2010 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <arch/irq.h> + +#include "nvic.h" +#include "up_arch.h" +#include "lpc17_internal.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: lpc17_clrpend + * + * Description: + * Clear a pending interrupt at the NVIC. This does not seem to be required + * for most interrupts. Don't know why... but the LPC1766 Ethernet EMAC + * interrupt definitely needs it! + * + * I keep it in a separate file so that it will not increase the footprint + * on LPC17xx platforms that do not need this function. + * + ****************************************************************************/ + +void lpc17_clrpend(int irq) +{ + /* Check for external interrupt */ + + if (irq >= LPC17_IRQ_EXTINT) + { + if (irq < (LPC17_IRQ_EXTINT+32)) + { + putreg32(1 << (irq - LPC17_IRQ_EXTINT), NVIC_IRQ0_31_CLRPEND); + } + else if (irq < LPC17_IRQ_NIRQS) + { + putreg32(1 << (irq - LPC17_IRQ_EXTINT - 32), NVIC_IRQ32_63_CLRPEND); + } + } +} |