aic.c
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上传日期:2022-07-16
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- /* ----------------------------------------------------------------------------
- * ATMEL Microcontroller Software Support
- * ----------------------------------------------------------------------------
- * Copyright (c) 2008, Atmel Corporation
- *
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * - Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the disclaimer below.
- *
- * Atmel's name may not be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
- * DISCLAIMED. IN NO EVENT SHALL ATMEL 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.
- * ----------------------------------------------------------------------------
- */
- //------------------------------------------------------------------------------
- // Headers
- //------------------------------------------------------------------------------
- #include "aic.h"
- #include <board.h>
- //------------------------------------------------------------------------------
- // Global functions
- //------------------------------------------------------------------------------
- //------------------------------------------------------------------------------
- /// Configures an interrupt in the AIC. The interrupt is identified by its
- /// source (AT91C_ID_xxx) and is configured to use the specified mode and
- /// interrupt handler function. Mode is the value that will be put in AIC_SMRx
- /// and the function address will be set in AIC_SVRx.
- /// The interrupt is disabled before configuration, so it is useless
- /// to do it before calling this function. When AIC_ConfigureIT returns, the
- /// interrupt will always be disabled and cleared; it must be enabled by a
- /// call to AIC_EnableIT().
- /// param source Interrupt source to configure.
- /// param mode Triggering mode and priority of the interrupt.
- /// param handler Interrupt handler function.
- //------------------------------------------------------------------------------
- void AIC_ConfigureIT(
- unsigned int source,
- unsigned int mode,
- void (*handler)(void))
- {
- // Disable the interrupt first
- AT91C_BASE_AIC->AIC_IDCR = 1 << source;
- // Configure mode and handler
- AT91C_BASE_AIC->AIC_SMR[source] = mode;
- AT91C_BASE_AIC->AIC_SVR[source] = (unsigned int) handler;
- // Clear interrupt
- AT91C_BASE_AIC->AIC_ICCR = 1 << source;
- }
- //------------------------------------------------------------------------------
- /// Enables interrupts coming from the given (unique) source (AT91C_ID_xxx).
- /// param source Interrupt source to enable.
- //------------------------------------------------------------------------------
- void AIC_EnableIT(unsigned int source)
- {
- AT91C_BASE_AIC->AIC_IECR = 1 << source;
- }
- //------------------------------------------------------------------------------
- /// Disables interrupts coming from the given (unique) source (AT91C_ID_xxx).
- /// param source Interrupt source to enable.
- //------------------------------------------------------------------------------
- void AIC_DisableIT(unsigned int source)
- {
- AT91C_BASE_AIC->AIC_IDCR = 1 << source;
- }