/* ---------------------------------------------------------------------------- | |
* 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 | |
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* ---------------------------------------------------------------------------- | |
*/ | |
//------------------------------------------------------------------------------ | |
// 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; | |
} | |