diff options
| author | Harald Welte <laforge@gnumonks.org> | 2011-07-04 20:52:54 +0200 |
|---|---|---|
| committer | Harald Welte <laforge@gnumonks.org> | 2011-07-04 20:52:54 +0200 |
| commit | 044ad7c3987460ede48ff27afd6bdb0ca05a0432 (patch) | |
| tree | 924818cdb0d39ca08aec540d18da7bd406eaae8c /peripherals/irq/aic.c | |
import at91lib from at91lib_20100901_softpack_1_9_v_1_0_svn_v1501120100901_softpack_1_9_v_1_0_svn_v15011
it's sad to see that atmel doesn't publish their svn repo or has
a centralized location or even puts proper version/release info
into the library itself
Diffstat (limited to 'peripherals/irq/aic.c')
| -rw-r--r-- | peripherals/irq/aic.c | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/peripherals/irq/aic.c b/peripherals/irq/aic.c new file mode 100644 index 0000000..d2353f5 --- /dev/null +++ b/peripherals/irq/aic.c @@ -0,0 +1,91 @@ +/* ----------------------------------------------------------------------------
+ * 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 <board.h>
+#include "irq.h"
+
+#ifndef AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL
+ /// Interrupt is internal and uses a logical 1 level.
+ #define AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL AT91C_AIC_SRCTYPE_INT_LEVEL_SENSITIVE
+#endif
+
+//------------------------------------------------------------------------------
+// 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 IRQ_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 IRQ_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 IRQ_DisableIT(unsigned int source)
+{
+ AT91C_BASE_AIC->AIC_IDCR = 1 << source;
+}
+
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