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authorHarald Welte <laforge@gnumonks.org>2011-07-04 20:52:54 +0200
committerHarald Welte <laforge@gnumonks.org>2011-07-04 20:52:54 +0200
commit044ad7c3987460ede48ff27afd6bdb0ca05a0432 (patch)
tree924818cdb0d39ca08aec540d18da7bd406eaae8c /peripherals/irq
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')
-rw-r--r--peripherals/irq/aic.c91
-rw-r--r--peripherals/irq/irq.dir38
-rw-r--r--peripherals/irq/irq.h84
-rw-r--r--peripherals/irq/nvic.c144
-rw-r--r--peripherals/irq/nvic.h55
5 files changed, 412 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;
+}
+
diff --git a/peripherals/irq/irq.dir b/peripherals/irq/irq.dir
new file mode 100644
index 0000000..06e017a
--- /dev/null
+++ b/peripherals/irq/irq.dir
@@ -0,0 +1,38 @@
+/* ----------------------------------------------------------------------------
+ * 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.
+ * ----------------------------------------------------------------------------
+ */
+
+//------------------------------------------------------------------------------
+/// \dir
+///
+/// !!!Purpose
+///
+/// This directory contains an API for Configure the Interrupt controller.
+/// The interrupt controller for SAM7 and SAM9 is AIC, and the interrupt controller
+/// for SAM3 is NVIC.
+//------------------------------------------------------------------------------ \ No newline at end of file
diff --git a/peripherals/irq/irq.h b/peripherals/irq/irq.h
new file mode 100644
index 0000000..5f0e203
--- /dev/null
+++ b/peripherals/irq/irq.h
@@ -0,0 +1,84 @@
+/* ----------------------------------------------------------------------------
+ * 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.
+ * ----------------------------------------------------------------------------
+ */
+
+//------------------------------------------------------------------------------
+/// \unit
+///
+/// !Purpose
+///
+/// Methods and definitions for configuring interrupts.
+///
+/// !Usage
+///
+/// -# Configure an interrupt source using IRQ_ConfigureIT
+/// -# Enable or disable interrupt generation of a particular source with
+/// IRQ_EnableIT and IRQ_DisableIT.
+///
+/// \note Most of the time, peripheral interrupts must be also configured
+/// inside the peripheral itself.
+//------------------------------------------------------------------------------
+
+#ifndef IRQ_H
+#define IRQ_H
+
+//------------------------------------------------------------------------------
+// Headers
+//------------------------------------------------------------------------------
+
+#include <board.h>
+#if defined(cortexm3)
+#include <core_cm3.h>
+#endif
+
+//------------------------------------------------------------------------------
+// Definitions
+//------------------------------------------------------------------------------
+#if 0
+#if defined(cortexm3)
+#ifdef __NVIC_PRIO_BITS
+#undef __NVIC_PRIO_BITS
+#define __NVIC_PRIO_BITS ((SCB->AIRCR & 0x700) >> 8)
+#endif
+#endif
+#endif
+
+//------------------------------------------------------------------------------
+// Global functions
+//------------------------------------------------------------------------------
+
+extern void IRQ_ConfigureIT(unsigned int source,
+ unsigned int mode, // mode for AIC, priority for NVIC
+ void( *handler )( void )); // ISR
+
+extern void IRQ_EnableIT(unsigned int source);
+
+extern void IRQ_DisableIT(unsigned int source);
+
+#endif //#ifndef IRQ_H
+
diff --git a/peripherals/irq/nvic.c b/peripherals/irq/nvic.c
new file mode 100644
index 0000000..b7d40b2
--- /dev/null
+++ b/peripherals/irq/nvic.c
@@ -0,0 +1,144 @@
+/* ----------------------------------------------------------------------------
+ * 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"
+#include "exceptions.h"
+#include <utility/trace.h>
+
+/// The index of IRQ handler in the exception table
+#define NVIC_IRQ_HANDLER_INDEX 16
+
+//------------------------------------------------------------------------------
+// Global functions
+//------------------------------------------------------------------------------
+
+//------------------------------------------------------------------------------
+/// Configures an interrupt in the NVIC. The interrupt is identified by its
+/// source (AT91C_ID_xxx) and is configured to a specified priority and
+/// interrupt handler function. priority is the value that will be put in NVIC_IPRx
+/// and the function address will be set in "ExceptionTable". The parameter priority
+/// will include the preemptionPriority and the subPriority, where the subPriority
+/// defined in the B[7:0] of the parameter "priority", and the preemptionPriority defined
+/// in the B[15:8] of the parameter "priority".
+/// The interrupt is disabled before configuration, so it is useless
+/// to do it before calling this function. When NVIC_ConfigureIT returns, the
+/// interrupt will always be disabled and cleared; it must be enabled by a
+/// call to NVIC_EnableIT().
+/// \param source Interrupt source to configure.
+/// \param priority Pre-emption priority (B[15:8] )+ subPriority (B[7:0])
+/// \param handler Interrupt handler function.
+//------------------------------------------------------------------------------
+void IRQ_ConfigureIT(
+ unsigned int source,
+ //unsigned int preemptionPriority,
+ //unsigned int subPriority,
+ unsigned int priority,
+ IntFunc handler)
+{
+ unsigned int priGroup = __NVIC_PRIO_BITS;
+ unsigned int nPre = 8 - priGroup;
+ unsigned int nSub = priGroup;
+ unsigned int preemptionPriority;
+ unsigned int subPriority;
+ unsigned int IRQpriority;
+
+ preemptionPriority = (priority & 0xff00) >> 8;
+ subPriority = (priority & 0xff);
+
+ // Disable the interrupt first
+ NVIC_DisableIRQ((IRQn_Type)source);
+
+ // Clear any pending status
+ NVIC_ClearPendingIRQ((IRQn_Type)source);
+
+ // Configure interrupt handler
+ //if (handler == 0) handler = IrqHandlerNotUsed;
+ // GetExceptionTable()[NVIC_IRQ_HANDLER_INDEX + source] = handler;
+
+ if (subPriority >= (0x01 << nSub))
+ subPriority = (0x01 << nSub) - 1;
+ if (preemptionPriority >= (0x01 << nPre))
+ preemptionPriority = (0x01 << nPre) - 1;
+
+ IRQpriority = (subPriority | (preemptionPriority << nSub));
+ NVIC_SetPriority((IRQn_Type)source, IRQpriority);
+}
+
+//------------------------------------------------------------------------------
+/// Enables interrupt coming from the given (unique) source (AT91C_ID_xxx).
+/// \param source Interrupt source to enable.
+//------------------------------------------------------------------------------
+void IRQ_EnableIT(unsigned int source)
+{
+ NVIC_EnableIRQ((IRQn_Type)source);
+}
+
+//------------------------------------------------------------------------------
+/// Disables interrupt coming from the given (unique) source (AT91C_ID_xxx).
+/// \param source Interrupt source to disable.
+//------------------------------------------------------------------------------
+void IRQ_DisableIT(unsigned int source)
+{
+ NVIC_DisableIRQ((IRQn_Type)source);
+}
+
+//------------------------------------------------------------------------------
+/// Set interrupt pending bit from the given (unique) source (AT91C_ID_xxx).
+/// \param source Interrupt source to set.
+//------------------------------------------------------------------------------
+void NVIC_SetPending(unsigned int source)
+{
+ NVIC_SetPendingIRQ((IRQn_Type)source);
+}
+
+//------------------------------------------------------------------------------
+/// Clear interrupt pending bit from the given (unique) source (AT91C_ID_xxx).
+/// \param source Interrupt source to clear.
+//------------------------------------------------------------------------------
+void NVIC_ClrPending(unsigned int source)
+{
+ NVIC_ClearPendingIRQ((IRQn_Type)source);
+}
+
+#if !defined(USE_CMSIS_on)
+//------------------------------------------------------------------------------
+/// Use the Software Trigger Interrupt Register to pend an interrupt.
+/// \param source Interrupt source to trigger.
+//------------------------------------------------------------------------------
+void NVIC_Swi(unsigned int source)
+{
+ AT91C_BASE_NVIC->NVIC_STIR = source;
+}
+#endif
+
diff --git a/peripherals/irq/nvic.h b/peripherals/irq/nvic.h
new file mode 100644
index 0000000..ff33ab0
--- /dev/null
+++ b/peripherals/irq/nvic.h
@@ -0,0 +1,55 @@
+/* ----------------------------------------------------------------------------
+ * 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.
+ * ----------------------------------------------------------------------------
+ */
+
+//------------------------------------------------------------------------------
+/// \unit
+///
+/// !Purpose
+///
+/// Methods and definitions for configuring interrupts using the Nested
+/// Vectored Interrupt Controller (NVIC).
+///
+/// !Usage
+///
+/// -# Configure interrupt source by implementing specific functions and define
+/// ...
+/// -# Configure the interrupt settings using NVIC_ConfigureIT
+/// -# Enable or disable interrupt generation of a particular source with
+/// NVIC_EnableIT and NVIC_DisableIT.
+///
+/// \note Most of the time, peripheral interrupts must be also configured
+/// inside the peripheral itself.
+//------------------------------------------------------------------------------
+
+#ifndef NVIC_H
+#define NVIC_H
+
+
+#endif //#ifndef NVIC_H
+
personal git repositories of Harald Welte. Your mileage may vary