174 lines
6.8 KiB
C
174 lines
6.8 KiB
C
/*
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LUFA Library
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Copyright (C) Dean Camera, 2013.
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dean [at] fourwalledcubicle [dot] com
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www.lufa-lib.org
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*/
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/*
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Copyright 2013 Dean Camera (dean [at] fourwalledcubicle [dot] com)
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Permission to use, copy, modify, distribute, and sell this
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software and its documentation for any purpose is hereby granted
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without fee, provided that the above copyright notice appear in
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all copies and that both that the copyright notice and this
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permission notice and warranty disclaimer appear in supporting
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documentation, and that the name of the author not be used in
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advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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The author disclaims all warranties with regard to this
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software, including all implied warranties of merchantability
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and fitness. In no event shall the author be liable for any
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special, indirect or consequential damages or any damages
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whatsoever resulting from loss of use, data or profits, whether
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in an action of contract, negligence or other tortious action,
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arising out of or in connection with the use or performance of
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this software.
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*/
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/** \file
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* \brief Interrupt Controller Driver for the AVR32 UC3 microcontrollers.
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*
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* Interrupt controller driver for the AVR32 UC3 microcontrollers, for the configuration of interrupt
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* handlers within the device.
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*/
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/** \ingroup Group_PlatformDrivers_UC3
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* \defgroup Group_PlatformDrivers_UC3Interrupts Interrupt Controller Driver - LUFA/Platform/UC3/InterruptManagement.h
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* \brief Interrupt Controller Driver for the AVR32 UC3 microcontrollers.
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*
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* \section Sec_Dependencies Module Source Dependencies
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* The following files must be built with any user project that uses this module:
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* - LUFA/Platform/UC3/InterruptManagement.c <i>(Makefile source module name: LUFA_SRC_PLATFORM)</i>
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* - LUFA/Platform/UC3/Exception.S <i>(Makefile source module name: LUFA_SRC_PLATFORM)</i>
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*
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* \section Sec_ModDescription Module Description
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* Interrupt controller driver for the AVR32 UC3 microcontrollers, for the configuration of interrupt
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* handlers within the device.
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*
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* Usage Example:
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* \code
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* #include <LUFA/Platform/UC3/InterruptManagement.h>
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*
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* ISR(USB_Group_IRQ_Handler)
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* {
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* // USB group handler code here
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* }
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*
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* void main(void)
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* {
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* INTC_Init();
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* INTC_RegisterGroupHandler(INTC_IRQ_GROUP(AVR32_USBB_IRQ), AVR32_INTC_INT0, USB_Group_IRQ_Handler);
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* }
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* \endcode
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*
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* @{
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*/
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#ifndef _UC3_INTERRUPT_MANAGEMENT_H_
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#define _UC3_INTERRUPT_MANAGEMENT_H_
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/* Includes: */
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#include "../../Common/Common.h"
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/* Enable C linkage for C++ Compilers: */
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#if defined(__cplusplus)
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extern "C" {
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#endif
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/* Private Interface - For use in library only: */
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#if !defined(__DOXYGEN__)
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/* Type Defines: */
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typedef void (*InterruptHandlerPtr_t)(void);
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/* External Variables: */
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#if defined(__INCLUDE_FROM_INTMANAGEMENT_C)
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extern const void EVBA_Table;
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#endif
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extern InterruptHandlerPtr_t InterruptHandlers[AVR32_INTC_NUM_INT_GRPS];
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extern const uint32_t Autovector_Table[];
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#endif
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/* Public Interface - May be used in end-application: */
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/* Macros: */
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/** Converts a given interrupt index into its associated interrupt group.
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*
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* \param[in] IRQIndex Index of the interrupt request to convert.
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*
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* \return Interrupt group number associated with the interrupt index.
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*/
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#define INTC_IRQ_GROUP(IRQIndex) (IRQIndex / 32)
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/** Converts a given interrupt index into its associated interrupt line.
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*
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* \param[in] IRQIndex Index of the interrupt request to convert.
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*
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* \return Interrupt line number associated with the interrupt index.
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*/
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#define INTC_IRQ_LINE(IRQIndex) (IRQIndex % 32)
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/* Function Prototypes: */
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/** Initializes the interrupt controller ready to handle interrupts. This must be called at the
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* start of the user program before any interrupts are registered or enabled.
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*/
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void INTC_Init(void);
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/** Retrieves the associated interrupt handler for the interrupt group currently being fired. This
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* is called directly from the exception handler routine before dispatching to the ISR.
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*
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* \param[in] InterruptLevel Priority level of the interrupt.
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*
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* \return Pointer to the associated interrupt handler function, or NULL if no handler set.
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*/
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InterruptHandlerPtr_t INTC_GetInterruptHandler(const uint_reg_t InterruptLevel);
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/* Inline Functions: */
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/** Registers a handler for a given interrupt group. On the AVR32 UC3 devices, interrupts are grouped by
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* peripheral. To save on SRAM used, a single ISR handles all interrupt lines within a single group - to
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* determine the exact line that has interrupted within the group ISR handler, use \ref INTC_GetGroupInterrupts().
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*
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* If multiple interrupts with the same group are registered, the last registered handler will become the
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* handler called for interrupts raised within that group.
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*
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* To obtain the group number of a specific interrupt index, use the \ref INTC_IRQ_GROUP() macro.
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*
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* \param[in] GroupNumber Group number of the interrupt group to register a handler for.
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* \param[in] InterruptLevel Priority level for the specified interrupt, a \c AVR32_INTC_INT* mask.
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* \param[in] Handler Address of the ISR handler for the interrupt group.
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*/
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static inline void INTC_RegisterGroupHandler(const uint16_t GroupNumber,
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const uint8_t InterruptLevel,
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const InterruptHandlerPtr_t Handler) ATTR_ALWAYS_INLINE;
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static inline void INTC_RegisterGroupHandler(const uint16_t GroupNumber,
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const uint8_t InterruptLevel,
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const InterruptHandlerPtr_t Handler)
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{
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InterruptHandlers[GroupNumber] = Handler;
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AVR32_INTC.ipr[GroupNumber] = Autovector_Table[InterruptLevel];
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}
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/** Retrieves the pending interrupts for a given interrupt group. The result of this function should be masked
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* against interrupt request indexes converted to a request line number via the \ref INTC_IRQ_LINE() macro. To
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* obtain the group number of a given interrupt request, use the \ref INTC_IRQ_GROUP() macro.
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*
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* \param[in] GroupNumber Group number of the interrupt group to check.
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*
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* \return Mask of pending interrupt lines for the given interrupt group.
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*/
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static inline uint_reg_t INTC_GetGroupInterrupts(const uint16_t GroupNumber) ATTR_ALWAYS_INLINE;
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static inline uint_reg_t INTC_GetGroupInterrupts(const uint16_t GroupNumber)
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{
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return AVR32_INTC.irr[GroupNumber];
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}
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/* Disable C linkage for C++ Compilers: */
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#if defined(__cplusplus)
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}
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#endif
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#endif
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/** @} */
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