LUFA/Platform/UC3/InterruptManagement.h

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2011.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6            www.lufa-lib.org
   7 */
   8
   9 /*
  10   Copyright 2011  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaim all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 #ifndef _INTERRUPT_MANAGEMENT_H_
  32 #define _INTERRUPT_MANAGEMENT_H_
  33
  34         /* Includes: */
  35                 #include <avr32/io.h>
  36                 #include <stdbool.h>
  37                 #include <stdint.h>
  38
  39                 #include <LUFA/Common/Common.h>
  40
  41         /* Macros: */
  42                 #if !defined(ISR)
  43                         #define ISR(Name)                 void Name (void) __attribute__((__interrupt__)); void Name (void)
  44                 #endif
  45
  46                 #define INTC_EnableInterrupts()   do { GCC_MEMORY_BARRIER(); __builtin_csrf(AVR32_SR_GM_OFFSET); } while (0)
  47                 #define INTC_DisableInterrupts()  do { __builtin_ssrf(AVR32_SR_GM_OFFSET); GCC_MEMORY_BARRIER(); } while (0)
  48
  49         /* Type Defines: */
  50                 typedef void (*InterruptHandlerPtr_t)(void);
  51
  52         /* External Variables: */
  53                 extern const void            EVBA_Table;
  54                 extern const uint32_t        Autovector_Table[];
  55                 extern InterruptHandlerPtr_t InterruptHandlers[AVR32_INTC_NUM_INT_GRPS];
  56
  57         /* Function Prototypes: */
  58                 void INTC_Init(void);
  59
  60         /* Inline Functions: */
  61                 /** Registers a handler for a given interrupt group. On the AVR32 UC3 devices, interrupts are grouped by
  62                  *  peripheral. To save on SRAM used, a single ISR handles all interrupt lines within a single group - to
  63                  *  determine the exact line that has interrupted within the group ISR handler, examine the module's interrupt
  64                  *  flag register bits.
  65                  *
  66                  *  If multiple interrupts with the same group are registered, the last registered handler will become the
  67                  *  handler called for interrupts raised within that group.
  68                  *
  69                  *  \param[in] InterruptRequest  Interrupt request index for the given interrupt, a AVR32_*_IRQ mask.
  70                  *  \param[in] InterruptLevel    Priority level for the specified interrupt, a AVR32_INTC_INT* mask.
  71                  *  \param[in] Handler           Address of the ISR handler for the interrupt group.
  72                  */
  73                 static inline void INTC_RegisterGroupHandler(const uint16_t InterruptRequest,
  74                                                                                                      const uint8_t  InterruptLevel,
  75                                                                                                      const InterruptHandlerPtr_t Handler)
  76                 {
  77                         uint8_t InterruptGroup = (InterruptRequest >> 5);
  78
  79                         InterruptHandlers[InterruptGroup] = Handler;
  80                         AVR32_INTC.ipr[InterruptGroup]    = Autovector_Table[InterruptLevel];
  81                 }
  82
  83 #endif