388 lines
13 KiB
C
388 lines
13 KiB
C
/* ----------------------------------------------------------------------------
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* ATMEL Microcontroller Software Support
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* ----------------------------------------------------------------------------
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* Copyright (c) 2008, Atmel Corporation
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*
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the disclaimer below.
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*
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* Atmel's name may not be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* DISCLAIMER: THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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* DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA,
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* OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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* ----------------------------------------------------------------------------
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*/
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/// Disable traces for this file
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#ifndef NOTRACE
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#define NOTRACE
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#endif
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//------------------------------------------------------------------------------
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// Headers
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//------------------------------------------------------------------------------
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#include "pio_it.h"
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#include "pio.h"
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#include <aic/aic.h>
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#include <board.h>
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#include <utility/assert.h>
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#include <utility/trace.h>
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//------------------------------------------------------------------------------
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// Local definitions
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//------------------------------------------------------------------------------
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/// Returns the current value of a register.
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#define READ(peripheral, register) (peripheral->register)
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/// Modifies the current value of a register.
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#define WRITE(peripheral, register, value) (peripheral->register = value)
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/// Maximum number of interrupt sources that can be defined.
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#define MAX_INTERRUPT_SOURCES 7
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//------------------------------------------------------------------------------
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// Local types
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//------------------------------------------------------------------------------
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/// Describes a PIO interrupt source, including the PIO instance triggering the
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/// interrupt and the associated interrupt handler.
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typedef struct _InterruptSource {
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/// Interrupt source pin.
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const Pin *pPin;
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/// Interrupt handler.
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void (*handler)(const Pin *);
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} InterruptSource;
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//------------------------------------------------------------------------------
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// Local variables
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//------------------------------------------------------------------------------
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/// List of interrupt sources.
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static InterruptSource pSources[MAX_INTERRUPT_SOURCES];
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/// Number of currently defined interrupt sources.
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static unsigned int numSources;
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//------------------------------------------------------------------------------
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// Local functions
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//------------------------------------------------------------------------------
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//------------------------------------------------------------------------------
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/// Handles all interrupts on the given PIO controller.
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/// \param id PIO controller ID.
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/// \param pBase PIO controller base address.
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//------------------------------------------------------------------------------
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void PioInterruptHandler(unsigned int id, AT91S_PIO *pBase)
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{
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unsigned int status;
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unsigned int i;
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// Check PIO controller status
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status = pBase->PIO_ISR;
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status &= pBase->PIO_IMR;
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if (status != 0) {
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trace_LOG(trace_DEBUG, "-D- PIO interrupt on PIO controller #%d\n\r", id);
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// Check all sources
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i = 0;
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while (status != 0) {
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// There cannot be an unconfigured source enabled.
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SANITY_CHECK(i < numSources);
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// Source if configured on PIOA
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if (pSources[i].pPin->id == id) {
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// Source has PIOs which have changed
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if ((status & pSources[i].pPin->mask) != 0) {
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trace_LOG(trace_DEBUG, "-D- Interrupt source #%d triggered\n\r", i);
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pSources[i].handler(pSources[i].pPin);
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status &= ~(pSources[i].pPin->mask);
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}
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}
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i++;
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}
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}
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}
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//------------------------------------------------------------------------------
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/// Generic PIO interrupt handler. Single entry point for interrupts coming
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/// from any PIO controller (PIO A, B, C ...). Dispatches the interrupt to
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/// the user-configured handlers.
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//------------------------------------------------------------------------------
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void InterruptHandler()
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{
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#if defined(AT91C_ID_PIOA)
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// Treat PIOA interrupts
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PioInterruptHandler(AT91C_ID_PIOA, AT91C_BASE_PIOA);
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#endif
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#if defined(AT91C_ID_PIOB)
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// Treat PIOB interrupts
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PioInterruptHandler(AT91C_ID_PIOB, AT91C_BASE_PIOB);
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#endif
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#if defined(AT91C_ID_PIOC)
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// Treat PIOC interrupts
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PioInterruptHandler(AT91C_ID_PIOC, AT91C_BASE_PIOC);
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#endif
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#if defined(AT91C_ID_PIOD)
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// Treat PIOD interrupts
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PioInterruptHandler(AT91C_ID_PIOD, AT91C_BASE_PIOD);
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#endif
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#if defined(AT91C_ID_PIOE)
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// Treat PIOE interrupts
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PioInterruptHandler(AT91C_ID_PIOE, AT91C_BASE_PIOE);
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#endif
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#if defined(AT91C_ID_PIOABCD)
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// Treat PIOABCD interrupts
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#if !defined(AT91C_ID_PIOA)
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PioInterruptHandler(AT91C_ID_PIOABCD, AT91C_BASE_PIOA);
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#endif
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#if !defined(AT91C_ID_PIOB)
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PioInterruptHandler(AT91C_ID_PIOABCD, AT91C_BASE_PIOB);
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#endif
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#if !defined(AT91C_ID_PIOC)
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PioInterruptHandler(AT91C_ID_PIOABCD, AT91C_BASE_PIOC);
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#endif
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#if !defined(AT91C_ID_PIOD)
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PioInterruptHandler(AT91C_ID_PIOABCD, AT91C_BASE_PIOD);
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#endif
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#endif
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#if defined(AT91C_ID_PIOABCDE)
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// Treat PIOABCDE interrupts
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#if !defined(AT91C_ID_PIOA)
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PioInterruptHandler(AT91C_ID_PIOABCDE, AT91C_BASE_PIOA);
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#endif
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#if !defined(AT91C_ID_PIOB)
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PioInterruptHandler(AT91C_ID_PIOABCDE, AT91C_BASE_PIOB);
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#endif
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#if !defined(AT91C_ID_PIOC)
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PioInterruptHandler(AT91C_ID_PIOABCDE, AT91C_BASE_PIOC);
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#endif
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#if !defined(AT91C_ID_PIOD)
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PioInterruptHandler(AT91C_ID_PIOABCDE, AT91C_BASE_PIOD);
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#endif
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#if !defined(AT91C_ID_PIOE)
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PioInterruptHandler(AT91C_ID_PIOABCDE, AT91C_BASE_PIOE);
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#endif
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#endif
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#if defined(AT91C_ID_PIOCDE)
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// Treat PIOCDE interrupts
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#if !defined(AT91C_ID_PIOC)
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PioInterruptHandler(AT91C_ID_PIOCDE, AT91C_BASE_PIOC);
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#endif
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#if !defined(AT91C_ID_PIOD)
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PioInterruptHandler(AT91C_ID_PIOCDE, AT91C_BASE_PIOD);
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#endif
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#if !defined(AT91C_ID_PIOE)
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PioInterruptHandler(AT91C_ID_PIOCDE, AT91C_BASE_PIOE);
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#endif
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#endif
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}
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//------------------------------------------------------------------------------
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// Global functions
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//------------------------------------------------------------------------------
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//------------------------------------------------------------------------------
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/// Initializes the PIO interrupt management logic.
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/// \param priority PIO controller interrupts priority.
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//------------------------------------------------------------------------------
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void PIO_InitializeInterrupts(unsigned int priority)
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{
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trace_LOG(trace_DEBUG, "-D- PIO_Initialize()\n\r");
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SANITY_CHECK((priority & ~AT91C_AIC_PRIOR) == 0);
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// Reset sources
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numSources = 0;
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#ifdef AT91C_ID_PIOA
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// Configure PIO interrupt sources
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trace_LOG(trace_DEBUG, "-D- PIO_Initialize: Configuring PIOA\n\r");
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AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_PIOA;
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AT91C_BASE_PIOA->PIO_ISR;
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AT91C_BASE_PIOA->PIO_IDR = 0xFFFFFFFF;
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AIC_ConfigureIT(AT91C_ID_PIOA, priority, InterruptHandler);
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AIC_EnableIT(AT91C_ID_PIOA);
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#endif
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#ifdef AT91C_ID_PIOB
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trace_LOG(trace_DEBUG, "-D- PIO_Initialize: Configuring PIOB\n\r");
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AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_PIOB;
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AT91C_BASE_PIOB->PIO_ISR;
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AT91C_BASE_PIOB->PIO_IDR = 0xFFFFFFFF;
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AIC_ConfigureIT(AT91C_ID_PIOB, priority, InterruptHandler);
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AIC_EnableIT(AT91C_ID_PIOB);
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#endif
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#ifdef AT91C_ID_PIOC
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trace_LOG(trace_DEBUG, "-D- PIO_Initialize: Configuring PIOC\n\r");
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AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_PIOC;
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AT91C_BASE_PIOC->PIO_ISR;
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AT91C_BASE_PIOC->PIO_IDR = 0xFFFFFFFF;
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AIC_ConfigureIT(AT91C_ID_PIOC, priority, InterruptHandler);
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AIC_EnableIT(AT91C_ID_PIOC);
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#endif
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#ifdef AT91C_ID_PIOD
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trace_LOG(trace_DEBUG, "-D- PIO_Initialize: Configuring PIOD\n\r");
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AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_PIOD;
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AT91C_BASE_PIOC->PIO_ISR;
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AT91C_BASE_PIOC->PIO_IDR = 0xFFFFFFFF;
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AIC_ConfigureIT(AT91C_ID_PIOD, priority, InterruptHandler);
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AIC_EnableIT(AT91C_ID_PIOD);
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#endif
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#ifdef AT91C_ID_PIOE
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trace_LOG(trace_DEBUG, "-D- PIO_Initialize: Configuring PIOE\n\r");
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AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_PIOE;
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AT91C_BASE_PIOC->PIO_ISR;
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AT91C_BASE_PIOC->PIO_IDR = 0xFFFFFFFF;
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AIC_ConfigureIT(AT91C_ID_PIOE, priority, InterruptHandler);
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AIC_EnableIT(AT91C_ID_PIOE);
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#endif
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#if defined(AT91C_ID_PIOABCD)
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// Treat PIOABCD interrupts
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#if !defined(AT91C_ID_PIOA) \
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&& !defined(AT91C_ID_PIOB) \
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&& !defined(AT91C_ID_PIOC) \
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&& !defined(AT91C_ID_PIOD)
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trace_LOG(trace_DEBUG, "-D- PIO_Initialize: Configuring PIOABCD\n\r");
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AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_PIOABCD;
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AT91C_BASE_PIOA->PIO_ISR;
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AT91C_BASE_PIOA->PIO_IDR = 0xFFFFFFFF;
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AIC_ConfigureIT(AT91C_ID_PIOABCD, priority, InterruptHandler);
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AIC_EnableIT(AT91C_ID_PIOABCD);
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#endif
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#endif
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#if defined(AT91C_ID_PIOABCDE)
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// Treat PIOABCDE interrupts
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#if !defined(AT91C_ID_PIOA) \
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&& !defined(AT91C_ID_PIOB) \
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&& !defined(AT91C_ID_PIOC) \
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&& !defined(AT91C_ID_PIOD) \
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&& !defined(AT91C_ID_PIOE)
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trace_LOG(trace_DEBUG, "-D- PIO_Initialize: Configuring PIOABCDE\n\r");
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AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_PIOABCDE;
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AT91C_BASE_PIOA->PIO_ISR;
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AT91C_BASE_PIOA->PIO_IDR = 0xFFFFFFFF;
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AIC_ConfigureIT(AT91C_ID_PIOABCDE, priority, InterruptHandler);
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AIC_EnableIT(AT91C_ID_PIOABCDE);
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#endif
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#endif
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#if defined(AT91C_ID_PIOCDE)
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// Treat PIOCDE interrupts
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#if !defined(AT91C_ID_PIOC) \
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&& !defined(AT91C_ID_PIOD) \
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&& !defined(AT91C_ID_PIOE)
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trace_LOG(trace_DEBUG, "-D- PIO_Initialize: Configuring PIOC\n\r");
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AT91C_BASE_PMC->PMC_PCER = 1 << AT91C_ID_PIOCDE;
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AT91C_BASE_PIOC->PIO_ISR;
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AT91C_BASE_PIOC->PIO_IDR = 0xFFFFFFFF;
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AIC_ConfigureIT(AT91C_ID_PIOCDE, priority, InterruptHandler);
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AIC_EnableIT(AT91C_ID_PIOCDE);
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#endif
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#endif
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}
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//------------------------------------------------------------------------------
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/// Configures an interrupt source.
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/// \param pPin Interrupt source.
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/// \param handler Desired interrupt handler for the source.
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//------------------------------------------------------------------------------
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void PIO_ConfigureIt(const Pin *pPin, void (*handler)(const Pin *))
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{
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InterruptSource *pSource;
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trace_LOG(trace_DEBUG, "-D- PIO_ConfigureIt()\n\r");
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SANITY_CHECK(pPin);
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ASSERT(numSources < MAX_INTERRUPT_SOURCES,
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"-F- PIO_ConfigureIt: Increase MAX_INTERRUPT_SOURCES\n\r");
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// Define new source
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trace_LOG(trace_DEBUG, "-D- PIO_ConfigureIt: Defining new source #%d.\n\r", numSources);
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pSource = &(pSources[numSources]);
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pSource->pPin = pPin;
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pSource->handler = handler;
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numSources++;
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}
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//------------------------------------------------------------------------------
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/// Enables the given interrupt source if it has been configured.
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/// \param pPin Interrupt source to enable.
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//------------------------------------------------------------------------------
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void PIO_EnableIt(const Pin *pPin)
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{
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trace_LOG(trace_DEBUG, "-D- PIO_EnableIt()\n\r");
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SANITY_CHECK(pPin);
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#ifndef NOASSERT
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unsigned int i = 0;
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unsigned char found = 0;
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while ((i < numSources) && !found) {
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if (pSources[i].pPin == pPin) {
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found = 1;
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}
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i++;
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}
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ASSERT(found, "-F- PIO_EnableIt: Interrupt source has not been configured\n\r");
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#endif
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pPin->pio->PIO_ISR;
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pPin->pio->PIO_IER = pPin->mask;
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}
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//------------------------------------------------------------------------------
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/// Disables a given interrupt source.
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/// \param pPin Interrupt source to disable.
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//------------------------------------------------------------------------------
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void PIO_DisableIt(const Pin *pPin)
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{
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SANITY_CHECK(pPin);
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trace_LOG(trace_DEBUG, "-D- PIO_DisableIt()\n\r");
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pPin->pio->PIO_IDR = pPin->mask;
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}
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