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{attach/detach}Interrupt() functions.
This commit is contained in:
Cristian Maglie
parent
e7193ac42c
commit
921dfe794f
@ -1,5 +1,5 @@
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/*
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Copyright (c) 2011 Arduino. All right reserved.
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Copyright (c) 2011-2012 Arduino. All right reserved.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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@ -18,38 +18,152 @@
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#include "WInterrupts.h"
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typedef void (*interruptCB)(void);
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static int pinMapping[EXTERNAL_NUM_INTERRUPTS] = { 2, 3, 4, 5, 6, 7, 8 };
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static interruptCB callbacksPioA[32];
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static interruptCB callbacksPioB[32];
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static interruptCB callbacksPioC[32];
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/* Configure PIO interrupt sources */
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static void __initialize() {
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int i;
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for (i=0; i<32; i++) {
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callbacksPioA[i] = NULL;
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callbacksPioB[i] = NULL;
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callbacksPioC[i] = NULL;
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}
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pmc_enable_periph_clk(ID_PIOA);
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NVIC_DisableIRQ(PIOA_IRQn);
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NVIC_ClearPendingIRQ(PIOA_IRQn);
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NVIC_SetPriority(PIOA_IRQn, 0);
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NVIC_EnableIRQ(PIOA_IRQn);
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pmc_enable_periph_clk(ID_PIOB);
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NVIC_DisableIRQ(PIOB_IRQn);
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NVIC_ClearPendingIRQ(PIOB_IRQn);
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NVIC_SetPriority(PIOB_IRQn, 0);
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NVIC_EnableIRQ(PIOB_IRQn);
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pmc_enable_periph_clk(ID_PIOC);
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NVIC_DisableIRQ(PIOC_IRQn);
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NVIC_ClearPendingIRQ(PIOC_IRQn);
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NVIC_SetPriority(PIOC_IRQn, 0);
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NVIC_EnableIRQ(PIOC_IRQn);
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}
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void attachInterrupt(uint32_t interruptNum, void (*callback)(void), uint32_t mode)
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{
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if (interruptNum >= EXTERNAL_NUM_INTERRUPTS)
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return;
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static int enabled = 0;
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if (!enabled) {
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__initialize();
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enabled = 1;
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}
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// Retrieve pin information
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uint32_t pin = pinMapping[interruptNum];
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Pio *pio = g_APinDescription[pin].pPort;
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uint32_t mask = g_APinDescription[pin].ulPin;
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uint32_t pos = 0;
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uint32_t t;
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for (t = mask; t>1; t>>=1, pos++)
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;
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// Set callback function
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if (pio == PIOA)
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callbacksPioA[pos] = callback;
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if (pio == PIOB)
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callbacksPioB[pos] = callback;
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if (pio == PIOC)
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callbacksPioC[pos] = callback;
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// Configure the interrupt mode
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if (mode == CHANGE) {
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// Disable additional interrupt mode (detects both rising and falling edges)
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pio->PIO_AIMDR = mask;
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} else {
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// Enable additional interrupt mode
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pio->PIO_AIMER = mask;
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// Select mode of operation
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if (mode == LOW) {
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pio->PIO_LSR = mask; // "Level" Select Register
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pio->PIO_FELLSR = mask; // "Falling Edge / Low Level" Select Register
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}
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if (mode == HIGH) {
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pio->PIO_LSR = mask; // "Level" Select Register
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pio->PIO_REHLSR = mask; // "Rising Edge / High Level" Select Register
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}
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if (mode == FALLING) {
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pio->PIO_ESR = mask; // "Edge" Select Register
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pio->PIO_FELLSR = mask; // "Falling Edge / Low Level" Select Register
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}
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if (mode == RISING) {
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pio->PIO_ESR = mask; // "Edge" Select Register
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pio->PIO_REHLSR = mask; // "Rising Edge / High Level" Select Register
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}
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}
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// Enable interrupt
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pio->PIO_IER = mask;
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}
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void detachInterrupt( uint32_t interruptNum )
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{
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if (interruptNum >= EXTERNAL_NUM_INTERRUPTS)
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return;
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// Retrieve pin information
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uint32_t pin = pinMapping[interruptNum];
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Pio *pio = g_APinDescription[pin].pPort;
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uint32_t mask = g_APinDescription[pin].ulPin;
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// Disable interrupt
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pio->PIO_IDR = mask;
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}
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** PIO interrupt handlers array */
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/*volatile*/ static voidFuncPtr g_apfn_IntFunc[EXTERNAL_NUM_INTERRUPTS]={ 0 } ;
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void attachInterrupt( uint32_t ulInterrupt, void (*pfn_UserFunc)(void), uint32_t ulMode )
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{
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if ( ulInterrupt < EXTERNAL_NUM_INTERRUPTS )
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{
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g_apfn_IntFunc[ulInterrupt] = pfn_UserFunc ;
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// Configure the interrupt mode (trigger on low input, any change, rising
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// edge, or falling edge). The mode constants were chosen to correspond
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// to the configuration bits in the hardware register, so we simply shift
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// the mode into place.
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// Enable the interrupt.
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}
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void PIOA_Handler(void) {
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uint32_t isr = PIOA->PIO_ISR;
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uint32_t i;
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for (i=0; i<32; i++, isr>>=1) {
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if ((isr & 0x1) == 0)
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continue;
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if (callbacksPioA[i])
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callbacksPioA[i]();
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}
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}
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void detachInterrupt( uint32_t ulInterrupt )
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{
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if ( ulInterrupt < EXTERNAL_NUM_INTERRUPTS )
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{
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/* Disable the interrupt. */
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void PIOB_Handler(void) {
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uint32_t isr = PIOB->PIO_ISR;
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uint32_t i;
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for (i=0; i<32; i++, isr>>=1) {
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if ((isr & 0x1) == 0)
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continue;
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if (callbacksPioB[i])
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callbacksPioB[i]();
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}
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}
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g_apfn_IntFunc[ulInterrupt] = NULL ;
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}
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void PIOC_Handler(void) {
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uint32_t isr = PIOC->PIO_ISR;
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uint32_t i;
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for (i=0; i<32; i++, isr>>=1) {
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if ((isr & 0x1) == 0)
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continue;
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if (callbacksPioC[i])
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callbacksPioC[i]();
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}
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}
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#ifdef __cplusplus
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@ -1,5 +1,5 @@
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/*
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Copyright (c) 2011 Arduino. All right reserved.
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Copyright (c) 2011-2012 Arduino. All right reserved.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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@ -25,55 +25,9 @@
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extern "C" {
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#endif
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void attachInterrupt(uint32_t interruptNum, void (*callback)(void), uint32_t mode);
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//typedef struct _InterruptSource
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//{
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// /* Pointer to the source pin instance. */
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// PinDescription *pPin ;
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//
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// /* Interrupt handler. */
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// void (*handler)( const PinDescription *pPin ) ;
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//} InterruptSource ;
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/*
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* \brief Specifies a function to call when an external interrupt occurs.
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* Replaces any previous function that was attached to the interrupt.
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* All Arduino SAM3 based boards pins can be switched into INPUT mode and have
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* an interrupt user function attached to an event.
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*
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* \param ulInterrupt
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* \param pfn_UserFunc
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* \param ulMode
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*
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PIO_IT_RE_OR_HL = Interrupt High Level/Rising Edge detection is active
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PIO_IT_EDGE = Interrupt Edge detection is active
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PIO_IT_LOW_LEVEL = Low level interrupt is active
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PIO_IT_HIGH_LEVEL = High level interrupt is active
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PIO_IT_FALL_EDGE = Falling edge interrupt is active
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PIO_IT_RISE_EDGE = Rising edge interrupt is active
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interrupt: the number of the interrupt (int)
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function: the function to call when the interrupt occurs; this function must take no parameters and return nothing. This function is sometimes referred to as an interrupt service routine.
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mode defines when the interrupt should be triggered. Four contstants are predefined as valid values:
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LOW to trigger the interrupt whenever the pin is low,
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CHANGE to trigger the interrupt whenever the pin changes value
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RISING to trigger when the pin goes from low to high,
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FALLING for when the pin goes from high to low.
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*/
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extern void attachInterrupt( uint32_t ulInterrupt, void (*pfn_UserFunc)(void), uint32_t ulMode ) ;
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/*
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Turns off the given interrupt.
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Parameters
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interrupt: the number of interrupt to disable (0 or 1).
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*/
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extern void detachInterrupt( uint32_t ulInterrupt ) ;
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void detachInterrupt(uint32_t interruptNum);
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#ifdef __cplusplus
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}
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@ -47,9 +47,11 @@ enum BitOrder {
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MSBFIRST = 1
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};
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#define CHANGE 1
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#define FALLING 2
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#define RISING 3
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// LOW 0
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// HIGH 1
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#define CHANGE 2
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#define FALLING 3
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#define RISING 4
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#define DEFAULT 1
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#define EXTERNAL 0
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@ -1,280 +0,0 @@
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/* ----------------------------------------------------------------------------
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* SAM Software Package License
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* ----------------------------------------------------------------------------
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* Copyright (c) 2011, 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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/*----------------------------------------------------------------------------
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* Headers
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*----------------------------------------------------------------------------*/
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#include "chip.h"
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#include <assert.h>
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/*----------------------------------------------------------------------------
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* Local definitions
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*----------------------------------------------------------------------------*/
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/* Maximum number of interrupt sources that can be defined. This
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* constant can be increased, but the current value is the smallest possible
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* that will be compatible with all existing projects. */
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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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/**
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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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*/
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typedef struct _InterruptSource
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{
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/* Pointer to the source pin instance. */
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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 _aIntSources[MAX_INTERRUPT_SOURCES] ;
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/* Number of currently defined interrupt sources. */
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static uint32_t _dwNumSources = 0;
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/*----------------------------------------------------------------------------
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* Local Functions
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*----------------------------------------------------------------------------*/
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/**
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* \brief Handles all interrupts on the given PIO controller.
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* \param id PIO controller ID.
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* \param pPio PIO controller base address.
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*/
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extern void PioInterruptHandler( uint32_t id, Pio *pPio )
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{
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uint32_t status;
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uint32_t i;
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/* Read PIO controller status */
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status = pPio->PIO_ISR;
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status &= pPio->PIO_IMR;
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/* Check pending events */
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if ( status != 0 )
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{
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TRACE_DEBUG( "PIO interrupt on PIO controller #%d\n\r", id ) ;
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/* Find triggering source */
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i = 0;
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while ( status != 0 )
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{
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/* There cannot be an unconfigured source enabled. */
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assert(i < _dwNumSources);
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/* Source is configured on the same controller */
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if (_aIntSources[i].pPin->id == id)
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{
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/* Source has PIOs whose statuses have changed */
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if ( (status & _aIntSources[i].pPin->mask) != 0 )
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{
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TRACE_DEBUG( "Interrupt source #%d triggered\n\r", i ) ;
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_aIntSources[i].handler(_aIntSources[i].pPin);
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status &= ~(_aIntSources[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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* Global Functions
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*----------------------------------------------------------------------------*/
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/**
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* \brief Parallel IO Controller A interrupt handler
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* \Redefined PIOA interrupt handler for NVIC interrupt table.
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*/
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extern void PIOA_IrqHandler( void )
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{
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if ( PIOA->PIO_PCISR != 0 )
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{
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PIO_CaptureHandler() ;
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}
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PioInterruptHandler( ID_PIOA, PIOA ) ;
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}
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/**
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* \brief Parallel IO Controller B interrupt handler
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* \Redefined PIOB interrupt handler for NVIC interrupt table.
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*/
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extern void PIOB_IrqHandler( void )
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{
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PioInterruptHandler( ID_PIOB, PIOB ) ;
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}
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/**
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* \brief Parallel IO Controller C interrupt handler
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* \Redefined PIOC interrupt handler for NVIC interrupt table.
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*/
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extern void PIOC_IrqHandler( void )
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{
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PioInterruptHandler( ID_PIOC, PIOC ) ;
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}
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/**
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* \brief Initializes the PIO interrupt management logic
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*
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* The desired priority of PIO interrupts must be provided.
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* Calling this function multiple times result in the reset of currently
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* configured interrupts.
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*
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* \param priority PIO controller interrupts priority.
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*/
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extern void PIO_InitializeInterrupts( uint32_t dwPriority )
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{
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TRACE_DEBUG( "PIO_Initialize()\n\r" ) ;
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/* Reset sources */
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_dwNumSources = 0 ;
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/* Configure PIO interrupt sources */
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TRACE_DEBUG( "PIO_Initialize: Configuring PIOA\n\r" ) ;
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PMC_EnablePeripheral( ID_PIOA ) ;
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PIOA->PIO_ISR ;
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PIOA->PIO_IDR = 0xFFFFFFFF ;
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NVIC_DisableIRQ( PIOA_IRQn ) ;
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NVIC_ClearPendingIRQ( PIOA_IRQn ) ;
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NVIC_SetPriority( PIOA_IRQn, dwPriority ) ;
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NVIC_EnableIRQ( PIOA_IRQn ) ;
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TRACE_DEBUG( "PIO_Initialize: Configuring PIOB\n\r" ) ;
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PMC_EnablePeripheral( ID_PIOB ) ;
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PIOB->PIO_ISR ;
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PIOB->PIO_IDR = 0xFFFFFFFF ;
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NVIC_DisableIRQ( PIOB_IRQn ) ;
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NVIC_ClearPendingIRQ( PIOB_IRQn ) ;
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NVIC_SetPriority( PIOB_IRQn, dwPriority ) ;
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NVIC_EnableIRQ( PIOB_IRQn ) ;
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TRACE_DEBUG( "PIO_Initialize: Configuring PIOC\n\r" ) ;
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PMC_EnablePeripheral( ID_PIOC ) ;
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PIOC->PIO_ISR ;
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PIOC->PIO_IDR = 0xFFFFFFFF ;
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NVIC_DisableIRQ( PIOC_IRQn ) ;
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NVIC_ClearPendingIRQ( PIOC_IRQn ) ;
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NVIC_SetPriority( PIOC_IRQn, dwPriority ) ;
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NVIC_EnableIRQ( PIOC_IRQn ) ;
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}
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/**
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* Configures a PIO or a group of PIO to generate an interrupt on status
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* change. The provided interrupt handler will be called with the triggering
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* pin as its parameter (enabling different pin instances to share the same
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* handler).
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* \param pPin Pointer to a Pin instance.
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* \param handler Interrupt handler function pointer.
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*/
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extern void PIO_ConfigureIt( const Pin *pPin, void (*handler)( const Pin* ) )
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{
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Pio* pio ;
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InterruptSource* pSource ;
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TRACE_DEBUG( "PIO_ConfigureIt()\n\r" ) ;
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assert( pPin ) ;
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pio = pPin->pio ;
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assert( _dwNumSources < MAX_INTERRUPT_SOURCES ) ;
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/* Define new source */
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TRACE_DEBUG( "PIO_ConfigureIt: Defining new source #%d.\n\r", _dwNumSources ) ;
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pSource = &(_aIntSources[_dwNumSources]) ;
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pSource->pPin = pPin ;
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pSource->handler = handler ;
|
||||
_dwNumSources++ ;
|
||||
|
||||
/* PIO3 with additional interrupt support
|
||||
* Configure additional interrupt mode registers */
|
||||
if ( pPin->attribute & PIO_IT_AIME )
|
||||
{
|
||||
// enable additional interrupt mode
|
||||
pio->PIO_AIMER = pPin->mask ;
|
||||
|
||||
// if bit field of selected pin is 1, set as Rising Edge/High level detection event
|
||||
if ( pPin->attribute & PIO_IT_RE_OR_HL )
|
||||
{
|
||||
pio->PIO_REHLSR = pPin->mask ;
|
||||
}
|
||||
else
|
||||
{
|
||||
pio->PIO_FELLSR = pPin->mask;
|
||||
}
|
||||
|
||||
/* if bit field of selected pin is 1, set as edge detection source */
|
||||
if (pPin->attribute & PIO_IT_EDGE)
|
||||
pio->PIO_ESR = pPin->mask;
|
||||
else
|
||||
pio->PIO_LSR = pPin->mask;
|
||||
}
|
||||
else
|
||||
{
|
||||
/* disable additional interrupt mode */
|
||||
pio->PIO_AIMDR = pPin->mask;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Enables the given interrupt source if it has been configured. The status
|
||||
* register of the corresponding PIO controller is cleared prior to enabling
|
||||
* the interrupt.
|
||||
* \param pPin Interrupt source to enable.
|
||||
*/
|
||||
extern void PIO_EnableIt( const Pio* pPio, const uint32_t dwMask )
|
||||
{
|
||||
pPio->PIO_ISR ;
|
||||
pPio->PIO_IER = dwMask ;
|
||||
}
|
||||
|
||||
/**
|
||||
* Disables a given interrupt source, with no added side effects.
|
||||
*
|
||||
* \param pPin Interrupt source to disable.
|
||||
*/
|
||||
extern void PIO_DisableIt( const Pio* pPio, const uint32_t dwMask )
|
||||
{
|
||||
pPio->PIO_IDR = dwMask ;
|
||||
}
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user