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68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
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/**
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* \file
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*
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* \par Purpose
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*
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* Configuration and handling of interrupts on PIO status changes. The API
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* provided here have several advantages over the traditional PIO interrupt
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* configuration approach:
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* - It is highly portable
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* - It automatically demultiplexes interrupts when multiples pins have been
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* configured on a single PIO controller
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* - It allows a group of pins to share the same interrupt
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*
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* However, it also has several minor drawbacks that may prevent from using it
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* in particular applications:
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* - It enables the clocks of all PIO controllers
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* - PIO controllers all share the same interrupt handler, which does the
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* demultiplexing and can be slower than direct configuration
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* - It reserves space for a fixed number of interrupts, which can be
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* increased by modifying the appropriate constant in pio_it.c.
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*
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* \par Usage
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*
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* -# Initialize the PIO interrupt mechanism using PIO_InitializeInterrupts()
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* with the desired priority (0 ... 7).
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* -# Configure a status change interrupt on one or more pin(s) with
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* PIO_ConfigureIt().
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* -# Enable & disable interrupts on pins using PIO_EnableIt() and
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* PIO_DisableIt().
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*/
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#ifndef _PIO_IT_
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#define _PIO_IT_
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/*
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* Headers
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*/
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#include "pio.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Global functions
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*/
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extern void PIO_InitializeInterrupts( uint32_t dwPriority ) ;
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extern void PIO_ConfigureIt( const Pin *pPin, void (*handler)( const Pin* ) ) ;
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extern void PIO_EnableIt( const Pio* pPio, const uint32_t dwMask ) ;
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extern void PIO_DisableIt( const Pio* pPio, const uint32_t dwMask ) ;
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extern void PIO_IT_InterruptHandler( void ) ;
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extern void PioInterruptHandler( uint32_t id, Pio *pPio ) ;
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extern void PIO_CaptureHandler( void ) ;
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#ifdef __cplusplus
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}
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#endif
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#endif /* #ifndef _PIO_IT_ */
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