Microchip® Advanced Software Framework

pio_handler.c File Reference

Parallel Input/Output (PIO) interrupt handler for SAM.

Copyright (c) 2011-2018 Microchip Technology Inc. and its subsidiaries.

#include "pio.h"
#include "pio_handler.h"

Data Structures

struct  s_interrupt_source
 Describes a PIO interrupt source, including the PIO instance triggering the interrupt and the associated interrupt handler. More...
 

Macros

#define MAX_INTERRUPT_SOURCES   7
 Maximum number of interrupt sources that can be defined. More...
 

Functions

void pio_handler_process (Pio *p_pio, uint32_t ul_id)
 Process an interrupt request on the given PIO controller. More...
 
uint32_t pio_handler_set (Pio *p_pio, uint32_t ul_id, uint32_t ul_mask, uint32_t ul_attr, void(*p_handler)(uint32_t, uint32_t))
 Set an interrupt handler for the provided pins. More...
 
void pio_handler_set_priority (Pio *p_pio, IRQn_Type ul_irqn, uint32_t ul_priority)
 Initialize PIO interrupt management logic. More...
 

Variables

static struct s_interrupt_source gs_interrupt_sources [MAX_INTERRUPT_SOURCES]
 
static uint32_t gs_ul_nb_sources = 0
 

#define MAX_INTERRUPT_SOURCES   7

Maximum number of interrupt sources that can be defined.

This constant can be increased, but the current value is the smallest possible one that will be compatible with all existing projects.

Referenced by pio_handler_process(), and pio_handler_set().

void pio_handler_process ( Pio *  p_pio,
uint32_t  ul_id 
)

Process an interrupt request on the given PIO controller.

Parameters
p_pioPIO controller base address.
ul_idPIO controller ID.

References gs_interrupt_sources, s_interrupt_source::handler, s_interrupt_source::mask, MAX_INTERRUPT_SOURCES, pio_get_interrupt_mask(), and pio_get_interrupt_status().

uint32_t pio_handler_set ( Pio *  p_pio,
uint32_t  ul_id,
uint32_t  ul_mask,
uint32_t  ul_attr,
void(*)(uint32_t, uint32_t)  p_handler 
)

Set an interrupt handler for the provided pins.

The provided handler will be called with the triggering pin as its parameter as soon as an interrupt is detected.

Parameters
p_pioPIO controller base address.
ul_idPIO ID.
ul_maskPins (bit mask) to configure.
ul_attrPins attribute to configure.
p_handlerInterrupt handler function pointer.
Returns
0 if successful, 1 if the maximum number of sources has been defined.

References s_interrupt_source::attr, gs_interrupt_sources, gs_ul_nb_sources, s_interrupt_source::handler, s_interrupt_source::id, s_interrupt_source::mask, MAX_INTERRUPT_SOURCES, and pio_configure_interrupt().

Referenced by ui_init().

void pio_handler_set_priority ( Pio *  p_pio,
IRQn_Type  ul_irqn,
uint32_t  ul_priority 
)

Initialize PIO interrupt management logic.

Parameters
p_pioPIO controller base address.
ul_irqnNVIC line number.
ul_priorityPIO controller interrupts priority.

References pio_disable_interrupt(), pio_enable_interrupt(), pio_get_interrupt_mask(), and pio_get_interrupt_status().

struct s_interrupt_source gs_interrupt_sources[MAX_INTERRUPT_SOURCES]
static
uint32_t gs_ul_nb_sources = 0
static

Referenced by pio_handler_set().