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InterruptIn Class Reference
Public Member Functions | Private Member Functions

InterruptIn Class Reference
[Drivers]

A digital interrupt input, used to call a function on a rising or falling edge. More...

#include <InterruptIn.h>

Inherits NonCopyable< InterruptIn >.

Public Member Functions

 InterruptIn (PinName pin)
 Create an InterruptIn connected to the specified pin.
 InterruptIn (PinName pin, PinMode mode)
 Create an InterruptIn connected to the specified pin, and the pin configured to the specified mode.
int read ()
 Read the input, represented as 0 or 1 (int)
 operator int ()
 An operator shorthand for read()
void rise (Callback< void()> func)
 Attach a function to call when a rising edge occurs on the input.
template<typename T , typename M >
 MBED_DEPRECATED_SINCE ("mbed-os-5.1","The rise function does not support cv-qualifiers. Replaced by ""rise(callback(obj, method)).") void rise(T *obj
 Attach a member function to call when a rising edge occurs on the input.
template<typename T , typename M >
 MBED_DEPRECATED_SINCE ("mbed-os-5.1","The fall function does not support cv-qualifiers. Replaced by ""fall(callback(obj, method)).") void fall(T *obj
 Attach a member function to call when a falling edge occurs on the input.
void enable_irq ()
 Enable IRQ.
void disable_irq ()
 Disable IRQ.

Private Member Functions

 MBED_DEPRECATED ("Invalid copy construction of a NonCopyable resource.") NonCopyable(const NonCopyable &)
 NonCopyable copy constructor.
 MBED_DEPRECATED ("Invalid copy assignment of a NonCopyable resource.") NonCopyable &operator
 NonCopyable copy assignment operator.

Detailed Description

A digital interrupt input, used to call a function on a rising or falling edge.

Note:
Synchronization level: Interrupt safe

Example: 

 // Flash an LED while waiting for events

 #include "mbed.h"

 InterruptIn event(p16);
 DigitalOut led(LED1);

 void trigger() {
     printf("triggered!\n");
 }

 int main() {
     // register trigger() to be called upon the rising edge of event
     event.rise(&trigger);
     while(1) {
         led = !led;
         wait(0.25);
     }
 }

Definition at line 61 of file InterruptIn.h.

Constructor & Destructor Documentation

InterruptIn ( PinName  pin )

Create an InterruptIn connected to the specified pin.

Parameters:
pinInterruptIn pin to connect to
InterruptIn ( PinName  pin,
PinMode  mode 
)

Create an InterruptIn connected to the specified pin, and the pin configured to the specified mode.

Parameters:
pinInterruptIn pin to connect to
modeDesired Pin mode configuration. (Valid values could be PullNone, PullDown, PullUp and PullDefault. See PinNames.h for your target for definitions)

Member Function Documentation

void disable_irq (  )

Disable IRQ.

This method depends on hardware implementation, might disable one port interrupts. For further information, check gpio_irq_disable().

void enable_irq (  )

Enable IRQ.

This method depends on hardware implementation, might enable one port interrupts. For further information, check gpio_irq_enable().

MBED_DEPRECATED_SINCE ( "mbed-os-5.1"  ,
"The fall function does not support cv-qualifiers. Replaced by ""fall(callback(obj, method))."   
)

Attach a member function to call when a falling edge occurs on the input.

Parameters:
objpointer to the object to call the member function on
methodpointer to the member function to be called
MBED_DEPRECATED_SINCE ( "mbed-os-5.1"  ,
"The rise function does not support cv-qualifiers. Replaced by ""rise(callback(obj, method))."   
)

Attach a member function to call when a rising edge occurs on the input.

Parameters:
objpointer to the object to call the member function on
methodpointer to the member function to be called
operator int (  )

An operator shorthand for read()

int read (  )

Read the input, represented as 0 or 1 (int)

Returns:
An integer representing the state of the input pin, 0 for logical 0, 1 for logical 1
void rise ( Callback< void()>  func )

Attach a function to call when a rising edge occurs on the input.

Parameters:
funcA pointer to a void function, or 0 to set as none
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