A multiple pin digital input. More...

#include <PortIn.h>

Public Member Functions
	PortIn (PortName port, int mask=0xFFFFFFFF)
	Create a PortIn, connected to the specified port.

int	read ()
	Read the value input to the port.

void	mode (PinMode mode)
	Set the input pin mode.

	operator int ()
	A shorthand for read()

Detailed Description

A multiple pin digital input.

Note: Synchronization level: Interrupt safe

Example:

// Turn on an LED if any pins of Port2[0:5] are high
 
#include "mbed.h"
 
PortIn     p(Port2, 0x0000003F);  // Port2 pins [0:5] only
DigitalOut led(LED4);
 
int main() {
    while(1) {
        int pins = p.read();
        if(pins) {
            led = 1;
        } else {
            led = 0;
        }
    }
}

Definition at line 58 of file PortIn.h.

Constructor & Destructor Documentation

◆ PortIn()

PortIn	(	PortName	port,
		int	mask = `0xFFFFFFFF`
	)

Create a PortIn, connected to the specified port.

Parameters

port	Port to connect to (as defined in target's PortNames.h)
mask	Bitmask defines which port pins should be an input (0 - ignore, 1 - include)

Member Function Documentation

◆ read()

int read ( )

Read the value input to the port.

Returns: An integer with each bit corresponding to the associated pin value

Definition at line 73 of file PortIn.h.

◆ mode()

void mode ( PinMode mode )

Set the input pin mode.

Parameters

mode	PullUp, PullDown, PullNone, OpenDrain

◆ operator int()

operator int ( )

A shorthand for read()

Definition at line 86 of file PortIn.h.