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PortIn Class Reference
Public Member Functions

PortIn Class Reference

A multiple pin digital input. More...

#include <PortIn.h>

Public Member Functions

 PortIn (PortName port, int mask=0xFFFFFFFF)
 Create an PortIn, connected to the specified port.
int read ()
 Read the value currently output on the port.
void mode (PinMode mode)
 Set the input pin mode.
 operator int ()
 A shorthand for read()

Detailed Description

A multiple pin digital input.

Example: 

 // Switch on an LED if any of mbed pins 21-26 is high

 #include "mbed.h"

 PortIn     p(Port2, 0x0000003F);   // p21-p26
 DigitalOut ind(LED4);

 int main() {
     while(1) {
         int pins = p.read();
         if(pins) {
             ind = 1;
         } else {
             ind = 0;
         }
     }
 }

Definition at line 40 of file PortIn.h.

Constructor & Destructor Documentation

PortIn ( PortName  port,
int  mask = 0xFFFFFFFF 
)

Create an PortIn, connected to the specified port.

Parameters:
portPort to connect to (Port0-Port5)
maskA bitmask to identify which bits in the port should be included (0 - ignore)

Member Function Documentation

void mode ( PinMode  mode )

Set the input pin mode.

Parameters:
modePullUp, PullDown, PullNone, OpenDrain
operator int (  )

A shorthand for read()

Definition at line 65 of file PortIn.h.

int read (  )

Read the value currently output on the port.

Returns:
An integer with each bit corresponding to associated port pin setting
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