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DigitalOut

Use the DigitalOut interface to configure and control a digital output pin by setting the pin to logic level 0 or 1.

DigitalOut class reference

Public Member Functions
 DigitalOut (PinName pin)
 Create a DigitalOut connected to the specified pin. More...
 DigitalOut (PinName pin, int value)
 Create a DigitalOut connected to the specified pin. More...
void write (int value)
 Set the output, specified as 0 or 1 (int) More...
int read ()
 Return the output setting, represented as 0 or 1 (int) More...
int is_connected ()
 Return the output setting, represented as 0 or 1 (int) More...
DigitalOutoperator= (int value)
 A shorthand for write() More...
DigitalOutoperator= (DigitalOut &rhs)
 A shorthand for write() using the assignment operator which copies the state from the DigitalOut argument. More...
 operator int ()
 A shorthand for read() More...

DigitalOut hello, world

/*
 * Copyright (c) 2006-2020 Arm Limited and affiliates.
 * SPDX-License-Identifier: Apache-2.0
 */

#include "mbed.h"

DigitalOut myled(LED1);

int main()
{
    // check that myled object is initialized and connected to a pin
    if (myled.is_connected()) {
        printf("myled is initialized and connected!\n\r");
    }

    // Blink LED
    while (1) {
        myled = 1;          // set LED1 pin to high
        printf("myled = %d \n\r", (uint8_t)myled);
        ThisThread::sleep_for(500);

        myled.write(0);     // set LED1 pin to low
        printf("myled = %d \n\r", myled.read());
        ThisThread::sleep_for(500);
    }
}

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