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... | |
| DigitalOut & | operator= (int value) |
| A shorthand for write() More... | |
| DigitalOut & | operator= (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
/* mbed Example Program
* Copyright (c) 2006-2014 ARM Limited
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#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 );
wait(0.5);
myled.write(0); // set LED1 pin to low
printf("myled = %d \n\r",myled.read() );
wait(0.5);
}
}