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mbed SDK library sources

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Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

Import librarymbed

The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

api/DigitalOut.h@37:88e9030f311f, 2013-10-23 (annotated)

Committer:
mbed_official
Date:
Wed Oct 23 15:30:04 2013 +0100
Revision:
37:88e9030f311f
Parent:
13:0645d8841f51 
Synchronized with git revision 5742abe6d9771e0bbfb5477645d7357c7d595702

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 13:0645d8841f51 1 /* mbed Microcontroller Library
bogdanm 13:0645d8841f51 2 * Copyright (c) 2006-2013 ARM Limited
bogdanm 13:0645d8841f51 3 *
bogdanm 13:0645d8841f51 4 * Licensed under the Apache License, Version 2.0 (the "License");
bogdanm 13:0645d8841f51 5 * you may not use this file except in compliance with the License.
bogdanm 13:0645d8841f51 6 * You may obtain a copy of the License at
bogdanm 13:0645d8841f51 7 *
bogdanm 13:0645d8841f51 8 * http://www.apache.org/licenses/LICENSE-2.0
bogdanm 13:0645d8841f51 9 *
bogdanm 13:0645d8841f51 10 * Unless required by applicable law or agreed to in writing, software
bogdanm 13:0645d8841f51 11 * distributed under the License is distributed on an "AS IS" BASIS,
bogdanm 13:0645d8841f51 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
bogdanm 13:0645d8841f51 13 * See the License for the specific language governing permissions and
bogdanm 13:0645d8841f51 14 * limitations under the License.
bogdanm 13:0645d8841f51 15 */
bogdanm 13:0645d8841f51 16 #ifndef MBED_DIGITALOUT_H
bogdanm 13:0645d8841f51 17 #define MBED_DIGITALOUT_H
bogdanm 13:0645d8841f51 18
bogdanm 13:0645d8841f51 19 #include "platform.h"
bogdanm 13:0645d8841f51 20 #include "gpio_api.h"
bogdanm 13:0645d8841f51 21
bogdanm 13:0645d8841f51 22 namespace mbed {
bogdanm 13:0645d8841f51 23
bogdanm 13:0645d8841f51 24 /** A digital output, used for setting the state of a pin
bogdanm 13:0645d8841f51 25 *
bogdanm 13:0645d8841f51 26 * Example:
bogdanm 13:0645d8841f51 27 * @code
bogdanm 13:0645d8841f51 28 * // Toggle a LED
bogdanm 13:0645d8841f51 29 * #include "mbed.h"
bogdanm 13:0645d8841f51 30 *
bogdanm 13:0645d8841f51 31 * DigitalOut led(LED1);
bogdanm 13:0645d8841f51 32 *
bogdanm 13:0645d8841f51 33 * int main() {
bogdanm 13:0645d8841f51 34 * while(1) {
bogdanm 13:0645d8841f51 35 * led = !led;
bogdanm 13:0645d8841f51 36 * wait(0.2);
bogdanm 13:0645d8841f51 37 * }
bogdanm 13:0645d8841f51 38 * }
bogdanm 13:0645d8841f51 39 * @endcode
bogdanm 13:0645d8841f51 40 */
bogdanm 13:0645d8841f51 41 class DigitalOut {
bogdanm 13:0645d8841f51 42
bogdanm 13:0645d8841f51 43 public:
bogdanm 13:0645d8841f51 44 /** Create a DigitalOut connected to the specified pin
bogdanm 13:0645d8841f51 45 *
bogdanm 13:0645d8841f51 46 * @param pin DigitalOut pin to connect to
bogdanm 13:0645d8841f51 47 */
bogdanm 13:0645d8841f51 48 DigitalOut(PinName pin) {
bogdanm 13:0645d8841f51 49 gpio_init(&gpio, pin, PIN_OUTPUT);
bogdanm 13:0645d8841f51 50 }
bogdanm 13:0645d8841f51 51
bogdanm 13:0645d8841f51 52 /** Set the output, specified as 0 or 1 (int)
bogdanm 13:0645d8841f51 53 *
bogdanm 13:0645d8841f51 54 * @param value An integer specifying the pin output value,
bogdanm 13:0645d8841f51 55 * 0 for logical 0, 1 (or any other non-zero value) for logical 1
bogdanm 13:0645d8841f51 56 */
bogdanm 13:0645d8841f51 57 void write(int value) {
bogdanm 13:0645d8841f51 58 gpio_write(&gpio, value);
bogdanm 13:0645d8841f51 59 }
bogdanm 13:0645d8841f51 60
bogdanm 13:0645d8841f51 61 /** Return the output setting, represented as 0 or 1 (int)
bogdanm 13:0645d8841f51 62 *
bogdanm 13:0645d8841f51 63 * @returns
bogdanm 13:0645d8841f51 64 * an integer representing the output setting of the pin,
bogdanm 13:0645d8841f51 65 * 0 for logical 0, 1 for logical 1
bogdanm 13:0645d8841f51 66 */
bogdanm 13:0645d8841f51 67 int read() {
bogdanm 13:0645d8841f51 68 return gpio_read(&gpio);
bogdanm 13:0645d8841f51 69 }
bogdanm 13:0645d8841f51 70
bogdanm 13:0645d8841f51 71 #ifdef MBED_OPERATORS
bogdanm 13:0645d8841f51 72 /** A shorthand for write()
bogdanm 13:0645d8841f51 73 */
bogdanm 13:0645d8841f51 74 DigitalOut& operator= (int value) {
bogdanm 13:0645d8841f51 75 write(value);
bogdanm 13:0645d8841f51 76 return *this;
bogdanm 13:0645d8841f51 77 }
bogdanm 13:0645d8841f51 78
bogdanm 13:0645d8841f51 79 DigitalOut& operator= (DigitalOut& rhs) {
bogdanm 13:0645d8841f51 80 write(rhs.read());
bogdanm 13:0645d8841f51 81 return *this;
bogdanm 13:0645d8841f51 82 }
bogdanm 13:0645d8841f51 83
bogdanm 13:0645d8841f51 84 /** A shorthand for read()
bogdanm 13:0645d8841f51 85 */
bogdanm 13:0645d8841f51 86 operator int() {
bogdanm 13:0645d8841f51 87 return read();
bogdanm 13:0645d8841f51 88 }
bogdanm 13:0645d8841f51 89 #endif
bogdanm 13:0645d8841f51 90
bogdanm 13:0645d8841f51 91 protected:
bogdanm 13:0645d8841f51 92 gpio_t gpio;
bogdanm 13:0645d8841f51 93 };
bogdanm 13:0645d8841f51 94
bogdanm 13:0645d8841f51 95 } // namespace mbed
bogdanm 13:0645d8841f51 96
bogdanm 13:0645d8841f51 97 #endif