Mbed OS Reference | InterfaceDigitalInOut.h Source File

 /*
  * Mbed-OS Microcontroller Library
  * Copyright (c) 2021 Embedded Planet
  * Copyright (c) 2021 ARM Limited
  * SPDX-License-Identifier: Apache-2.0
  *
  * 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
  */
 
 #ifndef MBED_INTERFACE_DIGITALINOUT_H_
 #define MBED_INTERFACE_DIGITALINOUT_H_
 
 #include "PinNames.h"
 
 namespace mbed {
 
 class DigitalInOut;
 
 namespace interface {
 
 #ifdef FEATURE_EXPERIMENTAL_API
 
 // TODO - move method doxygen comments to interface once this polymorphism is mainstream
 
 // Pure interface definition for DigitalInOut
 struct DigitalInOut {
     virtual ~DigitalInOut() = default;
     virtual void write(int value) = 0;
     virtual int read() = 0;
     virtual void output() = 0;
     virtual void input() = 0;
     virtual void mode(PinMode pull) = 0;
     virtual int is_connected() = 0;
 
     DigitalInOut &operator= (int value)
     {
         // Underlying implementation is responsible for thread-safety
         write(value);
         return *this;
     }
 
     DigitalInOut &operator= (DigitalInOut &rhs)
     {
         // Underlying implementation is responsible for thread-safety
         write(rhs.read());
         return *this;
     }
 
     operator int()
     {
         // Underlying implementation is responsible for thread-safety
         return read();
     }
 
 };
 #else
 using DigitalInOut = ::mbed::DigitalInOut;
 #endif /* FEATURE_EXPERIMENTAL_API */
 
 } // namespace interface
 } // namespace mbed
 
 #endif /* MBED_INTERFACE_DIGITALINOUT_H_ */
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