/* * 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; virtual DigitalInOut &operator= (int value) { // Underlying implementation is responsible for thread-safety write(value); return *this; } virtual DigitalInOut &operator= (DigitalInOut &rhs) { // Underlying implementation is responsible for thread-safety write(rhs.read()); return *this; } virtual 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_ */