| // Copyright 2023 The Pigweed Authors |
| // |
| // 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 |
| // |
| // https://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. |
| #pragma once |
| |
| namespace pw::digital_io { |
| |
| // The mapping of a logical state to a physical state of a digital line. |
| enum class Polarity { |
| kActiveHigh, // Active means high, inactive means low |
| kActiveLow, // Active means low, inactive means high |
| }; |
| |
| } // namespace pw::digital_io |
