pw_digital_io_zephyr/digital_io.cc

// Copyright 2025 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.

#include "pw_digital_io_zephyr/digital_io.h"

#include <zephyr/sys/util.h>

#include "lib/stdcompat/bit.h"

extern "C" void pw_digital_io_ZephyrCallbackHandler(const struct device* dev,
                                                    struct gpio_callback* cb,
                                                    uint32_t pin_mask) {
  PW_ASSERT(cpp20::has_single_bit(pin_mask));
  auto owner =
      CONTAINER_OF(cb, pw::digital_io::gpio_callback_and_handler, data);

  if (owner->handler == nullptr) {
    return;
  }
  owner->handler(gpio_pin_get(dev, cpp20::countr_zero(pin_mask)) == 0
                     ? pw::digital_io::State::kInactive
                     : pw::digital_io::State::kActive);
}