AccessoryModeStartQuery_8cpp

---

title: src/USB/AccessoryModeStartQuery.cpp

---

src/USB/AccessoryModeStartQuery.cpp

Namespaces

Name
aasdk
aasdk::usb

Source code

// This file is part of aasdk library project.
// Copyright (C) 2018 f1x.studio (Michal Szwaj)
// Copyright (C) 2024 CubeOne (Simon Dean - simon.dean@cubeone.co.uk)
// Copyright (C) 2026 OpenCarDev (Matthew Hilton - matthilton2005@gmail.com)
//
// aasdk is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.
//
// aasdk is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with aasdk. If not, see <http://www.gnu.org/licenses/>.

#include <iomanip>
#include <aasdk/Common/Log.hpp>
#include <aasdk/Common/ModernLogger.hpp>
#include <aasdk/USB/AccessoryModeStartQuery.hpp>
#include <aasdk/USB/USBEndpoint.hpp>


namespace aasdk {
  namespace usb {

    AccessoryModeStartQuery::AccessoryModeStartQuery(boost::asio::io_service &ioService, IUSBWrapper &usbWrapper,
                                                     IUSBEndpoint::Pointer usbEndpoint)
        : AccessoryModeQuery(ioService, std::move(usbEndpoint)) {
      data_.resize(8);
      usbWrapper.fillControlSetup(&data_[0], LIBUSB_ENDPOINT_OUT | USB_TYPE_VENDOR, ACC_REQ_START, 0, 0, 0);
      if (aasdk::common::ModernLogger::getInstance().isVerboseUsb()) {
        AASDK_LOG(info) << "[AccessoryModeStartQuery] Prepared START control transfer";
      }
    }

    void AccessoryModeStartQuery::start(Promise::Pointer promise) {
      strand_.dispatch([this, self = this->shared_from_this(), promise = std::move(promise)]() mutable {
        if (promise_ != nullptr) {
          promise->reject(error::Error(error::ErrorCode::OPERATION_IN_PROGRESS));
        } else {
          promise_ = std::move(promise);

          auto usbEndpointPromise = IUSBEndpoint::Promise::defer(strand_);
          usbEndpointPromise->then([this, self = this->shared_from_this()](size_t bytesTransferred) mutable {
                                     promise_->resolve(usbEndpoint_);
                                     promise_.reset();
                                   },
                                   [this, self = this->shared_from_this()](const error::Error &e) mutable {
                                     promise_->reject(e);
                                     promise_.reset();
                                   });

          usbEndpoint_->controlTransfer(common::DataBuffer(data_), cTransferTimeoutMs, std::move(usbEndpointPromise));
        }
      });
    }

  }
}

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Updated on 2026-03-15 at 09:02:41 +0000