usbd-wrapper.h

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/*
 * This file is part of the µOS++ project (https://micro-os-plus.github.io/).
 * Copyright (c) 2016-2025 Liviu Ionescu. All rights reserved.
 *
 * Permission to use, copy, modify, and/or distribute this software
 * for any purpose is hereby granted, under the terms of the MIT license.
 *
 * If a copy of the license was not distributed with this file, it can
 * be obtained from https://opensource.org/licenses/mit.
 */
 
#ifndef CMSIS_PLUS_DRIVER_USBD_WRAPPER_H_
#define CMSIS_PLUS_DRIVER_USBD_WRAPPER_H_
 
#include <cmsis-plus/driver/usb-device.h>
 
// ----------------------------------------------------------------------------
 
extern "C"
{
  // Avoid to include <Driver_USBD.h>
  typedef void (*ARM_USBD_SignalDeviceEvent_t) (
      uint32_t event); 
  typedef void (*ARM_USBD_SignalEndpointEvent_t) (
      uint8_t ep_addr,
      uint32_t event); 
  typedef struct _ARM_DRIVER_USBD const ARM_DRIVER_USBD;
}
 
namespace os
{
  namespace driver
  {
    // ========================================================================
 
#pragma GCC diagnostic push
#if defined(__clang__)
#pragma clang diagnostic ignored "-Wpadded"
#elif defined(__GNUC__)
#pragma GCC diagnostic ignored "-Wpadded"
#endif
 
    // This wrapper makes a CMSIS USBD Keil driver behave like a
    // µOS++ Serial driver.
 
    class usbd_wrapper : public usb::Device
    {
    public:
      // ----------------------------------------------------------------------
 
      usbd_wrapper (
          ARM_DRIVER_USBD* driver,
          ARM_USBD_SignalDeviceEvent_t c_cb_device_func,
          ARM_USBD_SignalEndpointEvent_t c_cb_endpoint_func) noexcept;
 
      usbd_wrapper (const usbd_wrapper&) = delete;
 
      usbd_wrapper (usbd_wrapper&&) = delete;
 
      usbd_wrapper&
      operator= (const usbd_wrapper&)
          = delete;
 
      usbd_wrapper&
      operator= (usbd_wrapper&&)
          = delete;
 
      virtual ~usbd_wrapper () noexcept;
 
      // ----------------------------------------------------------------------
 
    protected:
      virtual const Version&
      do_get_version (void) noexcept override;
 
      const usb::device::Capabilities&
      do_get_capabilities (void) noexcept override;
 
      virtual return_t
      do_power (Power state) noexcept override;
 
      virtual return_t
      do_connect (void) noexcept override;
 
      virtual return_t
      do_disconnect (void) noexcept override;
 
      virtual usb::device::Status&
      do_get_status (void) noexcept override;
 
      virtual return_t
      do_wakeup_remote (void) noexcept override;
 
      virtual return_t
      do_configure_address (usb::device_address_t dev_addr) noexcept override;
 
      virtual return_t
      do_read_setup_packet (uint8_t* buf) noexcept override;
 
      virtual usb::frame_number_t
      do_get_frame_number (void) noexcept override;
 
      virtual return_t
      do_configure_endpoint (
          usb::endpoint_t ep_addr, usb::Endpoint_type ep_type,
          usb::packet_size_t ep_max_packet_size) noexcept override;
 
      virtual return_t
      do_unconfigure_endpoint (usb::endpoint_t ep_addr) noexcept override;
 
      virtual return_t
      do_stall_endpoint (usb::endpoint_t ep_addr,
                         bool stall) noexcept override;
 
      virtual return_t
      do_transfer (usb::endpoint_t ep_addr, uint8_t* data,
                   std::size_t num) noexcept override;
 
      virtual std::size_t
      do_get_transfer_count (usb::endpoint_t ep_addr) noexcept override;
 
      virtual return_t
      do_abort_transfer (usb::endpoint_t ep_addr) noexcept override;
 
      // ----------------------------------------------------------------------
 
    private:
      ARM_DRIVER_USBD* driver_;
 
      ARM_USBD_SignalDeviceEvent_t c_cb_device_func_;
      ARM_USBD_SignalEndpointEvent_t c_cb_endpoint_func_;
 
      // Attempts to somehow use && failed, since the Keil driver
      // functions return temporary objects. So the only portable
      // solution was to copy these objects here and return
      // references to these objects.
      // (Not particularly proud of this solution, but could not find
      // a better one.)
 
      Version version_{ 0, 0 };
      usb::device::Capabilities capa_;
      usb::device::Status status_;
    };
 
#pragma GCC diagnostic pop
 
  } /* namespace driver */
} /* namespace os */
 
// ----------------------------------------------------------------------------
 
#endif /* CMSIS_PLUS_DRIVER_USBD_WRAPPER_H_ */