usart-wrapper.h

Go to the documentation of this file.

/*
 * 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_USART_WRAPPER_H_
#define CMSIS_PLUS_DRIVER_USART_WRAPPER_H_
 
#include <cmsis-plus/driver/serial.h>
 
// ----------------------------------------------------------------------------
 
#pragma GCC diagnostic push
#if defined(__clang__)
#pragma clang diagnostic ignored "-Wc++98-compat"
#endif
 
// ----------------------------------------------------------------------------
 
extern "C"
{
  // Avoid to include <Driver_USART.h>
  typedef void (*ARM_USART_SignalEvent_t) (uint32_t event);
 
  typedef struct _ARM_DRIVER_USART const ARM_DRIVER_USART;
}
 
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 USART Keil driver behave like a
    // µOS++ Serial driver.
 
    class usart_wrapper : public Serial
    {
    public:
      // ----------------------------------------------------------------------
 
      usart_wrapper (ARM_DRIVER_USART* driver,
                     ARM_USART_SignalEvent_t c_cb_func) noexcept;
 
      usart_wrapper (const usart_wrapper&) = delete;
 
      usart_wrapper (usart_wrapper&&) = delete;
 
      usart_wrapper&
      operator= (const usart_wrapper&)
          = delete;
 
      usart_wrapper&
      operator= (usart_wrapper&&)
          = delete;
 
      virtual ~usart_wrapper () noexcept override;
 
      // ----------------------------------------------------------------------
 
    protected:
      virtual const Version&
      do_get_version (void) noexcept override;
 
      virtual const serial::Capabilities&
      do_get_capabilities (void) noexcept override;
 
      virtual return_t
      do_power (Power state) noexcept override;
 
      virtual return_t
      do_send (const void* data, std::size_t num) noexcept override;
 
      virtual return_t
      do_receive (void* data, std::size_t num) noexcept override;
 
      virtual return_t
      do_transfer (const void* data_out, void* data_in,
                   std::size_t num) noexcept override;
 
      virtual std::size_t
      do_get_tx_count (void) noexcept override;
 
      virtual std::size_t
      do_get_rx_count (void) noexcept override;
 
      virtual return_t
      do_configure (serial::config_t ctrl,
                    serial::config_arg_t arg) noexcept override;
 
      virtual return_t
      do_control (serial::control_t ctrl) noexcept override;
 
      virtual serial::Status&
      do_get_status (void) noexcept override;
 
      virtual return_t
      do_control_modem_line (serial::Modem_control ctrl) noexcept override;
 
      virtual serial::Modem_status&
      do_get_modem_status (void) noexcept override;
 
      // ----------------------------------------------------------------------
 
    private:
      ARM_DRIVER_USART* driver_;
 
      ARM_USART_SignalEvent_t c_cb_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 };
      serial::Capabilities capa_;
      // serial::Status status_;
      // serial::Modem_status modem_status_;
    };
 
#pragma GCC diagnostic pop
 
  } /* namespace driver */
} /* namespace os */
 
#pragma GCC diagnostic pop
 
// ----------------------------------------------------------------------------
 
#endif /* CMSIS_PLUS_DRIVER_USART_WRAPPER_H_ */