usart-wrapper.cpp

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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.
 */
 
#include <cmsis-plus/driver/usart-wrapper.h>
#include <cmsis-plus/diag/trace.h>
#include <Driver_USART.h>
 
#include <utility>
#include <stdio.h>
 
// ----------------------------------------------------------------------------
 
namespace os
{
  namespace driver
  {
    // ------------------------------------------------------------------------
 
    usart_wrapper::usart_wrapper (ARM_DRIVER_USART* driver,
                                  ARM_USART_SignalEvent_t c_cb_func) noexcept
        : driver_ (driver), c_cb_func_ (c_cb_func)
    {
      trace::printf ("%s() %p\n", __func__, this);
    }
 
    usart_wrapper::~usart_wrapper () noexcept
    {
      trace::printf ("%s() %p\n", __func__, this);
 
      driver_ = nullptr;
    }
 
    // ------------------------------------------------------------------------
 
#pragma GCC diagnostic push
#if defined(__clang__)
#elif defined(__GNUC__)
#pragma GCC diagnostic ignored "-Waggregate-return"
#endif
#pragma GCC diagnostic ignored "-Wstrict-aliasing"
 
    const Version&
    usart_wrapper::do_get_version (void) noexcept
    {
      // Overwrite the C++ instance. Assume same layout.
      *(reinterpret_cast<ARM_DRIVER_VERSION*> (&version_))
          = driver_->GetVersion ();
      return version_;
    }
 
    const serial::Capabilities&
    usart_wrapper::do_get_capabilities (void) noexcept
    {
      // Overwrite the C++ instance. Assume same layout.
      *(reinterpret_cast<ARM_USART_CAPABILITIES*> (&capa_))
          = driver_->GetCapabilities ();
      return capa_;
    }
 
    serial::Status&
    usart_wrapper::do_get_status (void) noexcept
    {
      // Overwrite the C++ instance. Assume same layout.
      *(reinterpret_cast<ARM_USART_STATUS*> (&status_))
          = driver_->GetStatus ();
      return status_;
    }
 
    serial::Modem_status&
    usart_wrapper::do_get_modem_status (void) noexcept
    {
      // Overwrite the C++ instance. Assume same layout.
      *(reinterpret_cast<ARM_USART_MODEM_STATUS*> (&modem_status_))
          = driver_->GetModemStatus ();
      return modem_status_;
    }
 
#pragma GCC diagnostic pop
 
    return_t
    usart_wrapper::do_power (Power state) noexcept
    {
      return_t status;
 
      if (state == Power::full)
        {
          status = driver_->Initialize (c_cb_func_);
          if (status != ARM_DRIVER_OK)
            {
              return status;
            }
        }
 
      status = driver_->PowerControl (static_cast<ARM_POWER_STATE> (state));
 
      if (state == Power::off)
        {
          driver_->Uninitialize ();
        }
 
      return status;
    }
 
    return_t
    usart_wrapper::do_send (const void* data, std::size_t num) noexcept
    {
      return driver_->Send (data, static_cast<uint32_t> (num));
    }
 
    return_t
    usart_wrapper::do_receive (void* data, std::size_t num) noexcept
    {
      return driver_->Receive (data, static_cast<uint32_t> (num));
    }
 
    return_t
    usart_wrapper::do_transfer (const void* data_out, void* data_in,
                                std::size_t num) noexcept
    {
      return driver_->Transfer (data_out, data_in,
                                static_cast<uint32_t> (num));
    }
 
    std::size_t
    usart_wrapper::do_get_tx_count (void) noexcept
    {
      return driver_->GetTxCount ();
    }
 
    std::size_t
    usart_wrapper::do_get_rx_count (void) noexcept
    {
      return driver_->GetRxCount ();
    }
 
    return_t
    usart_wrapper::do_configure (serial::config_t cfg,
                                 serial::config_arg_t arg) noexcept
    {
      return driver_->Control (cfg, arg);
    }
 
    return_t
    usart_wrapper::do_control (serial::control_t ctrl) noexcept
    {
      switch (ctrl)
        {
        case serial::Control::disable_tx:
        case serial::Control::disable_rx:
        case serial::Control::disable_break:
          return driver_->Control (
              ctrl
                  - (serial::Control::disable_tx - serial::Control::enable_tx),
              0);
        }
      return driver_->Control (ctrl, 1);
    }
 
    return_t
    usart_wrapper::do_control_modem_line (serial::Modem_control ctrl) noexcept
    {
      return driver_->SetModemControl (
          static_cast<ARM_USART_MODEM_CONTROL> (ctrl));
    }
 
  } /* namespace driver */
} /* namespace os */
 
// ----------------------------------------------------------------------------