uart_apb.h

/*
 * Copyright (C) 2017, 2019, 2023-2024 Kernkonzept GmbH.
 * Author(s): Georg Kotheimer <georg.kotheimer@kernkonzept.com>
 *
 * License: see LICENSE.spdx (in this directory or the directories above)
 */
#pragma once
 
#include "uart_base.h"
 
namespace L4 {

class Uart_apb : public Uart
{
public:
  Uart_apb(unsigned freq) : _freq(freq) {}
  bool startup(Io_register_block const *) override;
  void shutdown() override;
  bool change_mode(Transfer_mode m, Baud_rate r) override;
  int tx_avail() const;
  void wait_tx_done() const;
  inline void out_char(char c) const;
  int write(char const *s, unsigned long count,
            bool blocking = true) const override;
 
  bool enable_rx_irq(bool enable) override;
  int char_avail() const override;
  int get_char(bool blocking = true) const override;
 
private:
  void set_rate(Baud_rate r);
  unsigned _freq;
};
 
} // namespace L4