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// ----------------------------------------------------------------------------

// SystemC Uart: definition

// This file is part of the cycle accurate model of the OpenRISC 1000 based

// system-on-chip, ORPSoC, built using Verilator.

// This program is free software: you can redistribute it and/or modify it

// under the terms of the GNU Lesser General Public License as published by

// the Free Software Foundation, either version 3 of the License, or (at your

// option) any later version.

// This program 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 Lesser General Public

// License for more details.

// You should have received a copy of the GNU Lesser General Public License

// along with this program.  If not, see <http://www.gnu.org/licenses/>.

// ----------------------------------------------------------------------------

// $Id: $

#ifndef UART_SC__H

#define UART_SC__H

#include "systemc.h"

#include <stdint.h>

//! Handle UART I/O

class UartSC

  : public sc_core::sc_module

{

public:

  // Constructor

  UartSC (sc_core::sc_module_name  name);

  // The ports

  sc_in<bool>   clk;

  sc_in<bool>   uarttx;

  sc_out<bool>   uartrx;

  // Init function

  void initUart (int clk_freq_hz, int uart_baud) ;

  // Transmit (from ORPSoC) handling function

  void checkTx();

private:

  int clocks_per_bit;

  uint8_t current_char;

  int counter;

  int bits_received;

};      // UartSC ()

#endif  // UART_SC__H