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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 uart_baud);

        // Transmit (from ORPSoC) handling function

        void checkTx();

        // Receieve (in ORPSoC) generation function

        void driveRx();

        // Check keyboard for entry

        int kbhit();

        // Enable canonical mode on console

        void nonblock(int state);

private:

        uint8_t current_char;

        int counter;

        int bits_received;

        int ns_per_bit;

        int rx_state;

        int rx_counter;

        int rx_bits_sent;

        char rx_char;

};                              // UartSC ()

#endif // UART_SC__H