// ----------------------------------------------------------------------------
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// ----------------------------------------------------------------------------
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// SystemC Uart: definition
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// SystemC Uart: definition
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// This file is part of the cycle accurate model of the OpenRISC 1000 based
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// This file is part of the cycle accurate model of the OpenRISC 1000 based
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// system-on-chip, ORPSoC, built using Verilator.
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// system-on-chip, ORPSoC, built using Verilator.
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// This program is free software: you can redistribute it and/or modify it
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// This program is free software: you can redistribute it and/or modify it
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// under the terms of the GNU Lesser General Public License as published by
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// under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or (at your
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// the Free Software Foundation, either version 3 of the License, or (at your
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// option) any later version.
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// option) any later version.
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// This program is distributed in the hope that it will be useful, but WITHOUT
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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// FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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// License for more details.
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// License for more details.
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// You should have received a copy of the GNU Lesser General Public License
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// You should have received a copy of the GNU Lesser General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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// ----------------------------------------------------------------------------
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// ----------------------------------------------------------------------------
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// $Id: $
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// $Id: $
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#ifndef UART_SC__H
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#ifndef UART_SC__H
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#define UART_SC__H
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#define UART_SC__H
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#include "systemc.h"
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#include "systemc.h"
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#include <stdint.h>
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#include <stdint.h>
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//! Handle UART I/O
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//! Handle UART I/O
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class UartSC:public sc_core::sc_module {
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class UartSC:public sc_core::sc_module {
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public:
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public:
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// Constructor
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// Constructor
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UartSC(sc_core::sc_module_name name);
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UartSC(sc_core::sc_module_name name);
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// The ports
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// The ports
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sc_in < bool > clk;
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sc_in < bool > clk;
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sc_in < bool > uarttx;
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sc_in < bool > uarttx;
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sc_out < bool > uartrx;
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sc_out < bool > uartrx;
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// Init function
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// Init function
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void initUart(int clk_freq_hz, int uart_baud);
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void initUart(int uart_baud);
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// Transmit (from ORPSoC) handling function
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// Transmit (from ORPSoC) handling function
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void checkTx();
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void checkTx();
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// Receieve (in ORPSoC) generation function
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void driveRx();
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// Check keyboard for entry
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int kbhit();
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// Enable canonical mode on console
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void nonblock(int state);
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private:
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private:
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int clocks_per_bit;
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uint8_t current_char;
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uint8_t current_char;
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int counter;
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int counter;
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int bits_received;
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int bits_received;
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int ns_per_bit;
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int rx_state;
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int rx_counter;
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int rx_bits_sent;
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char rx_char;
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}; // UartSC ()
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}; // UartSC ()
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#endif // UART_SC__H
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#endif // UART_SC__H
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