77 lines
1.8 KiB
Plaintext
77 lines
1.8 KiB
Plaintext
/*
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* This file is part of libsidplayfp, a SID player engine.
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*
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* Copyright 2011-2015 Leandro Nini <drfiemost@users.sourceforge.net>
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* Copyright 2009-2014 VICE Project
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* Copyright 2007-2010 Antti Lankila
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* Copyright 2000 Simon White
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef SERIALPORT_H
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#define SERIALPORT_H
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#include "interrupt.h"
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namespace libsidplayfp
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{
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class SerialPort
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{
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private:
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InterruptSource *interruptSource;
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int count;
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bool buffered;
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uint8_t out;
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public:
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explicit SerialPort(InterruptSource *intSource) :
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interruptSource(intSource)
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{}
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void reset()
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{
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out = 0;
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count = 0;
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buffered = false;
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}
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void setBuffered() { buffered = true; }
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void handle(uint8_t serialDataReg)
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{
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if (count && --count == 0)
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{
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interruptSource->trigger(InterruptSource::INTERRUPT_SP);
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}
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if (count == 0 && buffered)
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{
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out = serialDataReg;
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buffered = false;
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count = 16;
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// Output rate 8 bits at ta / 2
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}
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}
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};
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}
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#endif // SERIALPORT_H
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