86 lines
1.9 KiB
C++
86 lines
1.9 KiB
C++
/*
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* Copyright (C) 2015 by Jonathan Naylor G4KLX
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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., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "YSFEcho.h"
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#include "YSFDefines.h"
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CYSFEcho::CYSFEcho(unsigned int delay, unsigned int space) :
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m_buffer(space),
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m_timer(1000U, delay)
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{
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}
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CYSFEcho::~CYSFEcho()
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{
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}
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unsigned int CYSFEcho::readData(unsigned char* data)
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{
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if (!hasData())
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return 0U;
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unsigned char len;
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m_buffer.getData(&len, 1U);
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m_buffer.getData(data, len);
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// If the FICH is valid, regenerate the sync
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if ((data[1U] & 0x01U) == 0x01U) {
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data[2U] = YSF_SYNC_BYTES[0U];
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data[3U] = YSF_SYNC_BYTES[1U];
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data[4U] = YSF_SYNC_BYTES[2U];
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data[5U] = YSF_SYNC_BYTES[3U];
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data[6U] = YSF_SYNC_BYTES[4U];
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}
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if (!hasData())
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m_timer.stop();
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return len;
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}
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bool CYSFEcho::writeData(const unsigned char* data, unsigned int length)
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{
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bool ret = m_buffer.hasSpace(length + 1U);
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if (!ret)
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return false;
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unsigned char len = length;
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m_buffer.addData(&len, 1U);
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m_buffer.addData(data, length);
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m_timer.start();
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return true;
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}
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bool CYSFEcho::hasData()
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{
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if (m_timer.isRunning() && m_timer.hasExpired())
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return m_buffer.hasData();
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else
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return false;
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}
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void CYSFEcho::clock(unsigned int ms)
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{
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m_timer.clock(ms);
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}
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