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CalM17.cpp
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CalM17.cpp
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/*
* Copyright (C) 2009-2015,2020,2021 by Jonathan Naylor G4KLX
* Copyright (C) 2016 by Colin Durbridge G4EML
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "Config.h"
#if defined(MODE_M17)
#include "Globals.h"
#include "CalM17.h"
#include "M17Defines.h"
const uint8_t PREAMBLE[] = {0x00U,
0x77U, 0x77U, 0x77U, 0x77U, 0x77U, 0x77U, 0x77U, 0x77U,
0x77U, 0x77U, 0x77U, 0x77U, 0x77U, 0x77U, 0x77U, 0x77U,
0x77U, 0x77U, 0x77U, 0x77U, 0x77U, 0x77U, 0x77U, 0x77U,
0x77U, 0x77U, 0x77U, 0x77U, 0x77U, 0x77U, 0x77U, 0x77U,
0x77U, 0x77U, 0x77U, 0x77U, 0x77U, 0x77U, 0x77U, 0x77U,
0x77U, 0x77U, 0x77U, 0x77U, 0x77U, 0x77U, 0x77U, 0x77U};
CCalM17::CCalM17() :
m_transmit(false)
{
}
void CCalM17::process()
{
m17TX.process();
if (!m_transmit)
return;
uint16_t space = m17TX.getSpace();
if (space < 2U)
return;
m17TX.writeData(PREAMBLE, M17_FRAME_LENGTH_BYTES + 1U);
}
uint8_t CCalM17::write(const uint8_t* data, uint16_t length)
{
if (length != 1U)
return 4U;
m_transmit = data[0U] == 1U;
return 0U;
}
#endif