CalRSSI.cpp

/*
 *   Copyright (C) 2016 by Jonathan Naylor G4KLX
 *
 *   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"
#include "Globals.h"
#include "CalRSSI.h"
#include "Utils.h"

CCalRSSI::CCalRSSI() :
m_count(0U),
m_accum(0U),
m_min(0xFFFFU),
m_max(0x0000U)
{
}

void CCalRSSI::samples(const uint16_t* rssi, uint8_t length)
{
  for (uint16_t i = 0U; i < length; i++) {
    uint16_t ss = rssi[i];

    m_accum += ss;

    if (ss > m_max)
      m_max = ss;
    if (ss < m_min)
      m_min = ss;

    m_count++;
    if (m_count >= 24000U) {
      uint16_t ave = m_accum / m_count;

      uint8_t buffer[6U];
      buffer[0U] = (m_max >> 8) & 0xFFU;
      buffer[1U] = (m_max >> 0) & 0xFFU;
      buffer[2U] = (m_min >> 8) & 0xFFU;
      buffer[3U] = (m_min >> 0) & 0xFFU;
      buffer[4U] = (ave >> 8) & 0xFFU;
      buffer[5U] = (ave >> 0) & 0xFFU;

      serial.writeRSSIData(buffer, 6U);

      m_count = 0U;
      m_accum = 0U;
      m_min   = 0xFFFFU;
      m_max   = 0x0000U;
    }
  }
}