File content as of revision 44:ece6330e9b57:

/*
 * CommProtocolPeerBrute.cpp
 *
 *  Created on: Jan 30, 2017
 *      Author: mbriggs
 */

#include "CommProtocolPeerBrute.h"
#include "MTSLog.h"
#include "dot_util.h"

// wireless bridge protocol
const uint8_t TX_PWR = 20; // 20 dBm
const float RX_SLEEP_TIME = 2000; // ms (one second resolution, min 2 seconds)
const uint8_t TX_TIME = 30; // in ms
const unsigned int nTimesToTx = ceil(RX_SLEEP_TIME / ((float)TX_TIME));
//const uint8_t maxPayloadSize = 10; // Number of bytes (used for toa calcultion)

CommProtocolPeerBrute::CommProtocolPeerBrute()
{
    logInfo("RX_SLEEP_TIME %f, timeOnAir %lu, nTimesToTx %lu", RX_SLEEP_TIME, TX_TIME, nTimesToTx);

    mIsTx = true; // default to TX
    dot = mDot::getInstance();
}

CmdResult CommProtocolPeerBrute::init()
{
    // Common Configuration
    dot->setAesEncryption(true);  // Enable encryption
    dot->setTxWait(false);
    dot->setAck(0);  // Disable Ack
    dot->setClass("C"); // Set class C
    dot->setTxPower(TX_PWR);

    // TODO break out in a utility function
    // update configuration if necessary
    logInfo("Setting up peer to peer configuration");
    if (dot->getJoinMode() != mDot::PEER_TO_PEER) {
        logInfo("changing network join mode to PEER_TO_PEER");
        if (dot->setJoinMode(mDot::PEER_TO_PEER) != mDot::MDOT_OK) {
            logError("failed to set network join mode to PEER_TO_PEER");
        }
    }
    uint8_t tx_power;
    uint8_t tx_datarate;
    uint32_t tx_frequency;
    uint8_t frequency_band = dot->getFrequencyBand();
    switch (frequency_band) {
        case mDot::FB_EU868:
            // 250kHz channels achieve higher throughput
            // DR6 : SF7 @ 250kHz
            // DR0 - DR5 (125kHz channels) available but much slower
            tx_frequency = 869850000;
            tx_datarate = mDot::DR6;
            // the 869850000 frequency is 100% duty cycle if the total power is under 7 dBm - tx power 4 + antenna gain 3 = 7
            tx_power = 4;
            break;
        case mDot::FB_US915:
        case mDot::FB_AU915:
        default:
            // 500kHz channels achieve highest throughput
            // DR8 : SF12 @ 500kHz
            // DR9 : SF11 @ 500kHz
            // DR10 : SF10 @ 500kHz
            // DR11 : SF9 @ 500kHz
            // DR12 : SF8 @ 500kHz
            // DR13 : SF7 @ 500kHz
            // DR0 - DR3 (125kHz channels) available but much slower
            tx_frequency = 915500000;
            tx_datarate = mDot::DR13;
            // 915 bands have no duty cycle restrictions, set tx power to max
            tx_power = 20;
            break;
    }
    // in PEER_TO_PEER mode there is no join request/response transaction
    // as long as both Dots are configured correctly, they should be able to communicate

    // FIXME just using pairing keys for now
    update_peer_to_peer_config(pair_network_address, pair_network_session_key, pair_data_session_key, tx_frequency, tx_datarate, tx_power);
    return cmdSuccess;
}
void CommProtocolPeerBrute::setTx(bool isTx)
{
    mIsTx = isTx;
}
bool CommProtocolPeerBrute::isTx()
{
    return mIsTx;
}
CmdResult CommProtocolPeerBrute::clearPair()
{
    logError("Not implemented yet!!!");
    return cmdError;
}

// TX focused
CmdResult CommProtocolPeerBrute::send (const std::vector<uint8_t> &msg)
{
    if (!dot->getNetworkJoinStatus()) {
        join_network();
    }
    logInfo("Starting TX.  Time: %lu", us_ticker_read());
    for(uint i=0;i<nTimesToTx;++i) {
        dot->send(msg);
    }
    logInfo("Finished TX.  Time: %lu", us_ticker_read());
    return cmdError;
}

CmdResult CommProtocolPeerBrute::sendPairReq()
{
    if (!dot->getNetworkJoinStatus()) {
        join_network();
    }
    logError("Not implemented yet!!!");
    return cmdError;
}

// RX focused
CmdResult CommProtocolPeerBrute::listen (bool &msgPending)
{
    if (!dot->getNetworkJoinStatus()) {
        join_network();
    }

    uint32_t cDwnLink = dot->getDownLinkCounter();

    wait(TX_TIME/1000.0); // Wait TX_TIME

    if (cDwnLink < dot->getDownLinkCounter()) {
        msgPending = true;
    }
    else {
        msgPending = false;
    }
    return cmdSuccess;  // Maybe add timeout as a possible return value
}

CmdResult CommProtocolPeerBrute::recv (std::vector<uint8_t> &msg)
{
    dot->recv(msg);
    return cmdSuccess;
}

CmdResult CommProtocolPeerBrute::waitForPairing(float waitTime)
{
    logError("Not implemented yet!!!");
    return cmdError;
}

CmdResult CommProtocolPeerBrute::sendPairAccepted()
{
    logError("Not implemented yet!!!");
    return cmdError;
}

// xDot Peer to Peer Specific
uint32_t CommProtocolPeerBrute::getDLC()
{
    return dot->getDownLinkCounter();
}

uint32_t CommProtocolPeerBrute::getULC()
{
    return dot->getUpLinkCounter();
}

// private:

CmdResult CommProtocolPeerBrute::readInfoFromNVM()
{
    logError("Not implemented yet!!!");
    return cmdError;
}

CmdResult CommProtocolPeerBrute::writeInfoToNVM()
{
    logError("Not implemented yet!!!");
    return cmdError;
}

CmdResult CommProtocolPeerBrute::resetCounters()
{
    dot->setDownLinkCounter(0);
    dot->setUpLinkCounter(0);
    return cmdSuccess;
}

CmdResult CommProtocolPeerBrute::genEncypKeys()
{
    logError("Not implemented yet!!!");
    return cmdError;
}