File content as of revision 26:9411b26a5084:

#include "config.h"
#include "dot_util.h"
#include "RadioEvent.h"
#include <math.h>


/////////////////////////////////////////////////////////////////////////////
// -------------------- DOT LIBRARY REQUIRED ------------------------------//
// * Because these example programs can be used for both mDot and xDot     //
//     devices, the LoRa stack is not included. The libmDot library should //
//     be imported if building for mDot devices. The libxDot library       //
//     should be imported if building for xDot devices.                    //
// * https://developer.mbed.org/teams/MultiTech/code/libmDot-dev-mbed5/    //
// * https://developer.mbed.org/teams/MultiTech/code/libmDot-mbed5/        //
// * https://developer.mbed.org/teams/MultiTech/code/libxDot-dev-mbed5/    //
// * https://developer.mbed.org/teams/MultiTech/code/libxDot-mbed5/        //
/////////////////////////////////////////////////////////////////////////////

/////////////////////////////////////////////////////////////
// * these options must match between the two devices in   //
//   order for communication to be successful
/////////////////////////////////////////////////////////////
static uint8_t network_address[] = { 0x01, 0x02, 0x03, 0x04 };
static uint8_t network_session_key[] = { 0x01, 0x02, 0x03, 0x04, 0x01, 0x02, 0x03, 0x04, 0x01, 0x02, 0x03, 0x04, 0x01, 0x02, 0x03, 0x04 };
static uint8_t data_session_key[] =    { 0x01, 0x02, 0x03, 0x04, 0x01, 0x02, 0x03, 0x04, 0x01, 0x02, 0x03, 0x04, 0x01, 0x02, 0x03, 0x04 };

// wireless bridge protocol
//const float dutyCycle = 0.01; // 1%
const float rxSleepTime = 2000; // ms
const uint8_t maxPayloadSize = 10; // Number of bytes (used for toa calcultion)

DigitalOut led1(LED1);
mDot* dot = NULL;

Serial pc(USBTX, USBRX);

int main() {
    // Custom event handler for automatically displaying RX data
    RadioEvent events;
    uint32_t tx_frequency;
    uint8_t tx_datarate;
    uint8_t tx_power;
    uint8_t frequency_band;

    pc.baud(115200);

    mts::MTSLog::setLogLevel(mts::MTSLog::WARNING_LEVEL);
    
    dot = mDot::getInstance();

    logInfo("mbed-os library version: %d", MBED_LIBRARY_VERSION);

    // start from a well-known state
    logInfo("defaulting Dot configuration");
    dot->resetConfig();

    // make sure library logging is turned on
    dot->setLogLevel(mts::MTSLog::WARNING_LEVEL);

    // attach the custom events handler
    dot->setEvents(&events);

    // update configuration if necessary
    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");
        }
    }
    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
    update_peer_to_peer_config(network_address, network_session_key, data_session_key, tx_frequency, tx_datarate, tx_power);


    unsigned int wakeMode;

    ///////////////////////////////
	// Transmitter Configuration //
	///////////////////////////////
	#if BRIDGE_TX
    wakeMode = mDot::INTERRUPT;
	#endif

	////////////////////////////
	// Receiver Configuration //
	////////////////////////////
	#if BRIDGE_RX
    wakeMode = mDot::RTC_ALARM_OR_INTERRUPT;
	#endif

    // Common Configuration
    dot->setWakePin(WAKE); // Use the wake pin as sleep interrupt
    dot->setClass("C"); // Set class C
    dot->setAck(0);  // Disable Ack

    // save changes to configuration
    logInfo("saving configuration");
    if (!dot->saveConfig()) {
        logError("failed to save configuration");
    }

    // display configuration
    display_config();


    uint32_t timeOnAir = dot->getTimeOnAir(maxPayloadSize);
    unsigned int nTimesToTx = ceil(rxSleepTime / ((float)timeOnAir));
    logInfo("rxSleepTime %f, timeOnAir %f, nTimesToTx %d", rxSleepTime, (float) timeOnAir, nTimesToTx);

    uint16_t seqNum=0;
    uint32_t cDwnLink = dot->getDownLinkCounter();
    while (true) {
        std::vector<uint8_t> data;
        led1=0;
    	///////////////////////////
    	// Transmitter main loop //
    	///////////////////////////
		#if BRIDGE_TX

        // join network if not joined
        if (!dot->getNetworkJoinStatus()) {
            join_network();
        }

		logError("Time: %lu", us_ticker_read());
        led1=1;
        data.push_back((seqNum >> 8) & 0xFF);
        data.push_back(seqNum & 0xFF);
        logInfo("seqNum: %lu", seqNum);
        for(uint i=0;i<nTimesToTx;++i) {
        	send_data(data);
        }
        seqNum++;
        //wait(0.5);
        led1=0;
		logError("Time: %lu", us_ticker_read());
        
        dot->sleep(0, wakeMode, false);  // Go to sleep until wake button
		#endif
		#if BRIDGE_RX
        logInfo("Waiting for new message current DLC: %d", cDwnLink);
        // For Class C device type
//        while (cDwnLink >= dot->getDownLinkCounter()) {
//        	wait(0.1);
//        }
        wait(timeOnAir*2.0/1000.0); // Wait twice the time on air
        if (cDwnLink < dot->getDownLinkCounter()) {
			led1 = 1;
			cDwnLink = dot->getDownLinkCounter();
			dot->recv(data);
			std::string dataStr(data.begin(), data.end());
			logInfo("Got msg num: %d, payload: %s", seqNum, dataStr.c_str());
			seqNum++;
			wait(0.5);
        }
		led1=0;
        dot->sleep(2, wakeMode, false);  // Go to sleep until wake button

		#endif
    }
 
    return 0;
}