File content as of revision 9:fdd150f9db9e:

// License: Revised BSD License, see LICENSE.TXT, (c)2015 tamberg.org, (c)2015 Semtech

#include "mbed.h"
#include "lmic.h"
#include "debug.h"

#define LORAWAN_NET_ID (uint32_t) 0x00000000
#define LORAWAN_DEV_ADDR (uint32_t) 0x00001056
#define LORAWAN_ADR_ON 1
#define LORAWAN_CONFIRMED_MSG_ON 1
#define LORAWAN_APP_PORT 15
#define LORAWAN_APP_DATA_SIZE 1 // 32 // max 51

static uint8_t NwkSKey[] = {
    0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
    0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF
};

static uint8_t ArtSKey[] = {
    0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77,
    0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF
};

osjob_t initjob;
osjob_t sendFrameJob;
u1_t n = 0;

void os_getArtEui (uint8_t *buf) {} // ignore
void os_getDevEui (uint8_t *buf) {} // ignore
void os_getDevKey (uint8_t *buf) {} // ignore

void onSendFrame (osjob_t* j) {
    LMIC.frame[0] = n++; // or any other payload
    int result = LMIC_setTxData2(LORAWAN_APP_PORT, LMIC.frame, 
        LORAWAN_APP_DATA_SIZE, LORAWAN_CONFIRMED_MSG_ON); // calls onEvent()
}

void onInit (osjob_t* j) {
    LMIC_reset();
    LMIC_setAdrMode(LORAWAN_ADR_ON);
    LMIC_setDrTxpow(DR_SF12, 14);
    LMIC_setSession(LORAWAN_NET_ID, LORAWAN_DEV_ADDR, NwkSKey, ArtSKey);
    onSendFrame(NULL);
}

void onEvent (ev_t ev) { // called by lmic.cpp, see also oslmic.h
    debug_event(ev);
    if (ev == EV_TXCOMPLETE) {
        os_setCallback(&sendFrameJob, onSendFrame);
    }
}

int main (void) {
    debug_str("main\r\n");
    os_init();
    os_setCallback(&initjob, onInit);
    os_runloop(); // blocking
}