File content as of revision 31:f03c183e2bf6:

/**
 * Copyright (c) 2017, Arm Limited and affiliates.
 * SPDX-License-Identifier: Apache-2.0
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#include <stdio.h>
#include "mbed.h"

#include "lorawan/LoRaWANInterface.h"
#include "lorawan/system/lorawan_data_structures.h"
#include "events/EventQueue.h"

// Application helpers
#include "DummySensor.h"
#include "trace_helper.h"
#include "lora_radio_helper.h"

#include "mbed-trace/mbed_trace.h"
#define TRACE_GROUP "MAIN"

using namespace events;

// Max payload size can be LORAMAC_PHY_MAXPAYLOAD.
// This example only communicates with much shorter messages (<30 bytes).
// If longer messages are used, these buffers must be changed accordingly.
uint8_t tx_buffer[30];
uint8_t rx_buffer[30];

/*
 * Sets up an application dependent transmission timer in ms. Used only when Duty Cycling is off for testing
 */
#define TX_TIMER                        10000

/**
 * Maximum number of events for the event queue.
 * 10 is the safe number for the stack events, however, if application
 * also uses the queue for whatever purposes, this number should be increased.
 */
#define MAX_NUMBER_OF_EVENTS            10

/**
 * Maximum number of retries for CONFIRMED messages before giving up
 */
#define CONFIRMED_MSG_RETRY_COUNTER     15

/**
 * Dummy pin for dummy sensor
 */
#define PC_9                            0

/**
 * Dummy sensor class object
 */
DS1820  ds1820(PC_9);

/**
* This event queue is the global event queue for both the
* application and stack. To conserve memory, the stack is designed to run
* in the same thread as the application and the application is responsible for
* providing an event queue to the stack that will be used for ISR deferment as
* well as application information event queuing.
*/
static EventQueue ev_queue(MAX_NUMBER_OF_EVENTS * EVENTS_EVENT_SIZE);

/**
 * Event handler.
 *
 * This will be passed to the LoRaWAN stack to queue events for the
 * application which in turn drive the application.
 */
static void lora_event_handler(lorawan_event_t event);

/**
 * Constructing Mbed LoRaWANInterface and passing it down the radio object.
 */
static LoRaWANInterface lorawan(radio);

/**
 * Application specific callbacks
 */
static lorawan_app_callbacks_t callbacks;

int mytime;
int mybatt;
double mylat;
double mylon;

#define NEOM8M_ADR_GPS (0x42 >> 1)
#define LSM303_ADR_ACC (0x32 >> 1)
#define LSM303_ADR_MAG (0x3C >> 1)

I2C i2c(PB_9, PB_8);

/**
 * Entry point for application
 */
int main (void)
{
    // setup tracing
    setup_trace();

    // stores the status of a call to LoRaWAN protocol
    lorawan_status_t retcode;

    printf("\r\n- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -\r\n");
    
    mytime = 0;
    mybatt = 15;
    mylat = 51.06509;
    mylon = -114.08895;

    // Initialize LoRaWAN stack
    if (lorawan.initialize(&ev_queue) != LORAWAN_STATUS_OK) {
        printf("\r\n LoRa initialization failed! \r\n");
        return -1;
    }

    printf("\r\n Mbed LoRaWANStack initialized \r\n");
    //printf("MBED_CONF_LORA_APP_PORT: %d", MBED_CONF_LORA_APP_PORT);

    // prepare application callbacks
    callbacks.events = mbed::callback(lora_event_handler);
    lorawan.add_app_callbacks(&callbacks);

    // Set number of retries in case of CONFIRMED messages
    if (lorawan.set_confirmed_msg_retries(CONFIRMED_MSG_RETRY_COUNTER)
                                          != LORAWAN_STATUS_OK) {
        printf("\r\n set_confirmed_msg_retries failed! \r\n\r\n");
        return -1;
    }

    printf("\r\n CONFIRMED message retries : %d \r\n",
           CONFIRMED_MSG_RETRY_COUNTER);

    // Enable adaptive data rate
    if (lorawan.enable_adaptive_datarate() != LORAWAN_STATUS_OK) {
        printf("\r\n enable_adaptive_datarate failed! \r\n");
        return -1;
    }

    printf("\r\n Adaptive data  rate (ADR) - Enabled \r\n");

    retcode = lorawan.connect();
    /*if (retcode == LORAWAN_STATUS_CONNECT_IN_PROGRESS) {
        printf("Retcode = Connecting.");
    }*/
    if (retcode == LORAWAN_STATUS_OK ||
        retcode == LORAWAN_STATUS_CONNECT_IN_PROGRESS) {
    } else {
        printf("\r\n Connection error, code = %d \r\n", retcode);
        return -1;
    }

    printf("\r\n Connection - In Progress ...\r\n");

    // make your event queue dispatching events forever
    ev_queue.dispatch_forever();

    return 0;
}

/**
 * Sends a message to the Network Server
 */
static void send_message()
{
    uint16_t packet_len;
    int16_t retcode;
    float sensor_value;

    if (ds1820.begin()) {
        ds1820.startConversion();
        sensor_value = ds1820.read();
        printf("\r\n Dummy Sensor Value = %3.1f \r\n", sensor_value);
        ds1820.startConversion();
    } else {
        printf("\r\n No sensor found \r\n");
        return;
    }

    //packet_len = sprintf((char*) tx_buffer, "Dummy Sensor Value is %3.1f",
    //                sensor_value);
    //packet_len = sprintf((char*) tx_buffer, "VAL=%3.1f", sensor_value);
    //packet_len = sprintf((char*) tx_buffer, "%d,%d,%f,%f", mytime, mybatt, mylat, mylon);
    //printf("BUF: |%s|", tx_buffer);
    time_t tNow = time(NULL);
    printf("Clock: %d\r\n", tNow);
    mytime = tNow;
    char cmd[2];
    /*
    char buf[1024];
    buf[0] = 0x00;
    buf[1] = 0x00;
    buf[2] = 0x00;
    */
    char buf;
    //cmd[0] = 0xFF;
    //i2c.write(NEOM8M_ADR_GPS, cmd, 1);
    //i2c.read(NEOM8M_ADR_GPS, buf, 1024);
    cmd[0] = 0x20;
    cmd[1] = 0x57;
    i2c.write(LSM303_ADR_ACC, cmd, 2);
    cmd[0] = 0x20;
    i2c.write(LSM303_ADR_ACC, cmd, 1);
    i2c.read(LSM303_ADR_ACC, &buf, 1);
    //i2c.read(LSM303_ADR_ACC, buf, 1);
    printf("Return Value: %02x", buf);
    int ilat = (int)(mylat * 100000);
    int ilon = (int)(mylon * 100000);
    packet_len = 11;
    tx_buffer[0] = (mytime >> 24) & 0xFF;
    tx_buffer[1] = (mytime >> 16) & 0xFF;
    tx_buffer[2] = (mytime >> 8) & 0xFF;
    tx_buffer[3] = (mytime >> 0) & 0xFF;
    tx_buffer[4] = ((mybatt << 4) & 0xF0) | ((ilat >> 22) & 0x0F);
    tx_buffer[5] = (ilat >> 14) & 0xFF;
    tx_buffer[6] = (ilat >> 6) & 0xFF;
    tx_buffer[7] = ((ilat << 2) & 0xFC) | ((ilon >> 24) & 0x03);
    tx_buffer[8] = (ilon >> 16) & 0xFF;
    tx_buffer[9] = (ilon >> 8) & 0xFF;
    tx_buffer[10] = (ilon >> 0) & 0xFF;
    printf("\r\nBUF: |");
    int i;
    for (i = 0; i < packet_len; i++) { printf("%02x", tx_buffer[i]); }
    printf("|\r\n");
    mytime++;
    if (mybatt == 0) { mybatt = 15; } else { mybatt--; }
    retcode = lorawan.send(MBED_CONF_LORA_APP_PORT, tx_buffer, packet_len,
                           MSG_CONFIRMED_FLAG);

    if (retcode < 0) {
        retcode == LORAWAN_STATUS_WOULD_BLOCK ? printf("send - WOULD BLOCK\r\n")
                : printf("\r\n send() - Error code %d \r\n", retcode);

        if (retcode == LORAWAN_STATUS_WOULD_BLOCK) {
            //retry in 3 seconds
            if (MBED_CONF_LORA_DUTY_CYCLE_ON) {
                ev_queue.call_in(3000, send_message);
            }
        }
        return;
    }

    printf("\r\n %d bytes scheduled for transmission \r\n", retcode);
    memset(tx_buffer, 0, sizeof(tx_buffer));
}

/**
 * Receive a message from the Network Server
 */
static void receive_message()
{
    int16_t retcode;
    retcode = lorawan.receive(MBED_CONF_LORA_APP_PORT, rx_buffer,
                              sizeof(rx_buffer),
                              MSG_CONFIRMED_FLAG|MSG_UNCONFIRMED_FLAG);

    if (retcode < 0) {
        printf("\r\n receive() - Error code %d \r\n", retcode);
        return;
    }

    printf(" Data:");

    for (uint8_t i = 0; i < retcode; i++) {
        printf("%x", rx_buffer[i]);
    }

    printf("\r\n Data Length: %d\r\n", retcode);

    memset(rx_buffer, 0, sizeof(rx_buffer));
}

/**
 * Event handler
 */
static void lora_event_handler(lorawan_event_t event)
{
    tr_debug("In lora_event_handler(%d)...", event);
    switch (event) {
        case CONNECTED:
            printf("\r\n Connection - Successful \r\n");
            if (MBED_CONF_LORA_DUTY_CYCLE_ON) {
                send_message();
            } else {
                ev_queue.call_every(TX_TIMER, send_message);
            }

            break;
        case DISCONNECTED:
            ev_queue.break_dispatch();
            printf("\r\n Disconnected Successfully \r\n");
            break;
        case TX_DONE:
            printf("\r\n Message Sent to Network Server \r\n");
            if (MBED_CONF_LORA_DUTY_CYCLE_ON) {
                send_message();
            }
            break;
        case TX_TIMEOUT:
        case TX_ERROR:
        case TX_CRYPTO_ERROR:
        case TX_SCHEDULING_ERROR:
            printf("\r\n Transmission Error - EventCode = %d \r\n", event);
            // try again
            if (MBED_CONF_LORA_DUTY_CYCLE_ON) {
                send_message();
            }
            break;
        case RX_DONE:
            printf("\r\n Received message from Network Server \r\n");
            receive_message();
            break;
        case RX_TIMEOUT:
        case RX_ERROR:
            printf("\r\n Error in reception - Code = %d \r\n", event);
            break;
        case JOIN_FAILURE:
            printf("\r\n OTAA Failed - Check Keys \r\n");
            break;
        case UPLINK_REQUIRED:
            printf("\r\n Uplink required by NS \r\n");
            if (MBED_CONF_LORA_DUTY_CYCLE_ON) {
                send_message();
            }
            break;
        default:
            MBED_ASSERT("Unknown Event");
    }
}

// EOF