frank dunn / Mbed OS example-ttn-workshop_c027

example for iot course with c027 and sx1276 module

main.cpp@51:623b49958f8d, 2019-05-24 (annotated)

Committer:
frank_dunn1
Date:
Fri May 24 19:00:01 2019 +0000
Revision:
51:623b49958f8d
Parent:
50:6e615eea1e6f 
test

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 0:7037ed05f54f 1 /**
mbed_official 0:7037ed05f54f 2 * Copyright (c) 2017, Arm Limited and affiliates.
mbed_official 0:7037ed05f54f 3 * SPDX-License-Identifier: Apache-2.0
mbed_official 0:7037ed05f54f 4 *
mbed_official 0:7037ed05f54f 5 * Licensed under the Apache License, Version 2.0 (the "License");
mbed_official 0:7037ed05f54f 6 * you may not use this file except in compliance with the License.
mbed_official 0:7037ed05f54f 7 * You may obtain a copy of the License at
mbed_official 0:7037ed05f54f 8 *
mbed_official 0:7037ed05f54f 9 * http://www.apache.org/licenses/LICENSE-2.0
mbed_official 0:7037ed05f54f 10 *
mbed_official 0:7037ed05f54f 11 * Unless required by applicable law or agreed to in writing, software
mbed_official 0:7037ed05f54f 12 * distributed under the License is distributed on an "AS IS" BASIS,
mbed_official 0:7037ed05f54f 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mbed_official 0:7037ed05f54f 14 * See the License for the specific language governing permissions and
mbed_official 0:7037ed05f54f 15 * limitations under the License.
mbed_official 0:7037ed05f54f 16 */
frank_dunn1 51:623b49958f8d 17 #include <mbed.h>
mbed_official 0:7037ed05f54f 18 #include <stdio.h>
mbed_official 3:8c7198d1a2a1 19
mbed_official 0:7037ed05f54f 20 #include "lorawan/LoRaWANInterface.h"
mbed_official 0:7037ed05f54f 21 #include "lorawan/system/lorawan_data_structures.h"
mbed_official 0:7037ed05f54f 22 #include "events/EventQueue.h"
mbed_official 0:7037ed05f54f 23
mbed_official 0:7037ed05f54f 24 // Application helpers
mbed_official 0:7037ed05f54f 25 #include "trace_helper.h"
mbed_official 0:7037ed05f54f 26 #include "lora_radio_helper.h"
mbed_official 0:7037ed05f54f 27
mbed_official 0:7037ed05f54f 28 using namespace events;
mbed_official 0:7037ed05f54f 29
mbed_official 12:5015dfead3f2 30 // Max payload size can be LORAMAC_PHY_MAXPAYLOAD.
mbed_official 12:5015dfead3f2 31 // This example only communicates with much shorter messages (<30 bytes).
mbed_official 12:5015dfead3f2 32 // If longer messages are used, these buffers must be changed accordingly.
mbed_official 12:5015dfead3f2 33 uint8_t tx_buffer[30];
mbed_official 12:5015dfead3f2 34 uint8_t rx_buffer[30];
mbed_official 0:7037ed05f54f 35
mbed_official 0:7037ed05f54f 36 /*
mbed_official 0:7037ed05f54f 37 * Sets up an application dependent transmission timer in ms. Used only when Duty Cycling is off for testing
mbed_official 0:7037ed05f54f 38 */
mbed_official 0:7037ed05f54f 39 #define TX_TIMER 10000
mbed_official 0:7037ed05f54f 40
mbed_official 0:7037ed05f54f 41 /**
mbed_official 0:7037ed05f54f 42 * Maximum number of events for the event queue.
mbed_official 12:5015dfead3f2 43 * 10 is the safe number for the stack events, however, if application
mbed_official 0:7037ed05f54f 44 * also uses the queue for whatever purposes, this number should be increased.
mbed_official 0:7037ed05f54f 45 */
mbed_official 12:5015dfead3f2 46 #define MAX_NUMBER_OF_EVENTS 10
mbed_official 0:7037ed05f54f 47
mbed_official 0:7037ed05f54f 48 /**
mbed_official 0:7037ed05f54f 49 * Maximum number of retries for CONFIRMED messages before giving up
mbed_official 0:7037ed05f54f 50 */
mbed_official 0:7037ed05f54f 51 #define CONFIRMED_MSG_RETRY_COUNTER 3
mbed_official 0:7037ed05f54f 52
mbed_official 0:7037ed05f54f 53
mbed_official 0:7037ed05f54f 54 /**
mbed_official 0:7037ed05f54f 55 * This event queue is the global event queue for both the
mbed_official 0:7037ed05f54f 56 * application and stack. To conserve memory, the stack is designed to run
mbed_official 0:7037ed05f54f 57 * in the same thread as the application and the application is responsible for
mbed_official 0:7037ed05f54f 58 * providing an event queue to the stack that will be used for ISR deferment as
mbed_official 0:7037ed05f54f 59 * well as application information event queuing.
mbed_official 0:7037ed05f54f 60 */
mbed_official 46:a124538e2891 61 static EventQueue ev_queue(MAX_NUMBER_OF_EVENTS *EVENTS_EVENT_SIZE);
mbed_official 0:7037ed05f54f 62
mbed_official 0:7037ed05f54f 63 /**
mbed_official 0:7037ed05f54f 64 * Event handler.
mbed_official 0:7037ed05f54f 65 *
mbed_official 0:7037ed05f54f 66 * This will be passed to the LoRaWAN stack to queue events for the
mbed_official 0:7037ed05f54f 67 * application which in turn drive the application.
mbed_official 0:7037ed05f54f 68 */
mbed_official 0:7037ed05f54f 69 static void lora_event_handler(lorawan_event_t event);
mbed_official 0:7037ed05f54f 70
mbed_official 0:7037ed05f54f 71 /**
mbed_official 46:a124538e2891 72 * Constructing Mbed LoRaWANInterface and passing it the radio object from lora_radio_helper.
mbed_official 0:7037ed05f54f 73 */
mbed_official 2:dc95ac6d6d4e 74 static LoRaWANInterface lorawan(radio);
mbed_official 0:7037ed05f54f 75
mbed_official 0:7037ed05f54f 76 /**
mbed_official 0:7037ed05f54f 77 * Application specific callbacks
mbed_official 0:7037ed05f54f 78 */
mbed_official 0:7037ed05f54f 79 static lorawan_app_callbacks_t callbacks;
mbed_official 0:7037ed05f54f 80
mbed_official 0:7037ed05f54f 81 /**
mbed_official 0:7037ed05f54f 82 * Entry point for application
mbed_official 0:7037ed05f54f 83 */
mbed_official 46:a124538e2891 84 int main(void)
mbed_official 0:7037ed05f54f 85 {
frank_dunn1 51:623b49958f8d 86 DigitalOut resetPin(A0);
frank_dunn1 51:623b49958f8d 87 resetPin = false ;
frank_dunn1 51:623b49958f8d 88
mbed_official 0:7037ed05f54f 89 // setup tracing
mbed_official 0:7037ed05f54f 90 setup_trace();
mbed_official 0:7037ed05f54f 91
mbed_official 0:7037ed05f54f 92 // stores the status of a call to LoRaWAN protocol
mbed_official 0:7037ed05f54f 93 lorawan_status_t retcode;
mbed_official 0:7037ed05f54f 94
mbed_official 0:7037ed05f54f 95 // Initialize LoRaWAN stack
mbed_official 2:dc95ac6d6d4e 96 if (lorawan.initialize(&ev_queue) != LORAWAN_STATUS_OK) {
mbed_official 0:7037ed05f54f 97 printf("\r\n LoRa initialization failed! \r\n");
mbed_official 0:7037ed05f54f 98 return -1;
mbed_official 0:7037ed05f54f 99 }
mbed_official 0:7037ed05f54f 100
mbed_official 0:7037ed05f54f 101 printf("\r\n Mbed LoRaWANStack initialized \r\n");
mbed_official 0:7037ed05f54f 102
mbed_official 0:7037ed05f54f 103 // prepare application callbacks
mbed_official 0:7037ed05f54f 104 callbacks.events = mbed::callback(lora_event_handler);
mbed_official 2:dc95ac6d6d4e 105 lorawan.add_app_callbacks(&callbacks);
mbed_official 0:7037ed05f54f 106
mbed_official 0:7037ed05f54f 107 // Set number of retries in case of CONFIRMED messages
mbed_official 2:dc95ac6d6d4e 108 if (lorawan.set_confirmed_msg_retries(CONFIRMED_MSG_RETRY_COUNTER)
mbed_official 46:a124538e2891 109 != LORAWAN_STATUS_OK) {
mbed_official 0:7037ed05f54f 110 printf("\r\n set_confirmed_msg_retries failed! \r\n\r\n");
mbed_official 0:7037ed05f54f 111 return -1;
mbed_official 0:7037ed05f54f 112 }
mbed_official 0:7037ed05f54f 113
mbed_official 0:7037ed05f54f 114 printf("\r\n CONFIRMED message retries : %d \r\n",
mbed_official 0:7037ed05f54f 115 CONFIRMED_MSG_RETRY_COUNTER);
mbed_official 0:7037ed05f54f 116
mbed_official 0:7037ed05f54f 117 // Enable adaptive data rate
mbed_official 2:dc95ac6d6d4e 118 if (lorawan.enable_adaptive_datarate() != LORAWAN_STATUS_OK) {
mbed_official 0:7037ed05f54f 119 printf("\r\n enable_adaptive_datarate failed! \r\n");
mbed_official 0:7037ed05f54f 120 return -1;
mbed_official 0:7037ed05f54f 121 }
mbed_official 0:7037ed05f54f 122
mbed_official 0:7037ed05f54f 123 printf("\r\n Adaptive data rate (ADR) - Enabled \r\n");
mbed_official 0:7037ed05f54f 124
mbed_official 2:dc95ac6d6d4e 125 retcode = lorawan.connect();
mbed_official 0:7037ed05f54f 126
mbed_official 0:7037ed05f54f 127 if (retcode == LORAWAN_STATUS_OK ||
mbed_official 46:a124538e2891 128 retcode == LORAWAN_STATUS_CONNECT_IN_PROGRESS) {
mbed_official 0:7037ed05f54f 129 } else {
mbed_official 0:7037ed05f54f 130 printf("\r\n Connection error, code = %d \r\n", retcode);
mbed_official 0:7037ed05f54f 131 return -1;
mbed_official 0:7037ed05f54f 132 }
mbed_official 0:7037ed05f54f 133
mbed_official 0:7037ed05f54f 134 printf("\r\n Connection - In Progress ...\r\n");
mbed_official 0:7037ed05f54f 135
mbed_official 0:7037ed05f54f 136 // make your event queue dispatching events forever
mbed_official 0:7037ed05f54f 137 ev_queue.dispatch_forever();
mbed_official 3:8c7198d1a2a1 138
mbed_official 3:8c7198d1a2a1 139 return 0;
mbed_official 0:7037ed05f54f 140 }
mbed_official 0:7037ed05f54f 141
mbed_official 0:7037ed05f54f 142 /**
mbed_official 0:7037ed05f54f 143 * Sends a message to the Network Server
mbed_official 0:7037ed05f54f 144 */
mbed_official 0:7037ed05f54f 145 static void send_message()
mbed_official 0:7037ed05f54f 146 {
mbed_official 0:7037ed05f54f 147 uint16_t packet_len;
mbed_official 0:7037ed05f54f 148 int16_t retcode;
marcozecchini 50:6e615eea1e6f 149 printf("\n\rHello world");
mbed_official 0:7037ed05f54f 150
marcozecchini 50:6e615eea1e6f 151 packet_len = sprintf((char *) tx_buffer, "Hello world");
mbed_official 0:7037ed05f54f 152
mbed_official 2:dc95ac6d6d4e 153 retcode = lorawan.send(MBED_CONF_LORA_APP_PORT, tx_buffer, packet_len,
mbed_official 47:b6d132f1079f 154 MSG_UNCONFIRMED_FLAG);
mbed_official 0:7037ed05f54f 155
mbed_official 0:7037ed05f54f 156 if (retcode < 0) {
mbed_official 0:7037ed05f54f 157 retcode == LORAWAN_STATUS_WOULD_BLOCK ? printf("send - WOULD BLOCK\r\n")
mbed_official 46:a124538e2891 158 : printf("\r\n send() - Error code %d \r\n", retcode);
mbed_official 26:f07f5febf97f 159
mbed_official 26:f07f5febf97f 160 if (retcode == LORAWAN_STATUS_WOULD_BLOCK) {
mbed_official 26:f07f5febf97f 161 //retry in 3 seconds
mbed_official 26:f07f5febf97f 162 if (MBED_CONF_LORA_DUTY_CYCLE_ON) {
mbed_official 26:f07f5febf97f 163 ev_queue.call_in(3000, send_message);
mbed_official 26:f07f5febf97f 164 }
mbed_official 26:f07f5febf97f 165 }
mbed_official 0:7037ed05f54f 166 return;
mbed_official 0:7037ed05f54f 167 }
mbed_official 0:7037ed05f54f 168
mbed_official 0:7037ed05f54f 169 printf("\r\n %d bytes scheduled for transmission \r\n", retcode);
mbed_official 12:5015dfead3f2 170 memset(tx_buffer, 0, sizeof(tx_buffer));
mbed_official 0:7037ed05f54f 171 }
mbed_official 0:7037ed05f54f 172
mbed_official 0:7037ed05f54f 173 /**
mbed_official 0:7037ed05f54f 174 * Event handler
mbed_official 0:7037ed05f54f 175 */
mbed_official 0:7037ed05f54f 176 static void lora_event_handler(lorawan_event_t event)
mbed_official 0:7037ed05f54f 177 {
mbed_official 0:7037ed05f54f 178 switch (event) {
mbed_official 0:7037ed05f54f 179 case CONNECTED:
mbed_official 0:7037ed05f54f 180 printf("\r\n Connection - Successful \r\n");
mbed_official 0:7037ed05f54f 181 if (MBED_CONF_LORA_DUTY_CYCLE_ON) {
mbed_official 0:7037ed05f54f 182 send_message();
mbed_official 0:7037ed05f54f 183 } else {
mbed_official 0:7037ed05f54f 184 ev_queue.call_every(TX_TIMER, send_message);
mbed_official 0:7037ed05f54f 185 }
mbed_official 0:7037ed05f54f 186
mbed_official 0:7037ed05f54f 187 break;
mbed_official 0:7037ed05f54f 188 case DISCONNECTED:
mbed_official 0:7037ed05f54f 189 ev_queue.break_dispatch();
mbed_official 0:7037ed05f54f 190 printf("\r\n Disconnected Successfully \r\n");
mbed_official 0:7037ed05f54f 191 break;
mbed_official 0:7037ed05f54f 192 case TX_DONE:
mbed_official 0:7037ed05f54f 193 printf("\r\n Message Sent to Network Server \r\n");
mbed_official 0:7037ed05f54f 194 if (MBED_CONF_LORA_DUTY_CYCLE_ON) {
mbed_official 0:7037ed05f54f 195 send_message();
mbed_official 0:7037ed05f54f 196 }
mbed_official 0:7037ed05f54f 197 break;
mbed_official 0:7037ed05f54f 198 case TX_TIMEOUT:
mbed_official 0:7037ed05f54f 199 case TX_ERROR:
mbed_official 0:7037ed05f54f 200 case TX_CRYPTO_ERROR:
mbed_official 0:7037ed05f54f 201 case TX_SCHEDULING_ERROR:
mbed_official 0:7037ed05f54f 202 printf("\r\n Transmission Error - EventCode = %d \r\n", event);
mbed_official 0:7037ed05f54f 203 // try again
mbed_official 0:7037ed05f54f 204 if (MBED_CONF_LORA_DUTY_CYCLE_ON) {
mbed_official 0:7037ed05f54f 205 send_message();
mbed_official 0:7037ed05f54f 206 }
mbed_official 0:7037ed05f54f 207 break;
mbed_official 0:7037ed05f54f 208 case RX_DONE:
mbed_official 0:7037ed05f54f 209 printf("\r\n Received message from Network Server \r\n");
mbed_official 0:7037ed05f54f 210 break;
mbed_official 0:7037ed05f54f 211 case RX_TIMEOUT:
mbed_official 0:7037ed05f54f 212 case RX_ERROR:
mbed_official 0:7037ed05f54f 213 printf("\r\n Error in reception - Code = %d \r\n", event);
mbed_official 0:7037ed05f54f 214 break;
mbed_official 0:7037ed05f54f 215 case JOIN_FAILURE:
mbed_official 0:7037ed05f54f 216 printf("\r\n OTAA Failed - Check Keys \r\n");
mbed_official 0:7037ed05f54f 217 break;
mbed_official 26:f07f5febf97f 218 case UPLINK_REQUIRED:
mbed_official 26:f07f5febf97f 219 printf("\r\n Uplink required by NS \r\n");
mbed_official 26:f07f5febf97f 220 if (MBED_CONF_LORA_DUTY_CYCLE_ON) {
mbed_official 26:f07f5febf97f 221 send_message();
mbed_official 26:f07f5febf97f 222 }
mbed_official 26:f07f5febf97f 223 break;
mbed_official 0:7037ed05f54f 224 default:
mbed_official 0:7037ed05f54f 225 MBED_ASSERT("Unknown Event");
mbed_official 0:7037ed05f54f 226 }
mbed_official 0:7037ed05f54f 227 }
mbed_official 0:7037ed05f54f 228
mbed_official 0:7037ed05f54f 229 // EOF