Diff: main.cpp

Revision:

0:895bbd4e6398

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Sep 01 21:06:51 2020 +0800
@@ -0,0 +1,273 @@
+/**
+ * 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 "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"
+
+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     3
+
+/**
+ * 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 the radio object from lora_radio_helper.
+ */
+static LoRaWANInterface lorawan(radio);
+
+/**
+ * Application specific callbacks
+ */
+static lorawan_app_callbacks_t callbacks;
+
+/**
+ * Entry point for application
+ */
+int main(void)
+{
+#ifdef MBED_MAJOR_VERSION
+    printf("Mbed OS version %d.%d.%d\r\n\n", MBED_MAJOR_VERSION, MBED_MINOR_VERSION, MBED_PATCH_VERSION);
+#endif
+    // setup tracing
+    setup_trace();
+
+    // stores the status of a call to LoRaWAN protocol
+    lorawan_status_t retcode;
+
+    // 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");
+
+    // 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_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;
+    int32_t sensor_value;
+
+    if (ds1820.begin()) {
+        ds1820.startConversion();
+        sensor_value = ds1820.read();
+        printf("\r\n Dummy Sensor Value = %d \r\n", sensor_value);
+        ds1820.startConversion();
+    } else {
+        printf("\r\n No sensor found \r\n");
+        return;
+    }
+
+    packet_len = sprintf((char *) tx_buffer, "Val: %d",
+                         sensor_value);
+
+    retcode = lorawan.send(MBED_CONF_LORA_APP_PORT, tx_buffer, packet_len,
+                           MSG_UNCONFIRMED_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()
+{
+    uint8_t port;
+    int flags;
+    int16_t retcode = lorawan.receive(rx_buffer, sizeof(rx_buffer), port, flags);
+
+    if (retcode < 0) {
+        printf("\r\n receive() - Error code %d \r\n", retcode);
+        return;
+    }
+
+    printf(" RX Data on port %u (%d bytes): ", port, retcode);
+    for (uint8_t i = 0; i < retcode; i++) {
+        printf("%02x ", rx_buffer[i]);
+    }
+    printf("\r\n");
+    
+    memset(rx_buffer, 0, sizeof(rx_buffer));
+}
+
+/**
+ * Event handler
+ */
+static void lora_event_handler(lorawan_event_t 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