Diff: main.cpp

Revision:

0:5e04051a59b9

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Mon Jan 08 15:02:58 2018 +0000
@@ -0,0 +1,186 @@
+/*******************************************************************************
+ * Copyright (c) 2014, 2015 IBM Corp.
+ *
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License v1.0
+ * and Eclipse Distribution License v1.0 which accompany this distribution.
+ *
+ * The Eclipse Public License is available at
+ *    http://www.eclipse.org/legal/epl-v10.html
+ * and the Eclipse Distribution License is available at
+ *   http://www.eclipse.org/org/documents/edl-v10.php.
+ *
+ * Contributors:
+ *    Ian Craggs - initial API and implementation and/or initial documentation
+ *    Ian Craggs - make sure QoS2 processing works, and add device headers
+ *******************************************************************************/
+
+ /**
+  This is a sample program to illustrate the use of the MQTT Client library
+  on the mbed platform.  The Client class requires two classes which mediate
+  access to system interfaces for networking and timing.  As long as these two
+  classes provide the required public programming interfaces, it does not matter
+  what facilities they use underneath. In this program, they use the mbed
+  system libraries.
+
+ */
+
+ // change this to 1 to output messages to LCD instead of serial
+#define USE_LCD 0
+
+#if USE_LCD
+#include "C12832.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sstream>
+#include <iostream>
+#include <string>
+
+// the actual pins are defined in mbed_app.json and can be overridden per target
+C12832 lcd(LCD_MOSI, LCD_SCK, LCD_MISO, LCD_A0, LCD_NCS);
+
+#define logMessage lcd.cls();lcd.printf
+
+#else
+
+#define logMessage printf
+
+#endif
+
+#define MQTTCLIENT_QOS2 1
+
+#include "easy-connect.h"
+#include "MQTTNetwork.h"
+#include "MQTTmbed.h"
+#include "MQTTClient.h"
+
+PwmOut speaker(p26);
+
+int arrivedcount = 0;
+
+/* Mail */
+typedef struct {
+    int frequency; /* AD result of measured voltage */
+} mail_t;
+
+Mail<mail_t, 16> mail_box;
+
+void messageArrived(MQTT::MessageData& md)
+{
+    MQTT::Message &message = md.message;
+    logMessage("Message arrived: qos %d, retained %d, dup %d, packetid %d\r\n", message.qos, message.retained, message.dup, message.id);
+    logMessage("Payload %.*s\r\n", message.payloadlen, (char*)message.payload);
+    ++arrivedcount;
+    
+    mail_t *mail = mail_box.alloc();
+    
+    int x = atoi((char*)message.payload);
+    mail->frequency = x;
+    
+    mail_box.put(mail);
+    
+    /*for (int i=0; i<10; i++) {
+        speaker.period(1.0/x); // 500hz period
+        speaker =0.25; //25% duty cycle - mid range volume
+        wait(.02);
+        speaker=0.0; // turn off audio
+        wait(0.5);
+    }*/
+}
+
+void threadmusic() {
+        while (true) {
+            osEvent evt = mail_box.get();
+                if (evt.status == osEventMail) {
+                    mail_t *mail = (mail_t*)evt.value.p;
+                    speaker.period(1.0/mail->frequency);
+                    speaker =0.5;
+                    wait(0.5);
+                    speaker=0.0;
+                    wait(0.5);
+                    mail_box.free(mail);
+            }      
+        }    
+    }
+
+Thread thread(threadmusic);
+
+int main(int argc, char* argv[])
+{
+    float version = 0.6;
+    char* topic = "music";
+
+    logMessage("HelloMQTT: version is %.2f\r\n", version);
+
+    NetworkInterface* network = easy_connect(true);
+    if (!network) {
+        return -1;
+    }
+
+    MQTTNetwork mqttNetwork(network);
+
+    MQTT::Client<MQTTNetwork, Countdown> client(mqttNetwork);
+
+    const char* hostname = "10.0.0.133";
+    int port = 1883;
+    logMessage("Connecting to %s:%d\r\n", hostname, port);
+    int rc = mqttNetwork.connect(hostname, port);
+    if (rc != 0)
+        logMessage("rc from TCP connect is %d\r\n", rc);
+
+    MQTTPacket_connectData data = MQTTPacket_connectData_initializer;
+    data.MQTTVersion = 3;
+    data.clientID.cstring = "mbedmusic";
+    data.username.cstring = "testuser";
+    data.password.cstring = "testpassword";
+    if ((rc = client.connect(data)) != 0)
+        logMessage("rc from MQTT connect is %d\r\n", rc);
+
+    if ((rc = client.subscribe(topic, MQTT::QOS2, messageArrived)) != 0)
+        logMessage("rc from MQTT subscribe is %d\r\n", rc);
+
+    /*// QoS 0
+    char buf[100];
+    sprintf(buf, "Hello World!  QoS 0 message from app version %f\r\n", version);
+    message.qos = MQTT::QOS0;
+    message.retained = false;
+    message.dup = false;
+    message.payload = (void*)buf;
+    message.payloadlen = strlen(buf)+1;
+    rc = client.publish(topic, message);
+    while (arrivedcount < 1)
+        client.yield(100);
+
+    // QoS 1
+    sprintf(buf, "Hello World!  QoS 1 message from app version %f\r\n", version);
+    message.qos = MQTT::QOS1;
+    message.payloadlen = strlen(buf)+1;
+    rc = client.publish(topic, message);
+    while (arrivedcount < 2)
+        client.yield(100);
+
+    // QoS 2
+    sprintf(buf, "Hello World!  QoS 2 message from app version %f\r\n", version);
+    message.qos = MQTT::QOS2;
+    message.payloadlen = strlen(buf)+1;
+    rc = client.publish(topic, message);
+    while (arrivedcount < 3)
+        client.yield(100);
+
+    if ((rc = client.unsubscribe(topic)) != 0)
+        logMessage("rc from unsubscribe was %d\r\n", rc);
+
+    if ((rc = client.disconnect()) != 0)
+        logMessage("rc from disconnect was %d\r\n", rc);
+
+    mqttNetwork.disconnect();
+
+    logMessage("Version %.2f: finish %d msgs\r\n", version, arrivedcount);*/
+    
+    while (true){
+        client.yield(700);
+    }
+    
+    return 0;
+}