Revision 0:e2c6c039dfbe, committed 2014-03-02

Comitter:

pasky

Date:

Sun Mar 02 01:51:30 2014 +0000

Child:

1:6089a521fcc6

Commit message:

Initial revision - reference the current PubNub library, include a working demo that connects PubNub with features of the mbed application board

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/C12832_lcd.lib	Sun Mar 02 01:51:30 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/dreschpe/code/C12832_lcd/#8f86576007d6

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/EthernetInterface.lib	Sun Mar 02 01:51:30 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/EthernetInterface/#6a67d2bddc7c

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/LM75B.lib	Sun Mar 02 01:51:30 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/chris/code/LM75B/#6a70c9303bbe

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/MMA7660.lib	Sun Mar 02 01:51:30 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/Sissors/code/MMA7660/#a8e20db7901e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PubNub.lib	Sun Mar 02 01:51:30 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/pasky/code/PubNub/#a4759c403023

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PubNubDemo.cpp	Sun Mar 02 01:51:30 2014 +0000
@@ -0,0 +1,161 @@
+#include <cstring>
+
+#include "mbed.h"
+#include "EthernetInterface.h"
+#include "C12832_lcd.h"
+#include "MMA7660.h"
+#include "LM75B.h"
+
+#include "picojson.h"
+#include "PubNub.h"
+
+
+/* Demo of PubNub + the mbed application board. */
+
+/* How to get things set up: */
+/* 1. Tune in at the PubNub Developer Console, with the following
+ * keys (press Subscribe afterwards): */
+const char pubkey[] = "demo";
+const char subkey[] = "demo";
+const char channel[] = "hello_world2";
+/* 2. Attach your mbed board to your computer. A folder should pop up like
+ * if you plug in a USB memory stick. */
+/* 3. Open this example in the mbed web IDE and hit the Compile button. */
+/* 4. A download popup with a .bin file will appear; save it in the USB
+ * mbed folder. */
+/* 5. Press reset button on the mbed to start things up. */
+
+/* You will see the board publish a "status" message that shows its
+ * current temperature and physical tilt.  The board's LCD should
+ * print some progress messages regarding that. */
+/* You can make the board do things too, by sending messages like:
+ * { "send_status": true }
+ * { "lcd": "Hi there!" }
+ * { "beep": true }
+ * { "rgbled": {"r": 0.5, "g": 1, "b": 0} }
+ * Try it out! Paste these in the Message window and press the send icon.
+ */
+
+Serial pc(USBTX, USBRX); // tx, rx
+C12832_LCD lcd; // Graphics LCD
+MMA7660 MMA(p28, p27); // I2C Accelerometer
+LM75B tmp(p28,p27); // I2C Temperature Sensor
+
+PwmOut led_r(p23); // RGB LED with 3 PWM outputs for dimmer control
+PwmOut led_g(p24);
+PwmOut led_b(p25);
+PwmOut speaker(p26); // Speaker with PWM driver
+
+EthernetInterface eth;
+PubNub pn(pubkey, subkey);
+
+void status_msg(PubNub &pn)
+{
+    /* Read sensors. */
+    float m[3];
+    MMA.readData(m);
+    float temp = tmp.read();
+
+    /* Print on LCD. */
+    lcd.printf("pub: mx=%.2f, my=%.2f, mz=%.2f, t=%.2f  \n", m[0], m[1], m[2], temp);
+
+    /* Prepare JSON message. */
+    char jsonmsg[128];
+    snprintf(jsonmsg, sizeof(jsonmsg),
+            "{\"status\":{\"mx\":%.2f,\"my\":%.2f,\"mz\":%.2f,\"temp\":%.2f}}",
+            m[0], m[1], m[2], temp);
+
+#if 0
+    /* In some rare situations, you might want to instead use picojson
+     * to construct JSON messages, even though it takes a lot of memory: */
+
+    printf("%d: ", __LINE__); __heapstats((__heapprt)fprintf, stdout);
+    picojson::value msg(picojson::object_type, false);
+    picojson::object &msgo = msg.get<picojson::object>();
+    msgo["status"] = picojson::value(picojson::object_type, false);
+    picojson::object &status = msgo["status"].get<picojson::object>();
+    status["mx"] = picojson::value(double(mx));
+    status["my"] = picojson::value(double(my));
+    status["temp"] = picojson::value(temp);
+    strcpy(jsonmsg, msg.serialize().c_str());
+    printf("%d: ", __LINE__); __heapstats((__heapprt)fprintf, stdout);
+#endif
+
+    /* Publish on PubNub. */
+    PubNubRes ret = pn.publish(channel, jsonmsg);
+    if (ret != PNR_OK)
+        lcd.printf("puberr: %d  \n", ret);
+}
+
+void process_msg(PubNub &pn, const char *jsonmsg)
+{
+    /* Use the picojson parser since we want to deal with complex messages.
+     * If you are short on memory, you can find an example for parsing simple
+     * JSON messages in the PubNub::subscribe() API docs. */
+    picojson::value msg;
+    std::string err = picojson::parse(msg, jsonmsg, jsonmsg + strlen(jsonmsg));
+    if (!err.empty()) {
+        lcd.printf("JSON parse: %s  \n", err.c_str());
+        return;
+    }
+
+    if (msg.get("send_status").get<bool>()) {
+        status_msg(pn);
+    }
+    if (msg.get("lcd").is<std::string>()) {
+        lcd.printf("in: %s  \n", msg.get("lcd").get<std::string>().c_str());
+    }
+    if (msg.get("beep").is<bool>()) {
+        speaker = msg.get("beep").get<bool>() ? 0.5 : 0;
+    }
+    if (msg.get("led").is<picojson::object>()) {
+        picojson::value led = msg.get("led");
+        if (led.get("r").is<double>()) led_r = 1.0 - led.get("r").get<double>();
+        if (led.get("g").is<double>()) led_g = 1.0 - led.get("g").get<double>();
+        if (led.get("b").is<double>()) led_b = 1.0 - led.get("b").get<double>();
+    }
+}
+
+int main()
+{
+    /* For debugging, you may find it useful to print memory usage
+     * stats. AvailableMemory may be flaky, but the following is nice.
+     * It will get printed to the USB serial port interface. */
+    printf("%d: ", __LINE__); __heapstats((__heapprt)fprintf, stdout);
+
+    /* Generate a 800Hz tone using PWM hardware output */
+    speaker.period(1.0/800.0); // 800hz period
+    led_r = led_g = led_b = 1.0; // lights out
+
+    lcd.cls();
+    lcd.locate(0,0);
+
+    if (!MMA.testConnection())
+        lcd.printf("MMA error  \n");
+
+    eth.init(); // Use DHCP
+    eth.connect();
+    
+    status_msg(pn);
+    // lcd.printf("pub... ");
+
+    while (1) {
+        // lcd.printf("sub... ");
+        printf("%d: ", __LINE__); __heapstats((__heapprt)fprintf, stdout);
+
+        char *reply = NULL;
+        PubNubRes ret = pn.subscribe(channel, &reply);
+        if (ret != PNR_OK) {
+            lcd.printf("suberr: %d  \n", ret);
+            wait(1.0);
+            continue;
+        }
+
+        if (reply) {
+            // lcd.printf("recv(%s)\n", reply);
+            process_msg(pn, reply);
+        }
+
+        wait(0.5); // avoid busy loop in bad situations
+    }
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-rtos.lib	Sun Mar 02 01:51:30 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed-rtos/#f88660a9bed1

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Sun Mar 02 01:51:30 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mbed_official/code/mbed/builds/8e73be2a2ac1
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/picojson.lib	Sun Mar 02 01:51:30 2014 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/mimil/code/picojson/#2bb500b021e2