Diff: camera.h

Revision:

0:4a30986db2fb

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/camera.h	Fri Dec 19 11:49:27 2014 +0000
@@ -0,0 +1,111 @@
+/**
+*
+*   Code to get data from the camera by connecting to a web server via WiFi (using Adafruit CC3000).
+*
+*   author: Leo Kam
+*
+*
+*   The code to connect to the web via Adafruit is adapted from the code by Ben Zhang and Antonio Iannopollo, found at 
+*   http://developer.mbed.org/users/nebgnahz/code/CC3000_demo/
+*   The following libraries are used:
+*    - cc3000_hostdriver_mbedsocket
+*     (http://developer.mbed.org/users/Kojto/code/cc3000_hostdriver_mbedsocket/)
+*    - HTTPClient (http://developer.mbed.org/users/donatien/code/HTTPClient/)
+*
+**/
+
+
+#include "mbed.h"
+#include "cc3000.h"
+#include "HTTPClient.h"
+
+// KL25Z wifi connection
+// we need to define connection pins for:
+// - IRQ      => (pin D3)
+// - Enable   => (pin D5)
+// - SPI CS   => (pin D10)
+// - SPI MOSI => (pin D11)
+// - SPI MISO => (pin D12)
+// - SPI CLK  => (pin D13)
+// plus wifi network SSID, password, security level and smart-configuration flag.
+mbed_cc3000::cc3000 wifi(D3, D5, D10, SPI(D11, D12, D13),
+                         "EECS-PSK", "Thequickbrown", WPA2, false);
+
+// create an http instance
+HTTPClient http;
+
+// str is used to hold the response data
+char str[512];
+char * p;
+
+// setup the serial connection, and LEDs
+Serial pc(USBTX, USBRX);
+DigitalOut led_red(LED_RED);
+DigitalOut led_green(LED_GREEN);
+
+void initializeWiFi() {
+    // by default, it's red
+    led_red = 0;
+    led_green = 1;
+    
+    //print message to indicate the program has started
+    pc.printf("CC3000 Sample Program\r\n");
+    wifi.init();
+    pc.printf("Wifi Initialized\r\n");
+    
+    // check connection status
+    while(wifi.is_connected() == false) {
+        // try to connect
+        if (wifi.connect() == -1) {
+            pc.printf("Failed to connect."
+                      "Please verify connection details and try again.\r\n");
+            led_red = 0;
+            led_green = 1;
+        } else {
+            pc.printf("IP address: %s \r\n", wifi.getIPAddress());
+            
+            //once connected, turn green LED on and red LED off, and exit loop
+            led_red = 1;
+            led_green = 0;
+            break;
+        }
+    }
+}
+
+
+/* Get the x, y-coordinates and depth from camera. Return true if successfuly retrieve data from server, else return false and do not change parameters. */
+bool getCameraData(double &x, double &y, double &z, int timeout=2000) {
+    // check connection status
+    while(wifi.is_connected() == false) {
+        // try to connect
+        if (wifi.connect() == -1) {
+            pc.printf("Failed to connect."
+                      "Please verify connection details and try again.\r\n");
+            led_red = 0;
+            led_green = 1;
+        } else {
+            pc.printf("IP address: %s \r\n", wifi.getIPAddress());
+            
+            //once connected, turn green LED on and red LED off, and exit loop
+            led_red = 1;
+            led_green = 0;
+            break;
+        }
+    }
+    int ret = http.get("https://pew-pew-pew.herokuapp.com/position", str, 512);
+    if (!ret) {
+        p = strtok(str, " ");
+        x = atof(p);
+        p = strtok(NULL, " ");
+        y = atof(p);
+        p = strtok(NULL, " ");
+        z = atof(p);
+        pc.printf("Camera data: %f %f %f\r\n", x, y, z);
+        return true;
+    } else {
+        /*pc.printf("Error - ret = %d - HTTP return code = %d\r\n",
+                  ret,
+                  http.getHTTPResponseCode());*/
+        return false;
+    }
+}