Diff: main.cpp

Revision:

0:ce142971b8b9

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri Sep 14 07:57:04 2012 +0000
@@ -0,0 +1,182 @@
+#include "mbed.h"
+
+//#define SD_FS
+
+#include "EthernetNetIf.h"
+#include "HTTPServer.h"
+#include "HTTPClient.h"
+#ifdef SD_FS
+#include "SDFileSystem.h"
+#endif
+#include "GPS.h"
+#include "NTPClient.h"
+
+#include "SCP1000.h"
+#include "PachubeClient.h"
+#include "main.h"
+
+/***********
+ *   I/O   *
+ ***********/
+DigitalOut listenStatus(LED1);          // Blink when HTTP server is listening
+DigitalOut ipStatus(LED2);              // Set when IP address acquired
+DigitalOut pollStatus(LED3);            // Reserved
+DigitalOut errorStatus(LED4);           // Blink when error condition occurs; read other LEDs for code.
+
+AnalogIn humiditySensor(p17);           // 
+//AnalogIn tempSensor(p16);               // Temp sensor.
+
+SCP1000 scp1000(p5,p6,p7,p8);           // Temp & pressure.
+
+
+GPS gps(p9, p10);
+
+#ifdef SD_FS
+SDFileSystem sd(p5, p6, p7, p8, "fs");  // the pinout on the mbed Cool Components workshop board
+#else
+LocalFileSystem local("fs");
+#endif
+
+NTPClient ntp;
+
+/**
+ * Blink the error LED and place the error code on the other LEDs.
+ * WARNING: Never returns!
+ *
+ */
+void ledError(ErrorCode code) {
+    listenStatus = code & 1;
+    ipStatus = (code >> 1) & 1;
+    pollStatus = (code >> 2) & 1;
+
+    while (true) {
+        errorStatus = !errorStatus;
+        wait(BLINK_RATE);
+    }
+}
+
+/**
+ * Read sensor data and write it to file.
+ */
+void pollSensors() {
+    int locked = 0;
+    float temp = 0;
+    //float tempB = 0;
+    
+    float lat = 0;
+    float lng = 0;
+    float pressure = 0;
+    float humidity = 0;
+   
+    char * timeStr;
+    time_t ctTime;
+    
+    pollStatus = !pollStatus;
+    
+    FILE* fp = fopen("/fs/sensors.htm", "w");
+    if (fp == NULL) {
+        ledError(ERR_FILE);
+    }
+
+    // Temp
+    // (SensorValue/4) - 50
+    //temp = tempSensor * 160 - 50; // Analog to deg C
+    //temp = 1.8 * temp + 32; // deg C to F.
+    
+    temp = scp1000.readTemperature();
+    temp = 1.8 * temp + 32; // deg C to F
+    
+    // Pressure
+    unsigned long ulPressure = scp1000.readPressure();
+    pressure = ((float) ulPressure) / 1000.0; // Pa to kPa
+    
+    // Humidity
+    // RH (%) = (SensorValue x 0.1906) - 40.2
+    
+    // This might be wrong.
+    humidity = (1000 * humiditySensor * 0.1906) - 40.2;
+    
+    ctTime = time(NULL);
+    ctTime -= 60 * 60 * 4; // Account for timezone offset.
+    timeStr = ctime(&ctTime);
+    
+    int i = 0;
+    while (timeStr[i] != '\0') {
+        if (timeStr[i] == '\n') {
+            timeStr[i] = ' ';
+        }
+        i++;
+    } 
+    
+
+    // True if GPS is locked.
+    //if (gps.sample()) {
+        //locked = 1;
+        //lat = gps.latitude;
+        //lng = gps.longitude;
+    //}
+    
+    fprintf(fp, "{\n\t\"gpsLocked\": %d,\n", locked);
+    fprintf(fp, "\t\"latitude\": %f,\n", lat);
+    fprintf(fp, "\t\"longitude\": %f,\n", lng);
+    fprintf(fp, "\t\"temperature\": %4.2f,\n", temp);
+    fprintf(fp, "\t\"pressure\": %5.2f,\n", pressure);
+    fprintf(fp, "\t\"time\": \"%s ET\",\n", timeStr);
+    fprintf(fp, "\t\"humidity\": %5.2f\n}", humidity);
+    
+    //postFeed(pressure, humidity, temp);
+    
+    fclose(fp);
+}
+
+/**
+ * Flip listening status LED.
+ */
+void flipLed() {
+    listenStatus = !listenStatus;
+}
+
+/**
+ * Entry point
+ */
+int main() {
+    EthernetNetIf eth;
+    HTTPServer server;
+    
+    ipStatus = 0;
+    listenStatus = 0;
+    pollStatus = 0;
+
+    EthernetErr ethErr = eth.setup();
+    if(ethErr) {
+        ledError(ERR_ETHERNET);
+    }
+    
+    Host ntpServer(IpAddr(), 123, "nist1.columbiacountyga.gov");
+    ntp.setTime(ntpServer);
+    
+    ipStatus = 1;
+    
+    // Web root directory
+    FSHandler::mount("/fs", "/");
+  
+    // Bind the filesystem handler for all requests        
+    server.addHandler("/"); // "/" matches every URL
+    server.bind(80); // listen port
+    
+    Ticker ledTicker;
+    ledTicker.attach(&flipLed, BLINK_RATE);
+    
+    pollSensors();
+    
+    Ticker pollTicker;
+    pollTicker.attach(&pollSensors, SENSOR_POLL_RATE);
+    
+    // Listen indefinitely
+    while(true)
+    {
+        Net::poll();
+    }
+  
+    return 0;
+}
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