/*
  Web Server
 
 A simple web server that shows the value of the analog input pins.
 using an Arduino Wiznet Ethernet shield. 
 
 Circuit:
 * Ethernet shield attached to pins 10, 11, 12, 13
 * Analog inputs attached to pins A0 through A5 (optional)
 
 created 18 Dec 2009
 by David A. Mellis
 modified 9 Apr 2012
 by Tom Igoe
 
 */

#include <SPI.h>
#include <EthernetV2_0.h>

//define the interface:
#define SS    10 
#define nRST  8  
#define nPWDN 9 
#define nINT 3 

// Enter a MAC address and IP address for your controller below.
// The IP address will be dependent on your local network:
byte mac[] = { 
  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
IPAddress ip(192,168,1, 177);

// Initialize the Ethernet server library
// with the IP address and port you want to use 
// (port 80 is default for HTTP):
EthernetServer server(80);
#define W5200_CS  10
#define SDCARD_CS 4

void setup() {
 // Open serial communications and wait for port to open:
  //Next setting parameter is very important!!!!
  pinMode(SS,OUTPUT);  //Define the interface
  pinMode(nRST,OUTPUT);
  pinMode(nPWDN,OUTPUT);
  pinMode(nINT,INPUT);  
  digitalWrite(nPWDN,LOW);  //enable power
  
  digitalWrite(nRST,LOW);  //Reset W5200
  delay(10);
  digitalWrite(nRST,HIGH);  
  delay(200);       // wait W5200 work
  /////////////////////////////////////////////////////////////
 
 Serial.begin(9600);
 pinMode(SDCARD_CS,OUTPUT);
 digitalWrite(SDCARD_CS,HIGH);//Deselect the SD card
  // start the Ethernet connection and the server:
  Ethernet.begin(mac, ip);
  //Ethernet.begin(mac, ip, dnsIP, gatewayIP, subnetIP);
  server.begin();
  Serial.print("server is at ");
  Serial.println(Ethernet.localIP());
}


void loop() {
  // listen for incoming clients
  EthernetClient client = server.available();
  if (client) {
    Serial.println("new client");
    // an http request ends with a blank line
    boolean currentLineIsBlank = true;
    while (client.connected()) {
      if (client.available()) {
        char c = client.read();
        Serial.write(c);
        // if you've gotten to the end of the line (received a newline
        // character) and the line is blank, the http request has ended,
        // so you can send a reply
        if (c == 'n' && currentLineIsBlank) {
          // send a standard http response header
          client.println("HTTP/1.1 200 OK");
          client.println("Content-Type: text/html");
          client.println("Connnection: close");
          client.println();
          client.println("");
          client.println("");
          // add a meta refresh tag, 
 //so the browser pulls again every 5 seconds:
          client.println("");
          // output the value of each analog input pin
          for (int analogChannel = 0; analogChannel < 6; analogChannel++) {
            int sensorReading = analogRead(analogChannel);
            client.print("analog input ");
            client.print(analogChannel);
            client.print(" is ");
            client.print(sensorReading);
            client.println("");       
          }
          client.println("");
          break;
        }
        if (c == 'n') {
          // you're starting a new line
          currentLineIsBlank = true;
        } 
        else if (c != 'r') {
          // you've gotten a character on the current line
          currentLineIsBlank = false;
        }
      }
    }
    // give the web browser time to receive the data
    delay(1);
    // close the connection:
    client.stop();
    Serial.println("client disonnected");
  }
}