Diff: main.cpp

Revision:

5:0ab8292e37da

Parent:

4:d34811deedab

Child:

6:b38a3b476a45

Child:

10:b47c7921346f

--- a/main.cpp	Wed Feb 04 19:27:26 2015 +0000
+++ b/main.cpp	Mon Mar 16 09:43:13 2015 +0000
@@ -1,63 +1,67 @@
-/* In this example LED1 is switched on/off using a web browser connected to this HTTP server.
+/* 
+ * In this project LED1 on the mbed board is switched on/off using a web browser.
+ * However, you can easily modify the project to remotely switch on/off any external device.
+ * The HTTP server is built from an mbed board and an ENC28J60 board.
+ * ENC28J60 is driven by the UIPEthernet library <https://github.com/ntruchsess/arduino_uip>.
  * The example is based on the Tuxgraphics Web Switch <http://www.tuxgraphics.org/>.
- * This HTTP server is built around the the ENC28J60 chip 
- * driven by the UIPEthernet library <https://github.com/ntruchsess/arduino_uip>
- * ported to mbed.
  */
-
 #include <mbed.h>
 #include <UIPEthernet.h>
 #include <UIPServer.h>
 #include <UIPClient.h>
 #include <string>
 
-using namespace std;
+using namespace     std;
 
 // UIPEthernet is the name of a global instance of UIPEthernetClass.
 // Do not change the name! It is used within the UIPEthernet library.
 #if defined(TARGET_LPC1768)
-UIPEthernetClass UIPEthernet(p11, p12, p13, p8);        // mosi, miso, sck, cs
+UIPEthernetClass    UIPEthernet(p11, p12, p13, p8);         // mosi, miso, sck, cs
 #elif defined(TARGET_LPC1114)
-UIPEthernetClass UIPEthernet(dp2, dp1, dp6, dp25);      // mosi, miso, sck, cs
+UIPEthernetClass    UIPEthernet(dp2, dp1, dp6, dp25);       // mosi, miso, sck, cs
 #elif defined(TARGET_LPC11U68)
-UIPEthernetClass UIPEthernet(P0_9, P0_8, P1_29, P0_2);  // mosi, miso, sck, cs
-#elif defined (TARGET_NUCLEO_F103RB)
-UIPEthernetClass UIPEthernet(PB_5, PB_4, PB_3, PB_6);   // mosi, miso, sck, cs
-#elif defined (TARGET_NUCLEO_F401RE)
-UIPEthernetClass UIPEthernet(PB_5, PB_4, PB_3, PB_6);   // mosi, miso, sck, cs
-#elif defined (TARGET_NUCLEO_F411RE)
-UIPEthernetClass UIPEthernet(PB_5, PB_4, PB_3, PB_6);   // mosi, miso, sck, cs
+UIPEthernetClass    UIPEthernet(P0_9, P0_8, P1_29, P0_2);   // mosi, miso, sck, cs
+#elif defined(TARGET_NUCLEO_F103RB)
+UIPEthernetClass    UIPEthernet(PB_5, PB_4, PB_3, PB_6);    // mosi, miso, sck, cs
+#elif defined(TARGET_NUCLEO_F401RE)
+UIPEthernetClass    UIPEthernet(PB_5, PB_4, PB_3, PB_6);    // mosi, miso, sck, cs
+#elif defined(TARGET_NUCLEO_F411RE)
+UIPEthernetClass    UIPEthernet(PB_5, PB_4, PB_3, PB_6);    // mosi, miso, sck, cs
 
-// If your board/plaform is not present yet then uncomment the following two lines and replace TARGET_YOUR_BOARD as appropriate.
+// If your board/plaform is not present yet then uncomment
+// the following two lines and replace TARGET_YOUR_BOARD as appropriate.
 
-//#elif defined (TARGET_YOUR_BOARD)
-//UIPEthernetClass UIPEthernet(SPI_MOSI, SPI_MISO, SPI_SCK, SPI_CS);   // mosi, miso, sck, cs
+//#elif defined(TARGET_YOUR_BOARD)
+//UIPEthernetClass    UIPEthernet(SPI_MOSI, SPI_MISO, SPI_SCK, SPI_CS);   // mosi, miso, sck, cs
 
 #endif
 
 // Note:
 // If it happends that any of the SPI_MOSI, SPI_MISO, SPI_SCK, SPI_CS pins collide with LED1 pin
-// then either use different SPI port (if available on the board) and change the pin names in the constructor UIPEthernet(...) accordingly
-// or instead of using LED1 pin, select a free pin (not used by SPI port) and connect to it an external LED which is connected to a resitor that is connected to the groud.
+// then either use different SPI port (if available on the board) and change the pin names
+// in the constructor UIPEthernet(...) accordingly or instead of using LED1 pin, select
+// a free pin (not used by SPI port) and connect to it an external LED which is connected
+// to a 220 Ohm resitor that is connected to the groud.
 // In the second case remember to replace LED1 in sw(LED1) constructor (see below).
+// MAC number must be unique within the connected network. Modify as appropriate.
+const uint8_t       MY_MAC[6] = { 0x00, 0x01, 0x02, 0x03, 0x04, 0x06 };
 
-
-// MAC number must be unique within the connected network. Modify as appropriate.
-const uint8_t    MY_MAC[6] = {0x00,0x01,0x02,0x03,0x04,0x06};
 // IP address must be also unique and compatible with your network. Change as appropriate.
-const IPAddress  MY_IP(192,168,1,181);
-const uint16_t   MY_PORT = 80;      // for HTTP connection
-EthernetServer   myServer = EthernetServer(MY_PORT);
+const IPAddress     MY_IP(192, 168, 1, 181);
+const uint16_t      MY_PORT = 80;           // for HTTP connection
+EthernetServer      myServer = EthernetServer(MY_PORT);
+
 // In this example we are turning on/off LED1.
-DigitalOut       sw(LED1);  // Change LED1 to a pin of your choice. However, make sure that it does not collide with any of the SPI pins already used in the UIPEthernet(...) constructor above!
+DigitalOut          sw(LED1);               // Change LED1 to a pin of your choice.
 
-const string PASSWORD     = "secret";   // change as you like
-const string HTTP_OK      = "HTTP/1.0 200 OK";
-const string MOVED_PERM   = "HTTP/1.0 301 Moved Permanently\r\nLocation: ";
-const string UNAUTHORIZED = "HTTP/1.0 401 Unauthorized";
-string       httpHeader;     // HTTP header
-string       httpContent;    // HTTP content
-
+// However, make sure that it does not collide with any of the SPI pins
+// already used in the UIPEthernet(...) constructor above!
+const string        PASSWORD = "secret";    // change as you like
+const string        HTTP_OK = "HTTP/1.0 200 OK";
+const string        MOVED_PERM = "HTTP/1.0 301 Moved Permanently\r\nLocation: ";
+const string        UNAUTHORIZED = "HTTP/1.0 401 Unauthorized";
+string              httpHeader;     // HTTP header
+string              httpContent;    // HTTP content
 
 // analyse the url given
 // return values: -1 invalid password
@@ -71,9 +75,7 @@
 //                GET /password/ HTTP/1.....
 //                GET /password/?sw=1 HTTP/1.....
 //                GET /password/?sw=0 HTTP/1.....
-
-int8_t analyse_get_url(string& str)
-{
+int8_t analyse_get_url(string& str) {
     if(str.substr(5, PASSWORD.size()) != PASSWORD)
         return(-1);
 
@@ -87,7 +89,7 @@
 
     pos++;
 
-    string cmd(str.substr(pos, 5));
+    string  cmd(str.substr(pos, 5));
 
     if(cmd == "?sw=0")
         return(0);
@@ -98,26 +100,37 @@
     return(-3);
 }
 
-string& moved_perm(uint8_t flag)
-{
+/**
+ * @brief
+ * @note
+ * @param
+ * @retval
+ */
+string& moved_perm(uint8_t flag) {
     if(flag == 1)
-        httpContent = "/" +  PASSWORD + "/";
+        httpContent = "/" + PASSWORD + "/";
     else
         httpContent = "";
 
     httpContent += "<h1>301 Moved Permanently</h1>\r\n";
 
-    return (httpContent);
+    return(httpContent);
 }
 
-string& page(uint8_t status)
-{
+/**
+ * @brief
+ * @note
+ * @param
+ * @retval
+ */
+string& view(uint8_t status) {
     httpContent = "<h2>Web Switch</h2>\r\n";
 
     if(status == 1) {
         httpContent += "<pre>\r\n  <font color=#FF0000>ON</font>";
         httpContent += " <a href=\"./?sw=0\">[switch off]</a>\r\n";
-    } else {
+    }
+    else {
         httpContent += "<pre>\r\n  <font color=#00FF00>OFF</font>";
         httpContent += " <a href=\"./?sw=1\">[switch on]</a>\r\n";
     }
@@ -128,9 +141,14 @@
     return httpContent;
 }
 
-void http_send(EthernetClient& client, string& header, string& content)
-{
-    char content_length[5] = {};
+/**
+ * @brief
+ * @note
+ * @param
+ * @retval
+ */
+void http_send(EthernetClient& client, string& header, string& content) {
+    char    content_length[5] = { };
 
     header += "\r\nContent-Type: text/html\r\n";
     header += "Content-Length: ";
@@ -139,27 +157,31 @@
     header += "Pragma: no-cache\r\n";
     header += "Connection: About to close\r\n";
     header += "\r\n";
-    string webpage = header + content;
-    client.write((uint8_t*)webpage.c_str(),webpage.length());
+
+    string  webpage = header + content;
+    client.write((uint8_t*)webpage.c_str(), webpage.length());
 }
 
-int main()
-{
-    UIPEthernet.begin(MY_MAC,MY_IP);
+/**
+ * @brief
+ * @note
+ * @param
+ * @retval
+ */
+int main(void) {
+    UIPEthernet.begin(MY_MAC, MY_IP);
     myServer.begin();
     while(1) {
-        EthernetClient client = myServer.available();
-        if (client) {
-            size_t size = client.available();
+        EthernetClient  client = myServer.available();
+        if(client) {
+            size_t  size = client.available();
             if(size > 0) {
-                uint8_t* buf = (uint8_t*)malloc(size);
+                uint8_t*    buf = (uint8_t*)malloc(size);
                 size = client.read(buf, size);
-                string received((char*)buf);
+                string  received((char*)buf);
                 free(buf);
+                
                 if(received.substr(0, 3) != "GET") {
-                    // head, post or other method
-                    // for possible status codes see:
-                    // http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
                     httpHeader = HTTP_OK;
                     httpContent = "<h1>200 OK</h1>";
                     http_send(client, httpHeader, httpContent);
@@ -190,18 +212,16 @@
                 }
 
                 if(cmd == 1) {
-                    sw = 1;     // switch on
+                    sw = 1; // switch on
                 }
 
                 if(cmd == 0) {
-                    sw = 0;    // switch off
+                    sw = 0; // switch off
                 }
 
                 httpHeader = HTTP_OK;
-                http_send(client, httpHeader, page(sw));
+                http_send(client, httpHeader, view(sw));
             }
         }
     }
 }
-
-