/****************************************************************** *****                                                        ***** *****  Name: easyweb.c                                       ***** *****  Ver.: 1.0                                             ***** *****  Date: 07/05/2001                                      ***** *****  Auth: Andreas Dannenberg                              ***** *****        HTWK Leipzig                                    ***** *****        university of applied sciences                  ***** *****        Germany                                         ***** *****  Func: implements a dynamic HTTP-server by using       ***** *****        the easyWEB-API                                 ***** *****                                                        ***** ******************************************************************/#define extern            // Keil: Line added for modular project management#include "stdlib.h"#include "stdio.h"#include "string.h"#include "easyweb.h"#include "LAN91C111.h"    // Keil: *.c -> *.h    // ethernet packet driver#include "tcpip.h"        // Keil: *.c -> *.h    // easyWEB TCP/IP stack#include <LPC22xx.h>      // Keil: Register definition file for LPC2294#include "webpage.h"                             // webside for our HTTP server (HTML)
void main(void){//InitOsc();              // Keil: No oscillator initialization necessary at this time.//InitPorts();			  // Keil: No port initialization necessary at this time.  TCPLowLevelInit();/*  *(unsigned char *)RemoteIP = 24;               // uncomment those lines to get the  *((unsigned char *)RemoteIP + 1) = 8;          // quote of the day from a real  *((unsigned char *)RemoteIP + 2) = 69;         // internet server! (gateway must be  *((unsigned char *)RemoteIP + 3) = 7;          // set to your LAN-router)  TCPLocalPort = 2025;  TCPRemotePort = TCP_PORT_QOTD;  TCPActiveOpen();  while (SocketStatus & SOCK_ACTIVE)             // read the quote from memory  {                                              // by using the hardware-debugger    DoNetworkStuff();  }*/  HTTPStatus = 0;                                // clear HTTP-server's flag register  TCPLocalPort = TCP_PORT_HTTP;                  // set port we want to listen to    while (1)                                      // repeat forever  {    if (!(SocketStatus & SOCK_ACTIVE)) TCPPassiveOpen();   // listen for incoming TCP-connection    DoNetworkStuff();                                      // handle network and easyWEB-stack                                                           // events    HTTPServer();  }}// This function implements a very simple dynamic HTTP-server.// It waits until connected, then sends a HTTP-header and the// HTML-code stored in memory. Before sending, it replaces// some special strings with dynamic values.// NOTE: For strings crossing page boundaries, replacing will// not work. In this case, simply add some extra lines// (e.g. CR and LFs) to the HTML-code.void HTTPServer(void){  if (SocketStatus & SOCK_CONNECTED)             // check if somebody has connected to our TCP  {    if (SocketStatus & SOCK_DATA_AVAILABLE)      // check if remote TCP sent data      TCPReleaseRxBuffer();                      // and throw it away    if (SocketStatus & SOCK_TX_BUF_RELEASED)     // check if buffer is free for TX    {      if (!(HTTPStatus & HTTP_SEND_PAGE))        // init byte-counter and pointer to webside      {                                          // if called the 1st time        HTTPBytesToSend = sizeof(WebSide) - 1;   // get HTML length, ignore trailing zero        PWebSide = (unsigned char *)WebSide;     // pointer to HTML-code      }      if (HTTPBytesToSend > MAX_TCP_TX_DATA_SIZE)     // transmit a segment of MAX_SIZE      {        if (!(HTTPStatus & HTTP_SEND_PAGE))           // 1st time, include HTTP-header        {          memcpy(TCP_TX_BUF, GetResponse, sizeof(GetResponse) - 1);          memcpy(TCP_TX_BUF + sizeof(GetResponse) - 1, PWebSide, MAX_TCP_TX_DATA_SIZE - sizeof(GetResponse) + 1);          HTTPBytesToSend -= MAX_TCP_TX_DATA_SIZE - sizeof(GetResponse) + 1;          PWebSide += MAX_TCP_TX_DATA_SIZE - sizeof(GetResponse) + 1;        }        else        {          memcpy(TCP_TX_BUF, PWebSide, MAX_TCP_TX_DATA_SIZE);          HTTPBytesToSend -= MAX_TCP_TX_DATA_SIZE;          PWebSide += MAX_TCP_TX_DATA_SIZE;        }                  TCPTxDataCount = MAX_TCP_TX_DATA_SIZE;   // bytes to xfer        InsertDynamicValues();                   // exchange some strings...        TCPTransmitTxBuffer();                   // xfer buffer      }      else if (HTTPBytesToSend)                  // transmit leftover bytes      {        memcpy(TCP_TX_BUF, PWebSide, HTTPBytesToSend);        TCPTxDataCount = HTTPBytesToSend;        // bytes to xfer        InsertDynamicValues();                   // exchange some strings...        TCPTransmitTxBuffer();                   // send last segment        TCPClose();                              // and close connection        HTTPBytesToSend = 0;                     // all data sent      }      HTTPStatus |= HTTP_SEND_PAGE;              // ok, 1st loop executed    }  }  else    HTTPStatus &= ~HTTP_SEND_PAGE;               // reset help-flag if not connected}// samples and returns the AD-converter value of channel 0unsigned int GetAD7Val(void){// Keil: function replaced to handle LPC2294 A/D converter.  unsigned int val;
  ADCR  = 0x01000001 | 0x002E0400;       // Setup A/D: 10-bit AIN0 @ 3MHz
  do {
    val = ADDR;                          // Read A/D Data Register
  } while ((val & 0x80000000) == 0);     // Wait for end of A/D Conversion
  ADCR &= ~0x01000001;                   // Stop A/D Conversion
  val = (val >> 6) & 0x03FF;             // Extract AIN0 Value
  return(val / 11);                      // result of A/D process }// samples and returns AD-converter value of channel 1unsigned int GetTempVal(void){// Keil: function replaced to handle LPC2294 A/D converter.  unsigned int val;
  ADCR  = 0x01000002 | 0x002E0400;       // Setup A/D: 10-bit AIN1 @ 3MHz
  do {
    val = ADDR;                          // Read A/D Data Register
  } while ((val & 0x80000000) == 0);     // Wait for end of A/D Conversion
  ADCR &= ~0x01000002;                   // Stop A/D Conversion
  val = (val >> 6) & 0x03FF;             // Extract AIN1 Value
  return(val / 11);                      // result of A/D process }// searches the TX-buffer for special strings and replaces them// with dynamic values (AD-converter results)void InsertDynamicValues(void){  unsigned char *Key;  unsigned char NewKey[5];  unsigned int i;    if (TCPTxDataCount < 4) return;                     // there can't be any special string    Key = TCP_TX_BUF;    for (i = 0; i < (TCPTxDataCount - 3); i++)  {    if (*Key == 'A')     if (*(Key + 1) == 'D')       if (*(Key + 3) == '%')         switch (*(Key + 2))         {           case '7' :                                 // "AD7%"?           {             sprintf(NewKey, "%3u", GetAD7Val());     // insert AD converter value             memcpy(Key, NewKey, 3);                  // channel 7 (P6.7)             break;           }           case 'A' :                                 // "ADA%"?           {             sprintf(NewKey, "%3u", GetTempVal());    // insert AD converter value             memcpy(Key, NewKey, 3);                  // channel 10 (temp.-diode)             break;           }         }    Key++;  }}