main.c

W3100是WIZnet公司专门为以太网互联和嵌入式设备推出的硬件TCP／IP协议栈芯片

/*
********************************************************************************
* Wiznet.
* 5F Simmtech Bldg., 228-3, Nonhyun-dong, Kangnam-gu,
* Seoul, Korea
*
* (c) Copyright 2002, Wiznet, Seoul, Korea
*
* Filename : main.c
* Programmer(s): 
* Created : 2002/01/
* Modified :	Date - 2002/10/28
                Description - All file revision
			    - Use W3100A Driver ver 2.2
* Description : Simple HTTP Server Program
       This is a simple HTTP server program using well-known port #80 and service web page to user's web browser.
       This server program service only default.html.
       This default.html includes a form to control LCD and LED on EVB8051.
       If user enter some text in the form, the text will be shown on LCD.
       If user select LED ON/OFF control box, LEDs will be turn on/off on EVB8051.
       These functions are implemented by CGI. In this case, if there's CGI in request message from web browser,
       call the fucntion() and handle it. This way is different from normal CGI service that there's CGI file externally.

********************************************************************************
*/

/*
###############################################################################
Include Part
###############################################################################
*/
#include <reg51.h>			// 8051 SFR Definition
//#include <stdio.h>			// To use 'printf'
#include "serial.h"			// serial related functions
#include "socket.h"			// W3100A driver file
#include "httpd.h"			// http related functions
#include "lcd.h"    			// LCD
#include "at24c02.h"                    // EEPROM
#include "netconf.h"                    // Network Configuration
#include "sockutil.h"			// Useful function of W3100A

/*
###############################################################################
Define Part
###############################################################################
*/
#define	MAX_BUF_SIZE	2048		// Maximum buffer size of Rx buffer

/*
###############################################################################
Local  Variable Declaration Part
###############################################################################
*/
sfr  CKCON    	      = 0x8F;		// Definition of CKCON Register
u_char xdata * rx_buf = 0x7000;		// Position of Rx Buffer
u_char xdata * tx_buf = 0x7800;		// Position of Tx Buffer

/*
###############################################################################
Function Prototype Declaration Part
###############################################################################
*/
void Init8051();			// Initialize 8051 MCU
void init_sock(u_char i);		// Initialize designated channel
void InitNetConfig(void);		// Initialize Network Information

/*
###############################################################################
Function Implementation Part
###############################################################################
*/
/*
********************************************************************************
*              Main function for Web server
*
* Description: Initialize 8051 and W3100A.
*	       Transfer the appropriate web page by web page request and wait for the connection establishment from browser
* Arguments  : None.
* Returns    : None.
* Note       : 
********************************************************************************
*/
void main()
{
	SOCKET i;
	int len;
	u_char state;
	u_char type;

	Init8051();

	PutStringLn("\r\n-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-");
	PutString  (" Simple HTTP Server Program - Created Date : ");PutLTOA(0x20021105); PutStringLn("");
	PutStringLn("                            - Created By   : WIZnet, Inc.");
	PutStringLn("                            - W3100A Driver: V2.2(INDIRECT)");
	PutStringLn("                            - Flatform     : 8051 EVB V3.0");
	PutStringLn("-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-\r\n");
	InitLcd();									// Initialize LCD
	initW3100A();   		

	InitNetConfig();
	

	for (i = 0; i < MAX_SOCK_NUM; i++) init_sock(i);				// Initialize socket and Stay in wait mode for connection request

	while (1) 
	{
		i = 0;
		for (i = 0; i < MAX_SOCK_NUM; i++) 
		{
	       		state = select(i, SEL_CONTROL);					// Re-confirm socket status in connected state
			switch(state)                                                   // In this simple HTTP server of EVB8051, service only HTML document
			{
			case SOCK_ESTABLISHED :
			     	if ((len = select(i, SEL_RECV)) > 0) 	       		// Confirm if received data 
			     	{
			     		if (len > MAX_BUF_SIZE)	len = MAX_BUF_SIZE;	// When received data more than system buffer, handle as size as buffer.
					len = recv(i, rx_buf, len);
					type = ParseReq(rx_buf);			// Analyze request
					len = PrintHeader(tx_buf, type);		// Make HTTP Response Header

					switch (type) 					// Transfer web page as for each request	
					{ 
						case 'g':				// gif processing
							       				// ADD TO YOUR CODE
							//break;
       						case 'j':				// jpeg processing
											// ADD TO YOUR CODE
                                                    	//break; 
       						case 'h':				// HTML 
											// ADD TO YOUR CODE
							//break;
						case 'a':       			// Any Type
							//break; 
						case 'c':				// In case of CGI - CGI, it is processed already by ParseReq().
							len += DoHTML(tx_buf + len);    // Make HTML BODY
							len = send(i, tx_buf, len);     // SEND WEB PAGE
							break;
					}
				}
				break;
			case SOCK_CLOSE_WAIT :						// Terminate connection
				//printf("CLOSE_WAIT : %bd\r\n", i);
				PutHTOA(i); PutStringLn(" : CLOSE_WAIT");
				close(i); 						// SOCKET CLOSE
				break;
			case SOCK_CLOSED :						// Close conneciton
				//printf("CLOSED : %bd\r\n", i);
				PutHTOA(i);PutStringLn(" : CLOSED");
				init_sock(i);						
				break;
			}
		}	// for
	} // while 
}

/*
********************************************************************************
*              8051 Initialization Function
*
* Description: 
* Arguments  : None.
* Returns    : None.
* Note       : 
********************************************************************************
*/
void Init8051(void)
{ 
	EA = 0; 		// Disable all interrupt
	CKCON = 0x01;		// X2 mode
	IT0 = 0;		// interrupt level trigger
	EX0 = 1;		// INT 0 enable
	EX1 = 0; 		// INT 1 disable
	EA = 1; 		// Enable to all interrupt
	InitSerial();		// Initialize serial port (Refer to serial.c)
	wait_10ms(1);
}

/*
********************************************************************************
*              Re-initialization function for the disconnected channel.
*
* Description: Close and re-initialize for the disconnected channel.
* Arguments  : None.
* Returns    : None.
* Note       : 
********************************************************************************
*/
void init_sock(u_char i) 
{
//	printf("socket : ");
	PutString("socket : ");	
	socket(i, SOCK_STREAM, 80, 0);		// Create socket
//	printf("%bd ok\r\n",i);
	PutHTOA(i);PutStringLn("");

//	printf("listen : ");
	PutString("listen : ");
	NBlisten(i);           			// Server Mode
//	printf("%bd ok..\r\n", i);
	PutHTOA(i);PutStringLn("");
}


/*
********************************************************************************
* Description: Setup network information ( Source IP, G/W, S/N, MAC Address)
* Arguments  : None.
* Returns    : None.
* Note       : 
********************************************************************************
*/
void InitNetConfig(void)
{
	int i, j;
	char c;
	un_l2cval tip;
	u_char xdata ip[6];  	       		// Variable to setup network information
	u_char xdata ipstr[16];
	if(!Check_EEPROM())
	{
		ip[0] = 0x00; ip[1] = 0x01; ip[2] = 0x02; ip[3] = 0x03; ip[4] = 0x04; ip[5] = 0x05;     // ETC.
		setMACAddr(ip);		// Setup MAC
		ip[0] = 192; ip[1] = 168; ip[2] = 0; ip[3] = 2;	// VPN Env.						
		setIP(ip);		// Setup source IP
		ip[3] = 1;		// VPN , Develope Env.
		setgateway(ip);		// Setup gateway address
		ip[0] = 255; ip[1] = 255; ip[2] = 255; ip[3] = 0;
		setsubmask(ip);		// Setup subnet mask
	}
	else
	{
		ClrScr();
		GotoXY(0,0);
		Puts(" < NET CONFIG > ");
		T0 = 0;
		T1 = 1;

		EEP_ReadBytes(GIPADDR,tip.cVal,4);         // If IP address wasn't set up in EEPROM, setup initial network configuration.
		if(tip.lVal == 0 || tip.lVal == (0-1))     // If Gateway Address is 00.00.00.00 or ff.ff.ff.ff
		{       			
			PutString("Setting Initial Network Configuration ...");PutStringLn("");PutStringLn(""); 
			ip[0] = 0x00; ip[1] = 0x08; ip[2] = 0xDC; ip[3] = 0x00; ip[4] = 0x00; ip[5] = 0x00;     // etc.
			setMACAddr(ip);		// Setup MAC
			ip[0] = 192; ip[1] = 168; ip[2] = 0; ip[3] = 2;		// VPN Env.						
			setIP(ip);		// Setup source IP
			ip[3] = 1;		// VPN , Develope Env.
			setgateway(ip);		// Setup gateway address
			ip[0] = 255; ip[1] = 255; ip[2] = 255; ip[3] = 0;
			setsubmask(ip);
			Config_Save('A');
		}

		PutString("Press 'C' Key To Update Network Configuration");
		GotoXY(0,1);
		for(i = 0; i < 16; i++)
		{
			for( j = 0 ; j < 50 ; j++)
			{
				if(IsPressedKey() == 1)
				{
					c = GetByte();PutStringLn("");
					if(c == 'C' || c == 'c')
					{
						Configure();
						c = '*';
						break;
					}
					else if(c== 0x1B)	// Escape character
					{
						c = '*';
						break;
					}
				}
				wait_1ms(2);
			}
			if(c == '*') break;
			T0 = !T0;			    	// LED TOGGLE
			T1 = !T1;
			Putch(0xFF);
			PutByte('.');
		}
		PutStringLn("");
		Config_Load();
	}
	GetNetConfig();						// Display network information
	sysinit(0x55,0x55);
	ClrScr();
	GotoXY(0,0);
	Puts("SIMPLE WEBSERVER");
	GotoXY(1,1);
	GetIPAddress(ip);
	inet_ntoa(ip,ipstr);					// Output IP Address on LCD
	Puts(ipstr);
	T0 = 0;							// LED0 ON 
	T1 = 0;							// LED1 ON 
}