Web 51 - "Telnet" Setup

Example application that transports data from the serial line over TCP/IP. Uses a higher version of the libary that supports serial line, "telnet" client and http server. Result is a WWW-configurable ETHERNET-RS232 converter that implements full TCP/IP.

Related Web51 docs

Serial line support - describes settings and memory operations for the serial line.

Link order, libraries - explains basic differences in the libraries used.

Library LIBK - kernel modules (kernel lib).

Library LIBW - arithmetic, logic, I/O, ... functions.

Configuration of the "telnet" server Web 51, shown in the "serial" example, can be displayed and changed with CGI scripts. In the described configuration, several html pages and scripts are stored in the CPU; some of them are in EEPROM, some in FLASH.

index.html

Server root page, index.html, displays the configuration.

Source html page stored in Web 51
(Note: " · " represents non-printable binary parameters of CGI procedures)

<html><meta http-equiv="Cache-Control" content="no-cache">
<title>89C8252 WWW server</title>
<body><center><H1>AT89C8252 WWW server</H1>
Welcome in server Web 51<br>
running on the AT89S8252 single-chip Microcontroller and RTL8019AS Ethernet Controller.<br>
MAC: 'mac.cgi' IP: 'ip.cgi?· MASK: 'ip.cgi?· GW: 'ip.cgi?·<br>
COM: 'bd.cgi?·00,N,8,1 Flow Control: XON/XOFF <B>'?xon.cgi?·off{on}</B> RTS/CTS <B>'?rts.cgi?·off{on}</B> POINT: 'ip.cgi?·
</center></body></html>

Expanded html page as sent by the Web 51 server

<html><meta http-equiv="Cache-Control" content="no-cache">
<title>89C8252 WWW server</title>
<body><center><H1>AT89C8252 WWW server</H1>
Welcome in server Web 51<br>
running on the AT89S8252 single-chip Microcontroller and RTL8019AS Ethernet Controller.<br>
MAC: 00-00-E8-EE-09-F5 IP: 192.168.0.77 MASK: 255.255.255.0 GW: 192.168.0.253<br>
COM: 38400,N,8,1 Flow Control: XON/XOFF <B>off</B> RTS/CTS <B>on</B> POINT: 0.0.0.0
</center></body></html>

This is what the user will see:

AT89C8252 WWW server
Welcome in server Web 51
running on the AT89S8252 single-chip Microcontroller and RTL8019AS Ethernet Controller.
MAC: 00-00-E8-EE-09-F5 IP: 192.168.0.77 MASK: 255.255.255.0 GW: 192.168.0.253
COM: 38400,N,8,1 Flow Control: XON/XOFF off RTS/CTS on POINT: 0.0.0.0

config.html

The config.html page allows the configuration to be changed.

Source page stored in Web 51:
(Note: " · " represents non-printable binary parameters of CGI procedures)

<html><meta http-equiv="Cache-Control" content="no-cache"><head>
<title>89C8252 WWW config</title></head>
<body><form action="/setup.html" method="GET"><input type="password" name="W">Password<br>
Protocol:<input type="radio" name="P" value=0'fl.cgi?0>None
 <input type="radio" name="P" value=2'fl.cgi?2>Xon/Xoff
 <input type="radio" name="P" value=1'fl.cgi?1>RTS/CTS<br>
<select name="B" size="1">
 <option value=7'bdc.cgi?7>600 Bd</option>
 <option value=6'bdc.cgi?6>1200 Bd</option>
 <option value=5'bdc.cgi?5>2400 Bd</option>
 <option value=4'bdc.cgi?4>4800 Bd</option>
 <option value=3'bdc.cgi?3>9600 Bd</option>
 <option value=2'bdc.cgi?2>19200 Bd</option>
 <option value=1'bdc.cgi?1>38400 Bd</option>
</select>COM speed<br>
<input type="text" name="I" value="'ip.cgi?·">IP Address<br>
<input type="text" name="M" value="'ip.cgi?·">IP Mask<br>
<input type="text" name="G" value="'ip.cgi?·">IP Gateway<br>
<input type="text" name="T" value="'ip.cgi?·">Send to IP (0.0.0.0 - PASIVE mode)<br>
<input type="submit" value="Send"></form></body></html>

Expanded html page as sent by the Web 51 server:

<html><meta http-equiv="Cache-Control" content="no-cache"><head>
<title>89C8252 WWW config</title></head>
<body><form action="/setup.html" method="GET"><input type="password" name="W">Password<br>
Protocol:<input type="radio" name="P" value=0>None
 <input type="radio" name="P" value=2>Xon/Xoff
 <input type="radio" name="P" value=1 CHECKED>RTS/CTS<br>
<select name="B" size="1">
 <option value=7>600 Bd</option>
 <option value=6>1200 Bd</option>
 <option value=5>2400 Bd</option>
 <option value=4>4800 Bd</option>
 <option value=3>9600 Bd</option>
 <option value=2>19200 Bd</option>
 <option value=1 SELECTED>38400 Bd</option>
</select>COM speed<br>
<input type="text" name="I" value="192.168.0.77">IP Address<br>
<input type="text" name="M" value="255.255.255.0">IP Mask<br>
<input type="text" name="G" value="192.168.0.253">IP Gateway<br>
<input type="text" name="T" value="0.0.0.0">Send to IP (0.0.0.0 - PASIVE mode)<br>
<input type="submit" value="Send"></form></body></html>

This is what the user will see:
Password
Protocol:None Xon/Xoff RTS/CTS
COM speed
IP Address
IP Mask
IP Gateway
Send to IP (0.0.0.0 - PASIVE mode)

setup.html

setup.html allows switching between the default and the generated profile.

Source page stored in Web 51:
(Note: " · " represents non-printable binary parameters of CGI procedures)

<html><meta http-equiv="Cache-Control" content="no-cache">
<title>89C8252 WWW setup</title><body>
<center><H1>AT89C8252 WWW server</H1><br>
'ipsetup.cgi'MAC: 'mac.cgi'<br>
<b>Current config:</b><br>
IP: 'ip.cgi?· MASK: 'ip.cgi?· GW: 'ip.cgi?· POINT: 'ip.cgi?·<br>
COM: 'bd.cgi?·00,N,8,1 Flow Control: XON/XOFF <B>'?xon.cgi?·off{on}</B> RTS/CTS <B>'?rts.cgi?·off{on}</B><br>
<b>New config:</b><br>
IP: 'ip.cgi?· MASK: 'ip.cgi?· GW: 'ip.cgi?· POINT: 'ip.cgi?·<br>
COM: 'bd.cgi?·00,N,8,1 Flow Control: XON/XOFF <B>'?xon.cgi?·off{on}</B> RTS/CTS <B>'?rts.cgi?·off{on}</B><br>
<b>Default config:</b><br>
IP: 'ip.cgi?· MASK: 'ip.cgi?· GW: 'ip.cgi?· POINT: 'ip.cgi?·<br>
COM: 'bd.cgi?·00,N,8,1 Flow Control: XON/XOFF <B>'?xon.cgi?·off{on}</B> RTS/CTS <B>'?rts.cgi?·off{on}</B>
<form action="setup.html" method="GET"><b>Entry Password for change:</b> <input type="password" name="W"><br>
<input type="submit" name="E" value="New->Current"><input type="submit" name="E" value="Default->Current"><br>
<a href="/"><b>Exit</b></a></form></center></body></html>

Expanded html page as sent by the Web 51 server:

<html><meta http-equiv="Cache-Control" content="no-cache">
<title>89C8252 WWW setup</title><body><center><H1>AT89C8252 WWW server</H1><br>
MAC: 00-00-E8-EE-09-F5<br>
<b>Current config:</b><br>
IP: 192.168.0.77 MASK: 255.255.255.0 GW: 192.168.0.253 POINT: 0.0.0.0<br>
COM: 38400,N,8,1 Flow Control: XON/XOFF <B>off</B> RTS/CTS <B>on</B><br>
<b>New config:</b><br>
IP: 192.168.0.77 MASK: 255.255.255.0 GW: 192.168.0.253 POINT: 0.0.0.0<br>
COM: 38400,N,8,1 Flow Control: XON/XOFF <B>off</B> RTS/CTS <B>on</B><br>
<b>Default config:</b><br>
IP: 192.168.0.77 MASK: 255.255.255.0 GW: 192.168.0.253 POINT: 0.0.0.0<br>
COM: 38400,N,8,1 Flow Control: XON/XOFF <B>off</B> RTS/CTS <B>on</B>
<form action="setup.html" method="GET"><b>Entry Password for change:</b> <input type="password" name="W"><br>
<input type="submit" name="E" value="New->Current"><input type="submit" name="E" value="Default->Current"><br>
<a href="/"><b>Exit</b></a></form></center></body></html>

This is what the user will see:
AT89C8252 WWW server

MAC: 00-00-E8-EE-09-F5
Current config:
IP: 192.168.0.77 MASK: 255.255.255.0 GW: 192.168.0.253 POINT: 0.0.0.0
COM: 38400,N,8,1 Flow Control: XON/XOFF off RTS/CTS on
New config:
IP: 192.168.0.77 MASK: 255.255.255.0 GW: 192.168.0.253 POINT: 0.0.0.0
COM: 38400,N,8,1 Flow Control: XON/XOFF off RTS/CTS on
Default config:
IP: 192.168.0.77 MASK: 255.255.255.0 GW: 192.168.0.253 POINT: 0.0.0.0
COM: 38400,N,8,1 Flow Control: XON/XOFF off RTS/CTS on
Entry Password for change:

Exit

Password for configuration changes is stored in passwd.asm in the password: definition.
(For the inpatient ones: this example uses 1234.)