STR71X PORT with lwIP/PPP
REQUIREMENTS
============
The FreeModbus/lwIP port requires are port of the lwIP TCP/IP stack for
the target platform. This port includes a PPP driver for lwIP together
with suitable drivers for the serial interfaces of the STR71x device.
The development environment used is Rowley Crossworks 1.5 for ARM but as
they use the GNU compilers any other environment should work too. The
hardware used is STR-P711 [1] development board from Olimex.
[1] ... STR-P711: http://www.olimex.com/dev/str-p711.html
USAGE
=====
Simply compile the software with the Rowley compilers and download it to
the target. The provided configuration "Flash Debug" and "Flash Release"
should work out of the box. The first UART of the STR711 device is used
as stdout where debug messages are sent to. You should connect this one
to a simple terminal program. The second UART is used for the PPP conn-
ection. You must setup a PPP server on this line. Example for Linux can
be found in the utils directory together with a startup script to start
the server. Remember to replace ttyS0 with the line you have connected
the second UART to.
By default the port using the following settings:
IP Address (STR71X) : 10.0.10.2
IP Address (HOST) : 10.0.10.1
Modbus TCP Port : 502
If you have configured everything correctly you should see the following
output from your local PPP daemon.
----------------------- start /var/log/messages output ----------------------
Sep 4 21:12:40 pcno-4 pppd[22597]: pppd 2.4.2 started by root, uid 0
Sep 4 21:12:40 pcno-4 pppd[22597]: Using interface ppp0
Sep 4 21:12:40 pcno-4 pppd[22597]: Connect: ppp0 <--> /dev/ttyS0
Sep 4 21:12:44 pcno-4 pppd[22597]: found interface eth0 for proxy arp
Sep 4 21:12:44 pcno-4 pppd[22597]: local IP address 10.0.10.1
Sep 4 21:12:44 pcno-4 pppd[22597]: remote IP address 10.0.10.2
----------------------- end /var/log/messages output ------------------------
The output from the debug console received by the target should match:
----------------------- start console output --------------------------------
ERROR: PPP: new PPP connection established
ERROR: PPP: our IP address = 10.0.10.2
ERROR: PPP: his IP address = 10.0.10.1
ERROR: PPP: netmask = 255.255.255.0
DEBUG: MBTCP-ACCEPT: Accepted new client 10.0.10.1
DEBUG: MBTCP-RECV: | TID = 0000 | PID = 0000 | LEN = 0006 | UID = 01||
FUNC = 04 | DATA = 03E70002 |
DEBUG: MBTCP-SENT: | TID = 0000 | PID = 0000 | LEN = 0007 | UID = 01||
FUNC = 04 | DATA = 04AC610001 |
DEBUG: MBTCP-RECV: | TID = 0000 | PID = 0000 | LEN = 0006 | UID = 01||
FUNC = 04 | DATA = 03E70002 |
DEBUG: MBTCP-SENT: | TID = 0000 | PID = 0000 | LEN = 0007 | UID = 01||
FUNC = 04 | DATA = 04B0420001 |
----------------------- end console output ----------------------------------
$Id: README.txt,v 1.1 2006/09/04 19:33:58 wolti Exp $
STR71X + lwIP/PPP port - Copyright (c) 2006 Christian Walter.
