On Thursday 06 April 2006 19:04, Robert L Cochran wrote: > I'm trying to use minicom on Fedora Core 4 to speak to a PIC18F452 chip > which contains a preloaded version of the Microchip TCP/IP stack. I > built the device myself from a kit; it is intended to be a small web > server. My objective is to assign an IP address to the RTL9019AS > ethernet controller. This can be accomplished over a setup menu that > appears in the minicom window. I suspect I have incorrect minicom settings. > > Serial device -- /dev/TTYS0 connected to development board Max232 chip > > setup for 19200 bps,8N1, software flow control, VT102 emulation > > iptables service is stopped > > When I connect, the setup program appears. It is just a menu with 8 > choices. In fact, the setup menu sometimes displays itself twice. > > I select an option say 2 to set the IP address. The device very > sensibily responds with the default ip address. I type in a new IP > address to reflect my actual network. > > If I try to select 2 to check the default IP address, it again sensibly > responds with the new IP address that I just gave it. So far, so good. > > Then I select the option to save the new IP address. a message is > returned which is usually the new IP address itself. > > Attempts to ping that IP address fail. > > Then I start the setup menu again in a new minicom window. The original > -- default -- IP address appears. > > So it seems like the option to save the IP address isn't working right. > Things are apparently lost when I restart the device. > > Is this a minicom software issue, or is it bad soldering on my part with > the actual device being tested? I'm quite willing to agree it may have > soldering issues. > > Thanks > > Bob Cochran Is the IP address stored in an eeprom or a battery buffered ram? If the answer is eeprom, check your power supply. You need 2 different voltages to read and write to an eeprom. So its possible that on startup the firmware copies the IP into ram - that's where you modify it. It is actually not written back to the prom, so the next time you power on, you go back to the default IP... I doubt it has anything to do with minicom unless the display issue keeps you from seeing a "save" menu entry that you'd have to execute... Peter.
