The best way to test serial ports under Linux (or any other OS) is to make a loopback device. This is a fancy name for a short length of wire that short the Rx and Tx pins. You should then be able to read back every byte you send. It loopback fails then you know the promlem is at your end and not the cable or the other computer.
If the port is not even showing up in the /dev tree than I wonder if the hardware is enabled. Raspberry Pis have much hardware disabled by default so the drivers don't load and take up space. Many PC have serial disabled in BIOS for the same reason. On Mon, Jun 3, 2019 at 10:26 AM Gene Heskett <[email protected]> wrote: > On Monday 03 June 2019 01:02:23 pm Greg Bernard wrote: > > > Have you thouht of using a USB to serial adapter? > > https://www.amazon.com/TRENDnet-Converter-Installation-Universal-TU-S9 > >/dp/B0007T27H8 > > > Yes and no Greg. They are all db9's and this sniffer is db25. I have the > fdti cables, but not a spare 9 to 25. > > I'm more concerned that this testing's java is way to new. > > > On Mon, Jun 3, 2019 at 11:43 AM Gene Heskett <[email protected]> > wrote: > > > Greetings all; > > > > > > One of the things I occasionally do is run a couple programs to > > > talkto a trs-80 computer running in the basement, which has 3 serial > > > ports on it, and the one that works with drivewire is the bitbanger, > > > running at about 155 kilobaud. drivewire is written in java and > > > apparently the java is too new. > > > > > > So the next thing is to run minicom, and see if it will talk to a > > > hardware serial port whose top speed is 9600 baud. I have one of > > > those 232 line testers with a slew of colored leds, which are all on > > > in one color or the other, but I can't get minicom to blink any of > > > them. So I look next with lsmod, no serial module. > > > > > > Is there any other way I can make the db9 port on this mobo work? > > > > > > Thanks all; > > > > > > Cheers, Gene Heskett > > > -- > > > "There are four boxes to be used in defense of liberty: > > > soap, ballot, jury, and ammo. Please use in that order." > > > -Ed Howdershelt (Author) > > > Genes Web page <http://geneslinuxbox.net:6309/gene> > > > > > > > > > > > > _______________________________________________ > > > Emc-users mailing list > > > [email protected] > > > https://lists.sourceforge.net/lists/listinfo/emc-users > > > Cheers, Gene Heskett > -- > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author) > Genes Web page <http://geneslinuxbox.net:6309/gene> > > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Chris Albertson Redondo Beach, California _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
