Re: [CentOS] For you old-timers, an RS232 question about data rate confirmation.

2009-09-01 Thread nate
Barry L. Kline wrote: > I used dd to create the file I'm sending, so that every test is starting > with the same data and length. How about writing it directly to the device? dd if=source of=/dev/ttyr00 (if that's the device? I forgot) similar to using cat though if it matters you could play wi

Re: [CentOS] For you old-timers, an RS232 question about data rate confirmation.

2009-09-01 Thread Barry L. Kline
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 John R Pierce wrote: > I'd replace /dev/null with large_file_copy, then run md5sum on both to > confirm things are working reliably. John Nice tweak! Thanks -- I'll make that change. Barry -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.5 (GNU/

Re: [CentOS] For you old-timers, an RS232 question about data rate confirmation.

2009-09-01 Thread Barry L. Kline
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 nate wrote: > Barry L. Kline wrote: > >> Short of writing my own program, can anyone point me to a good tool for >> that purpose. yum search RS232 and yum search serial haven't provided >> what I'm looking for and I can't imagine that this isn't alr

Re: [CentOS] For you old-timers, an RS232 question about data rate confirmation.

2009-09-01 Thread Stephen Harris
On Tue, Sep 01, 2009 at 01:33:44PM -0700, John R Pierce wrote: > Stephen Harris wrote: > > cat /dev/null & > > time cat large_file > /dev/ttyr00 > > > > I'd replace /dev/null with large_file_copy, then run md5sum on both to > confirm things are working reliably. That's the second step :-

Re: [CentOS] For you old-timers, an RS232 question about data rate confirmation.

2009-09-01 Thread Barry L. Kline
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 R P Herrold wrote: > As I understand the problem it may be that the signal could > degrade from whatever max data rate the circuit is rated for. > I am not aware of a resampling routine in any recent kit that > CentOS ships Hi Russ. This RF-WAN i

Re: [CentOS] For you old-timers, an RS232 question about data rate confirmation.

2009-09-01 Thread John R Pierce
Stephen Harris wrote: > On Tue, Sep 01, 2009 at 03:38:23PM -0400, Barry L. Kline wrote: > >> the end of the device. I am able to confirm that it works fine with >> minicom, but I'd like to be able to have a program read/write the device >> with a largish file and give me a throughput rating. >>

Re: [CentOS] For you old-timers, an RS232 question about data rate confirmation.

2009-09-01 Thread Barry L. Kline
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Stephen Harris wrote: > Since you have loopback adapter connected you need to read/write from > the device at the same time. So... first attempt: > cat /dev/null & > time cat large_file > /dev/ttyr00 > > Been a long time since I played with se

Re: [CentOS] For you old-timers, an RS232 question about data rate confirmation.

2009-09-01 Thread nate
Barry L. Kline wrote: > Short of writing my own program, can anyone point me to a good tool for > that purpose. yum search RS232 and yum search serial haven't provided > what I'm looking for and I can't imagine that this isn't already done. For writing have you tried dd ? nate ___

[CentOS] For you old-timers, an RS232 question about data rate confirmation.

2009-09-01 Thread R P Herrold
On Tue, 1 Sep 2009, Barry L. Kline wrote: > Short of writing my own program, can anyone point me to a good tool for > that purpose. yum search RS232 and yum search serial haven't provided > what I'm looking for and I can't imagine that this isn't already done. Are the Kansas City cassette tape

Re: [CentOS] For you old-timers, an RS232 question about data rate confirmation.

2009-09-01 Thread Stephen Harris
On Tue, Sep 01, 2009 at 03:38:23PM -0400, Barry L. Kline wrote: > the end of the device. I am able to confirm that it works fine with > minicom, but I'd like to be able to have a program read/write the device > with a largish file and give me a throughput rating. Since you have loopback adapter c

[CentOS] For you old-timers, an RS232 question about data rate confirmation.

2009-09-01 Thread Barry L. Kline
Hello all. This is a question that I should be able to answer, but the old grey cells aren't working. My Google-Fu must not be up to snuff, either. I have a MOXA IP-RS232 converter that I'm going to be using over an RF WAN and I need to confirm the actual data rate that I'll be able to achieve.