13 messages in net.java.dev.jna.usersRe: [jna-users] handling serial port ...
FromSent OnAttachments
zamekMar 11, 2008 11:58 am 
Marc RavensbergenMar 11, 2008 12:24 pm 
zamekMar 11, 2008 1:47 pm 
Timothy WallMar 12, 2008 5:38 am 
zamekMar 12, 2008 2:34 pm 
Timothy WallMar 12, 2008 4:36 pm 
zamekMar 13, 2008 1:12 pm 
Timothy WallMar 13, 2008 5:04 pm.java
zamekMar 14, 2008 7:26 am 
Timothy WallMar 14, 2008 8:20 am 
zamekMar 14, 2008 8:51 am 
Timothy WallMar 17, 2008 6:58 am 
zamekMar 17, 2008 11:22 am 
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Subject:Re: [jna-users] handling serial port with jan on linuxActions...
From:zamek (zam@vili.pmmf.hu)
Date:Mar 11, 2008 1:47:00 pm
List:net.java.dev.jna.users

hi,

Ezzel a dátummal: Tuesday 11 March 2008 20.25.13 Marc Ravensbergen ezt írta:

Hi, any reason you wouldn't use something like rxtx, which is basically serial communications for java?

I need to communicate a microcontroller based device which send/receive 96 bytes packages with 921kb/sec at every 5mS. All are ok, but there is an 5 mS latency between the first character of package and data_available signal.

I tested it with an oscilloscope, first channel was in Rxd, and second channel in RTS. When I got data available signal I set/reset rts. This latency was 5-25mS, but if I tried Molnar Ingo's reat time linux patch, it stabilized to 5mS. And when I tried it in native c based on http://www.comptechdoc.org/os/linux/programming/c/linux_pgcserial.html this latency reduced to 50uS!

I would like to test it with jna.

--  thx,  ----------------------------------  Zoltan Zidarics programmer  PTE-PMMFK H-7621 Pecs, Boszorkany u. 2. Hungary  E-Mail: zam@vili.pmmf.hu  ----------------------------------