Hello, I am observing weird behaviors and I couldn't pin down at which level things are going bad. Using instrument-control 0.1.0 from Forge. Running Ubuntu 12.04 64 bit Linux 3.2.0-32-generic #51-Ubuntu SMP Wed Sep 26 21:33:09 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
I am using serial communications. I am testing with a physical loopback (RxD connected to TxD) in this USB2Serial adapter https://www.sparkfun.com/products/718. Problem 1 [Ring bufffer?]: s = serial (); # 8-N-1 srl_baudrate (s,9600); srl_write(s,"hello") ans = 5 char(srl_read (s,5)) ans = hello char(srl_read (s,5)) ans = hello char(srl_read (s,15)) ans = hellohellohello char(srl_read (s,4)) ans = hell char(srl_read (s,6)) ans = ohello It looks like as if the buffer is a ring buffer or is really big and filled with "hello". Maybe flushing the input after reading will solve the problem? Continued from the example before I got this Problem 2 [Hang after flush]: srl_flush (s, 1) char(srl_read (s,5)) # This blocks as expected but ... srl_read: Interrupting... ans = srl_write(s,"hello") ans = 5 char(srl_read (s,5)) # This also blocks!!!! srl_read: Interrupting... ans = The only way of getting things to work from this point on is to close the port and open it again. Can anybody reproduce this? any suggestions of tests to run to see whether the problem is at hardware level? I also tested with a virtual loopback (command "socat -d -d PTY: PTY:", this is simpler than the suggestion in the wiki. I can update that), I do not observe Problem 1, but I can't interrupt the second call to srl_read s = serial("/dev/ptmx", 9600); srl_write(s,"hello") ans = 5 char(srl_read (s,5)) ans = hello octave:5> char(srl_read (s,5)) srl_read: Interrupting... srl_read: Interrupting... srl_read: Interrupting... srl_read: Interrupting... Thanks ------------------------------------------------------------------------------ Everyone hates slow websites. So do we. Make your web apps faster with AppDynamics Download AppDynamics Lite for free today: http://p.sf.net/sfu/appdyn_sfd2d_oct _______________________________________________ Octave-dev mailing list Octave-dev@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/octave-dev
