On Tuesday 10 Jun 2003 10:36 am, Toralf Lund wrote:
> I'm trying to transfer an ASCII file ("S-record" format) across a serial
> link from a Red Hat system to an IPC board. If I do
> cat <file> > /dev/ttyS0
> (with connection at first serial port) it seems like the transfer gets
> stuck after the 1st line. If I echo the file one line at a time with a
> small delay between the lines, however, the transfer is successful. E.g.
> cat <file> | while read line ; do echo $line > /dev/ttyS0; usleep
> 10000; done
> works just fine. Can anyone explain this? Is there any way I can set
> "stty" parameters or similar so that the direct cat would work? I've
> experimented a bit with the "newline" and "delay" settings, but it didn't
> help a lot...
Hi,
It sounds like a flow control problem to me.
Does the IPC board have any limitations that you're not taking into account?
How did you set up the serial line parameters (speed, bits etc)?
Did you turn on RTS/CTS or Xon/Xoff flow control?
Have you tried using a proper comms program to send the file, such as kermit
or minicom?
Gary
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Gary Stainburn
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