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PC nonblocking console I/O
- From: "Richardson, Anthony" <ar63 at evansville dot edu>
- To: <ecos-discuss at sources dot redhat dot com>
- Date: Thu, 29 Jan 2004 15:38:51 -0600
- Subject: [ECOS] PC nonblocking console I/O
I've been trying to get nonblocking read working on the PC console
using the following code:
cyg_uint32 blkinfo = 0;
length = sizeof(blkinfo);
stat = cyg_io_set_config(console,
CYG_IO_SET_CONFIG_SERIAL_READ_BLOCKING,
&blkinfo, &length);
where console is a handle corresponding to "/dev/ttydiag"
I keep getting error 22 "Invalid argument". I am able to to turn off
character echoing (I'm trying to get a raw console) so I'm pretty sure
that
the console handle is okay. Is this not working because the console
doesn't
correspond to a real serial device or am I doing something wrong?
I did set the CYGOPT_IO_SERIAL_SUPPORT_NONBLOCKING option in the
configuration. I've tried various options in the configuration tool
with
regard to enabling "TTY mode serial device drivers" and "TTY mode
channel #2"
but without success. If anyone could provide pointers they would be
much appreciated.
I'm using the 2.0 release.
Thanks,
Tony Richardson
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