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RE: PC nonblocking console I/O
- From: Gary Thomas <gary at mlbassoc dot com>
- To: "Richardson, Anthony" <ar63 at evansville dot edu>
- Cc: ecos-discuss at sources dot redhat dot com
- Date: Thu, 29 Jan 2004 15:20:32 -0700
- Subject: RE: [ECOS] PC nonblocking console I/O
- Organization: MLB Associates
- References: <FBAA835302BB614E9D5B54EBEA335DCB399C04@uemail02.evansville.edu>
On Thu, 2004-01-29 at 15:17, Richardson, Anthony wrote:
> On Thu, 2004-01-29 at 15:49, Thomas, Gary wrote:
> > On Thu, 2004-01-29 at 14:38, Richardson, Anthony wrote:
> > > 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'm using the 2.0 release.
> > You can't use ttydiag for this - it has to be a regular serial device.
> > 'ttydiag' maps onto the diagnostic I/O channel which is polled only.
> Is there another way to get nonblocked keyboard input then?
Use a different serial device other than ttydiag. Configure to include
the interrupt driven driver for /dev/ser0 and use that. That driver
does handle non-blocking I/O
Gary Thomas <email@example.com>
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