Hello all,
we usually do
struct termios _options;
...
_fh = [NSFileHandle fileHandleForUpdatingAtPath:@"/dev/term/a"];
tcsetattr([_fh fileDescriptor], TCSADRAIN, &_options);
[_fh writeData:...;
to access a serial port. GSFileHandle does
- (id) initForUpdatingAtPath: (NSString*)path
{
int d = open([path fileSystemRepresentation], O_RDWR | O_BINARY);
...
}
This approach works with the built-in serial ports on our Debian and
Solaris boxes. Now we are using an EdgePort Device (USB-Serial-Adaptor)
to add four additional serial ports to a Solaris machine. This device
is natively supported by Solaris. A few seconds after plugging in the
device we see the following devices
/dev/term/0
/dev/term/1
/dev/term/2
/dev/term/3
Cool so far. However, openening these devices with NSFileHandle does
not work. The line [NSFileHandle
fileHandleForUpdatingAtPath:@"/dev/term/0"] blocks (never returns). We
have to do
int fdes = open([device cString], O_RDWR | O_NDELAY);
_fh = [[NSFileHandle alloc] initWithFileDescriptor:fdes
closeOnDealloc:YES];
instead. This works! Should this option be added to the GSFileHandle
code? I did not figure out what exactly this option does. Insights
would be greatly appreciated!
Thanks,
Andreas
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