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tcflush hang problem
- From: Martin Farnik <martin dot farnik at email dot cz>
- To: cygwin at cygwin dot com
- Date: Mon, 13 Oct 2003 08:27:14 +0200
- Subject: tcflush hang problem
I use CYGWIN_98-4.10 mine 1.5.5(0.94/3/2) 2003-09-20 16:31 i686 uknown unknown Cygwin
First i try to describe a situation:
I have a device which is connected with computer thru serial line.
Device is still sending data.These data isn't for my program.I have open com port and let them go into buffer . When a want to talk with device i flush input buffer,
send it a command paket and device stop sending data and wait for my next command.
Problem is when I want to flush INPUTbuffer before I send a command. In this point it hangs, maybe for buffer full.
Here is piece of code:
-----I open port when i start program -----
fd = open(PORT0, O_RDWR | O_NOCTTY );
tcgetattr(fd,&oldtio); /* save current port settings */
newtio.c_cflag = CS8 | CLOCAL | CREAD | CSTOPB;
newtio.c_iflag = 0;
newtio.c_oflag &= ~OPOST;
newtio.c_lflag = 0;
newtio.c_cc[VTIME] = 1;
newtio.c_cc[VMIN] = 0;
--this code is execute when a want to talk with device----
tcflush(fd, TCIFLUSH); <--------- in this point where it hangs
err = write (fd,iobuffer,10);
thank for help
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