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Date: Tue, 29 Jan 2002 14:35:45 +0100
From: "Martin, Andreas {GW~Mannheim}" <ANDREAS DOT MARTIN AT Roche DOT COM>
Subject: AW: read() on serial port
To: ROLAND <roland_asmann AT yahoo DOT com>
Cc: cygwin AT cygwin DOT com
Message-id: <851F2BFC7E78D211A69800A0C9DB012802D80A17@rm2msem1.mah.roche.com>
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Hi,

simply try to remove the backslash from your remark. 

   charsin=read(f3,anmes,256); /* read message + cr */



-----Ursprüngliche Nachricht-----
Von: ROLAND [mailto:roland_asmann AT yahoo DOT com]
Gesendet am: Dienstag, 29. Januar 2002 14:12
An: cygwin AT cygwin DOT com
Betreff: read() on serial port

I just can't figure it out...
Here is the code of the part that does not work.

signal(SIGALRM,alarm_handler); /* set signal handler
*/
alarm(TIMOUT);		       /* set alarm */
while(mesan!=SET){
    if(progopt==SET)	printf("<");
    charsin=read(f3,anmes,256); /* read message + \n
*/
	if(anmes[2]=='0'&&anmes[3]=='1')
	mesan=SET; /* message is ack/nak message */
}
alarm(0);		/* reset alarm */
signal(SIGALRM,SIG_DFL); /* reset signal handler */

For some strange reason my program just locks on the
read(), and then nothing works anymore (not even the
signal and alarm).
Does anybody have a clue???
The program should try to read an ACK/NACK from the
serial port and if it did not read anything within 10
secs, it should trigger the alarm.
Please help me with this, I don't know what to do
anymore.

Roland


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