Date: Mon, 6 May 1996 20:49:33 +0000 From: "Franz Hollerer" <eeg@telecom.at> To: freebsd-questions@FreeBSD.org Subject: realtime processes Message-ID: <199605061850.UAA52374@pina1>
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Hi,
Please, can someone tell me if the following may work:
rtprio(.....); /* realtime scheduling priority */
set_rts(); /* set rs232c rts output */
usleep(10000); /* sleep between 10 and 20ms */
outp_rs232(....); /* output a string to rs232 and wait */
/* until the whole string is */
/* send */
usleep(10000); /* sleep between 10 and 20ms */
res_rts(); /* reset rs232c rts output */
rtprio(.....); /* normal scheduling priority */
I have same questions referring to the above code fragment and I
hobe that someone will answer this questions.
1) Can I trust the scheduler that my process will get the CPU
between 10 and 20ms?
2) Output to RS232:
I'm of the know of a system call which waits for output to drain.
But normally this system call waits 100ms or more after the
last character. I would need 10ms. Is this
possible?
Thanks,
Franz
EEG, Hard&Software Development
Austria
We have no kangaroos.
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