Need interrupt driven serial driver (QNX 6)

QNX Newsgroups (Archives) qdn.public.qnxrtp.os
1

Hi,
I would like to have an interrupt driven RS232 driver - does anyone have
code they would like to share? I have looked at the example in Rob
Krten’s book (Chapter 4), but am wondering if this hasn’t already been
done many times by better programmers than myself…

Thanks.

2

The devc-8250 is most likely interrupt driven.
Do you want to replace this?

Bruce Davis wrote:

Hi,
I would like to have an interrupt driven RS232 driver - does anyone have
code they would like to share? I have looked at the example in Rob
Krten’s book (Chapter 4), but am wondering if this hasn’t already been
done many times by better programmers than myself…

3

I need to get a pulse or message or something when a character (or terminator)
arrives so I don’t need to poll. I don’t see how to do this with read() or
readcond().

Alex wrote:

The devc-8250 is most likely interrupt driven.
Do you want to replace this?

Bruce Davis wrote:

Hi,
I would like to have an interrupt driven RS232 driver - does anyone have
code they would like to share? I have looked at the example in Rob
Krten’s book (Chapter 4), but am wondering if this hasn’t already been
done many times by better programmers than myself…

4

Previously, Bruce Davis wrote in qdn.public.qnxrtp.os:

I need to get a pulse or message or something when a character (or terminator)
arrives so I don’t need to poll. I don’t see how to do this with read() or
readcond().

Here are two approaches.

  1. Have a thread read the device, and when it receives a char, send the char
    in a pulse to the main process.

  2. use select_attach().


    Mitchell Schoenbrun --------- maschoen@pobox.com

5

“Mitchell Schoenbrun” <maschoen@pobox.com> wrote in message
news:Voyager.010313175625.261D@schoenbrun.com…

Previously, Bruce Davis wrote in qdn.public.qnxrtp.os:
I need to get a pulse or message or something when a character (or
terminator)
arrives so I don’t need to poll. I don’t see how to do this with read()
or
readcond().

Here are two approaches.

  1. Have a thread read the device, and when it receives a char, send the
    char
    in a pulse to the main process.

  2. use select_attach().

  1. ionotify()

Mitchell Schoenbrun --------- > maschoen@pobox.com