Hello, I am experiencing spurious interrupts on the parallel port as described below (they seem to be very periodic). Surya (or anyone reading this), If you have resolved this please let me know. It sounds like the interrupt handler needs to check the source of the interrupt, but I'm not sure how to do this, or even if this makes sense. I'm using RedHat 6.1 and Rtlinux-2.0 on a Dell Inspiron Laptop. Thanks for any help, Bryan Althouse Thomas Wuensche wrote: >Hello Surya, > >the printer port interrupt also serves to catch spurious >interrupts, this means pulses on ANY interrupt line, >which are so short, that the channel they have actually >appeared on can not be detected by the interrupt controller. >You should place code to check whether there actually is >an interrupt from the printer port, and silently exit >the service routine otherwise. > >I have not studied your code, but hope this helps >anyway. > >Best regards, > >Thomas Wuensche > >Surya P Kommareddy wrote: >> >> Hi all, >> Merry Christmas and a happy new year. >> I have been trying to write an Interrupt handler, for the parallel >> port. Attached are the files for the module. Even though I don't give any >> interrupt signal(tenth pin of the port) on the parallel port, the >> interrupt handler gets activated. Am I doing something wrong?? I am using >> RTlinux2.0 on Redhat6.1 with 2.2.13 kernel. >> >> Thanks in anticipation, >> Surya. >> -- [rtl] --- To unsubscribe: echo "unsubscribe rtl" | mail [EMAIL PROTECTED] OR echo "unsubscribe rtl <Your_email>" | mail [EMAIL PROTECTED] --- For more information on Real-Time Linux see: http://www.rtlinux.org/rtlinux/
