Instant Interrupts Questions

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  1. - 24th February 2006, 06:37 #1
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    Even though the interrupts for 18F's are more complicated, do you plan on making the code work for them sometime in the future. I wish I was fortunate enough to know assembly as well as you do. I have been reading in the 18F datasheets and they say you can enable and disable the interrupt priority feature. Would disabling the priority make it more doable. Or if not, maybe something like setting all the interrupts to either high priority or to all low priority. Anything I can do to convince you to do take on the task for us
    Last edited by jheissjr; - 24th February 2006 at 07:34.
  2. - 24th February 2006, 07:37 #2
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    An exert from an 18F datasheet:

    When the IPEN bit is cleared (default state), the interrupt priority feature is disabled and interrupts are compatible with PICmicro mid-range devices. In
    Compatibility mode, the interrupt priority bits for each source have no effect. INTCON<6> is the PEIE bit, which enables/disables all peripheral interrupt sources. INTCON<7> is the GIE bit, which enables/disables all interrupt sources. All interrupts branch to address 000008h in Compatibility mode.
    Last edited by jheissjr; - 24th February 2006 at 07:49.
  3. - 1st March 2006, 22:22 #3
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    Yes, you can make an 18F work like a 16F.

    But why buy a Ferrari, if it comes with a 60mph governor?

    Actually, I already have it working like that. But, I don't want to release a crippled version.

    Patience.
    <br>
    DT
  4. - 1st March 2006, 22:34 #4
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    Cool You can buy a ferrari also for the looks :D !!

    Hi Darrel, i certainly agree with your idea of using interrupts priority, but for the moment i would really find useful this system in 18F devices as i need for example more code (32K) or even the USB port.

    My 16f877 is full even with the method of storing strings in the code space.

    By the way, i am also looking to make my project to PRINT in a standard ASCII characters printer, can you give me any advice?, an easy link?. Thanks!!.
  5. - 1st March 2006, 23:05 #5
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    This might help with the printer part...
    http://www.picbasic.co.uk/forum/showthread.php?t=218
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    DT
  6. - 2nd March 2006, 02:05 #6
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    I would like to use the 18F because it has a large amount of RAM and code space. Other wise I agree, I would be using a 16F. Would you mind releasing the 'governed' version of what you have so far.
  7. - 14th March 2006, 01:24 #7
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    Is the INT_INT interupt the pin B0 interrupt? If so, does the interupt trigger on the falling or rising edge?

    In the example I am working with I am using an 16F877a

    Thanks
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