Announcing the release of version 1.03 of the ooPinChangeInt library. From the release notes:
Added MEGA support, as per PinChangeInt. This support has not been tested in this library; if you do use it with the MEGA please let me know. See the Google Code site for more information. Thanks.
Modified to not delete() pins that get detachInterrupt()'ed. Now when you detachInterrupt(), the PORT just disables interrupts for that pin; the PCintPin object remains in memory and in the linked list of pins (possibly slowing down your interrupts a couple of micros). You can reenable a detached interrupt- but you must do it within the PinChangeInt library (would anyone ever enable an interrupt on a pin, then disable it, then have need to reenable it but not using the library?).
Optimized the interrupt handler with code from robtillaart to take out the checks for changed pins from the while() loop that steps through the pins.
Other bugfixes that follow the PinChangeInt-2.17beta release:
- PCintPort::curr bug. In the interrupt handler PCint(), we loop as long as PCIFR indicates a new interrupt wants to be triggered, provided DISABLE_PCINT_MULTI_SERVICE is not defined (it is not by default). Fixed so that if a pin causes the PCIFR to change, we reread the port and look at how it is now.
- attachInterrupt() now returns an int8_t value: 1 on successful attach, 0 on successful attach but using an already-enabled pin, and -1 if the new() operator failed to create a PCintPin object.
- Created the enable() method.