GPIO Quirk

[James Lynes]

Noticed today while running a series of test scripts that if I CTRL-C out of a script, the GPIO pins hold their last state. I ended up with LEDs on that shouldn't be. I guess this could be an issue if the pin is driving some actuator.

I don't see this as an error, but I guess I get to learn how to trap this interrupt and set all the outputs off before exiting.

James

[James Lynes]

SOLUTION

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$SIG{INT} = \&trapcc                                 # Trap CTRL-C Signal

sub trapcc {

    $led1->value(RPI_LOW);                       # Force the LEDs off

    $led2->value(RPI_LOW);

    $led3->value(RPI_LOW);

    die "Terminated by CTRL-C Signal\n\n"  # Kill the script

}

James