autoshut.txt

Hitech microchip PIC C18 Compiler

Title: autoshut

Target: PIC18F458

Description:
    This demo project is to illustrate the autoshutdown feature of
    the PIC18F4x8 devices. This feature is used to shutdown the
    ECCP module, if a selected external event occurs. The external
    events that can cause an autoshutdown are
    1) external interrupt 0 on PORTB event
    2) analog comparator 1 event
    3) analog comparator 2 event

Controls:
    There are four pushbuttons used in this project. The solitary
    pushbutton is used to start or re-start the ECCP module after a
    shutdown event has occured. Each pushbutton in the group of three
    pushbuttons acts on one of the external events listed above.

    The LEDs demonstrate the status of the ECCP module. Red indicates
    the module has been shutdown. Green indicates the ECCP module is
    active. Yellow is the PWM output from the ECCP module, and thus
    should only give an output while the green LED is on.

Connections to the PIC18F458:
    Pushbutton 1 -> PORTB1
    LED green    -> PORTC2
    LED yellow   -> PORTD4
    LED red      -> PORTC0
    Pushbutton 2 -> PORTB0
    Pushbutton 3 -> PORTD1
    Pushbutton 4 -> PORTD3