eccpdemo.txt

来自「Hitech microchip PIC C18 Compiler」· 文本 代码 · 共 31 行

Title: eccpdemo

Target: PIC18F458

Description:
    A project that demonstrates the usage of the enhanced capture/
    compare/PWM module.

Controls:
    The DIP switch in the virtual I/O display is used to tell the
    module which mode it is operating in. The switches correspond
    to bits ECCP1M3:1 of the ECCP1CON register. The mode that is
    selected will be displayed in the serial I/O display.

    There are two potentiometers in the virtual I/O display. These
    are used to control the duty cycle/period if the module is in
    PWM mode. The PWM output will appear on the LED and also on
    the logic analyser if it is started.

    In capture mode, the pushbutton is used to attempt a capture.
    When the capture is made, the TMR3 value at the time of the
    capture will be printed to the serial IO window.

Connections to the PIC18F458:
    LED              -> PORTD4
    DIP switch [1:4] -> PORTC [0:3]
    Potentiometer 1  -> PORTA0 (period)
    Potentiometer 2  -> PORTA1 (duty cycle)
    Pushbutton       -> PORTB4 & PORTD4
    Analyser [0:3]   -> PORTD [4:7]