epwmdemo.txt

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

Title: epwmdemo

Target: PIC18F458

Description:
    A project to demonstrate the extended PWM ability of the
    PIC18F4x8 devices.

Controls:
    Two DIP switches are used in this project. The first selects
    which PWM mode the device will operate in. For example, single
    output, half-bridge, full-bridge.

    The second DIP switch determines that the active output level
    for the PWM output pairs.

    PWM period and duty are modified using the potentiometers.

    The output of the PWM pairs is displayed on the logic analyser
    and on the LED display.

    The current mode of operation is readable in the serial IO window.

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