Struct PWMLED 

pub struct PWMLED(/* private fields */);

Represents a light emitting diode (LED) with variable brightness. A typical configuration of such a device is to connect a GPIO pin to the anode (long leg) of the LED, and the cathode (short leg) to ground, with an optional resistor to prevent the LED from burning out.

Implementations

impl PWMLED

pub fn new(pin: u8) -> PWMLED

Returns a PMWLED with the pin number given

• pin - The GPIO pin which the device is attached to

Examples found in repository

examples/softpwm.rs (line 7)

fn main() {
    // Create a new LED attached to Pin 17
    let mut led = PWMLED::new(17);

    // blink the LED 5 times
    led.set_blink_count(5);
    led.blink(2.0, 2.0, 1.0, 1.0);

    // wait for key press to exit
    let _ = io::stdin().read(&mut [0u8]).unwrap();
}

pub fn blink( &mut self, on_time: f32, off_time: f32, fade_in_time: f32, fade_out_time: f32, )

Make the device turn on and off repeatedly

• on_time - Number of seconds on
• off_time - Number of seconds off
• fade_in_time - Number of seconds to spend fading in
• fade_out_time - Number of seconds to spend fading out

Examples found in repository

examples/softpwm.rs (line 11)

fn main() {
    // Create a new LED attached to Pin 17
    let mut led = PWMLED::new(17);

    // blink the LED 5 times
    led.set_blink_count(5);
    led.blink(2.0, 2.0, 1.0, 1.0);

    // wait for key press to exit
    let _ = io::stdin().read(&mut [0u8]).unwrap();
}

pub fn on(&mut self)

Turns the device on.

pub fn off(&mut self)

Turns the device off.

pub fn pulse(&mut self, fade_in_time: f32, fade_out_time: f32)

Make the device fade in and out repeatedly.

• fade_in_time - Number of seconds to spend fading in
• fade_out_time - Number of seconds to spend fading out

pub fn set_value(&mut self, value: f64)

Set the duty cycle of the PWM device. 0.0 is off, 1.0 is fully on. Values in between may be specified for varying levels of power in the device.

pub fn set_blink_count(&mut self, n: i32)

Set the number of times to blink the device

• n - Number of times to blink

Examples found in repository

examples/softpwm.rs (line 10)

fn main() {
    // Create a new LED attached to Pin 17
    let mut led = PWMLED::new(17);

    // blink the LED 5 times
    led.set_blink_count(5);
    led.blink(2.0, 2.0, 1.0, 1.0);

    // wait for key press to exit
    let _ = io::stdin().read(&mut [0u8]).unwrap();
}