Module stm32f1xx_hal::pwm

Pulse width modulation

The general purpose timers (TIM2, TIM3, and TIM4) can be used to output pulse width modulated signals on some pins. The timers support up to 4 simultaneous pwm outputs in separate Channels

Usage

Start by setting all the pins for the timer you want to use to alternate push pull pins. The Pins trait shows the mapping between timers, output pins and channels.

let gpioa = ..; // Set up and split GPIOA
let pins = (
    gpioa.pa0.into_alternate_push_pull(),
    gpioa.pa1.into_alternate_push_pull(),
    gpioa.pa2.into_alternate_push_pull(),
    gpioa.pa3.into_alternate_push_pull(),
);

Then call the pwm function on the corresponding timer

  let device: pac::Peripherals = ..;

  // Put the timer in PWM mode using the specified pins
  // with a frequency of 100 hz.
  let (c0, c1, c2, c3) = device.TIM2.pwm(
      pins,
      &mut afio.mapr,
      100.hz()
      clocks,
      &mut rcc.apb
  );

  // Set the duty cycle of channel 0 to 50%
  c0.set_duty(c0.get_max_duty() / 2);
  // PWM outputs are disabled by default
  c0.enable()

Structs

C1
C2
C3
C4
Pwm

Traits

Pins
PwmExt