Crate dshot_frame

Support for the DShot ESC protocol

DShot has two-byte frames, where the first 11 bits are the throttle speed, bit 12 is a telemetry request flag, and the last four bits are a checksum.

Throttle values below 48 are reserved for special commands.

It is transmitted over the wire at a fixed speed, with ones and zeroes both being pulses, but ones being twice as long as zeroes.

Usage

This example is adapted from an embassy-stm32 codebase:

let mut pwm = SimplePwm::new(
    timer,
    Some(PwmPin::new_ch1(pin, OutputType::PushPull)),
    None,
    None,
    None,
    Hertz(150_000),
    CountingMode::EdgeAlignedUp,
);
let max_duty_cycle = pwm.get_max_duty() as u16;

let frame = Frame::new(1000, false).unwrap();
pwm.waveform_up(&mut dma, Ch1, &frame.duty_cycles()).await;
// Pull the line low after sending a frame.
pwm.set_duty(channel, 0);
pwm.enable(channel);

Structs

Frame

A frame of two bytes that get send over the wire.

Enums

Command

Fixed commands that occupy the lower 48 speed values.