embassy-drv2605l

Driver for the DRV2605L haptic motor controller with both blocking and async I2C support.

Features

Dual mode: Both blocking and async I2C implementations
Motor support: ERM and LRA haptic motors
123 built-in effects: From clicks to buzzes to complex transitions
Custom patterns: Real-time playback mode for precise control
Waveform sequencing: Chain up to 8 effects
no_std compatible: For embedded systems
Optional defmt: Debug support when needed

Installation

[dependencies]
# For async (default)
embassy-drv2605l = "0.1.0"

# For blocking only
embassy-drv2605l = { version = "0.1.0", default-features = false, features = ["blocking"] }

# For both blocking and async
embassy-drv2605l = { version = "0.1.0", features = ["blocking", "async"] }

Quick Start

Async Mode

use embassy_drv2605l::{Drv2605l, Effect};

let mut haptic = Drv2605l::new(i2c);
haptic.init().await?;

// Play a click
haptic.play_waveform(Effect::StrongClick100.as_u8()).await?;

Blocking Mode

use embassy_drv2605l::{Drv2605l, Effect};

let mut haptic = Drv2605l::new(i2c);
haptic.init()?;

// Play a click  
haptic.play_waveform(Effect::StrongClick100.as_u8())?;

Common Usage Patterns

Motor Configuration

use embassy_drv2605l::{Drv2605l, MotorType};

let mut haptic = Drv2605l::new(i2c);
haptic.set_motor_type(MotorType::ERM).await?; // Default is LRA
haptic.init().await?;

Waveform Sequences

// Chain multiple effects
haptic.clear_waveform_sequence().await?;
haptic.set_waveform(0, Effect::StrongClick100.as_u8()).await?;
haptic.set_waveform(1, 0x81).await?;  // 10ms pause  
haptic.set_waveform(2, Effect::DoubleClick60.as_u8()).await?;
haptic.set_waveform(3, 0).await?;  // End marker
haptic.go().await?;

Real-Time Playback

// Custom intensity control
haptic.set_mode(Mode::RealTimePlayback).await?;
haptic.set_rtp_input(0x7F).await?;  // 50% intensity
haptic.set_rtp_input(0xFF).await?;  // Full intensity
haptic.set_rtp_input(0x00).await?;  // Stop

Popular Effects

Clicks: StrongClick100, SharpClick60, SoftBump100
Alerts: DoubleClick100, TripleClick100, Alert750ms
Transitions: TransitionRampUpShortSmooth1_100
Buzzes: StrongBuzz100, SmoothHum1_50

123 effects total - see Effect enum for complete list.

Timing in Sequences

Insert delays between effects: 0x80 | (delay_ms / 10)

haptic.set_waveform(1, 0x81).await?;  // 10ms
haptic.set_waveform(2, 0x8A).await?;  // 100ms  
haptic.set_waveform(3, 0xFF).await?;  // 1270ms (max)

Hardware

I2C Connection (Address: 0x5A)

VIN → 3.3V
GND → Ground
SDA → I2C Data
SCL → I2C Clock
EN → High (or leave - has pullup)

Motor Types

LRA: Precise feedback, low power, best for subtle patterns
ERM: Strong vibration, simple on/off control

License

MIT OR Apache-2.0

embassy-drv2605l 0.1.0