Adafruit NeoTrellis M4 Express Board Support Crate

This crate provides a type-safe Rust API for working with the [Adafruit NeoTrellis M4 board].

Board Features

• Microchip [ATSAMD51G] Cortex-M4 microcontroller @ 120 MHz (32-bit, 3.3V logic and power)
  • 512kB Flash
  • 192kB SRAM
• 8 MB SPI Flash chip
• USB device controller (for e.g. MIDI)
• 4-JST hacking port with 3.3V power, ground, and two GPIO (can be I2C/ADC/UART)
• Analog Devices [ADXL343] triple-axis accelerometer

Prerequisites

• Install the cross compile toolchain rustup target add thumbv7em-none-eabihf
• Install cargo-hf2 the hf2 bootloader flasher tool however your platform requires

Uploading an example

Check out the repository for examples:

https://github.com/atsamd-rs/atsamd/tree/master/boards/trellis_m4/examples

• Be in this directory cd boards/trellis_m4
• Put your device in bootloader mode usually by hitting the reset button twice.
• Build and upload in one step $ cargo hf2 --release --example neopixel_rainbow Finished release [optimized + debuginfo] target(s) in 0.19s Searching for a connected device with known vid/pid pair. Trying Ok(Some("Adafruit Industries")) Ok(Some("PyBadge")) Flashing "/Users/User/atsamd/boards/trellis_m4/target/thumbv7em-none-eabihf/release/examples/neopixel_rainbow" Finished in 0.079s $

Optional trellis_m4 Cargo Features

The following optional hardware drivers can be enabled as cargo features:

• adxl343: [ADXL343] accelerometer support
• keypad-unproven: (alpha) support for button input via the [keypad] crate

To enable them, use the features option when adding a crate dependency to your Cargo.toml:

toml [dependencies] trellis_m4 = { version = "~0.1", features = ["adxl343", "keypad-unproven"] }

Or when running an example: $ cargo hf2 --release --example neopixel_keypad error: target `neopixel_keypad` in package `trellis_m4` requires the features: `keypad-unproven` Consider enabling them by passing, e.g., `--features="keypad-unproven"` Just follow the instructions to add --features like cargo hf2 --release --example neopixel_keypad --features="keypad-unproven" Finished release [optimized + debuginfo] target(s) in 0.09s Searching for a connected device with known vid/pid pair. Trying Ok(Some("Adafruit Industries")) Ok(Some("PyGamer")) Flashing "/Users/User/atsamd/boards/trellis_m4/target/thumbv7em-none-eabihf/release/examples/neopixel_keypad" Finished in 0.167s $

More Examples