Here are three examples of custom I²C displays written in Rust for the STM32F103 Microcontroller. These are commonly found on "Blue-Pill" development boards.

There is an accompanying blog post walking through the details.

• Rust
• cargo embed and cargo flash
• Target support rustup target install thumbv7m-none-eabi

See the stm32f1xx Quickstart Guide for more details on the dev environment and flashing.

Testing the LEDs:

cargo build --release --bin led-test
cargo flash --release --bin led-test --chip STM32F103C8

I²C LED Bar:

cargo build --release --bin i2c-leds
cargo flash --release --bin i2c-leds --chip STM32F103C8
cargo embed --release --bin led-test --chip STM32F103C8

7-Segment 4-Digit I²C Display:

cargo build --release --bin i2c-7-segment
cargo flash --release --bin i2c-7-segment --chip STM32F103C8
cargo embed --release --bin i2c-7-segment --chip STM32F103C8

4 Digit Vacuum Fluorescent Display over I²C:

cargo build --release --bin i2c-vfd`
cargo flash --release --bin i2c-vfd --chip STM32F103C8
cargo embed --release --bin i2c-vfd --chip STM32F103C8

Licensed under either of

• Apache License, Version 2.0 (LICENSE-APACHE or http:https://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http:https://opensource.org/licenses/MIT)

at your option.

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.