Grove RGB Matrix Led Rust Driver

Rust driver for Grove RGB Matrix Led with my-9221 Driver

Example

You can use the example provided for the stm32f3-discovery board

```sh

Install Cargo embed

cargo install cargo-embed

Flash the board

cargo embed --chip STM32F303VCTx --release --example stm32f3-discovery-example --target thumbv7em-none-eabihf

``` This is an early stage project