spressense HAL [CXD5602]

[nakajimayoshi]

Hi all, thanks for making this crate.

Sony released the spressense board based in December last year and it looks to be a strong competitor to current offerings from espressif and raspberry pi.

Thanks to Sony being a rather large player, there's a ton of documentation as well on the chip.

https://developer.sony.com/spresense/development-guides/home_en.html

It currently supports development via:

• Arduino
• Sony's proprietary SDK
• Circuit python

I think it would be a cool project to add embassy to this list :)

I might look into implementing the HAL myself, but my experience programming microcontrollers is very slim so I wanted to at least start a discussion on it. There's an existing SDK in C, so it probably just involves writing rust bindings to the C api.

The board uses a CXD5602 chip. I'm not sure if a current HAL in the repo supports this.