Adding support for Si4463

[Liponchik]

This is a good module with si4463 chip and support for 4GFSK modulation, 1w big power. Might be a cool addition to Radiolib. in the repository https://github.com/Borchevkin/driver_si4463

[jgromes]

I'm aware of the Si4463, though don't have much experience with it, so if anyone would like to have a major contribution, that would be welcome.

[MesutErdemir]

Any updates about Si4463 module? Is anyone working on it?

[jgromes]

@MesutErdemir unfortunately I'm not working on this, I don't think anyone is.

[mpkendall]

This document shows migration from the Si443x to Si446x. This library already supports the 3x, so this may be a helpful resource. https://www.silabs.com/documents/public/application-notes/AN799.pdf. This would also support both this issue and issue 920.

[mpkendall]

I'll create a fork of this and fiddle around with the transition. If I get the module experimentally working, I'll create a PR and explain the changes. using AN799 above, I should be able to port the Si443x to Si4x6x. If I get stuck, I'll update here.

-Max

[jgromes]

@maxsrobotics that's amazing, looking forward to the PR :)

[mpkendall]

I've started changing command addresses, and I'll start with a PR for the basic commands (START_TX, GET_CHIP_STATUS etc.). Then, someone else can pick up for the more advanced commands, or I could do it if I have time.

[mpkendall]

Expect a PR in ~1-2 weeks

[MesutErdemir]

Expect a PR in ~1-2 weeks

I am looking forward your PR.
Thanks.