Add support SPI-UART adapters

[Seeung]

Description

I propose to add support for communication using SPI via UART.

How to solve the problem

To do this, you need to implement SpiDevice over Serial.

Describe alternatives you've considered

No response

Aditional context

An example of such a scenario is using stc12f204 and nrf24l01.

[josesimoes]

This is not a bug. At most a feature request. Moving to discussions.

[Seeung]

I used Feature request template

[josesimoes]

@Seeung can you elaborate a bit more on the intended usage scenario?
You're mixing an 8 bit MCU with an RF module... that sounds a bit confusing and requires context.

[Ellerbach]

So then what is your question? I still should be missing something, really sorry about that.

[Seeung]

The NRF24L01 library uses the SpiDevice class to work, which only works with the SPI bus. In my scenario I am using NRF24L01 communication via STC12F204 adapter with which I can communicate with NRF24L01 via UART. I would like to be able to use a ready-made solution or redefine SpiDevice without rebuilding libraries, for example, make the SpiDevice interface or an abstract class.

[alberk8]

So that means that on the nF side you should be using the UART library to talk to STC12F204.

[Seeung]

An example of using the adapter, I did not find it in English, only in Russian, there is an example of the implementation of the code for arduino.
https://kotvaska.medium.com/uart-%D0%B8-%D1%81%D0%B2%D1%8F%D0%B7%D1%8C-%D1%87%D0%B5%D1%80%D0%B5%D0%B7-%D0%BD%D0%B5%D0%B3%D0%BE-%D0%BF%D0%BE-nrf24l01-c5c68aafcc7b

[alberk8]

Like I say, you will be communicating with STC15FL204 via UART and that device will convert it to SPI for the NRF24L01.