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Add RFC for an UART peripheral. #60

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Add RFC for an UART peripheral. #60

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Commits on Mar 20, 2024

  1. Add RFC for an UART peripheral.

    @jfng
    jfng committed Mar 20, 2024
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  2. RFC amaranth-lang#60: fix data stream signature and clock divisor.

    @jfng
    jfng committed Mar 20, 2024
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  3. RFC amaranth-lang#60: remove white background of SVG diagrams.

    @jfng
    jfng committed Mar 20, 2024
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  4. RFC amaranth-lang#60: fix SVG backgrounds.

    @jfng
    jfng committed Mar 20, 2024
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Commits on Mar 22, 2024

  1. RFC amaranth-lang#60: address some feedback. 

    - do not enforce a divisor encoding (besides being 16 bits).
- fix signature direction (the peripheral drives the interface).
- do not use abbreviated names (`rdy` is renamed to `ready`, etc).
- rename `Enable` to `Control` and add ResR0W0 padding bits.
- clarify the behavior of `Control.enable` values (0 and 1).
- reorder registers (`Status` now follows `Control`).
- rename `data_bits` to `symbol_width` and `data` to `symbol`.
- `symbol_width` must be a positive integer.
    @jfng
    jfng committed Mar 22, 2024
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  2. RFC amaranth-lang#60: fix formatting.

    @jfng
    jfng committed Mar 22, 2024
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  3. RFC amaranth-lang#60: add a rst member to the peripheral signature.

    @jfng
    jfng committed Mar 22, 2024
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  4. RFC amaranth-lang#60: rename symbol to symbols and bus to `csr_… 

    …bus`.
    @jfng
    jfng committed Mar 22, 2024
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Commits on Apr 2, 2024

  1. RFC amaranth-lang#60: replace Control/Divisor with Config/PhyCo… 

    …nfig`.

Also:
- Shorten API names (`ReceiverPHYSignature` -> `RxPhySignature`, etc).
- Replace `symbol_width` with `symbol_shape`.
- Use streams in `RxPhySignature` and `TxPhySignature`.
    @jfng
    jfng committed Apr 2, 2024
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