ESP32-C3 interfacing to a PS/2 Keyboard (bare-metal Rust)

Very simplified example of connecting a PS/2 keyboard to ESP32-C3

You need to build it with the release profile (i.e. cargo run --release) since otherwise the interrupt latency is too slow.

Circuit

2 x 2.2kΩ resitors
2 x 120Ω resitors


    Keyboard                                    ESP32-C3

    5V      ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━  5V

    GND     ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━  GND

                                        ┏━━━━━┓
    DATA    ━━━━━━━━━━━━━━━━━━━━━┳━━━━━━┫ 120 ┣━┳━  IO1
                                 ┃      ┗━━━━━┛ ┃
                                ┏┻┓             ┃
                                ┃2┃             ┗━  IO8
                                ┃.┃
                                ┃2┃
                                ┃k┃
                                ┗┳┛
                                 ┃
                                 ┣━━━━━━━━━━━━━━━━  3V3
                                 ┃
                                ┏┻┓
                                ┃2┃
                                ┃.┃
                                ┃2┃
                                ┃k┃
                                ┗┳┛
                                 ┃      ┏━━━━━┓
    CLK     ━━━━━━━━━━━━━━━━━━━━━┻━━━━━━┫ 120 ┣━┳━  IO2
                                        ┗━━━━━┛ ┃
                                                ┃
                                                ┗━  IO7

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