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tiliqua/i2c: rewrite audio interface i2c state machine #72

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tiliqua/i2c: rewrite audio interface i2c state machine #72

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@vk2seb vk2seb commented Nov 24, 2024

  • Split up i2c.Peripheral and i2c.Streamer, so the transaction-based I2C core can be used more easily by RTL directly.
  • Rewrite the old eurorack-pmod state machine in Amaranth based on this new interface.
    • This is used for codec, touch init, jack reading, etc
  • Resource usage is almost the same as it used to be.
  • Crucially, this enables codec muting (pop-free bitstream switching), but is disabled for now.
  • Persistent PDN clocking is now enabled on mobo R3+ (required for muting)

TODO:

  • Verify touch sense IC CRC after boot to ensure it was correctly flashed?

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