Device migrations, driver migrations and more (#575)

2026-07-20 23:43:17 +02:00
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+# CST816T touch controller
+
+A driver for the `CST816T` I2C capacitive touch controller by Hynitron.
+
+Implemented directly against the register. (no `esp_lcd_touch` dependency)
+
+- Manufacturer datasheet: https://github.com/koendv/cst816t/blob/master/extras/DS-CST816T%E6%95%B0%E6%8D%AE%E6%89%8B%E5%86%8CV2.2.pdf
+- Original/reference code: https://github.com/koendv/cst816t (Arduino driver, `src/cst816t.cpp`/`src/cst816t.h`), licensed under [The Unlicense](https://github.com/koendv/cst816t/blob/master/LICENSE)
+
+Single-touch only: the datasheet advertises "genuine two-point" support, but neither of the sources above documents a second touch-point register set, so only one point is read.
+
+`enter_sleep`/`exit_sleep` are unimplemented (`nullptr` in the `PointerApi`, per its "null if not supported" contract).
+The reference driver defines `REG_SLEEP_MODE` (0xE5) but never writes it, and the datasheet says waking from sleep needs
+a hardware reset pulse anyway, not a register write.
+
+License: [Apache v2.0](LICENSE-Apache-2.0.md)