Wrong timing in `smart-led-adapter`

[bjoernQ]

At least on ESP32 and ESP32-S2 the timing of the signals seems wrong:

• esp-hal/esp32-hal/examples/hello_rgb.rs

  Line 35 in 0c8dd59

  let rmt = Rmt::new(peripherals.RMT, 80u32.MHz(), &clocks).unwrap();

• esp-hal/esp-hal-smartled/src/lib.rs

  Line 39 in 0c8dd59

  const SOURCE_CLK_FREQ: u32 = 40_000_000;

Apparently, some LEDs are much, much more tolerant to incorrect timing - so it's often working this way. But e.g. on esp-buddy board the LED is very strict about timings

We should definitely validate timings with a logic analyzer when fixing it, this time.

[jessebraham]

Related to #74 I guess

[bjoernQ]

Related to #74 I guess

Oh, thanks for linking that issue! Yes, this is really a bad inconsistency - totally forgot about that issue

[bjoernQ]

I double checked and with all my WS2812 LEDs it works as it is - so there seem to be something interesting going on with ESP-BUDDY

[bjoernQ]

Closing (for now) since it seems to be something special about one special (now unavailable) dev-board