Function ws2812_timing

tests/fl/channels/rx_sct_capture.cpp:40–49

WS2812B 4-phase decoder timings. Same nominal values as `WS2812Chipset`: T0H = 400 ns, T0L = 850 ns, T1H = 800 ns, T1L = 450 ns. We use ±150 ns tolerance so an idealised generator (no jitter) is comfortably inside the window without making bit-1 / bit-0 ambiguous.

// We use ±150 ns tolerance so an idealised generator (no jitter) is
// comfortably inside the window without making bit-1 / bit-0 ambiguous.
ChipsetTiming4Phase ws2812_timing() {
    ChipsetTiming4Phase t{};
    t.t0h_min_ns = 250;   t.t0h_max_ns = 550;
    t.t0l_min_ns = 700;   t.t0l_max_ns = 1000;
    t.t1h_min_ns = 650;   t.t1h_max_ns = 950;
    t.t1l_min_ns = 300;   t.t1l_max_ns = 600;
    t.reset_min_us = 50;
    t.gap_tolerance_ns = 0;
    return t;
}

// Emit one byte's worth of edge pairs (MSB first) into the buffer.
template <fl::size N>