lpd8806.h

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#pragma once

 
#include "fl/stl/stdint.h"
#include "fl/stl/array.h"
#include "fl/chipsets/encoders/encoder_utils.h"
#include "fl/chipsets/encoders/encoder_constants.h"
#include "fl/stl/noexcept.h"
 
namespace fl {

template <typename InputIterator, typename OutputIterator>
void encodeLPD8806(InputIterator first, InputIterator last, OutputIterator out) FL_NOEXCEPT {
    // LED data: GRB with MSB set (count as we go)
    size_t num_leds = 0;
    while (first != last) {
        const fl::array<u8, BYTES_PER_PIXEL_RGB>& pixel = *first;
 
        // LPD8806 requires MSB set on each byte, and uses 7-bit color depth
        // GRB order: 0=G, 1=R, 2=B
        *out++ = lpd8806Encode(pixel[0]);  // Index 0 (GRB order: Green)
        *out++ = lpd8806Encode(pixel[1]);  // Index 1 (GRB order: Red)
        *out++ = lpd8806Encode(pixel[2]);  // Index 2 (GRB order: Blue)
 
        ++first;
        ++num_leds;
    }
 
    // Latch: ((num_leds * 3 + 63) / 64) bytes of 0x00
    size_t latch_bytes = (num_leds * 3 + 63) / 64;
    for (size_t i = 0; i < latch_bytes; i++) {
        *out++ = 0x00;
    }
}
 
} // namespace fl