sm16716.h

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#pragma once
 
#include "pixeltypes.h"
#include "pixel_iterator.h"
#include "crgb.h"
#include "eorder.h"
// IWYU pragma: begin_keep
#include "platforms/shared/spi_pixel_writer.h"  // ok platform headers
// IWYU pragma: end_keep
#include "platforms/spi_output_template.h"
#include "fl/stl/noexcept.h"

//
// SM16716 definition - takes data/clock/select pin values (N.B. should take an SPI definition?)
//

template <int DATA_PIN, fl::u8 CLOCK_PIN, EOrder RGB_ORDER = RGB, fl::u32 SPI_SPEED = DATA_RATE_MHZ(16)>
class SM16716Controller : public CPixelLEDController<RGB_ORDER> {
    typedef fl::SPIOutput<DATA_PIN, CLOCK_PIN, SPI_SPEED> SPI;
    SPI mSPI;
 
    void writeHeader() FL_NO_EXCEPT {
        // Write out 50 zeros to the spi line (6 blocks of 8 followed by two single bit writes)
        mSPI.select();
        mSPI.template writeBit<0>(0);
        mSPI.writeByte(0);
        mSPI.writeByte(0);
        mSPI.writeByte(0);
        mSPI.template writeBit<0>(0);
        mSPI.writeByte(0);
        mSPI.writeByte(0);
        mSPI.writeByte(0);
        // Note: endTransaction() may not be strictly necessary for SM16716
        // since we're just streaming bytes. However, it's kept here for consistency
        // with other SPI-based controllers and as defensive programming.
        mSPI.endTransaction();
    }
 
public:
    SM16716Controller() FL_NO_EXCEPT {}
    #if defined(FL_IS_ESP32)
    CLEDController &setSpiBus(fl::Esp32SpiBus bus) FL_NO_EXCEPT override {
        mSPI.setBus(bus);
        return *this;
    }
    #endif
 
    virtual void init() FL_NO_EXCEPT {
        mSPI.init();
    }
 
protected:
    virtual void showPixels(PixelController<RGB_ORDER> & pixels) FL_NO_EXCEPT {
        // Make sure the FLAG_START_BIT flag is set to ensure that an extra 1 bit is sent at the start
        // of each triplet of bytes for rgb data
        // writeHeader();
        fl::writePixelsToSPI<FLAG_START_BIT, DATA_NOP, RGB_ORDER>(pixels, mSPI, nullptr);
        writeHeader();
    }
 
};