blinky-esp/main/spi_leds.hpp

#pragma once

#include <driver/spi_master.h>

#include "leds.hpp"


class SPI_LEDs : public LEDStrip {
public:
    SPI_LEDs(int gpio, int length = 0);
    void show();
    void length_changing(int len) { configure(len); }

private:
    spi_host_device_t host;
    int gpio;
    spi_device_handle_t device;
    uint8_t *out_buf;
    spi_transaction_t transaction;

    static constexpr int reset_bytes = 30;
    static size_t tx_len(int len) { return (len * 3) * 4 + reset_bytes; }

    void configure(int length);
};