Copy-ready C Code

#include <Arduino.h>
#define TFT_LED_PIN 9

// Packed RGB565
const uint16_t COLOR = 0x4A3C;

// Split bytes for SPI transfers
const uint8_t COLOR_HI = 0x4A;
const uint8_t COLOR_LO = 0x3C;

void setup() {
  pinMode(TFT_LED_PIN, OUTPUT);
}

void loop() {
  // send COLOR_HI then COLOR_LO when driving TFT buffers
}