初始化 LCD 液晶屏；功能描述；将 RGB 颜色转换为 8/16 位颜色;在指定坐标画点; 清屏(ILI9320 is a 262,144-color one-chip SoC driver for a-TFT liquid crystal display with resolution of 240RGBx320 dots, comprising a 720-channel source driver, a 320-channel gate driver, 172,800 bytes RA