st7789v2 240*320 怎么初始化为常黑 rgb565

以下是ST7789V2液晶显示屏初始化为常黑RGB565模式的代码示例，供您参考：

// 引脚定义
#define TFT_CS 10
#define TFT_DC 9
#define TFT_RST 8

// 初始化函数
void tft_init() {
  // 硬件初始化
  pinMode(TFT_CS, OUTPUT);
  pinMode(TFT_DC, OUTPUT);
  pinMode(TFT_RST, OUTPUT);

  digitalWrite(TFT_CS, HIGH);
  digitalWrite(TFT_DC, HIGH);
  digitalWrite(TFT_RST, HIGH);

  // 软件初始化
  tft_reset(); // 复位ST7789V2液晶显示屏

  // ST7789V2液晶显示屏初始化代码
  tft_write_command(0x36); // Memory data access control
  tft_write_data(0x40);    // Y-Mirror & X-Mirror, Reverse RGB
  tft_write_command(0x3A); // Interface pixel format
  tft_write_data(0x55);    // 16-bit / pixel RGB565
  tft_write_command(0xB2); // Porch control
  tft_write_data(0x0C);
  tft_write_data(0x0C);
  tft_write_data(0x00);
  tft_write_data(0x33);
  tft_write_data(0x33);
  tft_write_command(0xB7); // Gate control
  tft_write_data(0x35);
  tft_write_command(0xBB); // VCOMS setting
  tft_write_data(0x19);
  tft_write_command(0xC0); // LCMCTRL
  tft_write_data(0x2C);
  tft_write_command(0xC2); // VDV and VRH command enable
  tft_write_data(0x01);
  tft_write_command(0xC3); // VRH set
  tft_write_data(0x12);
  tft_write_command(0xC4); // VDV set
  tft_write_data(0x20);
  tft_write_command(0xC6); // Frame rate control
  tft_write_data(0x0F);
  tft_write_command(0xD0); // Power control 1
  tft_write_data(0xA4);
  tft_write_data(0xA1);
  tft_write_command(0xE0); // PVGAMCTRL
  tft_write_data(0xD0);
  tft_write_data(0x00);
  tft_write_data(0x05);
  tft_write_data(0x0E);
  tft_write_data(0x15);
  tft_write_data(0x0D);
  tft_write_data(0x37);
  tft_write_data(0x43);
  tft_write_data(0x47);
  tft_write_data(0x09);
  tft_write_data(0x15);
  tft_write_data(0x12);
  tft_write_data(0x16);
  tft_write_data(0x19);
  tft_write_command(0xE1); // NVGAMCTRL
  tft_write_data(0xD0);
  tft_write_data(0x00);
  tft_write_data(0x05);
  tft_write_data(0x0D);
  tft_write_data(0x0C);
  tft_write_data(0x06);
  tft_write_data(0x2D);
  tft_write_data(0x44);
  tft_write_data(0x40);
  tft_write_data(0x0E);
  tft_write_data(0x1C);
  tft_write_data(0x18);
  tft_write_data(0x16);
  tft_write_data(0x19);
  tft_write_command(0x2A); // Column address set
  tft_write_data(0x00);
  tft_write_data(0x00);
  tft_write_data(0x01);
  tft_write_data(0x3F);
  tft_write_command(0x2B); // Row address set
  tft_write_data(0x00);
  tft_write_data(0x00);
  tft_write_data(0x01);
  tft_write_data(0xE0);
  tft_write_command(0x29); // Display on
}

// 发送命令
void tft_write_command(uint8_t cmd) {
  digitalWrite(TFT_DC, LOW);
  digitalWrite(TFT_CS, LOW);
  SPI.transfer(cmd);
  digitalWrite(TFT_CS, HIGH);
}

// 发送数据
void tft_write_data(uint8_t data) {
  digitalWrite(TFT_DC, HIGH);
  digitalWrite(TFT_CS, LOW);
  SPI.transfer(data);
  digitalWrite(TFT_CS, HIGH);
}

// 复位
void tft_reset() {
  digitalWrite(TFT_RST, LOW);
  delay(50);
  digitalWrite(TFT_RST, HIGH);
  delay(50);
}

需要注意的是，不同的液晶显示屏驱动程序的设置方法可能会有所不同，具体操作需要参考液晶显示屏驱动程序的说明文档。同时，如果您不熟悉相关的硬件和软件知识，建议寻求专业人士的帮助。