#define ST7789_LCD_WIDTH     240
#define ST7789_LCD_HEIGHT    320

extern void     LCD_IO_Init(void);                                  // SPI bus init and LCD RESX pin toggle
extern void     LCD_IO_WriteCommand(uint8_t command);               // SPI write command
extern void     LCD_IO_WriteData(uint8_t *data, uint8_t length);    // SPI write data
extern uint16_t LCD_IO_ReadData(void);                              // SPI read data
extern void     LCD_IO_Delay(uint32_t delay);                       // Basic MCU delay

/**
 * @brief Initializes display SPI bus and toggles RESX for hardware reset.
 * 
 */
void LCD_IO_Init(void) {
  //* CSX pin  toggle
  CS_IDLE();         // Set CS pin HIGH
  LCD_IO_Delay(20);  // Reset pulse time
  CS_ACTIVE();       // Set CS pin LOW
  LCD_IO_Delay(20);  // Reset pulse time

  //* RESX pin routine
  RESX_IDLE();      // Set RESX pin HIGH
  LCD_IO_Delay(50); // Reset pulse time
  RESX_ACTIVE();    // Set RESX pin LOW
  LCD_IO_Delay(50); // Reset pulse time
  RESX_IDLE();      // Set RESX pin HIGH
  LCD_IO_Delay(50); // Reset pulse time
}

/**
  * @brief  Writes to the display using D/CX pin, selecting Command option.
  */
void LCD_IO_WriteCommand(uint8_t command) {
  DC_COMMAND();   // Set WRX pin LOW to indicate Command
  CS_ACTIVE();    // Set CS pin LOW
  
  // SPI 1-byte transmission example, change this to your SPI transmit function
  HAL_SPI_Transmit(&hspi4, &command, 1, 500);
  
  CS_IDLE();      // Set CS pin HIGH
}

/**
  * @brief  Writes to the display using D/CX pin, selecting Data option.
  * 
  */
void LCD_IO_WriteData(uint8_t *data, uint8_t length) {
  if (length > 0) {
    DC_DATA();      // Set WRX pin HIGH to indicate Data
    CS_ACTIVE();    // Set CS pin LOW
    
    // SPI 1-byte transmission example, change this to your SPI transmit function
    HAL_SPI_Transmit(&hspi4, data, length, 500);
  }

  CS_IDLE();        // Set CS pin HIGH
}

/**
  * @brief  Simple MCU delay in ms.
  * @param  Delay in ms.
  */
void LCD_IO_Delay(uint32_t Delay) {
  HAL_Delay(Delay);  // MCU Delay function
}