lcd_ili9341.c

#include "lcd_ili9341.h"

extern SPI_HandleTypeDef hspi5;

void LCD_WriteCommand(uint8_t command)
{
  uint8_t dummy;

  HAL_GPIO_WritePin(GPIOD, GPIO_PIN_13, GPIO_PIN_RESET);        //DCX LOW
  HAL_GPIO_WritePin(GPIOC, GPIO_PIN_2, GPIO_PIN_RESET);         //CSX LOW
  HAL_SPI_TransmitReceive(&hspi5, &command, &dummy, 1, 0xFFFF);
  HAL_GPIO_WritePin(GPIOC, GPIO_PIN_2, GPIO_PIN_SET);           //CSX HIGH
}

void LCD_WriteData(uint8_t data)
{
  uint8_t dummy;

  HAL_GPIO_WritePin(GPIOD, GPIO_PIN_13, GPIO_PIN_SET);          //DCX HIGH
  HAL_GPIO_WritePin(GPIOC, GPIO_PIN_2, GPIO_PIN_RESET);         //CSX LOW
  HAL_SPI_TransmitReceive(&hspi5, &data, &dummy, 1, 50);
  HAL_GPIO_WritePin(GPIOC, GPIO_PIN_2, GPIO_PIN_SET);           //CSX HIGH
}

void LCD_PowerOn(void)
{
  LCD_WriteCommand(0xCA);
  LCD_WriteData(0xC3);
  LCD_WriteData(0x08);
  LCD_WriteData(0x50);
  LCD_WriteCommand(LCD_POWERB);
  LCD_WriteData(0x00);
  LCD_WriteData(0xC1);
  LCD_WriteData(0x30);
  LCD_WriteCommand(LCD_POWER_SEQ);
  LCD_WriteData(0x64);
  LCD_WriteData(0x03);
  LCD_WriteData(0x12);
  LCD_WriteData(0x81);
  LCD_WriteCommand(LCD_DTCA);
  LCD_WriteData(0x85);
  LCD_WriteData(0x00);
  LCD_WriteData(0x78);
  LCD_WriteCommand(LCD_POWERA);
  LCD_WriteData(0x39);
  LCD_WriteData(0x2C);
  LCD_WriteData(0x00);
  LCD_WriteData(0x34);
  LCD_WriteData(0x02);
  LCD_WriteCommand(LCD_PRC);
  LCD_WriteData(0x20);
  LCD_WriteCommand(LCD_DTCB);
  LCD_WriteData(0x00);
  LCD_WriteData(0x00);
  LCD_WriteCommand(LCD_FRC);
  LCD_WriteData(0x00);
  LCD_WriteData(0x1B);
  LCD_WriteCommand(LCD_DFC);
  LCD_WriteData(0x0A);
  LCD_WriteData(0xA2);
  LCD_WriteCommand(LCD_POWER1);
  LCD_WriteData(0x10);
  LCD_WriteCommand(LCD_POWER2);
  LCD_WriteData(0x10);
  LCD_WriteCommand(LCD_VCOM1);
  LCD_WriteData(0x45);
  LCD_WriteData(0x15);
  LCD_WriteCommand(LCD_VCOM2);
  LCD_WriteData(0x90);
  LCD_WriteCommand(LCD_MAC);
  LCD_WriteData(0xC8);
  LCD_WriteCommand(LCD_3GAMMA_EN);
  LCD_WriteData(0x00);
  LCD_WriteCommand(LCD_RGB_INTERFACE);
  LCD_WriteData(0xC2);
  LCD_WriteCommand(LCD_DFC);
  LCD_WriteData(0x0A);
  LCD_WriteData(0xA7);
  LCD_WriteData(0x27);
  LCD_WriteData(0x04);

  /* colomn address set */
  LCD_WriteCommand(LCD_COLUMN_ADDR);
  LCD_WriteData(0x00);
  LCD_WriteData(0x00);
  LCD_WriteData(0x00);
  LCD_WriteData(0xEF);
  /* Page Address Set */
  LCD_WriteCommand(LCD_PAGE_ADDR);
  LCD_WriteData(0x00);
  LCD_WriteData(0x00);
  LCD_WriteData(0x01);
  LCD_WriteData(0x3F);
  LCD_WriteCommand(LCD_INTERFACE);
  LCD_WriteData(0x01);
  LCD_WriteData(0x00);
  LCD_WriteData(0x06);
  
  LCD_WriteCommand(LCD_GRAM);
  HAL_Delay(200);
  
  LCD_WriteCommand(LCD_GAMMA);
  LCD_WriteData(0x01);
  
  LCD_WriteCommand(LCD_PGAMMA);
  LCD_WriteData(0x0F);
  LCD_WriteData(0x29);
  LCD_WriteData(0x24);
  LCD_WriteData(0x0C);
  LCD_WriteData(0x0E);
  LCD_WriteData(0x09);
  LCD_WriteData(0x4E);
  LCD_WriteData(0x78);
  LCD_WriteData(0x3C);
  LCD_WriteData(0x09);
  LCD_WriteData(0x13);
  LCD_WriteData(0x05);
  LCD_WriteData(0x17);
  LCD_WriteData(0x11);
  LCD_WriteData(0x00);
  LCD_WriteCommand(LCD_NGAMMA);
  LCD_WriteData(0x00);
  LCD_WriteData(0x16);
  LCD_WriteData(0x1B);
  LCD_WriteData(0x04);
  LCD_WriteData(0x11);
  LCD_WriteData(0x07);
  LCD_WriteData(0x31);
  LCD_WriteData(0x33);
  LCD_WriteData(0x42);
  LCD_WriteData(0x05);
  LCD_WriteData(0x0C);
  LCD_WriteData(0x0A);
  LCD_WriteData(0x28);
  LCD_WriteData(0x2F);
  LCD_WriteData(0x0F);
  
  LCD_WriteCommand(LCD_SLEEP_OUT);
  HAL_Delay(200);
  LCD_WriteCommand(LCD_DISPLAY_ON);
  /* GRAM start writing */
  LCD_WriteCommand(LCD_GRAM);
}

main.c

/* Includes ------------------------------------------------------------------*/
#include "main.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "lcd_ili9341.h"
/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */

/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/
LTDC_HandleTypeDef hltdc;

SPI_HandleTypeDef hspi5;

UART_HandleTypeDef huart1;

/* USER CODE BEGIN PV */

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_LTDC_Init(void);
static void MX_SPI5_Init(void);
static void MX_USART1_UART_Init(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
#define LCD_FRAMEBUFFER_SIZE (LCD_PIXEL_WIDTH * LCD_PIXEL_HEIGHT)
uint16_t frame_buffer[LCD_FRAMEBUFFER_SIZE];
/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{
  /* USER CODE BEGIN 1 */
	int color[] = {
				LCD_COLOR_WHITE,
				LCD_COLOR_BLACK,
				LCD_COLOR_GREY,
				LCD_COLOR_BLUE,
				LCD_COLOR_BLUE2,
				LCD_COLOR_RED,
				LCD_COLOR_MAGENTA,
				LCD_COLOR_GREEN,
				LCD_COLOR_CYAN,
				LCD_COLOR_YELLOW
		};
  /* USER CODE END 1 */
  

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_LTDC_Init();
  MX_SPI5_Init();
  MX_USART1_UART_Init();
  /* USER CODE BEGIN 2 */
  HAL_GPIO_WritePin(GPIOC, GPIO_PIN_2, GPIO_PIN_SET);
  LCD_PowerOn();
  HAL_LTDC_SetAddress(&hltdc, (uint32_t)frame_buffer, 0);
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
	for(int i=0; i<10; i++) {
		for(int j=0; j<LCD_FRAMEBUFFER_SIZE; j++) {
			frame_buffer[j] = color[i];
		}
		HAL_Delay(1000);
	}
  }
  /* USER CODE END 3 */
}