32F429IDISCOVERY TFT-LCD에 다양한 색 출력하기 - 2

1. CubeMX에서 UART, SPI5, LTDC를 설정해야 한다

 

 

SPI5번과 TFT가 연결되었음을 알 수 있다. 연결 전에 Clock 설정을 다음과 같이 해주어야만 한다

 

 

 

그리고 가장 중요한 것이 DOTCLK가 6MHz의 클럭으로 동작해야한다

 

 

SPI5번을 설정하고 분주비를 16으로 맞춰주도록 한다

 

 

SPI에 사용되는 SS핀과 추가적으로 데이터와 명령어를 구분하는 D/CX핀도 따로 연결해야므로 반드시 PC2와 PD13을 출력으로 설정하도록 한다

 

 

다음은 LTDC 설정을 하는데, 먼저 TFT쪽을 보면 다음과 같이 주어진 SYNC에 맞춰서 동작시킬 수 있다

 

 

 

 

 

그리고 코드를 생성한다. 코드에 추가할 내용은 10가지 컬러를 생성하고, 1초마다 GRAM으로 설정된 frame 버퍼에 10가지 컬러를 순차적으로 띄우는 작업이다

 

	#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);
	}

view raw lcd_ili9341.c hosted with ❤ by GitHub

	/* 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 */
	}

view raw main.c hosted with ❤ by GitHub