Hi, I am trying to interface with a 3.5-inch ILI9488 TFT display (without touch) on an STM32H563ZIT6 microcontroller. I'm attempting to write a test function to fill the entire screen with a solid red color, but it's not working. Could anyone please help me? I will attach my code. How can I verify that SPI is properly working with the TFT?
#include "main.h"
SPI_HandleTypeDef hspi2;
UART_HandleTypeDef huart7;
#define ILI9488_CMD_MEMORY_WRITE 0x2C
#define ILI9488_CMD_MEMORY_ACCESS_CTRL 0x36
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_ICACHE_Init(void);
static void MX_SPI2_Init(void);
static void MX_UART7_Init(void);
void ILI9488_FillScreen(uint16_t color);
void ILI9488_SendData(uint8_t data);
void ILI9488_SendCommand(uint8_t cmd);
void ILI9488_Init(void);
void testFillScreen(uint16_t color);
#define WIDTH 320
#define HEIGHT 480
#define CS_PORT GPIOB
#define CS_PIN GPIO_PIN_12
#define DC_PORT GPIOE
#define DC_PIN GPIO_PIN_4
#define RESET_PORT GPIOE
#define RESET_PIN GPIO_PIN_2
uint8_t tx_buffer[50];
int uart_buffer_len;
char spi_buffer[20];
int main(void)
{
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* Configure the system clock */
SystemClock_Config();
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_ICACHE_Init();
MX_SPI2_Init();
MX_UART7_Init();
ILI9488_Init();
// Test filling screen with red color
ILI9488_FillScreen(0xF800); // Red color in 16-bit RGB
while (1)
{
}
}
void ILI9488_Init(void)
{
// Reset display
ILI9488_SendCommand(0x01); // Software Reset
HAL_Delay(150);
ILI9488_SendCommand(0x11); // Sleep Out
HAL_Delay(150);
ILI9488_SendCommand(0x29); // Display On
}
void ILI9488_SendCommand(uint8_t cmd)
{
HAL_GPIO_WritePin(GPIOE, GPIO_PIN_4, GPIO_PIN_RESET); // DC low for command
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_12, GPIO_PIN_RESET); // CS low
HAL_SPI_Transmit(&hspi2, &cmd, 1, HAL_MAX_DELAY);
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_12, GPIO_PIN_SET); // CS high
}
void ILI9488_FillScreen(uint16_t color)
{
uint8_t highByte = color >> 8;
uint8_t lowByte = color & 0xFF;
ILI9488_SendCommand(0x2C); // Memory Write
for (int i = 0; i < WIDTH * HEIGHT; i++)
{
ILI9488_SendData(highByte);
ILI9488_SendData(lowByte);
}
}
void ILI9488_SendData(uint8_t data)
{
HAL_GPIO_WritePin(GPIOE, GPIO_PIN_4, GPIO_PIN_SET); // DC high for data
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_12, GPIO_PIN_RESET); // CS low
HAL_SPI_Transmit(&hspi2, &data, 1, HAL_MAX_DELAY);
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_12, GPIO_PIN_SET); // CS high
}
