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#include "ILI9341_STM32_Driver.h"
#include "SPI.h"
/* Global Variables ------------------------------------------------------------------*/
volatile uint16_t LCD_HEIGHT = ILI9341_SCREEN_HEIGHT;
volatile uint16_t LCD_WIDTH = ILI9341_SCREEN_WIDTH;
static volatile bool g_transfer_complete = false;
/* SPI callback function */
void spi_callback(spi_callback_args_t *p_args)
{
if (SPI_EVENT_TRANSFER_COMPLETE == p_args->event)
{
g_transfer_complete = true;
}
}
/* Initialize SPI */
void ILI9341_SPI_Init(void)
{
fsp_err_t err = FSP_SUCCESS;
R_IOPORT_PinWrite(&g_ioport_ctrl, LCDRESET, BSP_IO_LEVEL_HIGH);
R_IOPORT_PinWrite(&g_ioport_ctrl, LCDCS, BSP_IO_LEVEL_HIGH);
/* Initialize SPI driver */
err = SPI_Init();
if (FSP_SUCCESS != err)
{
// SPI module initialization failed
}
}
/* Send data (char) to LCD */
void ILI9341_SPI_Send(unsigned char SPI_Data)
{
fsp_err_t err = FSP_SUCCESS;
static uint8_t g_master_tx_buff[1]; // Master Transmit Buffer
g_master_tx_buff[0] = SPI_Data;
/* Master send data to Slave */
err = R_SPI_Write(&g_spi0_ctrl, g_master_tx_buff, 1, SPI_BIT_WIDTH_8_BITS);
/* Error handling */
if (FSP_SUCCESS != err)
{
}
}
/* Send command (char) to LCD */
void ILI9341_Write_Command(uint8_t Command)
{
R_IOPORT_PinWrite(&g_ioport_ctrl, LCDCS, BSP_IO_LEVEL_LOW);
R_BSP_SoftwareDelay(5, BSP_DELAY_UNITS_MICROSECONDS);
ILI9341_SPI_Send(Command);
R_BSP_SoftwareDelay(30, BSP_DELAY_UNITS_MICROSECONDS);
R_IOPORT_PinWrite(&g_ioport_ctrl, LCDCS, BSP_IO_LEVEL_HIGH);
}
/* Send Data (char) to LCD */
void ILI9341_Write_Data(uint8_t Data)
{
R_IOPORT_PinWrite(&g_ioport_ctrl, LCDCS, BSP_IO_LEVEL_LOW);
R_BSP_SoftwareDelay(5, BSP_DELAY_UNITS_MICROSECONDS);
ILI9341_SPI_Send(Data);
R_BSP_SoftwareDelay(30, BSP_DELAY_UNITS_MICROSECONDS);
R_IOPORT_PinWrite(&g_ioport_ctrl, LCDCS, BSP_IO_LEVEL_HIGH);
}
/* Set Address - Location block - to draw into */
void ILI9341_Set_Address(uint16_t X1, uint16_t Y1, uint16_t X2, uint16_t Y2)
{
ILI9341_Write_Command(0x2A);
ILI9341_Write_Data((uint8_t)(X1 >> 8));
ILI9341_Write_Data((uint8_t)X1);
ILI9341_Write_Data((uint8_t)(X2 >> 8));
ILI9341_Write_Data((uint8_t)X2);
ILI9341_Write_Command(0x2B);
ILI9341_Write_Data((uint8_t)(Y1 >> 8));
ILI9341_Write_Data((uint8_t)Y1);
ILI9341_Write_Data((uint8_t)(Y2 >> 8));
ILI9341_Write_Data((uint8_t)Y2);
ILI9341_Write_Command(0x2C);
}
/* HARDWARE RESET */
void ILI9341_Reset(void)
{
R_IOPORT_PinWrite(&g_ioport_ctrl, LCDRESET, BSP_IO_LEVEL_LOW);
R_BSP_SoftwareDelay(200, BSP_DELAY_UNITS_MILLISECONDS);
R_IOPORT_PinWrite(&g_ioport_ctrl, LCDCS, BSP_IO_LEVEL_LOW);
R_BSP_SoftwareDelay(200, BSP_DELAY_UNITS_MILLISECONDS);
R_IOPORT_PinWrite(&g_ioport_ctrl, LCDRESET, BSP_IO_LEVEL_HIGH);
R_BSP_SoftwareDelay(200, BSP_DELAY_UNITS_MILLISECONDS);
R_IOPORT_PinWrite(&g_ioport_ctrl, LCDCS, BSP_IO_LEVEL_LOW);
}
/* Set rotation of the screen - changes x0 and y0 */
void ILI9341_Set_Rotation(uint8_t Rotation)
{
uint8_t screen_rotation = Rotation;
ILI9341_Write_Command(0x36);
R_BSP_SoftwareDelay(1, BSP_DELAY_UNITS_MILLISECONDS);
switch (screen_rotation)
{
case SCREEN_VERTICAL_1:
ILI9341_Write_Data(0x40 | 0x08);
LCD_WIDTH = 240;
LCD_HEIGHT = 320;
break;
case SCREEN_HORIZONTAL_1:
ILI9341_Write_Data(0x20 | 0x08);
LCD_WIDTH = 320;
LCD_HEIGHT = 240;
break;
case SCREEN_VERTICAL_2:
ILI9341_Write_Data(0x80 | 0x08);
LCD_WIDTH = 240;
LCD_HEIGHT = 320;
break;
case SCREEN_HORIZONTAL_2:
ILI9341_Write_Data(0x40 | 0x80 | 0x20 | 0x08);
LCD_WIDTH = 320;
LCD_HEIGHT = 240;
break;
default:
// Exit if screen rotation not valid!
break;
}
}
/* Enable LCD display */
void ILI9341_Enable(void)
{
R_IOPORT_PinWrite(&g_ioport_ctrl, LCDRESET, BSP_IO_LEVEL_HIGH);
}
/* Initialize LCD display */
void ILI9341_Init(void)
{
ILI9341_Enable();
ILI9341_SPI_Init();
ILI9341_Reset();
// SOFTWARE RESET
R_IOPORT_PinWrite(&g_ioport_ctrl, LCDCS, BSP_IO_LEVEL_HIGH);
ILI9341_Write_Command(0x01);
R_BSP_SoftwareDelay(1000, BSP_DELAY_UNITS_MILLISECONDS);
// POWER CONTROL A
ILI9341_Write_Command(0xCB);
ILI9341_Write_Data(0x39);
ILI9341_Write_Data(0x2C);
ILI9341_Write_Data(0x00);
ILI9341_Write_Data(0x34);
ILI9341_Write_Data(0x02);
// POWER CONTROL B
ILI9341_Write_Command(0xCF);
ILI9341_Write_Data(0x00);
ILI9341_Write_Data(0xC1);
ILI9341_Write_Data(0x30);
// DRIVER TIMING CONTROL A
ILI9341_Write_Command(0xE8);
ILI9341_Write_Data(0x85);
ILI9341_Write_Data(0x00);
ILI9341_Write_Data(0x78);
// DRIVER TIMING CONTROL B
ILI9341_Write_Command(0xEA);
ILI9341_Write_Data(0x00);
ILI9341_Write_Data(0x00);
// POWER ON SEQUENCE CONTROL
ILI9341_Write_Command(0xED);
ILI9341_Write_Data(0x64);
ILI9341_Write_Data(0x03);
ILI9341_Write_Data(0x12);
ILI9341_Write_Data(0x81);
// PUMP RATIO CONTROL
ILI9341_Write_Command(0xF7);
ILI9341_Write_Data(0x20);
// POWER CONTROL, VRH[5:0]
ILI9341_Write_Command(0xC0);
ILI9341_Write_Data(0x23);
// POWER CONTROL, SAP[2:0]; BT[3:0]
ILI9341_Write_Command(0xC1);
ILI9341_Write_Data(0x10);
// VCM CONTROL
ILI9341_Write_Command(0xC5);
ILI9341_Write_Data(0x3E);
ILI9341_Write_Data(0x28);
// VCM CONTROL 2
ILI9341_Write_Command(0xC7);
ILI9341_Write_Data(0x86);
// MEMORY ACCESS CONTROL
ILI9341_Write_Command(0x36);
ILI9341_Write_Data(0x48);
// PIXEL FORMAT
ILI9341_Write_Command(0x3A);
ILI9341_Write_Data(0x66); // 18-bit color format
// FRAME RATIO CONTROL, STANDARD RGB COLOR
ILI9341_Write_Command(0xB1);
ILI9341_Write_Data(0x00);
ILI9341_Write_Data(0x18);
// DISPLAY FUNCTION CONTROL
ILI9341_Write_Command(0xB6);
ILI9341_Write_Data(0x08);
ILI9341_Write_Data(0x82);
ILI9341_Write_Data(0x27);
// 3GAMMA FUNCTION DISABLE
ILI9341_Write_Command(0xF2);
ILI9341_Write_Data(0x00);
// GAMMA CURVE SELECTED
ILI9341_Write_Command(0x26);
ILI9341_Write_Data(0x01);
// POSITIVE GAMMA CORRECTION
ILI9341_Write_Command(0xE0);
ILI9341_Write_Data(0x0F);
ILI9341_Write_Data(0x31);
ILI9341_Write_Data(0x2B);
ILI9341_Write_Data(0x0C);
ILI9341_Write_Data(0x0E);
ILI9341_Write_Data(0x08);
ILI9341_Write_Data(0x4E);
ILI9341_Write_Data(0xF1);
ILI9341_Write_Data(0x37);
ILI9341_Write_Data(0x07);
ILI9341_Write_Data(0x10);
ILI9341_Write_Data(0x03);
ILI9341_Write_Data(0x0E);
ILI9341_Write_Data(0x09);
ILI9341_Write_Data(0x00);
// NEGATIVE GAMMA CORRECTION
ILI9341_Write_Command(0xE1);
ILI9341_Write_Data(0x00);
ILI9341_Write_Data(0x0E);
ILI9341_Write_Data(0x14);
ILI9341_Write_Data(0x03);
ILI9341_Write_Data(0x11);
ILI9341_Write_Data(0x07);
ILI9341_Write_Data(0x31);
ILI9341_Write_Data(0xC1);
ILI9341_Write_Data(0x48);
ILI9341_Write_Data(0x08);
ILI9341_Write_Data(0x0F);
ILI9341_Write_Data(0x0C);
ILI9341_Write_Data(0x31);
ILI9341_Write_Data(0x36);
ILI9341_Write_Data(0x0F);
// EXIT SLEEP
ILI9341_Write_Command(0x11);
R_BSP_SoftwareDelay(120, BSP_DELAY_UNITS_MILLISECONDS);
// TURN ON DISPLAY
ILI9341_Write_Command(0x29);
// STARTING ROTATION
ILI9341_Set_Rotation(SCREEN_VERTICAL_1);
}
/* Draw color to the entire screen */
void ILI9341_Fill_Screen(uint16_t Colour)
{
ILI9341_Set_Address(0, 0, LCD_WIDTH - 1, LCD_HEIGHT - 1);
ILI9341_Draw_Colour_Burst(Colour, LCD_WIDTH * LCD_HEIGHT);
}
/* Draw color burst */
void ILI9341_Draw_Colour_Burst(uint16_t Colour, uint32_t Size)
{
uint8_t burst_buffer[3] = {Colour >> 16, Colour >> 8, Colour}; // 18-bit color
R_IOPORT_PinWrite(&g_ioport_ctrl, LCDCS, BSP_IO_LEVEL_LOW);
for (uint32_t i = 0; i < Size; i++)
{
ILI9341_SPI_Send(burst_buffer[0]);
ILI9341_SPI_Send(burst_buffer[1]);
ILI9341_SPI_Send(burst_buffer[2]);
}
R_IOPORT_PinWrite(&g_ioport_ctrl, LCDCS, BSP_IO_LEVEL_HIGH);
}
/* Draw pixel */
void ILI9341_Draw_Pixel(uint16_t X, uint16_t Y, uint16_t Colour)
{
if ((X >= LCD_WIDTH) || (Y >= LCD_HEIGHT)) return;
ILI9341_Set_Address(X, Y, X, Y);
ILI9341_Draw_Colour_Burst(Colour, 1);
}
/* Main function */
int main(void)
{
ILI9341_Init();
// Fill screen with a solid color
ILI9341_Fill_Screen(0xF800); // Red
// Draw a single pixel (example)
ILI9341_Draw_Pixel(120, 160, 0x07E0); // Green pixel at (120, 160)
while (1)
{
// Main loop
}
}
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