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This commit is contained in:
David Gwilliam
2026-02-12 00:45:31 -08:00
commit 5f168f370b
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examples/LVGL_Arduino/Display_ST7789.cpp Normal file
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#include "Display_ST7789.h"
#define SPI_WRITE(_dat) SPI.transfer(_dat)
#define SPI_WRITE_Word(_dat) SPI.transfer16(_dat)
void SPI_Init()
{
SPI.begin(EXAMPLE_PIN_NUM_SCLK,EXAMPLE_PIN_NUM_MISO,EXAMPLE_PIN_NUM_MOSI);
}
void LCD_WriteCommand(uint8_t Cmd)
{
SPI.beginTransaction(SPISettings(SPIFreq, MSBFIRST, SPI_MODE0));
digitalWrite(EXAMPLE_PIN_NUM_LCD_CS, LOW);
digitalWrite(EXAMPLE_PIN_NUM_LCD_DC, LOW);
SPI_WRITE(Cmd);
digitalWrite(EXAMPLE_PIN_NUM_LCD_CS, HIGH);
SPI.endTransaction();
}
void LCD_WriteData(uint8_t Data)
{
SPI.beginTransaction(SPISettings(SPIFreq, MSBFIRST, SPI_MODE0));
digitalWrite(EXAMPLE_PIN_NUM_LCD_CS, LOW);
digitalWrite(EXAMPLE_PIN_NUM_LCD_DC, HIGH);
SPI_WRITE(Data);
digitalWrite(EXAMPLE_PIN_NUM_LCD_CS, HIGH);
SPI.endTransaction();
}
void LCD_WriteData_Word(uint16_t Data)
{
SPI.beginTransaction(SPISettings(SPIFreq, MSBFIRST, SPI_MODE0));
digitalWrite(EXAMPLE_PIN_NUM_LCD_CS, LOW);
digitalWrite(EXAMPLE_PIN_NUM_LCD_DC, HIGH);
SPI_WRITE_Word(Data);
digitalWrite(EXAMPLE_PIN_NUM_LCD_CS, HIGH);
SPI.endTransaction();
}
void LCD_WriteData_nbyte(uint8_t* SetData,uint8_t* ReadData,uint32_t Size)
{
SPI.beginTransaction(SPISettings(SPIFreq, MSBFIRST, SPI_MODE0));
digitalWrite(EXAMPLE_PIN_NUM_LCD_CS, LOW);
digitalWrite(EXAMPLE_PIN_NUM_LCD_DC, HIGH);
SPI.transferBytes(SetData, ReadData, Size);
digitalWrite(EXAMPLE_PIN_NUM_LCD_CS, HIGH);
SPI.endTransaction();
}
void LCD_Reset(void)
{
digitalWrite(EXAMPLE_PIN_NUM_LCD_CS, LOW);
delay(50);
digitalWrite(EXAMPLE_PIN_NUM_LCD_RST, LOW);
delay(50);
digitalWrite(EXAMPLE_PIN_NUM_LCD_RST, HIGH);
delay(50);
}
void LCD_Init(void)
{
pinMode(EXAMPLE_PIN_NUM_LCD_CS, OUTPUT);
pinMode(EXAMPLE_PIN_NUM_LCD_DC, OUTPUT);
pinMode(EXAMPLE_PIN_NUM_LCD_RST, OUTPUT);
Backlight_Init();
SPI_Init();
LCD_Reset();
//************* Start Initial Sequence **********//
LCD_WriteCommand(0x11);
delay(120);
LCD_WriteCommand(0x36);
if (HORIZONTAL)
LCD_WriteData(0x00);
else
LCD_WriteData(0x70);
LCD_WriteCommand(0x3A);
LCD_WriteData(0x05);
LCD_WriteCommand(0xB0);
LCD_WriteData(0x00);
LCD_WriteData(0xE8);
LCD_WriteCommand(0xB2);
LCD_WriteData(0x0C);
LCD_WriteData(0x0C);
LCD_WriteData(0x00);
LCD_WriteData(0x33);
LCD_WriteData(0x33);
LCD_WriteCommand(0xB7);
LCD_WriteData(0x35);
LCD_WriteCommand(0xBB);
LCD_WriteData(0x35);
LCD_WriteCommand(0xC0);
LCD_WriteData(0x2C);
LCD_WriteCommand(0xC2);
LCD_WriteData(0x01);
LCD_WriteCommand(0xC3);
LCD_WriteData(0x13);
LCD_WriteCommand(0xC4);
LCD_WriteData(0x20);
LCD_WriteCommand(0xC6);
LCD_WriteData(0x0F);
LCD_WriteCommand(0xD0);
LCD_WriteData(0xA4);
LCD_WriteData(0xA1);
LCD_WriteCommand(0xD6);
LCD_WriteData(0xA1);
LCD_WriteCommand(0xE0);
LCD_WriteData(0xF0);
LCD_WriteData(0x00);
LCD_WriteData(0x04);
LCD_WriteData(0x04);
LCD_WriteData(0x04);
LCD_WriteData(0x05);
LCD_WriteData(0x29);
LCD_WriteData(0x33);
LCD_WriteData(0x3E);
LCD_WriteData(0x38);
LCD_WriteData(0x12);
LCD_WriteData(0x12);
LCD_WriteData(0x28);
LCD_WriteData(0x30);
LCD_WriteCommand(0xE1);
LCD_WriteData(0xF0);
LCD_WriteData(0x07);
LCD_WriteData(0x0A);
LCD_WriteData(0x0D);
LCD_WriteData(0x0B);
LCD_WriteData(0x07);
LCD_WriteData(0x28);
LCD_WriteData(0x33);
LCD_WriteData(0x3E);
LCD_WriteData(0x36);
LCD_WriteData(0x14);
LCD_WriteData(0x14);
LCD_WriteData(0x29);
LCD_WriteData(0x32);
LCD_WriteCommand(0x21);
LCD_WriteCommand(0x11);
delay(120);
LCD_WriteCommand(0x29);
}
/******************************************************************************
function: Set the cursor position
parameter :
Xstart: Start uint16_t x coordinate
Ystart: Start uint16_t y coordinate
Xend : End uint16_t coordinates
Yend : End uint16_t coordinatesen
******************************************************************************/
void LCD_SetCursor(uint16_t Xstart, uint16_t Ystart, uint16_t Xend, uint16_t Yend)
{
if (HORIZONTAL) {
// set the X coordinates
LCD_WriteCommand(0x2A);
LCD_WriteData(Xstart >> 8);
LCD_WriteData(Xstart + Offset_X);
LCD_WriteData(Xend >> 8);
LCD_WriteData(Xend + Offset_X);
// set the Y coordinates
LCD_WriteCommand(0x2B);
LCD_WriteData(Ystart >> 8);
LCD_WriteData(Ystart + Offset_Y);
LCD_WriteData(Yend >> 8);
LCD_WriteData(Yend + Offset_Y);
}
else {
// set the X coordinates
LCD_WriteCommand(0x2A);
LCD_WriteData(Ystart >> 8);
LCD_WriteData(Ystart + Offset_Y);
LCD_WriteData(Yend >> 8);
LCD_WriteData(Yend + Offset_Y);
// set the Y coordinates
LCD_WriteCommand(0x2B);
LCD_WriteData(Xstart >> 8);
LCD_WriteData(Xstart + Offset_X);
LCD_WriteData(Xend >> 8);
LCD_WriteData(Xend + Offset_X);
}
LCD_WriteCommand(0x2C);
}
/******************************************************************************
function: Refresh the image in an area
parameter :
Xstart: Start uint16_t x coordinate
Ystart: Start uint16_t y coordinate
Xend : End uint16_t coordinates
Yend : End uint16_t coordinates
color : Set the color
******************************************************************************/
void LCD_addWindow(uint16_t Xstart, uint16_t Ystart, uint16_t Xend, uint16_t Yend,uint16_t* color)
{
// uint16_t i,j;
// LCD_SetCursor(Xstart, Ystart, Xend,Yend);
// uint16_t Show_Width = Xend - Xstart + 1;
// uint16_t Show_Height = Yend - Ystart + 1;
// for(i = 0; i < Show_Height; i++){
// for(j = 0; j < Show_Width; j++){
// LCD_WriteData_Word(color[(i*(Show_Width))+j]);
// }
// }
uint16_t Show_Width = Xend - Xstart + 1;
uint16_t Show_Height = Yend - Ystart + 1;
uint32_t numBytes = Show_Width * Show_Height * sizeof(uint16_t);
uint8_t Read_D[numBytes];
LCD_SetCursor(Xstart, Ystart, Xend, Yend);
LCD_WriteData_nbyte((uint8_t*)color, Read_D, numBytes);
}
// backlight
void Backlight_Init(void)
{
ledcAttach(EXAMPLE_PIN_NUM_BK_LIGHT, Frequency, Resolution);
ledcWrite(EXAMPLE_PIN_NUM_BK_LIGHT, 100);
}
void Set_Backlight(uint8_t Light) //
{
if(Light > 100 || Light < 0)
printf("Set Backlight parameters in the range of 0 to 100 \r\n");
else{
uint32_t Backlight = Light*10;
ledcWrite(EXAMPLE_PIN_NUM_BK_LIGHT, Backlight);
}
}