Example Code for Arduino-basic display
This is a basic display sample, including drawing points, lines, circles, rectangles and etc.
Hardware Preparation
- Arduino UNO control board x1
- 2.8" 240x320 LCD display module x1
- Wires
Software Preparation
- Arduino IDE, click to download
- About how to install the library
- DFRobot_GDL API interface function , click to learn more
- The GDI interface should be used in conjunction with the main control board with GDI interface
- It is recommended to use Arduino 1.8.10 and above
- If the SD card slot is in poor contact, it may fail to initialize. Try agian after unplugging and plugging
Wiring Diagram
- All the demos of this product are all stored in the DFRobot_GDL->example->basic file
- Before burning the demo, please open the corresponding materialized function (DFRobot_ST7789_240x320_HW_SPI）
Sample Code
/*!
* @file basicTest.ino
* @brief Demonstrate various graphic painting effects
* @n This demo supports Arduino Uno, Leonardo, Mega2560, FireBeetle-ESP32, FireBeetle-ESP8266, and FireBeetle-M0.
* @copyright Copyright (c) 2010 DFRobot Co. Ltd (http://www.dfrobot.com)
* @licence The MIT License (MIT)
* @author [LuoYufeng] ([email protected])
* @version V0.1
* @date 2020-01-07
* @url https://github.com/DFRobot/DFRobot_GDL
*/
#include "DFRobot_GDL.h"
/*M0*/
#if defined ARDUINO_SAM_ZERO
#define TFT_DC 7
#define TFT_CS 5
#define TFT_RST 6
/*ESP32 and ESP8266*/
#elif defined(ESP32) || defined(ESP8266)
#define TFT_DC D2
#define TFT_CS D6
#define TFT_RST D3
/*AVR series mainboard*/
#else
#define TFT_DC 2
#define TFT_CS 3
#define TFT_RST 4
#endif
/**
* @brief Constructor Constructor of hardware SPI communication
* @param dc Command/data line pin for SPI communication
* @param cs Chip select pin for SPI communication
* @param rst reset pin of the screen
*/
//DFRobot_ST7789_240x240_HW_SPI screen(/*dc=*/TFT_DC,/*cs=*/TFT_CS,/*rst=*/TFT_RST);
//DFRobot_ST7789_240x320_HW_SPI screen(/*dc=*/TFT_DC,/*cs=*/TFT_CS,/*rst=*/TFT_RST);
//DFRobot_ILI9341_240x320_HW_SPI screen(/*dc=*/TFT_DC,/*cs=*/TFT_CS,/*rst=*/TFT_RST);
//DFRobot_ILI9488_320x480_HW_SPI screen(/*dc=*/TFT_DC,/*cs=*/TFT_CS,/*rst=*/TFT_RST);
/* M0 mainboard DMA transfer */
//DFRobot_ST7789_240x240_DMA_SPI screen(/*dc=*/TFT_DC,/*cs=*/TFT_CS,/*rst=*/TFT_RST);
//DFRobot_ST7789_240x320_DMA_SPI screen(/*dc=*/TFT_DC,/*cs=*/TFT_CS,/*rst=*/TFT_RST);
//DFRobot_ILI9341_240x320_DMA_SPI screen(/*dc=*/TFT_DC,/*cs=*/TFT_CS,/*rst=*/TFT_RST);
//DFRobot_ILI9488_320x480_DMA_SPI screen(/*dc=*/TFT_DC,/*cs=*/TFT_CS,/*rst=*/TFT_RST);
/*
*User-selectable macro definition color
*COLOR_RGB565_BLACK COLOR_RGB565_NAVY COLOR_RGB565_DGREEN COLOR_RGB565_DCYAN
*COLOR_RGB565_MAROON COLOR_RGB565_PURPLE COLOR_RGB565_OLIVE COLOR_RGB565_LGRAY
*COLOR_RGB565_DGRAY COLOR_RGB565_BLUE COLOR_RGB565_GREEN COLOR_RGB565_CYAN
*COLOR_RGB565_RED COLOR_RGB565_MAGENTA COLOR_RGB565_YELLOW COLOR_RGB565_ORANGE
*COLOR_RGB565_WHITE
*/
void setup() {
Serial.begin(115200);
screen.begin();
}
void loop(){
testDrawPixel();
testLine();
testFastLines(COLOR_RGB565_PURPLE,COLOR_RGB565_YELLOW);
testRects(COLOR_RGB565_BLACK,COLOR_RGB565_WHITE);
testRoundRects();
testCircles(24,COLOR_RGB565_BLUE);
testTriangles(COLOR_RGB565_YELLOW);
testPrint();
}
/* Test to draw a pixel*/
void testDrawPixel() {
//Clear screen
screen.fillScreen(COLOR_RGB565_BLACK);
int x = 0;
int y = screen.height();
for(int i = 0; i <= screen.width()/2; i += 10){
for (x = screen.width() - i; x >= i; x-=10 ){
/*
* @ brief draw a pixel
* @ param x coordinate
* y coordinate
* c pixel color
*/
screen.drawPixel(x, y, COLOR_RGB565_ORANGE);
delay(10);
}
for (y = screen.height() - i; y >= i; y-=10){
screen.drawPixel(x, y, COLOR_RGB565_ORANGE);
delay(10);
}
for (x = i; x <= screen.width() - i + 1; x+=10 ){
screen.drawPixel(x, y, COLOR_RGB565_ORANGE);
delay(10);
}
for (y = i; y <= screen.height() - i + 1; y+=10){
screen.drawPixel(x, y, COLOR_RGB565_ORANGE);
delay(10);
}
}
}
/* Test to draw a line*/
void testLine(){
// 0x00FF is the color data in the format of RGB565
uint16_t color = 0x00FF;
screen.fillScreen(COLOR_RGB565_BLACK);
for (int16_t x=0; x < screen.width(); x+=6) {
/*
* @ brief draw a line
* @ param x0 The x-coordinate of the first vertex
* y0 The y-coordinate of the first vertex
* x1 The x-coordinate of the second vertex
* y1 The y-coordinate of the second vertex
* c line color
*/
screen.drawLine(/*x0=*/screen.width()/*Screen width*//2, /*y0=*/screen.height()/*Screen height*//2, /*x1=*/x, /*y1=*/0, /*c=*/color+=0x0700);
}
for (int16_t y=0; y < screen.height(); y+=6) {
screen.drawLine(screen.width()/2, screen.height()/2, screen.width(), y, color+=0x0700);
}
for (int16_t x = screen.width(); x >= 0; x-=6) {
screen.drawLine(screen.width()/2, screen.height()/2, x,screen.height(), color+=0x0700);
}
for (int16_t y = screen.height(); y >= 0; y-=6) {
screen.drawLine(screen.width()/2, screen.height()/2, 0, y, color+=0x0700);
}
}
/* Test to fast draw line(need to set delay), only horizontal line and vertical line */
void testFastLines(uint16_t color1, uint16_t color2) {
for (int16_t y=0; y < screen.height(); y+=4) {
/*
* @ brief draw a line
* @ param x The x-coordinate of the first vertex
* y The y-coordinate of the first vertex
* w Length of line segment
* c line color
*/
screen.drawFastHLine(/*x=*/0, /*y=*/y, /*w=*/screen.width(),/*c=*/color2);
delay(10);
}
for(int16_t x=0; x < screen.width(); x+=3) {
/*
* @ brief draw a line
* @ param x The x-coordinate of the first vertex
* y The y-coordinate of the first vertex
* h length of line segment
* c line color
*/
screen.drawFastVLine(/*x=*/x, /*y=*/0, /*h=*/screen.height(), /*c=*/color1);
delay(10);
}
}
/* Test to draw a rectangle*/
void testRects(uint16_t color1, uint16_t color2) {
screen.fillScreen(COLOR_RGB565_BLACK);
int16_t x=screen.width()-12;
for (; x > 100; x-=screen.width()/40) {
/*
* @ brief draw a hollow rectangle
* @ param x The x-coordinate of the vertex
* @ param y The y-coordinate of the vertex
* @ param w horizontal side length
* @ param h longitudinal side length
* @ param color Fill color, RGB color with 565 structure
*/
screen.drawRect(/*x=*/screen.width()/2 -x/2, /*y=*/screen.height()/2 -x/2 , /*w=*/x, /*h=*/x, /*color=*/color2+=0x0F00);
delay(100);
}
/*
* @ brief draw a filled rectangle
* @ param x The x-coordinate of the vertex
* @ param y The y-coordinate of the vertex
* @ param w horizontal side length
* @ param h longitudinal side length
* @ param color Fill color, RGB color with 565 structure
*/
screen.fillRect(/*x=*/screen.width()/2 -x/2, /*y=*/screen.height()/2 -x/2 , /*w=*/x, /*h=*/x, /*color=*/color2);
delay(100);
for(; x > 6; x-=screen.width()/40){
screen.drawRect(screen.width()/2 -x/2, screen.height()/2 -x/2 , x, x, color1);
delay(100);
}
}
/* Test to draw a rounded rectangle */
void testRoundRects() {
screen.fillScreen(COLOR_RGB565_BLACK);
// 0xF00F is the color data in the format of RGB565
int color = 0xF00F;
int i;
int x = 0;
int y = 0;
int w = screen.width()-3;
int h = screen.height()-3;
for(i = 0 ; i <= 16; i+=2) {
/*
* @ brief Draw a hollow rounded rectangle
* @ param x0 The x-coordinate of the start vertex
* @ param y0 The y-coordinate of the start vertex
* @ param w horizontal side length
* @ param h longitudinal side length
* @ param radius Round corner radius
* @ param color border color, 565 structure RGB color
*/
screen.drawRoundRect(/*x0=*/x, /*y0=*/y, /*w=*/w, /*h=*/h, /*radius=*/20, /*color=*/color);
x+=5;
y+=5;
w-=10;
h-=10;
color+=0x0100;
delay(50);
}
for(i = 0 ; i <= 16; i+=2) {
/*
* @ brief Draw a filled and rounded rectangle
* @ param x0 The x-coordinate of the start vertex
* @ param y0 The y-coordinate of the start vertex
* @ param w horizontal side length
* @ param h longitudinal side length
* @ param radius Round corner radius
* @ param color Fill color, RGB color with 565 structure
*/
screen.fillRoundRect(/*x0=*/x, /*y0=*/y, /*w=*/w, /*h=*/h, /*radius=*/10, /*color=*/color);
x+=5;
y+=5;
w-=10;
h-=10;
color+=0x0500;
delay(50);
}
}
/* Test to draw a circle */
void testCircles(uint8_t radius, uint16_t color) {
screen.fillScreen(COLOR_RGB565_BLACK);
for (int16_t x=radius; x <=screen.width()-radius; x+=radius*2) {
for (int16_t y=radius; y <=screen.height()-radius; y+=radius*2) {
/*
* @ brief Draw a hollow circle
* @ param x0 The x-coordinate of the center point
* @ param y0 The y-coordinate of the center point
* @ param r radius
* @ param color Circle color, RGB color with 565 structure
*/
screen.drawCircle(/*x0=*/x, /*y0=*/y, /*r=*/radius, /*color=*/color);
if(x == y ||x == -y ||x == y + 2*radius)
/*
* @ brief Draw a filled circle
* @ param x0 The x-coordinate of the center point
* @ param y0 The y-coordinate of the center point
* @ param r radius
* @ param color Fill color, RGB color with 565 structure
*/
screen.fillCircle(/*x0=*/x, /*y0=*/y, /*r=*/radius, /*color=*/color);
color += 800;
delay(100);
}
}
}
/* Test to draw a triangle */
void testTriangles(uint16_t color){
screen.fillScreen(COLOR_RGB565_BLACK);
for (int16_t i=0; i <=screen.width(); i+=24)
/*
* @ brief Draw a hollow triangle
* @ param x0 The x-coordinate of the start vertex
* @ param y0 The y-coordinate of the start vertex
* @ param x1 The x-coordinate of the second vertex
* @ param y1 The y-coordinate of the second vertex
* @ param x2 The x-coordinate of the third vertex
* @ param y2 The y-coordinate of the third vertex
* @ param color border color, 565 structure RGB color
*/
screen.drawTriangle(/*x0=*/i,/*y0=*/0,/*x1=*/0,/*y1=*/screen.height()-i,/*x2=*/screen.width()-i,/*y2=*/screen.height(), /*color=*/color);
for (int16_t i=0; i <screen.width(); i+=24)
screen.drawTriangle(screen.width(),i*4/3,0,screen.height()-i*4/3,i,0, color);
for (int16_t i=0; i <screen.width(); i+=24)
screen.drawTriangle(screen.width(),i*4/3,i,0,screen.width()-i,screen.height(), color);
color = COLOR_RGB565_RED;
for (int16_t i=0; i <=screen.width(); i+=24)
/*
* @ brief Draw a filled triangle
* @ param x0 The x-coordinate of the start vertex
* @ param y0 The y-coordinate of the start vertex
* @ param x1 The x-coordinate of the second vertex
* @ param y1 The y-coordinate of the second vertex
* @ param x2 The x-coordinate of the third vertex
* @ param y2 The y-coordinate of the third vertex
* @ param color Fill color, RGB color with 565 structure
*/
screen.fillTriangle(/*x0=*/i,/*y0=*/0,/*x1=*/0,/*y1=*/screen.height()-i,/*x2=*/screen.width()-i,/*y2=*/screen.height(), /*color=*/color+=100);
for (int16_t i=0; i <screen.width(); i+=24)
screen.fillTriangle(screen.width(),i*4/3,0,screen.height()-i*4/3,i,0, color+=100);
for (int16_t i=0; i <screen.width(); i+=24)
screen.fillTriangle(screen.width(),i*4/3,i,0,screen.width()-i,screen.height(), color+=100);
}
void testPrint() {
// 0x00FF is the color data in the format of RGB565
int16_t color = 0x00FF;
// Set text wrapping mode
// true = Text word wrap, false = No word wrap
screen.setTextWrap(false);
//Fill color, RGB color with 565 structure
screen.fillScreen(COLOR_RGB565_BLACK);
//Set the coordinate position x = 0, y = 50
screen.setCursor(0, 50);
//Set the text color; this is a changeable value
screen.setTextColor(color+=0x3000);
//Set text size to 0
screen.setTextSize(0);
//Output text
screen.println("Hello World!");
screen.setTextColor(color+=0x3000);
//Set text size to 1
screen.setTextSize(1);
screen.println("Hello World!");
screen.setTextColor(color+=0x3000);
//Set text size to 2
screen.setTextSize(2);
screen.println("Hello World!");
screen.setTextColor(color+=0x3000);
//Set text size to 3
screen.setTextSize(3);
screen.println("Hello World!");
screen.setTextColor(color+=0x3000);
//Set text size to 4
screen.setTextSize(4);
screen.println("Hello!");
//Set text size to 5
screen.setTextSize(5);
screen.print("Hello!");
delay(2000);
//Set coordinate position x = 0, y = 0
screen.setCursor(0, 0);
//Fill color, RGB color with 565 structure
screen.fillScreen(COLOR_RGB565_BLACK);
screen.setTextSize(2);
screen.setTextColor(color+=0x3000);
screen.print("a = ");
screen.setTextColor(color+=0x3000);
int a = 1234;
screen.println(a, 1);
screen.setTextColor(color+=0x3000);
screen.print(8675309, HEX);
screen.println("this is HEX!");
screen.println("");
screen.setTextColor(color+=0x0F00);
screen.println("running for: ");
screen.setTextColor(color+=0x0F00);
//Output time in millisecond
screen.print(millis());
screen.setTextColor(color+=0x0F00);
screen.println("/1000 seconds.");
char *text = "Hi DFRobot!";
screen.setTextColor(color+=0x0F00);
screen.setTextWrap(true);
screen.setTextSize(3);
screen.println(text);
//screen.setFonts((const gdl_Font_t *)SIMKAIFont18ptBitmaps);
screen.println(text);
delay(2000);
}
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