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| // Set delay after plotting the sprite
#define DELAY 1000
// Width and height of sprite
#define WIDTH 128
#define HEIGHT 128
#include <TFT_eSPI.h> // Include the graphics library (this includes the sprite functions)
TFT_eSPI tft = TFT_eSPI(); // Declare object "tft"
TFT_eSprite spr = TFT_eSprite(&tft); // Declare Sprite object "spr" with pointer to "tft" object
void setup()
{
Serial.begin(250000);
Serial.println();
// Initialise the TFT registers
tft.init();
// Optionally set colour depth to 8 or 16 bits, default is 16 if not specified
// spr.setColorDepth(8);
// Create a sprite of defined size
spr.createSprite(WIDTH, HEIGHT);
// Clear the TFT screen to blue
tft.fillScreen(TFT_BLUE);
}
void loop(void)
{
// Fill the whole sprite with black (Sprite is in memory so not visible yet)
spr.fillSprite(TFT_BLACK);
// Number of pixels to draw
uint16_t n = 100;
// Draw 100 random colour pixels at random positions in sprite
while (n--)
{
uint16_t colour = random(0x10000); // Returns colour 0 - 0xFFFF
int16_t x = random(WIDTH); // Random x coordinate
int16_t y = random(HEIGHT); // Random y coordinate
spr.drawPixel( x, y, colour); // Draw pixel in sprite
}
// Draw some lines
spr.drawLine(1, 0, WIDTH, HEIGHT-1, TFT_GREEN);
spr.drawLine(0, 0, WIDTH, HEIGHT, TFT_GREEN);
spr.drawLine(0, 1, WIDTH-1, HEIGHT, TFT_GREEN);
spr.drawLine(0, HEIGHT-1, WIDTH-1, 0, TFT_RED);
spr.drawLine(0, HEIGHT, WIDTH, 0, TFT_RED);
spr.drawLine(1, HEIGHT, WIDTH, 1, TFT_RED);
// Draw some text with Middle Centre datum
spr.setTextDatum(MC_DATUM);
spr.drawString("Sprite", WIDTH / 2, HEIGHT / 2, 4);
// Now push the sprite to the TFT at position 0,0 on screen
spr.pushSprite(-40, -40);
spr.pushSprite(tft.width() / 2 - WIDTH / 2, tft.height() / 2 - HEIGHT / 2);
spr.pushSprite(tft.width() - WIDTH + 40, tft.height() - HEIGHT + 40);
delay(DELAY);
// Fill TFT screen with blue
tft.fillScreen(TFT_BLUE);
// Draw a blue rectangle in sprite so when we move it 1 pixel it does not leave a trail
// on the blue screen background
spr.drawRect(0, 0, WIDTH, HEIGHT, TFT_BLUE);
int x = tft.width() / 2 - WIDTH / 2;
int y = tft.height() / 2 - HEIGHT / 2;
uint32_t updateTime = 0; // time for next update
while (true)
{
// Random movement direction
int dx = 1; if (random(2)) dx = -1;
int dy = 1; if (random(2)) dy = -1;
// Pull it back onto screen if it wanders off
if (x < -WIDTH/2) dx = 1;
if (x >= tft.width()-WIDTH/2) dx = -1;
if (y < -HEIGHT/2) dy = 1;
if (y >= tft.height()-HEIGHT/2) dy = -1;
// Draw it 50 time, moving in random direct or staying still
n = 50;
int wait = random (50);
while (n)
{
if (updateTime <= millis())
{
// Use time delay so sprite does not move fast when not all on screen
updateTime = millis() + wait;
// Push the sprite to the TFT screen
spr.pushSprite(x, y);
// Change coord for next loop
x += dx;
y += dy;
n--;
yield(); // Stop watchdog reset
}
}
} // Infinite while, will not exit!
}
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