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mrfaptastic 2023-03-10 00:22:55 +00:00 committed by GitHub
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examples/SmoothDoubleBuffer/SmoothDoubleBuffer.ino
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#include <ESP32-HUB75-MatrixPanel-I2S-DMA.h>
MatrixPanel_I2S_DMA *display = nullptr;
const byte row0 = 2+0*11;
const byte row1 = 2+1*11;
const byte row2 = 2+2*11;
int start_x = 0;
int buffer_id = 0;
void setup()
{
// put your setup code here, to run once:
delay(1000);
Serial.begin(115200);
delay(200);
Serial.println("...Starting Display");
HUB75_I2S_CFG mxconfig;
mxconfig.double_buff = true; // Turn of double buffer
mxconfig.clkphase = true;
// OK, now we can create our matrix object
display = new MatrixPanel_I2S_DMA(mxconfig);
display->begin(); // setup display with pins as pre-defined in the library
start_x = display->width();
}
/*
This example draws a red square on one buffer only, and a green square on another buffer only.
It then flips between buffers as fast as possible whilst moving them as well - to give the impression they're both on screen at the same time!
The only thing that's painted to both buffers is a blue square.
*/
const int square_size = 16;
void loop()
{
display->flipDMABuffer();
//if ( !display->backbuffready() ) return;
//display->showDMABuffer();
display->clearScreen();
buffer_id ^= 1;
// Blue square on the left is printed to BOTH buffers.
display->fillRect(0, 0, square_size/2, square_size/2, display->color565(0,0,200));
start_x--;
if (buffer_id)
{
display->setCursor(3, row1);
display->setTextColor(display->color565(200, 0, 0));
display->fillRect(start_x, 6, square_size, square_size, display->color565(200,0,0));
//delay(40); // simulate slow drawing operation
}
else
{
display->setCursor(3, row2);
display->setTextColor(display->color565(0, 200, 0));
display->fillRect(10, start_x, square_size, square_size, display->color565(0,200,0));
}
display->printf("Buffer %d", buffer_id);
if (start_x < (-1*square_size)) start_x = display->width()+square_size;
}