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Update double buffer example

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mrfaptastic 2021-08-19 19:39:08 +01:00
parent 055ff08fe5
commit 8dd6bf51b8
2 changed files with 65 additions and 83 deletions
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83
examples/DoubleBufferSwap/DoubleBufferSwap.ino
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@ -1,83 +0,0 @@
#include <ESP32-HUB75-MatrixPanel-I2S-DMA.h>
MatrixPanel_I2S_DMA *display = nullptr;
const byte row0 = 2+0*10;
const byte row1 = 2+1*10;
const byte row2 = 2+2*10;
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
// OK, now we can create our matrix object
display = new MatrixPanel_I2S_DMA(mxconfig);
display->begin(); // setup display with pins as per defined in the library
display->setTextColor(display->color565(255, 255, 255));
// Buffer 0 test
display->fillScreen(display->color565(128, 0, 0));
display->setCursor(3, row0);
display->print(F("Buffer 0"));
display->setCursor(3, row1);
display->print(F(" Buffer 0"));
Serial.println("Wrote to to Buffer 0");
display->showDMABuffer();
delay(1500);
// Buffer 1 test
display->flipDMABuffer();
display->fillScreen(display->color565(0, 128, 0)); // shouldn't see this
display->setCursor(3, row0);
display->print(F("Buffer 1"));
display->setCursor(3, row2);
display->print(F(" Buffer 1"));
Serial.println("Wrote to to Buffer 1");
display->showDMABuffer();
delay(1500);
}
void loop() {
// Flip the back buffer
display->flipDMABuffer();
// Write: Set bottow row to black
for (int y=20;y<MATRIX_HEIGHT; y++)
for (int x=0;x<MATRIX_WIDTH; x++)
{
display->drawPixelRGB888( x, y, 0, 0, 0);
}
// Write: Set bottom row to blue (this is what should show)
for (int y=20;y<MATRIX_HEIGHT; y++)
for (int x=0;x<MATRIX_WIDTH; x++)
{
display->drawPixelRGB888( x, y, 0, 0, 64);
}
// Now show this back buffer
display->showDMABuffer();
delay(1000);
// Flip back buffer
display->flipDMABuffer();
// Show this buffer
display->showDMABuffer();
delay(1000);
}

65
examples/SmoothDoubleBuffer/SmoothDoubleBuffer.ino Normal file
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@ -0,0 +1,65 @@
#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
display->setTextColor(display->color565(255, 255, 255));
start_x = display->width();
}
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->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->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;
}