ESP32-HUB75-MatrixPanel-DMA/examples/DoubleBufferSwap/DoubleBufferSwap.ino
mrfaptastic 3214cd643d Minor changes
* Fix double buffer example
* Remove the I2S user clock config for simplicity - ESP32 turns out to be massively limited anyway to 20Mhz...
2021-02-15 15:36:20 +00:00

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2.3 KiB
C++

#include <ESP32-HUB75-MatrixPanel-I2S-DMA.h>
/*
* Below is an is the 'legacy' way of initialising the MatrixPanel_I2S_DMA class.
* i.e. MATRIX_WIDTH and MATRIX_HEIGHT are modified by compile-time directives.
* By default the library assumes a single 64x32 pixel panel is connected.
*
* Refer to the example '2_PatternPlasma' on the new / correct way to setup this library
* for different resolutions / panel chain lengths within the sketch 'setup()'.
*
*/
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);
}