Update 3.0.7 broke double buffer again

[primus192]

Using double buffer on 3.0.7 update occurs with turning off the screen every second time i call it. It works perfectly on 3.0.6

[mrcodetastic]

Got a simple test sketch to demo?

[primus192]

On 3.0.6 it is smooth without flicker. On 3.0.7 this is flashy and screen wipes.

#include <Arduino.h>
#define R1_PIN 0 //25
#define G1_PIN 18 //33
#define B1_PIN 2
#define R2_PIN 14
#define G2_PIN 12
#define B2_PIN 13
#define A_PIN 23
#define B_PIN 19
#define C_PIN 5
#define D_PIN 17
#define E_PIN 32
#define LAT_PIN 4
#define OE_PIN 15
#define CLK_PIN 16
#define BUTTON 39
/*--------------------- MATRIX LILBRARY CONFIG -------------------------*/
#define SERPENT true
#define TOPDOWN false
#define NUM_ROWS 2
#define NUM_COLS 3
#define PANEL_RES_X 64     // Number of pixels wide of each INDIVIDUAL panel module. 
#define PANEL_RES_Y 64     // Number of pixels tall of each INDIVIDUAL panel module.
#define PANEL_CHAIN NUM_ROWS*NUM_COLS      // Total number of panels chained one to another
//#define VIRTUAL_MATRIX_CHAIN_TYPE CHAIN_TOP_RIGHT_DOWN
#define VIRTUAL_MATRIX_CHAIN_TYPE CHAIN_TOP_LEFT_DOWN
  /* Configure the serpetine chaining approach. Options are:
        CHAIN_TOP_LEFT_DOWN
        CHAIN_TOP_RIGHT_DOWN
        CHAIN_BOTTOM_LEFT_UP
        CHAIN_BOTTOM_RIGHT_UP
*/

#include <ESP32-VirtualMatrixPanel-I2S-DMA.h>
void redrawMatrix(bool pattern);
MatrixPanel_I2S_DMA* dma_display = nullptr;
VirtualMatrixPanel* virtualDisp = nullptr;

void setup() {
        HUB75_I2S_CFG::i2s_pins _pins = { R1_PIN, G1_PIN, B1_PIN, R2_PIN, G2_PIN, B2_PIN, A_PIN, B_PIN, C_PIN, D_PIN, E_PIN, LAT_PIN, OE_PIN, CLK_PIN };
        HUB75_I2S_CFG mxconfig(
            PANEL_RES_X,   // width
            PANEL_RES_Y,   // height
            PANEL_CHAIN,   // chain length
            _pins,   // pin mapping
            HUB75_I2S_CFG::FM6124      // driver chip
        );
        mxconfig.i2sspeed = mxconfig.HZ_20M;
        mxconfig.min_refresh_rate = 10;
        mxconfig.double_buff = true;
        mxconfig.setPixelColorDepthBits(3);
        dma_display = new MatrixPanel_I2S_DMA(mxconfig);
        dma_display->begin();
        virtualDisp = new VirtualMatrixPanel((*dma_display), NUM_ROWS, NUM_COLS, PANEL_RES_X, PANEL_RES_Y, VIRTUAL_MATRIX_CHAIN_TYPE);
        redrawMatrix(true);
}

void redrawMatrix(bool pattern) {
    dma_display->setBrightness8(255);
    virtualDisp->clearScreen();
    virtualDisp->setCursor(0,0);
    if(pattern) {
        virtualDisp->print("first buffer");
    } else {
        virtualDisp->print("second buffer");
    }
    delay(100);
    virtualDisp->flipDMABuffer();
}

void loop() {
    redrawMatrix(true);
    delay(1000);
    redrawMatrix(false);
    delay(1000);
}

[mrcodetastic]

Thanks for the test script. Super useful to find a stupid regression.

Let me know if this is ok. Will push a new version and not touch this library anymore for a while.

[primus192]

All gucci

[EclipseBoom]

This works. Thanks.

Now I just need to figure out why my sketch doesn't act like that...