esp32 + SSD1306

[malachib]

Hey everyone, I am a newcomer to uGFX.  But not a newcomer to programming

I believe I nearly have uGFX running on an ESP32 with an I2C SSD1306.  A proper "uGFX" branding appears on display init.  But then, after that, screen goes black and remains black no matter what I've tried.  Running at 100Khz, just to ensure things work.  I2C APIs not reporting any errors.  Any ideas?  Thanks in advance!

EDIT: Running the "basic" gdisp code, modified slightly:

const char tag[] = "displayTask2";

// Yanking this in direct from "basic" demo for gdisp
void displayTask2(void *pvParameters)
{
	coord_t		width, height;
	coord_t		i, j;

    ESP_LOGD(tag, "Display init start");

    // Initialize and clear the display
    gfxInit();

    ESP_LOGD(tag, "Display init done");

    // Get the screen size
    width = gdispGetWidth();
    height = gdispGetHeight();

    // Code Here
	gdispDrawBox(10, 10, width/2, height/2, White);
    gdispFillArea(width/2, height/2, width/2-10, height/2-10, White);
    gdispDrawLine(5, 30, width-50, height-40, White);

    while(TRUE) {
        for(i = 5, j = 0; i < width && j < height; i += 7, j += i/20)
            gdispDrawPixel(i, j, White);

    	gfxSleepMilliseconds(5000);
        gdispClear(Black);

        ESP_LOGI(tag, "Display redraw");
    }       
}

 

Edited July 3, 2017 by malachib

[malachib]

Solved by this 

 

Beware, things are still as the forum says, the readme.md of gdisp basic sample is outdated.  Refer to the linked thread instead

Edited July 3, 2017 by malachib

[Joel Bodenmann]

Hello @malachib and welcome to the µGFX community!

I'm glad to hear that you managed to solve your issue and that everything is running now. Thanks for bringing the issue with the readme to our attention (again).