TFT_eSPI::readRect() doesn't seem to work on T-Watch 2020 V1

[CoenBlijker]

Hi,

I have created a small (test) program to see whether I could get readRect() to work (see below) The problem is that readRect() only returns '0' bytes. The pushImage() function works fine btw.

Am I doing something wrong? Or is this a issue in the library?

Any help would be greatly appreciated.

Coen

TTGOClass *watch;

uint16_t *screenContent = NULL;

void setup()
{
    // Serial port for debugging purposes
    Serial.begin(115200);
    while (!Serial)
        ;           // wait for serial attach
    Serial.flush(); // Cleanup..

    log_d("Total heap: %d", ESP.getHeapSize());
    log_d("Free heap: %d", ESP.getFreeHeap());
    log_d("Total PSRAM: %d", ESP.getPsramSize());
    log_d("Free PSRAM: %d", ESP.getFreePsram());

// Alloc memory to store screen content
    screenContent = (uint16_t *)ps_calloc(220 * 30, sizeof(uint16_t));

    // Get Watch object and set up the display
    watch = TTGOClass::getWatch();
    watch->begin();
    watch->openBL();

    watch->tft->setSwapBytes(true);
    watch->tft->pushImage(0, 0, 240, 240, Image_240x240);

   // Get initial image (part)
    watch->tft->readRect(10, 110, 220, 30, screenContent);

    watch->tft->setTextFont(2);
    watch->tft->setTextSize(2);
    watch->tft->setTextColor(TFT_DARKGREEN);
    watch->tft->setCursor(0, 0);
    watch->tft->println("Hello T-Watch");
    watch->tft->drawCentreString("-Middle-", 120, 110, 1);
}

void loop()
{
    int16_t x, y;
    char buf[128];

    if (watch->getTouch(x, y))
    {
        watch->tft->pushRect(10, 110, 220, 30, screenContent);

        sprintf(buf, "x:%03d  y:%03d", x, y);

        watch->tft->drawCentreString(buf, 120, 110, 1);
    }
    delay(5);
}