I haven't tried TFT_ESPI yet. We need to figure out how to configure it. I flashed stm32 using GitHub - prenticedavid/Adafruit_ST7796S_kbv: Adafruit-style library for ST7796S SPI displays. 100,000 microseconds to fill text and 700,000 microseconds to wipe the screen. Or if you overwrite the same set of characters, then 100,000 microseconds. That is, it will take 200,000 microseconds to erase and write the text. These blinks are quite noticeable.