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marekburiak / ILI9341_due

Arduino Due and AVR (Uno, Mega, Nano, Pro Mini,...) library for interfacing with ILI9341 SPI TFTs
http://marekburiak.github.io/ILI9341_due
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Printing slowdown #8

Closed imgeorgiev closed 8 years ago

imgeorgiev commented 8 years ago

First, I would like to thank you for this amazing library but it seems that I have encountered a problem.

All of a sudden the printing speed slowed down substantially without modifying any code. gTextArea tempTextArea{ 9, 209, 69, 229 }; tft.setTextArea(9, 209, 69, 229); tft.clearTextArea(); tft.setTextColor(ILI9341_SNOW); tft.print("2224"); Serial.println("printed!");

This is a sample code that can't even print fast enough before the next cycle begins. Funny things is that it was working perfectly before.

marekburiak commented 8 years ago

I haven't changed anything in my lib in a quite a few months so not sure what timeframe you mean by "before". Have you not changed some settings in ILI9341_due_config.h or maybe added another lib that might change SPI settings or changed your code in loop() or added interrupts? Could be many things.

imgeorgiev commented 8 years ago

I don't believe I have done anything.

Can you give me a sample code of a rapidly changing text?

marekburiak commented 8 years ago

sorry, I don't have a sample but your example is pretty near. You don't need to clearArea in each loop. Just print over the existing text. So do this in setup() tft.setTextArea(9, 209, 69, 229); tft.clearTextArea(); tft.setTextColor(ILI9341_SNOW); and this in loop: tft.print("text"); Threre are other functions that allow you to clear the previous text if it was longer than the new text (look at gTextEraseFromBOL, gTextEraseToEOL and gTextEraseFullLine).

imgeorgiev commented 8 years ago

I figured it out! Thank you.

it seems that your library deletes the previously written string unlike the original Adafruit library.

The thing that you have created is a marvel !