ESP8266 touch support for STMPE610 about guislice HOT 7 CLOSED

Tim - changes have been made but not tested on the ESP8266 yet. GUIslice should now support both STMPE610 and FT6206 touch drivers in the TFT_eSPI display mode. Let me know if you find an opportunity to give it a try. Thanks!

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I'm excited to try this. Hopefully I'll have time tonight.

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It's not working for me. I can use:

#define DRV_DISP_TFT_ESPI          // Arduino: Bodmer/TFT_eSPI library
#define DRV_TOUCH_NONE          // No touchscreen support

and observe that the screen is drawn much faster than with the Adafruit library.

If I switch to:

#define DRV_DISP_TFT_ESPI          // Arduino: Bodmer/TFT_eSPI library
#define DRV_TOUCH_ADA_STMPE610  // Arduino: Use Adafruit STMPE610 touch driver

then it resets several times. (I can tell by some WiFi debugging I have going on.) Eventually it seems to work, but now clearing a widget (gslc_DrawFillRect(pGui, pElem->rElem, GSLC_COL_BLACK);) is really slow. Switching pages is also really slow.

I assume the initial resets are because of accessing uninitialized memory. (Could be my bug or yours.)

I assume the very slow drawing might be due to the touch code changing the SPI speed from whatever the display code set it to.

This works fine:

#define DRV_DISP_ADAGFX            // Arduino: Adafruit-GFX library
#define DRV_TOUCH_ADA_STMPE610  // Arduino: Use Adafruit STMPE610 touch driver

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Thanks Tim for giving this a try! I now understand why you were mentioning DRV_DISP_ADAGFX. I don't have a good setup to test GUIslice using TFT_eSPI on the ESP8266 with a STMPE610 -- I might see if I can cobble together a 2.8" TFT shield to test but may not get to it for a little bit.

In the meantime, have you managed to use the TFT_eSPI library's example code successfully with the Adafruit STMPE610 driver? It may be simplest for us to rule out any conflicts there before we add in the GUIslice layer.

@Bodmer: are you aware of any challenges we may face when running TFT_eSPI with the Adafruit STMPE610 touch driver?

Thanks!

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Hi, try switching on transaction support in the TFT_eSPI library setup file by removing //.

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Thanks @Bodmer, that appears to be it! (I had originally assumed that the STMPE610 would be running in I2C mode so didn't consider the potential for SPI conflict. After digging further I see that the STMPE610 was instead running in SPI mode)

I recreated the issue in a Adafruit 2.8" TFT touchscreen with ESP-12E using TFT_eSPI + Adafruit STMPE610. After making the change to uncomment #define SUPPORT_TRANSACTIONS in TFT_eSPI's User_setup.h, I no longer observed the performance impact.

Also, @rtwfroody, there were some memory access issues in the simplified Arduino examples that I have now fixed in 30fb3f8 so you may want to update your code if you were based upon those.

Hope that helps!

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With the changes including the recommendation for SUPPORT_TRANSACTIONS in TFT_eSPI and an adjustment to the main loop touch polling rate (commit 084f5b5), I believe a number of the original issues may have been addressed.

I have been successfully testing ESP-12E / ESP8266 with an ILI9341 display and STMPE610 touch controller. @rtwfroody -- please feel free to open a new issue if you still observe outstanding problems with the latest release.

Thanks!

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