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TFT Gizmo backlight dims as image data written
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TFT Gizmo backlight dims as image data written

by nikirobot on Sat Mar 20, 2021 7:02 am

Dear all,

when compiling and running graphictest_tft_gizmo for the CPB, the backlight gradually dims as image data is written and only returns to full brightness when this is finished, resulting in heavy flickering. The CPB and TFT Gizmo are ok, as this does not happen with the precompiled example (UF2-file) from the Adafruit website. So it seems as if somethings goes during compilation, probably with relation to SPI as this happens only while data is written and as Option 2 of the example freezes immediately.
I did a clean reinstall of the Arduino-IDE (v1.8.13), Adafruit nRF52 BSP (correct board: Adafruit Circuit Playground Bluefruit selected), and libraries (Adafruit_GFX v1.10.6, Adafruit BusIO v1.7.2, Adafruit Zero DMA v1.0.8, Adafruit ST7735 and ST7789 v1.6.1, and Adafruit SPIFlash v3.4.1).
Is there anything that you can make out of that?

Regards,
nikirobot

nikirobot
 
Posts: 1
Joined: Sat Mar 20, 2021 6:42 am

Please be positive and constructive with your questions and comments.