TFT 1.8" LCD Flickers like crazy when used with SD

Using Arduino LEDs and Multiplexing
1

It seems that SD read function interferes with the screen since MOSI and SCK are shared. I've uploaded the video here. video

I bought the module from here: link

Is there a solution to this other than using seperated sd module?

Same problem here: 1.8" TFT ST7735 Flickers drawing bitmaps - Displays - Arduino Forum

2

Ok, this topic is quite old, but maybe someone did find a solution.

I'm having the same problem with a 1,8" TFT with SST7735S chip:
The display flickers when reading the SD card. Writing does not flicker.

I tried:

  • Capacitors in different places.
  • Delays before / after TFT/SD access.
  • SPI.endTransaction and manually writing HIGH to the TFT-Slaveselect pin after usage.

Nothing helped.

My workaround for now is to implement a read cache for my database (~1kB). I read all data into RAM at application startup.

Can anyone with a similar configuration confirm this problem?