Display stops updating occasionally

[Battou2501]

Hi. I have an issue with display stopping responding to draw commands. The sketch is running and responding to button inputs, buzzer activation, led backlight control etc. But image will not redraw. I have an esp32 controlled pcb that controlls 220v load and a st7796u ips display. I have set spi frequency to 20mhz already. Sometimes it happens when I connect new 220v load. This I think is because of emi from spark in the controlled outlet. But sometimes it happens after few days of running the devise. Display is connected with a 1.5 meter 10 pin ribbon cable and idc connectors. Could it be some stray emi that breaks sync? Or is it spi code freezing? Is there a way to reinit spi communication without total redraw and without loosing current image on display?

[Battou2501]

For now I am testing getting SPI instance from tft usion getSPIinstance method and then calling tft_spi.end() and tft_spi.begin(...TFT_pins...) before any screen update to ensure correct communication during drawing. Tested with outlet plug in spark, screen continued to update every second correctly. Is there a beter way of ensuring spi sync before drawing?

[Battou2501]

Nope.( This method does nothing after all. Still getting stuck image on the screen. (