kromych

Mine is Waveshare 320x240. It would not work at first, too, with similar symptoms. For me, that turned out to be timing and signal integrity. The fix was: 1. decrease...

I used the pinout as in the example, now have switched to this one: | The display | The Pico | |------------|----------| | BL | GP20 | | RST |...

Understood, thanks! The omission of the CS pin on the board makes me think the manufacturer might have pulled it up/down or mux'ed with another signal? The code in the...

Couldn't find a datasheet for the part. Planning also at rummaging through other example code out there (verilog/c++/rust) to see if anyone has come across such specimen.

Thanks! That's a datasheet for the display driver; would be great to have one for the SPI interface used in the board you got. From the absence of CS, the...

Workflow-wise, a more precise title of this issue (currently "ST7789 example does not function") could be "ST7789 example does not support boards with no CS pin", and folks could debate...

I have gotten some time and CPOL=1 worked for me with either value of CPHA, with CS or without CS. There is a more generic sample for SPI in the...

The TFT_eSPI library might be a better starting point for advanced graphics. It has provisions for RP2040+SPI+PIO, and lots of drivers: https://github.com/Bodmer/TFT_eSPI/blob/master/Processors/pio_SPI.pio.h. Speaking of drivers, the Linux kernel tree has...

Thanks for your help!!! Your approach makes sense to me: I saw the CPOL=1 would make it work as reported above, and the the CPHA would not matter.

Affects my PR #129019 so I thought I'd take a gander at the PML shared here. There were two `CANNOT_DELETE` errors  One of them happened before any `miri.exe` started,...