Tool/software:
Team,
Our customer is interested in knowing how they can go about connecting their SPI LCD Sitronix ST7735R to the AM62P’s OSPI interface?
[CUSTOMER]
The LCD model they're using is the Sitronix ST7735R
https://www.crystalfontz.com/controllers/datasheet-viewer.php?id=319
It should be a SPI interface LCD panel however, not QSPI or OSPI.
[TI]
While we do have basic general purpose kernel examples for SPI and OSPI, I do not believe we’ve incorporated a specific driver for the ST7735R just yet.
However, I do find that via e2e several other TI customers have connected this same LCD to SPI interfaces on various TI processors:
(3) Search - TI E2E support forums
It should be certainly possible, but we would save time and effort if a SW driver actually already existed for this panel.
Do you happen to know if Sitronix themselves offers any sort of SW drivers for their ST7735R panel?
Sometimes the LCD manfs do offer drivers.
We can also check with our Processors team to see if they have whereabouts of an ST7735R driver.
You are running under Linux correct?
[CUSTOMER]
Yes, we are running in Linux (TI BSP 10.01), Kernel is 6.6.
I've found that the kernel includes this driver.
- drivers/staging/fbtft/fb_st7735r.c
- drivers/gpu/drm/tiny/st7735r.c
- Documentation/devicetree/bindings/display/sitronix,st7735r.yaml
But I'm not sure how to configure this in OSPI. The DTS samples are all connected to the regular SPI.
[TI]
That may simply be the case (connected to regular SPI vs. OSPI/QSPI) and either would need to be used as-is (SPI) or modified to support an OSPI interface which would require some amount of SW work.
We can ask if we are aware if this has been done. I may simply start a new E2E Forum post, unless one has already been started on this topic (are you aware of one being started?).
TY,
CY
