ST7735S-nRF Connect SDK: nRF82540 interfaces with the ST7735S LCD by using nRF Connect SDK

[Kalyan Agepati]

Hi nRF support team,

I am evaluating ST7735 LCD with the nRF82540 development kit. For your information, I am able to set-up the nRF Connect SDK environment on nRF82540 development kit and able to test sample programs.

When I am trying to integrate the ST7735 LCD module, I did not found any configuration or source code of st7735 in nRF Connect SDK.

Can you please provide the ST7735S interfacing instructions with nRF Connect SDK on nRF82540 development kit?

For your information, I have checked nRF5 SDK interfaces with st7735, but we want st7735 interfacing instructions with nRF Connect SDK only as already we have integrated some modules with this SDK.

Regards,

Kalyan

[helsing]

Hi Kalyan,

I am looking into this and will get back to you tomorrow.

Best regards,

Håkon

[Kalyan Agepati]

Hi Hakon,

Thanks for the response.

Can you please let me know your instructions.

Regards,

Kalyan

[helsing]

HI Kaylan,

Thank you for your patience, I have not found any instructions yet. I have asked internally for support, however, I do not want to promise too much. Do you have a sales contact at Nordic?

The closest thing I have found so far supported by Zephyr is this one, based on the ILI9341 controller:  https://docs.zephyrproject.org/latest/boards/shields/adafruit_2_8_tft_touch_v2/doc/index.html?highlight=ili9341

Best Regards,

Håkon

[Kalyan Agepati]

Hi Hakon,

Thanks for the suggestion.

Regards,

Kalyan

[helsing]

Hi Kaylan,

I have not yet found any support for the ST7735 module. Does your project require this specific display? Or will for example the mentioned module from Zephyr be sufficient?

Best Regards,

Håkon

[Kalyan Agepati]

Hi Hakon,

Thanks for the update and sorry for the delay response.

For our project, we required an ST7735 module. We have found another similar example ST7789V from Zephyr. 

Regards,

Kalyan

[nithilan-dev]

Hi Håkon and Kalyan,

I am currently working on a similar project using the nRF7002 DK (nRF5340 host) with the ST7735S display module.

As a beginner with the nRF Connect SDK (NCS), I am struggling to find a working sample or relevant source code specifically for the ST7735 series. While I noticed that Zephyr now includes a sitronix,st7735r compatible driver, I am unsure how to properly configure the Devicetree overlay and prj.conf for the nRF7002 DK's specific pinout.

Since the nRF7002 DK runs at 1.8V, I am also concerned about the hardware interface logic levels for this LCD.

Could you provide a basic "Hello World" style sample or a snippet of a .overlay file that maps this display to the DK’s Arduino headers? Any guidance on which specific Kconfig symbols are required to initialize the Sitronix driver in the latest NCS version would be greatly appreciated.

Best regards,

Nithilan Saravanan