Driving ADC1292 with SPIM

[virendraVT]

Hi Team

I was exploring communication with ads1292 over SPI at 1 MHZ.
I tried nrf_drv_spi (SPI0_ENABLED in sdk_config.h) api and I was able to communicate with ads1292, however when I enable `SPI0_USE_EASY_DMA` in sdk_config.h, the ads1292 does not respond, i.e. I do not see anything on MISO.

I observe the same issue while using  nrfx_spim drivers (NRFX_SPIM_ENABLED).

Although at times when I do get response from ads1292 (which I can see on Logic Analyser and is correct) a bus fault handler is invoked with CFSR->PRECISERR set as 1 and BFAR->Address as 0x07070708.

I have tried searching other tickets and taking help from Nordic Semiconductor AI but to no avail.

I would appreciate any help in this regard

[Kenneth]

Hello,

From the description of the case it may seem as you have started developing with the nRF5 SDK. For new development we recommend using the nRF Connect SDK, to get started check out:
https://academy.nordicsemi.com/ 

Also, for new development you may consider using the nRF54LM20A instead of the nRF52840:
https://www.nordicsemi.com/Products/nRF54LM20A 

If you are interested in bare-metal development for the nRF54L-series do check out:
https://www.nordicsemi.com/Products/Development-software/nRF-Connect-SDK/Bare-Metal-option-for-nRF54L-Series?lang=en#infotabs 

Kenneth

[virendraVT]

Hi Kenneth

Thank you for your response.
I already have a working application which uses nRF Connect SDK and Zephyr RTOS but as we were not getting the required support from Nordic / Zephyr in getting FDA certification and treating Zephyr and NCS as SOUP we decided to have another approach and run with another pre-certified SDK and RTOS.

How can I debug this in my case.

[Kenneth]

Please use nRF Connect SDK, we don't really provide support on new development on the nRF5 SDK.

Kenneth