nrf52840 errata [198] - data corruption on SPIM3

[Dor Sadeh]

Hi, I'm using the nrf52840 with Zephyr and I indeed encountered data corruption on SPIM3 transmitted data.

How do I implement the proposed workaround?

"Reserve dedicated RAM AHB slave for the SPIM3 transmit buffer, not overlapping with application data used by the CPU."

[Simonr]

Hi 

Most workarounds for anomalies like this in Zephyr/the nRFConnect SDK are set by enabling a config, and the same goes for the erratum 198. In your project's nrfx_config_nrf52840.h file the following define is by default set to 0: NRFX_SPIM3_NRF52840_ANOMALY_198_WORKAROUND_ENABLED. If you set it to 1, this workaround will be implemented from nrfx_spim.c I believe.

Best regards,

Simon

[Dor Sadeh]

I've set in nrfx_config_nrf52840.h:

#define NRFX_SPIM3_NRF52840_ANOMALY_198_WORKAROUND_ENABLED 1

 

And I still get data corruption.

I'm not writing anything to the transmit buffer used by spim3 while transmitting data as suggested in the workaround.