libuarte and Errata109

RE: libuarte and Errata109

loquat — Thu, 08 Apr 2021 13:50:02 GMT

OK. Thanks.

RE: libuarte and Errata109

Amanda Hsieh — Thu, 08 Apr 2021 08:42:43 GMT

In fact, there is no protection on the TX side. PPI is used to start TX if long packets are sent (over 255 bytes), so it needs to implement a workaround.

-Amanda H.

RE: libuarte and Errata109

loquat — Tue, 30 Mar 2021 22:51:36 GMT

I know that.
However, nrfx_uarte doesn't seem to have any countermeasures.
Also, libuarte doesn't seem to have any countermeasures.
Since libuarte uses UARTE and PPI, I would like to know if the user needs to implement a workaround.

RE: libuarte and Errata109

Amanda Hsieh — Tue, 30 Mar 2021 07:19:54 GMT

Hi Syuji,

Errata [109] affects the peripherals PWM, SPIS, SPIM, TWIS, UARTE, and TWIM. If you don't use those peripherals, you don't need the workaround.

With those peripherals, you could set NRF52_ANOMALY_109_WORKAROUND_ENABLED in sdk_config.h to Enables nRF52 anomaly 109 workarounds for them.

Please note that due to the Easter holiday, we're low on staff, so somewhat lower response times must be expected until April 6th. Sorry about the inconvenience.

-Amanda H.