CC3220SF: SL_DEVICE_GENERAL_DATE_TIME persistency

mans.andersson

Part Number: CC3220SF

Hi,

Per previous thread (https://e2e.ti.com/support/wireless-connectivity/wi-fi-group/wifi/f/wi-fi-forum/1117149/cc3220sf-sl_device_general_date_time-persistent-mode/4141876?tisearch=e2e-sitesearch&keymatch=sl_deviceSet#4141876) we understand that writing date/time using sl_DeviceSet and SL_DEVICE_GENERAL_DATE_TIME is always a persistent write.

However, there's a note in the SWRU455 and SDK source code contradicting this statement so I'd like help with clarification

The original set value is kept as System Persistence. The updated date and time, however, is kept during hibernate only

I read this as the first ever write to SL_DEVICE_GENERAL_DATE_TIME will be a persistent write. Subsequent writes will only update date/time in NWP without touching flash at all. Can you confirm or help clarify this comment?

Thanks
Måns

over 2 years ago

0 Roman Jordan over 2 years ago

Expert 1945 points

Hello Måns,

just for info: my verifications of that topic show that the modification of that value using sl_DeviceSet is lost after power Off/ On.

Best regards,
Roman

0 mans.andersson over 2 years ago in reply to Roman Jordan

Intellectual 530 points

Understood, we have seen the same. However, the documentation says something is persistent when writing that and we'd like to make sure that we don't wear down the flash too early.

+1 Sabeeh Khan1 over 2 years ago in reply to mans.andersson

TI__Mastermind 26960 points

Hello,

Your understanding is correct. Subsequent writes are not sent to the flash.

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CC3220SF: SL_DEVICE_GENERAL_DATE_TIME persistency