Updating FDS file during BLE communication may corrupt the file.

RE: Updating FDS file during BLE communication may corrupt the file.

Kirinyaga — Mon, 10 Jul 2023 06:41:03 GMT

[quote userid="15146" url="~/f/nordic-q-a/99602/updating-fds-file-during-ble-communication-may-corrupt-the-file/431461"]Could you check if you have power-fail comparator(POF) enabled in your application?[/quote]

In my application I just enabled POF when writing FDS.

[quote userid="15146" url="~/f/nordic-q-a/99602/updating-fds-file-during-ble-communication-may-corrupt-the-file/431461"]If power-fail warning is enabled and the supply voltage is below V_POF the power-fail comparator will prevent the NVMC from performing write operations to the NVM.[/quote]

Thank you for the information about the POF specification.

I will try disabling POF in my application.

RE: Updating FDS file during BLE communication may corrupt the file.

Sigurd — Fri, 16 Jun 2023 11:02:30 GMT

Hi,

Could you check if you have power-fail comparator(POF) enabled in your application? If power-fail warning is enabled and the supply voltage is below V_POF the power-fail comparator will prevent the NVMC from performing write operations to the NVM.

https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/power.html?cp=5_2_0_17_3_0#unique_1204650543

RE: Updating FDS file during BLE communication may corrupt the file.

Kirinyaga — Mon, 12 Jun 2023 11:25:56 GMT

[quote userid="15146" url="~/f/nordic-q-a/99602/updating-fds-file-during-ble-communication-may-corrupt-the-file/429047"]But FDS recognizes invalid data and never returns corrupted data to the user.[/quote]

I understand your explanation.

However, unlike the description, corrupted data is returned to the user application.

[quote userid="15146" url="~/f/nordic-q-a/99602/updating-fds-file-during-ble-communication-may-corrupt-the-file/429047"]In case of power-loss, data could be written incompletely.[/quote]

For example, if the voltage drops momentarily (or some other reason), could the FDS mistakenly think the data was written correctly even though the data was written incompletely?

RE: Updating FDS file during BLE communication may corrupt the file.

Sigurd — Fri, 02 Jun 2023 14:49:38 GMT

Hi,

[quote user="Kirinyaga"]I'm using nRF5_SDK_17.1.0_ddde560.[/quote]

Good.

[quote user=""]What controls can cause this phenomenon?[/quote]

In case of power-loss, data could be written incompletely. But FDS recognizes invalid data and never returns corrupted data to the user.

RE: Updating FDS file during BLE communication may corrupt the file.

Kirinyaga — Wed, 17 May 2023 09:56:36 GMT

Thank you for answering.

I'm using nRF5_SDK_17.1.0_ddde560.

RE: Updating FDS file during BLE communication may corrupt the file.

Sigurd — Wed, 10 May 2023 12:19:53 GMT

Hi,

What SDK version are you using ?