sd_flash_page_erase() completion.

[Lennart]

Hello, I working for TSS.se now selling 100.000 temperature-loggers annually. We aim to develop a new IoT based logger based on nRF52832 as a replacement.

Issue-background:
Since I now evaluate our final flash implementation together with BLE and SoftDevice enabled, I have moved to SoftDevice supported functions, but it show up that sd_flash_page_erase() does not replace nrf_nvmc_page_erase() as sd_flash_page_erase() does not complete the task. I find no function that complete the task, nor any xx_busy() or xx_wait() function. I have also got to know that we cannot easy apply BLE without SoftDevice enabled nor complete the SoftDevice code our self. I see the same is true for sd_flash_write().

Questions:
1. Is the events NRF_EVT_FLASH_OPERATION_SUCCESS and NRF_EVT_FLASH_OPERATION_ERROR, the only reasonable way to solve the issue ?

2. I have no idea how to implement those events, is it more or less just to add, or does those events require any library such as fstorage_sd or sdk_config.h modification (we avoid merge/modify those due to typical misc issues) ?

3. Where to find how to do those events ?

Note: We have no other need of fstorage_sd as our platform-independent application handle all erase-logic.

Best regards Lennart Vedin for TSS.se

[Kenneth]

Hi,

The sd_flash_page_erase()/sd_flash_write() will not execute momentarily, but will be scheduled to occur in the softdevice depending on other on-going tasks (e.g. BLE connection, advertisement etc). When the task have been completed with success or failure, then the softdevice will throw a system event with either NRF_EVT_FLASH_OPERATION_SUCCESS or NRF_EVT_FLASH_OPERATION_ERROR event. You may write this handling from scratch, but the preferred is to take a look at the \nRF5_SDK_15.3.0_59ac345\examples\peripheral\flash_fstorage example code.

Best regards,
Kenneth

[Lennart]

Ok it seams work now

Thank you !