Write to FLASH after BLE init

RE: Write to FLASH after BLE init

Hung Bui — Thu, 16 Nov 2017 12:12:13 GMT

Could you tell what exactly you did for testing with your my_fs ? Seems like you are using fs_event_handler() from the fds ? You should define your own handler. Have you tried to follow the example code in the link to fstorage documentation above ?

RE: Write to FLASH after BLE init

Hung Alan — Thu, 16 Nov 2017 03:41:37 GMT

I register an application with fstorage.

NRF_FSTORAGE_DEF(nrf_fstorage_t my_fs) = { .evt_handler = fs_event_handler, .start_addr = 0x00040000, .end_addr = 0x00041000, };

But an error occurred when connected: case PM_EVT_PEER_DATA_UPDATE_FAILED: { // Assert. APP_ERROR_CHECK(p_evt->params.peer_data_update_failed.error); } break;

error_code = NRF_ERROR_NULL ...

RE: Write to FLASH after BLE init

Hung Bui — Wed, 18 Oct 2017 10:29:07 GMT

NRF_EVT_FLASH_OPERATION_SUCCESS 's one of the system events. You need to register a callback function as an observer for system events by using NRF_SDH_SOC_OBSERVER

But in ble_app_hids_keyboard example, we already use fstorage, I would suggest to register an application with fstorage and use the fstorage API to do flash operation. Read more about fstorage here, example included.

RE: Write to FLASH after BLE init

Hung Alan — Wed, 18 Oct 2017 01:40:32 GMT

Where to wait for the flash callback event? I am working in sdk14 ble_app_hids_keyboard

RE: Write to FLASH after BLE init

Hung Bui — Tue, 17 Oct 2017 09:12:00 GMT

Hi,

Putting the function call inside a loop won't guarantee that the flash operation is finished after the loop.

As in the documentation of sd_flash_page_erase and sd_flash_write, you need to wait for the flash callback event :

NRF_EVT_FLASH_OPERATION_SUCCESS - The command was successfully completed.
NRF_EVT_FLASH_OPERATION_ERROR - The command could not be started.

Before you proceed to the next command. If you want to reset after you write, you need to wait for the NRF_EVT_FLASH_OPERATION_SUCCESS callback event of the write command.