BLE and flash write problem

[air]

Hello,

I'm using nrf51822/s130/sdk12.1.0. Before adding BLE code there's no problem in writing inner flash. In main I just added below ble_app_uart codes(not modified).

1. ble_stack_init();
2. gap_params_init();
3. services_init();
4. advertising_init();
5. conn_params_init();

• S130 writed already.
• I use flash area : 2K Bytes area from 0x30000(page 192).

After that reset occurs when writing inner flash. I don't know why. I have to use BLE. How should I do?

thanks,

[FormerMember]

When the softdevice is enabled, flash operations should be done using the sd_flash_xx api. For writing to flash, sd_flash_write() should be used.

To simplifying storing data to flash, the library flash data storage (FDS) can be used.

[air]

I'll try. Additionally must I erase before write? I know that erase is necessary before write commonly.

[FormerMember]

Yes, the area you write to has to be erased before writing to it.

[air]

I solved this problem thanks to you. In below code is delay time necessary?

sd_flash_page_erase(page);
nrf_delay_ms(ERASE_FLASH_DELAY);   // 5mS

// writeFlashPage(addr, wrData); sd_flash_write(addr, wrData, cnt); nrf_delay_ms(WRITE_FLASH_DELAY); // 5mS

[FormerMember]

The required delay depends on if there are some BLE activity going on. Therefore, rather than using a fixed delay, I would recommend you to wait for the event NRF_EVT_FLASH_OPERATION_SUCCESS, telling that the operation was successfully completed.

In addition, it is also good practice to check the returned error code when calling a function.

[air]

I will. Thank you.