flash_manager works properly only after a reset

[rogi1806]

Hello, I have a issue about flash_manager module.

When I load a program on processor (that has been previously erased) there is a problem with initialization (flash_manager_add return NRF_ERROR_NO_MEM ) and then with writing data. But when I restart progam everithing works fine (even writing and reading data)

I use: 

• nRF52840
• SDK version: 17.0.0
• SDK for Mesh version: 4.2.0
  
  

I just want the flash_manager to work properly from the beginning.

Thanks in advance for any help or tip!

[Amanda Hsieh]

Hi, 

Do you use a custom board or nRF52840DK? How do you erase the board and restart progam? 

Could you step into flash_manager_add to see which function or code returns NRF_ERROR_NO_MEM?

Regards,

Amanda 

[rogi1806]

Yes, I use custom board. I erase / restart program using Segger Embedded Studio debugger. The code look like this:

void flashStorage_init(){ 
    flash_manager_t flashManager;
    
    flash_manager_page_t * p_area;
    p_area = (flash_manager_page_t *)(((const uint8_t *) flash_manager_recovery_page_get()) 
                                           - (15 * PAGE_SIZE));

    const flash_manager_config_t config =
    {
        .write_complete_cb =      writeCb,
        .invalidate_complete_cb = invalidateCb,
        .remove_complete_cb =     removeCb,
        .min_available_space =    WORD_SIZE,
        .p_area =                 p_area,
        .page_count =             1
    };

    uint32_t ret = flash_manager_add(&flashManager, &config);
    __LOG(LOG_SRC_APP, LOG_LEVEL_INFO, "Return code from flash manager %d \n", ret);  
}

The problem appear in flash_manager_add -> flash_area_build -> reserve_action_buffer and that return NULL pointer which leads to an error NRF_ERROR_NO_MEM. After a restart program this method works as it should - there is no problem with initialization and then with writing or reading process.

[Amanda Hsieh]

Hi, 

Sorry for the delay. The support staff is reduced during the summer holidays, and you may experience delayed answers.

Can you try the nRF-Command-Line-Tools to run nrfjprog -e before you load the image? Please let me know it can help or not.

-Amanda H.