could anybody give an example that pstorage works?

RE: could anybody give an example that pstorage works?

frank zhang — Thu, 14 Aug 2014 05:09:07 GMT

the problem is solved, please close this question.

RE: could anybody give an example that pstorage works?

frank zhang — Thu, 14 Aug 2014 04:11:52 GMT

The code failed to pass "is_word_aligned" check in pstorage_store function, and after I changed the p_src parameter, pstorage_store and pstorage_load worked in the testing code.

RE: could anybody give an example that pstorage works?

frank zhang — Thu, 14 Aug 2014 01:35:44 GMT

ps: I tested it on QF AAC0 and QF AAG0, both failed.

RE: could anybody give an example that pstorage works?

frank zhang — Thu, 14 Aug 2014 01:24:31 GMT

I took all the advices and changed my code, but still failed to get pstorage working. I added the main part of my code below, and what I can tell is the pstorage_clear signal can be received, which means the event handler is set properly; the code just stuck at the line while(ps_flag == 0); after I called pstorage_store, it means there are no interrupts for pstorage_store. Can anybody help to tell how to make pstorage_store working?

/**===============test code========================*/

static uint8_t test_data[4] = {0x01,0x02,0x03,0x04};
static uint8_t ps_flag = 0;

static void sys_evt_dispatch(uint32_t sys_evt)
{
    pstorage_sys_event_handler(sys_evt);
}

static void ble_stack_init(void)
{    
    SOFTDEVICE_HANDLER_INIT(NRF_CLOCK_LFCLKSRC_XTAL_20_PPM, false);
    uint32_t err_code;
    ble_enable_params_t ble_enable_params;
    memset(&ble_enable_params, 0, sizeof(ble_enable_params));
    ble_enable_params.gatts_enable_params.service_changed = IS_SRVC_CHANGED_CHARACT_PRESENT;
    err_code = sd_ble_enable(&ble_enable_params);
    APP_ERROR_CHECK(err_code);
    
    err_code = softdevice_sys_evt_handler_set(sys_evt_dispatch);
    APP_ERROR_CHECK(err_code);
}

static void dm_pstorage_cb_handler(pstorage_handle_t * p_handle,
                                   uint8_t             op_code,
                                   uint32_t            result,
                                   uint8_t           * p_data,
                                   uint32_t            data_len)
{
    switch(op_code)
    {
        case PSTORAGE_ERROR_OP_CODE:
                ps_flag = 1;
            break;
        case PSTORAGE_STORE_OP_CODE: 
                ps_flag = 2;           
            break;
        case PSTORAGE_LOAD_OP_CODE:
                ps_flag = 3;           
            break;
        case PSTORAGE_CLEAR_OP_CODE:
                ps_flag = 4;            
            break;
        case PSTORAGE_UPDATE_OP_CODE:
                ps_flag = 5;
            break;
        default:
                ps_flag = 6;
            break;
    }
}



static void pstorage_test(void)
{
    pstorage_module_param_t flashparam;
    pstorage_handle_t       flashhandle;
    pstorage_handle_t       flash_block_handle;
    
    uint32_t retval;
    
    flashparam.block_size  = 20;
    flashparam.block_count = 1;
    flashparam.cb          = dm_pstorage_cb_handler;
  
    retval = pstorage_init();   
    retval = pstorage_register(&flashparam, &flashhandle);   
    
    retval = pstorage_clear(&flashhandle, 20);  
    
    while(ps_flag == 0);
    ps_flag = 0;
   
    retval = pstorage_block_identifier_get(&flashhandle, 0, &flash_block_handle);      
    retval = pstorage_store(&flash_block_handle, test_data, 4, 0);
       
    while(ps_flag == 0);
    ps_flag = 0;    
   
    retval = pstorage_block_identifier_get(&flashhandle, 0, &flash_block_handle);
     
    uint8_t load_data[4];
    retval = pstorage_load(load_data, &flash_block_handle, 4, 0);
    
    while(ps_flag == 0);
    ps_flag = 0;
    
    if (retval == NRF_SUCCESS)
    {   
        if ((load_data[0] == 0x01)&(load_data[1] == 0x02)&(load_data[2] == 0x03)&(load_data[3] == 0x04))
        {
            ps_flag = 100;
        }
    }   
}

/**=============test code===================================*/

RE: could anybody give an example that pstorage works?

Nikita — Wed, 13 Aug 2014 12:53:15 GMT

Pstorage operations will execute in interrupts.

pstorage_sys_event_handler will be called from sys_evt_dispatch registered with softdevice handler module for SYS events softdevice_sys_evt_handler_set(sys_evt_dispatch).

RE: could anybody give an example that pstorage works?

John — Wed, 13 Aug 2014 12:06:21 GMT

The nrf_delay_us is a tight loop of NOP instructions. You can make it as long as you want, but it is not giving time to allow other processing to occur. You need to wait for the soft device to return an event indicating your pstorage_store command has completed.

RE: could anybody give an example that pstorage works?

Nikita — Wed, 13 Aug 2014 11:12:07 GMT

flashparam.block_size  = 20;
flashparam.block_count = 1;
...
retval = pstorage_clear(&flashhandle,512*100);

Read this:

The size requested to be erased has to be within or equal the size of a block. If a size less than block size is given, the API will clear the requested number of bytes beginning at the first memory location in the block. It is not possible to request a size which spans to the next block in the module.

RE: could anybody give an example that pstorage works?

frank zhang — Wed, 13 Aug 2014 09:53:26 GMT

Hi Alseth, I set the break point at line "if ((load_data[0] == 0x01)&(load_data[1] == 0x02)&(load_data[2] == 0x03)&(load_data[3] == 0x04))" and I am sure test_data was available when pstorage_store get called, and the software should have time to save the data to flash as I called nrf_delay_us(1000000) to give it 1 second time. Could you help to try the code I posted and point out where the problem is?

RE: could anybody give an example that pstorage works?

Håkon Alseth — Wed, 13 Aug 2014 09:28:42 GMT

Have you taken a look at this question? devzone.nordicsemi.com/.../

It shows how to use the pstorage for application storage.