pstorage guide

Question

HI,everyone! 
 I want to use pstorage to store some data, so I followed the steps given by devzone.nordicsemi.com/.../ , but it didn't work.
Then I checked ecah function and found out the 
 
 pstorage_register (&p_example_param,
&m_p_example_id) 
 
 return NRF_ERROR_NULL,and I can't find out where the problems come from. 
 Can someone point out the problem or give me an example for pstorage use? 
 Thank you very much!

Nikita · Accepted Answer

Are you using device manager along with your test psorage?
You shouldn't initialize pstorage_init twice if you call example_pstorage_init after device manager init.
Or you need to increase maximum number of applications PSTORAGE_MAX_APPLICATIONS in pstorage_platform.h. 
 UPD: 
 You can read more about pstorage here . 
 There is a pstorage example code here 
 Example handler: 
 // Event Notification Handler.
static void example_cb_handler(pstorage_handle_t * handle,
 uint8_t op_code,
 uint32_t result,
 uint8_t * p_data,
 uint32_t data_len)
{
 switch(op_code)
 {
 case PSTORAGE_LOAD_OP_CODE:
 if (result == NRF_SUCCESS)
 {
 // Store operation successful.
 }
 else
 {
 // Store operation failed.
 }
 // Source memory can now be reused or freed.
 break; 
 case PSTORAGE_UPDATE_OP_CODE:
 if (result == NRF_SUCCESS)
 {
 // Update operation successful.
 }
 else
 {
 // Update operation failed.
 }
 break;
 case PSTORAGE_CLEAR_OP_CODE:
 if (result == NRF_SUCCESS)
 {
 // Clear operation successful.
 }
 else
 {
 // Clear operation failed.
 }
 break;
 }
}

pstorage guide

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