pstorage_register returning NRF_ERROR_INVALID_PARAM

Question

I'm trying to write a flash buffer but am hitting a vexing error. To initialise the flash buffer (or rather a test initialisation which will hopefully become the flash buffer) I run the following code: 
 typedef struct {
	timestamp_t timestamp; // A 32 bit integer 
	uint16_t type;
	uint32_t value;
} reading_t;

// Initialises the flash buffer.
uint32_t flash_buffer_init(void) {
	uint32_t err_code, i;
	uint8_t zeros[16] __attribute__((aligned(16)));
	pstorage_module_param_t param;
	pstorage_handle_t dest_block;
	
	// Make the zeros array zeros
	memset(zeros, 0, sizeof(zeros));
	
	param.block_size = 16;
	param.block_count = 1;
	param.cb = flash_buffer_pstorage_cb_handler;
	
	// Register with the flash module
	if ((err_code = pstorage_register(&param,
 &flash_buffer.buffer_handle)) != NRF_SUCCESS)
	{
 return err_code;
	}
	
	// Get the block identifier
	if ((err_code = pstorage_block_identifier_get(
 &flash_buffer.buffer_handle, 0, &dest_block)) !=
 NRF_SUCCESS)
	{
 return err_code;
	}
	
	// Write zeros to the block
	if ((err_code = pstorage_store(&dest_block, zeros,
 16, 0)) != NRF_SUCCESS)
	{
 return err_code;
	}
	
	return NRF_SUCCESS;
}
 
 Later on, when I call bond_manager_init() when setting up Bluetooth I get an NRF_ERROR_INVALID_PARAM error back. It comes from the call to pstorage_register() that takes place within ble_bondmngr_init() . Is there some change I need to make to the stock Bluetooth code to get it to play nice with my buffer?

Nikita · Accepted Answer

Change this: 
 __attribute__((aligned(16)))
 
 
 
 to this: 
 __attribute__((aligned(4)))
 
 Because you need word-aligned buffer in ram. 
 
 It seems you are calling pstorage_init two times. You need to call flash_buffer_init() after bond_manager_init() and don't call pstorage_init() yourself.

pstorage_register returning NRF_ERROR_INVALID_PARAM

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