pstorage_handle_t is lost in BLE NUS data event

Question

why m_storageHandle_DeviceName became to 0xFFFFFFFF, its value was init by pstorage_register when app startup, but here it lost value. Can anybody help me ? 
 // event on receiving data from ble uart service
static void on_nus_data_evt(ble_nus_t * p_nus, uint8_t * p_data, uint16_t length)
{
 uint32_t err_code = 0;
 if (p_data != NULL && length > 0)
 {
 err = pstorage_clear( & m_storageHandle_DeviceName, 
 DEVICE_NAME_LENGTH*4);
	APP_ERROR_CHECK(err);
 }
}

bob · Accepted Answer

code.txt 
 // main.c 
 static ble_nus_t m_nus;
static ble_nus_init_t m_nus_init;
static pstorage_handle_t	m_storageHandle_DeviceName; 
 static void on_nus_data_evt(ble_nus_t * p_nus, uint8_t * p_data, uint16_t length)
{
uint32_t err_code = 0; 
 if (p_data != NULL && length > 0)
{
 pstorage_handle_t blockHandle;
err_code = pstorage_block_identifier_get(&m_storageHandle_DeviceName, 0, &blockHandle);
APP_ERROR_CHECK(err_code);
}
 
 } 
 static void bond_manager_init(void)
{
uint32_t err_code;
ble_bondmngr_init_t bond_init_data;
bool bonds_delete; 
 err_code = pstorage_init();
APP_ERROR_CHECK(err_code);

err_code = app_button_is_pushed(SIGNAL_ALERT_BUTTON, &bonds_delete);
APP_ERROR_CHECK(err_code);

bond_init_data.flash_page_num_bond = FLASH_PAGE_BOND;
bond_init_data.flash_page_num_sys_attr = FLASH_PAGE_SYS_ATTR;
bond_init_data.evt_handler = NULL;
bond_init_data.error_handler = bond_manager_error_handler;
bond_init_data.bonds_delete = bonds_delete;
err_code = ble_bondmngr_init(&bond_init_data);
APP_ERROR_CHECK(err_code);
 
 } 
 static void gap_params_init(void)
{
uint32_t err_code;
ble_gap_conn_params_t gap_conn_params;
ble_gap_conn_sec_mode_t sec_mode; 
 BLE_GAP_CONN_SEC_MODE_SET_OPEN(&sec_mode);

	
pstorage_module_param_t param;
param.block_count = 1;
param.block_size = 8*4;
param.cb = on_pstorage_deviceName_evtHandler;
err_code = pstorage_register(&param, &m_storageHandle_DeviceName);
APP_ERROR_CHECK(err_code);

	
static uint8_t devName[DEVICE_NAME_LENGTH]__attribute__((aligned(4))) = {0};	
GET_DEVICE_NAME(devName);	
err_code = sd_ble_gap_device_name_set(&sec_mode, (uint8_t *)devName, DEVICE_NAME_LENGTH);
APP_ERROR_CHECK(err_code);


err_code = sd_ble_gap_appearance_set(BLE_APPEARANCE_GENERIC_KEYRING);
APP_ERROR_CHECK(err_code);

memset(&gap_conn_params, 0, sizeof(gap_conn_params));

gap_conn_params.min_conn_interval = MIN_CONN_INTERVAL;
gap_conn_params.max_conn_interval = MAX_CONN_INTERVAL;
gap_conn_params.slave_latency = SLAVE_LATENCY;
gap_conn_params.conn_sup_timeout = CONN_SUP_TIMEOUT;


err_code = sd_ble_gap_ppcp_set(&gap_conn_params);
APP_ERROR_CHECK(err_code);


err_code = sd_ble_gap_tx_power_set(TX_POWER_LEVEL);
APP_ERROR_CHECK(err_code);
 
 } 
 static void nus_init(void)
{
uint32_t err_code; 
 memset(&m_nus_init, 0, sizeof(m_nus_init));
m_nus_init.data_handler = on_nus_data_evt;

err_code = ble_nus_init(&m_nus, &m_nus_init);
APP_ERROR_CHECK(err_code);
 
 } 
 int main(void)
{
ble_stack_init(); 
 bond_manager_init();
gap_params_init();
advertising_init(BLE_GAP_ADV_FLAGS_LE_ONLY_LIMITED_DISC_MODE);
	
nus_init();

conn_params_init();
sec_params_init();

advertising_start();
	
for (;;)
{
 uint32_t err_code = sd_app_evt_wait();
APP_ERROR_CHECK(err_code);
}
 
 }

Nikita · Answer

You are trying to load DEVICE_NAME_LENGTH*4 bytes in DEVICE_NAME_LENGTH bytes len array, so you getsome of your ram corrupted.