#define NUM_PAGES 					1
uint8_t fs_callback_flag;
uint32_t flash_store(uint32_t *dat,uint16_t len);

void fs_evt_handler(fs_evt_t const * const evt, fs_ret_t result)
{
			switch(evt->id)
			{
				case FS_EVT_STORE:
						fs_callback_flag = 0;
						printf("Store\r\n");
						break;
				case FS_EVT_ERASE:
						fs_callback_flag = 0;
						printf("Erase\r\n");
			
					  break;
			}
}
FS_REGISTER_CFG(fs_config_t fs_config) =
{
		.callback  = fs_evt_handler, 			// Function for event callbacks.
		.num_pages = NUM_PAGES,     			// Number of physical flash pages required.
		.priority  = 0xFE            			// Priority for flash usage.
};
uint32_t flash_clear(void)
{
		uint32_t  err_code; 
		fs_callback_flag = 1;

		err_code = fs_erase(&fs_config, fs_config.p_start_addr, NUM_PAGES, NULL);
		APP_ERROR_CHECK(err_code );
	  while(fs_callback_flag == 1)  { power_manage(); }
	 
		return err_code;		
}

		
static void fstorage_init(void)
{
		
		fs_ret_t ret = fs_init();
		read_clear_data();
}