Nordic 51822, SDK5.0.0 and SD6.0.0, pstorage not work?

[mira67]

Hi, I am using pstorage to store and read back data in Nordic 51822 platform, with SDK5.0.0 and SD6.0.0, here is the code how I use the 'pstorage application':

				// Initialize pStorage & Clear if first boot
				retval = pstorage_init();
				if (retval == NRF_SUCCESS){
					//Module initialization successful
				}
				else {
					//Initialization failed, take corrective action
				}
				
				// pStorage registration
				retval = pstorage_register(&flashparam, &flashhandle);
				if (retval == NRF_SUCCESS){
					//Module initialization successful
				}
				else {
					//Initialization failed, take corrective action
				}
		
				retval = pstorage_clear(&flashhandle, 512*100);
				if (retval == NRF_SUCCESS){
					//Module initialization successful
				}
				else {
					//Initialization failed, take corrective action
				}
				
				// Get block handle
				retval = pstorage_block_identifier_get(&flashhandle, 0, &flash_block_handle);
				if (retval == NRF_SUCCESS){
					//Module initialization successful
				}
				else {
					//Initialization failed, take corrective action
				}
				
				// Use pstorage to store data
				uint8_t test_data[4] = {0x01,0x02,0x03,0x04};
				retval = pstorage_store(&flash_block_handle, test_data, 4, 0);
				if (retval == NRF_SUCCESS){
					//Module initialization successful
				}
				else {
					//Initialization failed, take corrective action
				}
				
				// Use pstorage to load data, for test check
				// Get block handle
				retval = pstorage_block_identifier_get(&flashhandle, 0, &flash_block_handle);
				if (retval == NRF_SUCCESS){
					//Module initialization successful
				}
				else {
					//Initialization failed, take corrective action
				}
				
				uint8_t load_data[4];
				retval = pstorage_load(load_data, &flash_block_handle, 4, 0);
				if (retval == NRF_SUCCESS){
					//Module initialization successful
					if ((load_data[0] == 0x01)&(load_data[1] == 0x02)&(load_data[2] == 0x03)&(load_data[3] == 0x04))
					{
						//BlinkLED(2,500,500);
					}
				}
				else {
					//Initialization failed, take corrective action
				}

The problem is: all the returned value from pstorage function gives me 'retval == NRF_SUCCESS', but the load_data read from flash is always {0xFF, 0xFF, 0xFF, 0xFF}, not the right values I wrote in.

Also another observation is, when use the function 'flash_page_erase' to erase all the flash content, it takes couple seconds to finish, but when use the pstorage_clear, it finishes very fast and gives me the successful feedback through handler, so I wonder if the pstorage API actually works or not? Or the way I use it is wrong?

If I want to store and readback data in 51822 with BLE working, what's the best way to do this? use pstorage or directly use the ble_flash.c API?

Thanks.

[Ole Christian Tvedt]

A related problem is debugger flash caching:

If your pstorage_sys_event_handler receives an NRF_SUCCESS on the write operation, but the debugger claims that the flash area still unwritten, make sure the debugger isn't caching the old values.

I'm using Segger J-Link over SWD, and the solution was to uncheck ☐ Allow caching of flash contents in the J-Link Control Panel (can be found in the system tray during debugging, if using Windows).

Note: This is not the solution to OP's problem, since he is checking the result using pstorage_load. I'm leaving this here since it is one of the first Google hits for the search terms I was using.