Pstorage and NUS not working together

RE: Pstorage and NUS not working together

RPDben — Tue, 19 Apr 2016 08:22:02 GMT

This worked perfectly. Thanks so much!

RE: Pstorage and NUS not working together

Pavan kumar — Mon, 18 Apr 2016 17:22:50 GMT

Previously I've got the same issue with SDK11 so I'm using fstorage instead of pstorage that resolves my issue. So if possible once try fstorage. hope you all the best

RE: Pstorage and NUS not working together

Petter Myhre — Mon, 18 Apr 2016 14:22:39 GMT

The events from the SoftDevice, both BLE and system events (for pstorage), are run in NRF_APP_PRIORITY_LOW(3) context. You are calling your pstorage functions in this context and you have a while where you are waiting for the flag to be cleared. The flag is cleared by a system event that is run in the same context, so it will not interrupt your while, and thus the flag will not be cleared. Try running your pstorage functions from main context instead. For example set a flag in nus_data_handler() and in your main loop:

// Enter main loop.
for (;;)
{
    if(write_flag)
    {
        	pstorage_custom_read(BLOCK_1, &custom_data);
            custom_data += 1;
            pstorage_custom_update(BLOCK_1, &custom_data);
            write_flag = 0;
    }       
    power_manage();
}

RE: Pstorage and NUS not working together

RPDben — Mon, 18 Apr 2016 10:41:47 GMT

Petter, I have attached a project that proves incorrect functionality. The while loop at the end of the pstorage_custom_init() function is never left. I assume this is because the callback handler is not called for whatever reason. thanks for all your help so far!

RE: Pstorage and NUS not working together

RPDben — Mon, 18 Apr 2016 10:01:18 GMT

Hi Petter, in the process of getting code that reproduces the error now. I have narrowed the error down to the callback not always being called. I assume this means that the pstorage operation has not finished and the code is waiting for the callback to be called to set the wait flag to 0. I am unsure why it is not completing though. I thought it might be my advertising interval being too low, so I upped that. Do you know of any other common practices that cause this error?

RE: Pstorage and NUS not working together

Petter Myhre — Mon, 18 Apr 2016 08:48:10 GMT

I'm not sure. It would be helpful if you could share you complete project, or some code that reproduces the issue. So I can debug it here.

RE: Pstorage and NUS not working together

RPDben — Fri, 15 Apr 2016 12:14:58 GMT

I end up if nrf_drv_wdt_feed();. I cannot be sure if it is from these while loops or somewhere else. However, I know if is pstorage that is causing the issues as if I remove this the program works fine. I am using device manager if that changes things?

RE: Pstorage and NUS not working together

Petter Myhre — Fri, 15 Apr 2016 11:51:23 GMT

So you are not calling pstorage_custom_read(), pstorage_custom_clear() or pstorage_custom_update() but you still end up in one of the while loops?

RE: Pstorage and NUS not working together

RPDben — Fri, 15 Apr 2016 11:45:14 GMT

Hi Petter, I have updated the question with my files

RE: Pstorage and NUS not working together

Petter Myhre — Fri, 15 Apr 2016 11:26:29 GMT

I think you should upload some more code, maybe even your complete project?

RE: Pstorage and NUS not working together

RPDben — Wed, 13 Apr 2016 15:49:14 GMT

Sorry, I guess "Appears to Freeze" would have been a better term. Whenever I pause the debugger during the issue it appears to be feeding the watchdog. While waiting for the pstorage functions to finish I feed the watchdog to avoid the device resetting as below. I believe I must be stuck in one of these while loops. However, the code should not be touching pstorage at this point so I am slightly confused as to why the code is here.

pstorage_wait_handle = base_handle.block_id;
	pstorage_wait_flag = 1;
	
	// Request clearing of all blocks in the module.
	retval = pstorage_clear(&base_handle, 4 * 16);

	if (retval == NRF_SUCCESS)
	{
			while(pstorage_wait_flag) { nrf_drv_wdt_feed(); }
	}

RE: Pstorage and NUS not working together

RK — Wed, 13 Apr 2016 15:42:47 GMT

Devices don't freeze - they are somewhere doing something. If you hit break in the debugger, where is it and what is it doing? If it's not the app_error_handler(), is it the hardfault handler?