About FLASH writing to "DE C0 AD DE FE 01 1E F1"

Question

SDK: 15.3.0 Example: ble_app_multirole_lesc Device: EYSHJNZWZ (nRF52832) 
 I called "pm_init" to do "PeerManager". Then, a part of FLASH has been written to "DE C0 AD DE FE 01 1E F1". Please tell me the cause of this. Also, please tell me the meaning of this written value.

tesc · Accepted Answer

Hi, 
 This is the page tag for Flash Data Storage (FDS) , which is the library used by Peer Manager for storing peer information in flash. As you can see there are two possible values for the second word; one for swap pages and one for data pages. The pages reserved for FDS should not be used for other purposes. 
 Regards, Terje

tesc · Answer

Hi, 
 For all of the SDK examples using a SoftDevice, the SES project is set up so that both the application and the SoftDevice gets programmed to the nRF. If you program the hex file through other tools, you must make sure to program both the application hex file and the correct SoftDevice. 
 Please note also that nRFgo Studio is deprecated, as functionality is replaced by the nRF Connect Programmer app or the nrfjprog command line programming tool (part of nRF Command Line Tools ). 
 Regards, Terje

tesc · Answer

Hi, 
 I recommend that you try with the examples/peripherals/blinky example first, as with that example it is very easy to see if everything is running as intended or not. 
 Recommended tools are nRF Connect Programmer application or nrfjprog, see links in my previous post. 
 Regards, Terje

tesc · Answer

Hi, 
 takashina hiroki said: What should I check with the examples/peripherals/blinky example? 
 Check to see that you are able to program the application (and SoftDevice) correctly with the programmer that you use. The blinky example is well suited for that, as it is very easy to confirm it works as expected (it blinks LEDs.) 
 I see that you found out what was the issue. I am happy to see that! 
 Regards, Terje

takashina hiroki · Answer

I confirmed using the examples/peripherals/blinky example. I have confirmed that programmer can program the application (and SoftDevice) correctly. As I said above, it seems that it was a program error.

About FLASH writing to "DE C0 AD DE FE 01 1E F1"

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