Flash crash

RE: Flash crash

bjorn-spockeli — Wed, 19 Oct 2016 14:04:17 GMT

@lerrywu: I cant ses that you are calling ble_stack_init() before calling gap_params_init(), this will lead to the device hardfaulting because us calling sd_ble_gap_ppcp_set which is a SoftDevice function. You need to initialize the BLE Stack before calling functions with sd_-prefix.

RE: Flash crash

Ted — Mon, 03 Oct 2016 07:02:26 GMT

@Bjorn, The project is too big. Attach the main 3 files. The Pstorage was broken, so it make pack.device_name_length and pack.device_name error. The program will cause system reset at function of gap_params_init.flash_crash.zip

RE: Flash crash

bjorn-spockeli — Wed, 28 Sep 2016 09:28:08 GMT

@lerrywu (Ted): I apologize for my late response. The b_pstorge.c attachment is identical to b_pstorge.h, so I am missing the .c file. However, It would be more helpful if you could tell me which specific function the device runs which results in the device entering a "dead loop". The best thing would be if you could share you application project so that I can try to reproduce the issue.

RE: Flash crash

Ted — Mon, 19 Sep 2016 01:33:04 GMT

Yes, I using persitant storage manager to store some datas.I created a block for 40-byte data. I'll call the function of pstorage_creat and pstorage_init_and_load at main function. (system initialization)b_pstorge.c(/attachment/7b920c630eb4bd54e5f5f2f3bd199829)b_pstorge.h

Hi Bjorn, Do you have any update? Is there any wrong in my code?

RE: Flash crash

bjorn-spockeli — Wed, 14 Sep 2016 08:35:41 GMT

Which function specifically? Are you using the persistant storage manager to store any application data? Would it be possible for you to share your firmware? If it is confidential then we can move the case to Mypage which is our closed support portal.

RE: Flash crash

Ted — Wed, 14 Sep 2016 02:20:35 GMT

Yes, the bootloader passes execution to the application. Application runs to some function and causes it run into a dead loop. I want to know why and when the flash is modified and how to protect flash? The address at 0x0003b800 is similar pstorage area.

RE: Flash crash

bjorn-spockeli — Tue, 13 Sep 2016 10:26:44 GMT

Have you tried debugging the non-working product? You should be able to check if the bootloader is running and if it passes execution to the application. If it passes execution to the application then you know that the problem lies in the application.

RE: Flash crash

Ted — Tue, 13 Sep 2016 09:34:23 GMT

Hi Bjorn, The set will flash LED during power on if it is working, but it didn't flash LED. Yes, I am using a bootloader. I used nrfjprog to dump the codes both sets for entire flash (256Kbytes). then I found that the differences are at the address of 0x0003b808 to 0x0003b937. The working set's datas are 0xffffffff between the address of 0x0003b808 and 0x0003b937. But the broken set's datas aren't 0xffffffff between the address of 0x0003b808 and 0x0003b937. Does it make the set broken? How to solve it?

RE: Flash crash

bjorn-spockeli — Tue, 13 Sep 2016 08:56:07 GMT

Hi Ted, could you explain a bit more in detail what you mean by not working? Are you using a bootloader?The flash section below 0x3C000 is usually used by the Persistant Storage Manager to store application data and bonding information.