pstorage problem when turning power off

RE: pstorage problem when turning power off

Mohamed O.Abouzeid — Fri, 31 Jul 2015 14:12:35 GMT

thank you for your effort by the way

RE: pstorage problem when turning power off

Susheel Nuguru — Fri, 31 Jul 2015 13:36:55 GMT

please put a breakpoint in pstorage.c flash_write function. Write down the memory address of the destination and check what you are writing to it.

similarly put a breakpoint in pstorage_load near the memcpy and check if it is the same address you are reading from. This curiosity of mine in this task took all day, i have to now do something productive for Nordic :)
Good luck

RE: pstorage problem when turning power off

Mohamed O.Abouzeid — Fri, 31 Jul 2015 13:11:22 GMT

yes, I changed my code to use the update instead of store but it didn't work, the re-loaded data is 0xff while the stored data before power off is 0x01

RE: pstorage problem when turning power off

Susheel Nuguru — Fri, 31 Jul 2015 13:06:10 GMT

I am 100% sure that it should give the same handles to same address. That part has been well tested. There is no argument with it. did you change your code to use pstorage_update?

RE: pstorage problem when turning power off

Mohamed O.Abouzeid — Fri, 31 Jul 2015 13:04:05 GMT

"after the system reset, when you do pstorage_register again in main, this is ok as it will be considered as first registration and it will give you the handles of memory that you stored your data "

this doesn't happen !!!

RE: pstorage problem when turning power off

Susheel Nuguru — Fri, 31 Jul 2015 13:01:16 GMT

no, system reset will not reset your flash memory. Flash memory will not be touched, all your data there will not be changed, and after the system reset, when you do pstorage_register again in main, this is ok as it will be considered as first registration and it will give you the handles of memory that you stored your data. Again, use pstorage_update instead of store if you write multiple times to the same address. Do not use pstorage_store in your case.

RE: pstorage problem when turning power off

Mohamed O.Abouzeid — Fri, 31 Jul 2015 12:58:28 GMT

thank you very much for your great help, this is applicable "I mean system reset will cause reset to flash memory" with sd_flash_write();

RE: pstorage problem when turning power off

Susheel Nuguru — Fri, 31 Jul 2015 12:55:08 GMT

My apologies, I should have been more clear at that point. I did not tell there about the SystemOFF, sorry for that. When the system wakes up from system off, there is a reset. When your system wakes up from sleep (WFE/WFI) there is no reset, it just continues from next instruction of the sleep (after servicing interrupts). you can just call sd_nvic_SystemReset() instead of calling main and then you will get the behaviour you need.

RE: pstorage problem when turning power off

Mohamed O.Abouzeid — Fri, 31 Jul 2015 12:53:51 GMT

I comment the main function in the LPCOMp_IRQHandler and get the same result, it gives me a fresh copy of another memory

RE: pstorage problem when turning power off

Mohamed O.Abouzeid — Fri, 31 Jul 2015 12:50:15 GMT

what about if I made a reset by removing the battery then putting it again? it will result to the same problem

RE: pstorage problem when turning power off

Mohamed O.Abouzeid — Fri, 31 Jul 2015 12:47:04 GMT

the main function is called again to start the system after wake up, I asked about the wake up Aryan because of that, I mean when the system wakeup, it start running the main again

RE: pstorage problem when turning power off

Susheel Nuguru — Fri, 31 Jul 2015 12:32:07 GMT

Why are you calling main from LPCOMP_IRQHAndler? instead just do a SD_NVIC_SYSTEMRESET. By calling main from LPCOMP_IRQHandler, you are reregistering on the top of already registered pstorage. This is why you see different memory. I will try to explain you in simple. system reset -> reset_handler->main->pstorage_register ->system_reset->reset_handler->main->pstorage_register In this above sequence, because there is a system reset, all RAM contents are lost and pstorage register will always give you same handles to same memory

This is what you are trying to do SYSTEM_RESET->RESET_HANDLER->MAIN->PSTORAGE_REGISTER->SOMETHING->LPCOMP_IRQ->MAIN->PSTORAGE_REGISTER

This is wrong as the second pstorage register knows that there has been a registration before as all the RAM contents are intact, so it will give you different handles and different blocks with different memory. hence you get a fresh copy of memory and you think it is erased. it is not erased, it is just fresh copy of another memory for your fresh pstorage_registration

RE: pstorage problem when turning power off

Mohamed O.Abouzeid — Fri, 31 Jul 2015 11:40:01 GMT

I attached the full code in next answer, thank you for ur great effort

RE: pstorage problem when turning power off

Susheel Nuguru — Fri, 31 Jul 2015 11:34:41 GMT

you do not have to store the block_ids in flash memory, What you are trying to do is the basic functionality for which pstorage was designed. If you can attach your full code, maybe I will look at it. But it is already friday afternoon here ;)

RE: pstorage problem when turning power off

Mohamed O.Abouzeid — Fri, 31 Jul 2015 11:32:04 GMT

no problem, it failed to work by the way, I don't know the reason for causing that, I thinking to save the block ids in the flash memory with sd_flash_write & call it after every power off & not to re init or re-register blocks in memory again, there isn't anything cause or save in flash in my code except psgtorage function

RE: pstorage problem when turning power off

Susheel Nuguru — Fri, 31 Jul 2015 11:26:33 GMT

I did not understand what burning code to chip using the bootloader means? If you just want to flash, you can use keil/IAR to flash it, you can also use nrfjprog or Segger tools to flash. I am sorry, but I did not get exactly what you mean.

RE: pstorage problem when turning power off

Mohamed O.Abouzeid — Fri, 31 Jul 2015 11:20:16 GMT

shall I use the bootloader when I burn my code to the chip ? ?

RE: pstorage problem when turning power off

Susheel Nuguru — Fri, 31 Jul 2015 10:13:02 GMT

no, flash memory is non-volatile, it wont be erase with reset, there is something else in your code which is not what you have showed here.

RE: pstorage problem when turning power off

Mohamed O.Abouzeid — Fri, 31 Jul 2015 10:07:23 GMT

and the reset will cause memory erasing !!!!

RE: pstorage problem when turning power off

Susheel Nuguru — Fri, 31 Jul 2015 09:54:41 GMT

Yes, wakeup from the poweroff will reset the core, so it loose all the handle values. You should register it again like it was done before poweroff to get same handles and same memory block_id

RE: pstorage problem when turning power off

Mohamed O.Abouzeid — Fri, 31 Jul 2015 09:51:00 GMT

I have a question: shall I init the pstorage & register it after every power off ? ? I'm little confused, I guessed that's the reason for erasing the data

RE: pstorage problem when turning power off

Susheel Nuguru — Fri, 31 Jul 2015 09:37:09 GMT

debug into the pstorage library and check what address you are writing to? poweroff does not erase flash memory. Pstorage will not do that atleast. For Sure You have to find out at what point the memory you are trying to write is being erased. Normal debugger is enough to track this.

RE: pstorage problem when turning power off

Mohamed O.Abouzeid — Fri, 31 Jul 2015 09:02:08 GMT

also I tried to disconnect the device & the mobile as I thought that is the reason for not storing in the flash memory then connect it again and turned off the power then turned it on but no gain alsO!!!!

RE: pstorage problem when turning power off

Mohamed O.Abouzeid — Fri, 31 Jul 2015 09:00:14 GMT

it didn't make difference in case of power off & the memory is already erased !!

RE: pstorage problem when turning power off

Susheel Nuguru — Fri, 31 Jul 2015 08:54:49 GMT

instead of storing(pstorage_store) the data, use update(pstorage_update) function. Storing data on already written flash memory will corrupt it.