Hi All,
Could anyone please tell me which generic register/location in memory can be used for storing a bit value which will not get reset after a CPU reset? I need the register to hold the value after a CPU reset so that I can know if a reset has happened successfully or not.
I am trying to use the SYS_NVFLAGSSET register. As I understand, this is a general purpose flag register. So I am trying to write certain value to it, which can be used later for checking. However, I am unable to write any value to it using the STR instruction. I understand that this register is at an address of 0x00000038. On checking the contents after writing, I see the default value of 0x00007F02 still loaded. (However, on researching I found this is a device specific register and may not be generic to ARM Cortex-M4 processors!)
Please let me know the correct register and if this approach is right or not.
My main purpose is that I want a value of 1 to be written to a register so that after a CPU soft-reset this value is retained and can be checked to see if the CPU has been resetted or not.
Thanks & Regards,
\Kashif
Message was edited by: Kashif Updated with newer inputs