RAM reset after softreset | nrf52832 | sdk 15.2 | softdevice 6.1.0

[Somesh Burkule]

Hi,

I need to reset RAM after softreset. As I read product specification, RAM cannot be cleared after softreset or CPU lockup.

Please see below image for reference.

How can I clear total RAM after softreset( NVIC_SystemReset() )?

[Vidar Berg]

Hi,

It's usually your startup code that's responsible for re-initializing (or resetting) the RAM.  Notice the statement below the table you referred to: "The RAM is never reset, but depending on reset source, RAM content may be corrupted.". Maybe you give some more background on what you are trying to achieve?

[Somesh Burkule]

Hi Vidar,

thanks for your quick response.

I need to clear all buffers and variables used in application code same as hardreset.

[Vidar Berg]

As I indicated earlier, the RAM is never reset, regardless of the reset source.

[Somesh Burkule]

Is there any way to clear it using software API? 

rather best solution is to initialise all buffers at the start in main().

[Vidar Berg]

How are you declaring the buffers in your code? Global variables that are not assigned a value will automatically be initialized to '0' by the startup code (before reaching main()). Anyway, memset() is a standard function you can use to clear a block of memory.

e.g.,

memset(<p_buffer>, 0, sizeof(buffer))

[Somesh Burkule]

Hi,

Can you please clear me that what is mean by RAM reset? which type of memory is cleared after RAM reset?

I am asking this because as per my understanding global variables are also part of RAM and they cannot be initialise again when softreset is done in nrf52832.

As I using other MCU's, they always resets RAM when there is softreset.