MSP430FR5959: memory gets corrupt

Hello Anushka,

Do you have any routines running in your application that write to variables that are stored in FRAM?

Are you using a bootloader in your application?

hello sir

yes we are using variables that writes FRAM but it is rare condition. At noramal application runing no variable to be writen in FRAM
and no we are not using bootloader in my application

routine to write variables is given below

delaration of variable

#pragma PERSISTENT(au16_config)

unsigned short au16_config[WDOG_LOG_IN_16BIT] =
{
0
};
#endif

To read from FRAM (this will execute at power On )

memcpy(&un_RegHoldingBuf.st_config.u16_slaveId, &au16_config,
sizeof(au16_config));

where un_RegHoldingBuf.st_config is a configuration structure size is 85 bytes


To write FRAM (this will only execute when user wants to change some paramertes )

memcpy(&au16_config, &un_RegHoldingBuf.st_config.u16_slaveId,
sizeof(au16_config));

where un_RegHoldingBuf.st_config is a configuration structure size is 85 bytes
/******************************************************************

and pin no 21(TEST/SBWTCK) and pin no 22(RST/NMI/SBWTDIO) pin is open at hardware side no passive componets to be connected.
this pin is connect directly to connectors for programing purpose

Clearly your program has a problem where at some point it writes over the FRAM leaving few traces behind. I suggest you enable the MPU to protect your code and the when the write violation happens, you can see what the system state was at that time.

Hi Anushka,

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how to enable MPU to protect my code. 

And how to check and verify that this problem is been solved. because it is rare condition. how to enable MPU to protect code memory for corruption. please explain this with example.  

dear sir 

please explain in details with examples about MPU and its usage to my existing code.