Cortex M3 bootloader corruption

[Geethpriya]

Hi,

What are the reasons that can create Cortex M3 bootloader corruption?
In my board, Randomly bootloader is getting corrupted.

 

[Cicero]

If you're talking about a self written bootloader, (as opposed to the ROM bootloader) I've had this kind of issue due to EMC issues before.

To fix it, I had to do several hardware EMC fixes to my PCB, mostly added ESD protection.

I also made sure any flash write function in my software had a software lock on it, in other words additional checks that a flash write was desired and it wasn't some strange behaviour.

 

[Geethpriya]

Thanks for the reply. I will check come back.

 

[Geethpriya]

In which section of the circuit you have added the ESD protective components?

 

[Cicero]

It all depends on where the ESD is getting in for your board. There is no one-size-fits-all protection for this type of problem.

You need to do tests, perhaps in a lab to see if you can reproduce the issue.

As a temporary attempted fix, you can try to remove or make any flash write code more robust.