PIC24 NOSTVREN equivalent?

[benoitstjean]

COMPILER: 4.132
DEVICE: PIC24HJ128GP306

Hi all,

I am having a problem which is very hard to find. To make a long story short, I am receiving serial characters on one of the UARTS on the PIC.

The UART is tied to a cell modem with the UART configured as multiplexer mode therefore the incoming and outgoing data is framed with special characters. So, as I receive the characters from the modem, I must figure-out what part of the frame it is. Once I determine what the character is, I store it in a string. Once the string is full (after the last framing byte is received), I pass the string into an event queue for manipulation later.

Then, on occasion and at random, my PIC will reboot. I am sure this is caused by the characters being received. I think that somehow the character string overflows its length then writes in memory somewhere and reboots.

Is there an equivalent of the NOSTVREN fuse to prevent the PIC from rebooting?

Or is there anything I can do to NOT reboot the PIC? This is causing me lots of grief and I've been on this problem for a while now and I just can't figure-out what's going on.

I noticed also that there are two interruptions #int_ADDRERR and #int_STACKERR but I've never used them. If I activate those two interrupts and I run into a memory error, will the interrupts be generated instead of rebooting the PIC?

Any information will help.

Thanks!

Ben

[Ttelmah]

The first thing to do is increase the stack size.
#build STACK=xxxxx

The default stack _is_ too small if your code does anything complex with arithmetic, or significant printf handling.

The address error and stack error cannot be disabled. They are always on. What happens is that if there is not a handler present, they cause a reset. Add a handler, and this will be called instead, but you you then need to work out what you are going to do, since returning from the handler (for the stack error), will result in the code going somewhere it shouldn't. For the address error, corrupted memory values.

If the buffer is overflowing, you need to write your code to properly limit where it can write.

Best Wishes

[benoitstjean]

So how big would you recommend? This command is new to me so i don't have the slightest clue what to put.

Thanks