topic whether labels or security bytes overwritted in CodeWarrior for MCU

whether labels or security bytes overwritted

hotdog — Sat, 04 Mar 2006 21:04:35 GMT

I am using codewarrior development studio for HC(S)08 special editon(V3.1). as i know, some labels are defined at $FFF6,$FFF8,$FFFC , but the security bytes are purposed to be stored at locations $FFF6–$FFFD. i wonder whether the security bytes could be overwritted when the labels and security bytes are used.

Message Edited by hotdog on 03-04-200607:13 AM

Re: whether labels or security bytes overwritted

peg — Sun, 05 Mar 2006 06:41:02 GMT

Hi Hotdog,

These addresses are in the Vector table the security code is whatever the vectors need to be. If you are not using some of the vectors you can put something else in there. It is better to use a dummy ISR (or several) and point to it to scramble up your security code. This way if the interrupt is somehow triggered your code won't "blow up"

Regards Peg

Re: whether labels or security bytes overwritted

hotdog — Sun, 05 Mar 2006 12:00:35 GMT

Thanks for your help, Peg.

Best Regards.Hotdog