how can I detect uC reset p89lpc9221 ?

[drdigital]

Hello every one,
I'm testing my code and I need to check if the uC reseted in the middle or not as I leave it runing for 7 hours and not setting beside it.

I tried writting a value to the ROM :

code unsigned char RSTDetect = 0;

but it is unmodifiable during the code, so I cant update it .

so, any other ways ??

 

[Lord Loh.]

Oscilloscopes can be set to count events or trigger at specific events.

 

[Rajppd]

further to add. Adjust the sweep of the scope to suit to your requirement. You can use a roll mode also, usually seen with HP oscilloscopes. You should be able to see the reset happen.