how can I detect uC reset p89lpc9221 ?

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drdigital

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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: 
code unsigned char RSTDetect = 0;
but it is unmodifiable during the code, so I cant update it .

so, any other ways ??
 

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

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.
 

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