Hi all,
I am using lpc2138 working with EXT3 interrupt. hardware interrupt works fine for first time when I reset the board. But thereafter it does not detect any interrupt on EXT3. Plz suggest any re-initialization I have to do to detect hardware interrupt next time onwords.
Thank you in advance.
Thanks for showing interest.
I am doing this in my ISR
EXTINT = 0x08; //clear EINT3 flag VICVectAddr = 0; /* Update VIC priorities */
Then also 2nd time onwords it is not working.
Do you have edge-trigged or level-trigged interrupts?
If level-trigged, then it will not be possible to reset the interrupt until the interrupt signal is back to idle.
I am using edge trigger.