Tool/software: Linux
we use GPIO4_11 as a interrupt input, it is pulled up on 3.3V.
when interrupt signal come, it is turn to low level to tigger the ARM IRQ handler. remains 2us low, then back to high level at 3.3V.
usually the interrupt signal is 8us a cycle when it comes.
at now our problem is the ARM GPIO interrupt handler is not work stablelly. we make a counter in the handler, it count not the same as
the total GPIO interrupt number in fact.
what we should do to work on the interrupt missing?
