PIN Interrupt

[Sathiya_T]

hi,

i am configure  PIN Interrupt in lpc55s16  (level sensitive or active level triggering) using below the registers:

Intr_No=0;

PINT->ISEL = (1<< LOW_LEVEL);

PINT->SIENR = 1UL << (uint32_t)Intr_No;

PINT->SIENF= 1UL << (uint32_t)Intr_No;

i want to configuration for using level sensitive active low, and active high

[Pablo_Ramos]

The following SDK examples show you how to use the Pin interrupt & pattern match:

Hope it helps you!

[Sathiya_T]

In the SDK example pin interrupt level triggering interrurpt is worked but sometimes doesnt worked. controller not detect  varying voltage, 

using 3.3 v  controller is detect the interrupt in level triggering same LOW&HIGH.

as the same 1.2 v controller is not detected only sometimes i got interrupt.

interrupt detect voltage for controller is 0.8v but why? this not happened continue interrupt signal.

[frank_m · Accepted solution]

It seems you don't understand what "pin level interrupt" means in this context.
This term relates to the logic levels "H" and "L", which are defined and fixed by hardware and supply voltage. You cannot detect other voltage levels that way.

If this is your objective use an ADC, or specific external custom hardware.