Legal Removal Request

Post: I tried running your code on my IO Pi Plus and the interrupt pins IA and IB are 0V until one of the inputs is pulled high. One problem I can see with your code is the iopiinterrupt() function does not reset the IO Pi interrupts when it is triggered so the IA and IB pins will stay high after they have been triggered once. Try changing the function to the following code and see if the interrupts behave properly. [pre][code]void iopiinterrupt(){ printf("interrupt called \n"); reset_interrupts( 0x21); }[/code][/pre] If you still have problems check that your inputs have pull-down resistors to keep them low. If you have inputs attached, for example, a button, that does not pull down to ground when it is off the input will be left in a floating state which could cause the interrupts to trigger randomly if any interference or capacitance on the cable pulls the voltage high enough for the IO chip to see it as a high input.