I have 6 ports that i am using like buttons and i have an interrupt by falling edge. I have to use low level but don´t work because all the six pins (PTC1 to PTC6 tha i am using) stay in 0V. I have pull-up in all. On falling edge this problem don´t appear. I am trying to use the function GetFieldValue but doesn´t work correctly. How can i read the pin PTC1 or PTC2 or PTC3 for example. I need to read one pin but the function doesn´t work correctly. Anybody can help me?