I noticed in the demo for the DE2 Altera board that the GPIO_1 connections does not match the specifications given by the user manual. for example, I noticed that GPIO_1 was used for the CCD_MCLK and not GPIO! which is the pin connected to the XCLKIN pin of the camera module. However the case, when I changed the pin in the demo code, the result went wrong (looking into the lcd touch LTM). the correct pin is still . I don't understand why this is so.