Hi, I've a strange problem with fast GPIO on LPC2378. Specifically, I can neither set nor reset the pin 4.1 of GPIO port, while I can set and reset pin 4.0, 4.2 and 4.3. Moreover, if I execute the code step-by-step with Ulink2 debugger I find a problem also with pin 4.2. In fact with my oscilloscope I see that after the reset instruction FIO4CLR = 0x04; I see the level of the pin goes low but soon after it goes suddenly to high level. Moreover if I watch the value of FIO4PIN on the watch window I see a value different from the one displayed by the peripheral window of FAST GPIO. I suspect there is bad interaction between uVision and my software execution. Is there any register I have to configure to avoid this strange behaviour?
Thanks and bye
Demis