Current setup:
LPC2468 uVision3 V3.1.0.903 with flash magic LPC2300.s as the start up file
We have a simple C file to set GPIO's as outputs and set them high. It compiled correctly and was programmed into the ARM successfully. The voltage measured on these GPIO's was a strange 2.3v where it should have been 3.3V. Some of the GPIO's do have a correct 3.3v, but not all of them. We then used a LPC2400.s startup file from the trial version of uVision4 to compile and program. The same issue persisted and, in addition, the software debugger would throw an error executing the startup file.
Using the above C file along with the trial verison of uVision4 and the LPC2400.s startup file, the GPIO's behave as expected.
We are using uVision3 because that is what our license covers and we have gone over the file size limits of the trial version. Our small school budget does not allow us to renew our license.
-Students from the University of Florida