Hello all,
I do not wish to repeat myself as I have addressed this issue in a recent thread, but this is too important to turn a blind eye to as even lives could be at stake which certainly makes it worth a separate thread: I believe I managed to conceive a program that causes a failure of RTX on a LPC2468/2478 (simulator does not induce the failure). Quite some people have reported problems with RTX on this forum, so hopefully they can download my stripped test program here dl.getdropbox.com/.../LPC2468_RTX_Demo_min.zip to try there own variants. I have of course informed Keil support about this issue and I am currently waiting for feedback. I would very much appreciate any feedback you might have.
Tamir
A number of chip vendors have recommended the use of a couple of nop after disabling interrupts. Any combination of instructions that takes - at least - the required number of cycles should do fine.
The only issue is that the exact number of cycles isn't always known because the manufacturer haven't published it in any datasheet.