I warn anybody before using ARM Keil 4.13a. It generates defective code. I have spent several hours with debugging a code that has been already worked. The problem affects local variables of functions and passing arguments. Code has been wrongly compiled without any optimization. I have no courage and time to test optimizations.
I also encourage Keil not to publish Keil 4.13a any more.
Keil 4.12 seems to be OK.
I have a similar experience with Keil 4.13a.
The following code enters an infinite loop when compiling with optimization levels 2 or 3.
unsigned int x = 0x12; while (!((x & 0x02) && (x & 0x10))) {} // turn on LEDs here
I observed the infinite loop by turning on some LEDs after the loop. With O2 and O3 the LEDs remain turned off.
This was tested on the MCB2300 test board with µVision V4.13a.
Hello Roel,
please send a full example project to Keil Support (support.intl@keil.com). As long as Keil Support don't have an example to reproduce the problem we can't say anything about the root cause.
Best regards, Alexander Zaech Senior Support Engineer ARM Germany GmbH
Alexander,
Any luck this time around...?
I send a full project to the Keil support. I hope it proves useful when solving this problem, whether it is my own code or the compiler.
Regards, Roel