Very simple question - using "NOOP"

[agaelema 39]

I'm starting to learn the Stellaris programming.

 

How I use the "no operration" or "noop" in the Stellaris. I'm using the CCS 5.5.

In the MSP430 I use "_nop();", but in the Stellaris this code don't work.

 

Thanks.

[monpetit 0]

"this code don't work" means compile error, or unexpected behavior?

[Lyon 3]

Hi,

 

Some comments first:

In general, depends on tool chain - some usual tools have a syntax like this:

__asm("        nop\n");

The space before instruction is a TAB for some toolchains - take care.

And some other comments (from ARM manual): 

NOP does nothing - and is not necessarily a time-consuming NOP. The processor might remove it from the pipeline before it reaches the execution stage. Can usually used for padding, for example to place the following instruction on a 64 bit boundary.

L.

[agaelema 39]

In the first time that I used "_nop_()", the command not worked and the CCS jumped the break point, but now worked well.

 

One new question, when I started a new project (with StellarisWare) appears one warning "#10210-D creating ".stack" section with default size of 0x800; use the -stack option to change the default size". This warning doesn't appeared on the first test, what it means?

 

I used this site as a guide for using the StellarisWare: hackaday.com/2012/10/14/using-stellarisware-with-the-launchpad/

 

Thanks for the help.

[agaelema 39]

@@Lyon, I tested "__asm("        nop\n");" and worked well too, thanks.