NetBurner Community Forum

In the examples, the following code is used for stack alignment:
asm( " .align 4 " );
DWORD MyTaskStk[USER_TASK_STK_SIZE] __attribute__( ( aligned( 4 ) ) );

Are both directives needed? I would think the .asm one isn't needed since the aligned attribute does the same thing. I saw some notes about older versions of GCC not working correctly so is that the reason?

-Bob

I cannot find any examples that use


but you are right that you should not need both forms of alignment.

You can always use the macros defined in ucos.h and documented in uCOSLibrary.pdf:
OSSimpleTaskCreate( function, priority );
OSSimpleTaskCreatewName( function, priority, name );

these macros should force the stack alignment to be correct. Examining the macro definitons in ucos.h, there is no asm(" .align 4") line

ps I am referring to the latest release 2.6.8, but I don't think this has changed for a while.

I guess it wasn't in the shipping examples but in the Example for OSTaskCreate in the uC/OS manual. Thanks for the info.

-Bob