Chief Delphi - Assembly code in C?

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Assembly code in C?

I have a quick question: is it possible to use assembly code in C?

My experience was that in C++ (oh, how I miss C++), you could have code like this:

Code:

_asm

{

     /* Assembly code goes here */

}

I was wondering if the same thing would be possible with the compiler supplied by FIRST?

Thanks in advance!

Re: Assembly code in C?

Quote:

Originally Posted by red_alert_13

I was wondering if the same thing would be possible with the compiler supplied by FIRST?

This is called 'inline assembly' and is a nonstandard feature of most compilers, and they all seem to implement it in a slightly different way. Luckily, though, you don't have to look any further than the default code to find an example.

From ifi_startup.c:

Code:

void _startup (void)

{

  _asm

    /* Initialize the stack pointer */

    lfsr 1, _stack lfsr 2, _stack clrf TBLPTRU, 0 /* 1st silicon doesn't do this on POR */

    bcf  FPFLAGS,RND,0 /* Initialize rounding flag for floating point libs */



    /* initialize the flash memory access configuration. this is harmless */

    /* for non-flash devices, so we do it on all parts. */

    bsf 0xa6, 7, 0

    bcf 0xa6, 6, 0

  _endasm



loop:



    Clear_Memory();

  _do_cinit ();

  /* Call the user's main routine */

  main ();



  goto loop;

}                               /* end _startup() */

There's several other examples in that file as well.

Re: Assembly code in C?

Thanks for your response! That clears up a lot of questions.

Re: Assembly code in C?

Just in case anyone else might find assembly code useful, I found a link containing a list of commands - I'll have to test it but from the source code I've seen these are the commands used to program low level functions for the robot controller.

http://www.picbasic.co.uk/forum/showthread.php?t=222