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using labels

Justin Moses

I am a computer engineering student using Microvison2. I am trying to create a small program that uses an sjmp loop comand but I don't know how to make labels in the software. Any help would be greatly appreciated.

  • 0 in reply to Andrew Neil

    I have looked in the manual and cannot find what I am looking for.

  • 0 in reply to Justin Moses

    I have looked in the manual and cannot find what I am looking for.

    There is more than one manual. Which manual did you look in? The "Macro Assembler and Utilities" manual (a51.pdf) describes the (Keil) assembler syntax relatively well.

  • 0 in reply to Justin Moses

    If you are using an SJMP, then you are programming in assembly language.<br>
    Open the "Macro Assembler and Utilities" manual. <br>
    Look in the index.<br>
    On page 440, it says "Labels.....73"<br>
    On page 73, labels are fully described.

  • 0 in reply to Richard Collett

    First of all thank you. I was looking in the C51 manual. I understand how to use labels. The problem I am having is entering them in. I am unfamiliar with this software so bear with me. <br><br>
    <br><br>
    I am entering in all my code in at the command line. My code looks something like this. <br><br>
    <br><br>

          mov P1,#10010011
loop:
      mov c, P1.0
      cpl c
      andl c, P1.1
      orl c, P1.7
      mov P1.4, c
      sjmp loop
      END
    <br><br>
    now I know that I have to type <br><br>
    asm mov P1,#10010011
    but what do I type for a label<br><br>
    I have tried<br><br>
    asm Loop: mov c, P1.0
Loop: asm
asm [loop:] mov c, P1.0
loop:
    <br><br>
    I am assuming that this is a syntax problem. Thank you again for your help.

  • 0 in reply to Justin Moses

    If you are really keen to write assembly language, the path of least resistance is to write an assembly language module explicitly and avoid coding it in in-line assembly.

    Use the SRC option to build an assembly language template if you must.

  • 0 in reply to Justin Moses

    Ahhh, so you are trying to embed some assembly language in a C program. (Hint, supply more information in future).

    I haven't tried it in the Keil C, but this works in Borland C:
    =======================
    asm mov P1,#10010011

    loop:

    asm mov c, P1.0
    asm cpl c
    asm andl c, P1.1
    asm orl c, P1.7
    asm mov P1.4, c
    asm sjmp loop
    =======================
    i.e. the label is just a C statement, it is not ASM'ed.

  • 0 in reply to Richard Collett

    I am not trying to embed it in a C program. What you saw was pretty much all my code. My teacher wants us to write a program in-line (he didn't show us any other way) That is why I am having so much trouble. I know of another assembly program. He said he wants the listing file and the hex file. I know of a unix compiler that I can use. I need to play with microvision some more and hopefully figure out how to bypass the in-line compiler. By the way

    loop:

    as a command is not valid.

    I would really like to thank you for all the help you guys have provided me.

  • 0 in reply to Justin Moses

    "My teacher wants us to write a program in-line (he didn't show us any other way)"<br>
    <br>
    Talk to him!