compile assemble to C- code ?

[BigT]

I'm new to the world of C and try to start walking. I have below code in assemble language and would like to compile it in C. Can someone let me know how to and/ or do it?

; set processor option ..........................
 
    Processor 16F84
 
; Register Label Equates..........................
PCL        EQU        02    ; Program counter
PORTA    EQU        05        ; Port A 
PORTB    EQU        06        ; Port B 
Count     EQU        0C        ; Counter (1-6)
 
; Register Bit Label Equates......................
Roll     EQU        4        ; Push Button Input
 
; Start Program...................................
 
;Initialize (Default = Input)
MOVLW    b'00000001'        ; Define RB1-7 outputs
TRIS    PORTB            ; and set bit
GOTO     reload            ; jump to main program
 
; Table subroutine................................
table     MOVF    Count,W    ; Put count in W
        ADDWF    PCL    ; Add to Programm Counter 
        NOP    
        RETLW    00C        ; Display 1
        RETLW    0B6        ; Display 2
        RETLW    09E        ; Display 3
        RETLW    0CC        ; Display 4
        RETLW    0DA        ; Display 5
        RETLW    0FA        ; Display 6
 
; Main Loop.......................................
reload    MOVLW    06        ; Reset counter 
        MOVF    Count    ; to 6
 
start    BTFSC    PORTA,Roll    ;Test button
        GOTO    nexnum        ; Jump if not presseed 
        CALL    table        ; get display code 
        MOVWF    PORTB        ; Output isplay Code
        GOTO    start        ; start again
 
nexnum    DECFSZ    Count        ; Dec & Tets Count = 0?
        GOTO    start        ; start again 
        GOTO     reload        ; restart count if zero
 
        END
 

Thanks for all your help in advance,
T

[weaknessforcats]

There are various disassemblers around. Google is your best bet. Of course, you will lose all the comments and the variable names.

If I knew what trhe assembly does, I would just learn enough C to write it myself and skip the disassembler.

[Banfa]

Please use code tags it makes you code easier to read.

So this is a PIC micro-processor right? It looks like PIC assembler and I believe 16F84 is a PIC part. It looks like Port A is being configured as an input and the comment indicates an attached button and port B as an output, from the ouput values I would guess port B is connected to a 7 segment LED (or LCD?) digit display.

Everytime the button is pressed it displays the next digit in sequence 1, 2, 3, 4, 5, 6 on the display looping back from 6 to 1.

I doubt you will be able to find a dis-assembler to convert back to C, this looks to me to be directly written in assembler and is pulling tricks (in the table sub-routine) that are unlikely to have a conversion to C, that is directly altering the program counter to cause the program to execute a different return instruction to return a different value from the function.

However the function of the program is so simple that I would have thought re-writing it in C would be a fairly simple matter even for someone with limited C experience.

[BigT]

Thanks for taking the time and sending me some answers. Yes it is for a PIC 16F84 processor. I'll google and see if i find something. I'm not concerned loosing the text or comments.
The problem is i got pretty much no knowledge of C. I learned assemble language but that is processor specific. I'll hit the books hard and see if i can put something together since Banfa said its a pretty easy routine.

[weaknessforcats]

The problem is i got pretty much no knowledge of C.

C is a replacement for assembly language. You can learn C over a weekend. There are only 43 operators.

If you keep your code simple you will be amazed how much you can do in a very short time. It is truly faster to write C than to write assembly.

[Banfa]

If you keep your code simple you will be amazed how much you can do in a very short time. It is truly faster to write C than to write assembly.

Not to mention once you know it you will be able to program for any microprocessor with a C compiler which nowadays most of them do have (if not a C++ compiler).

[BigT]

Thanks again. Please close this post and i'll check back if get lost writing C with some code questions.

T