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error using in-line function

dinh vuong anh

void test()
{
#pragma asm
MOV R0,#55H
#pragma endasm
}
this code generates A45 error:undefined symbol

  • 0

    If you just mindlessly keep reposting the same question withou answering the requests in the previous posts, the jack of diamond will be a king before your problem get solved.

    WErik

  • 0

    You ARE using the SRC directive, aren't you?

    When I compile your example, I get the following .SRC file.

    ; .\main.SRC generated from: main.c
; COMPILER INVOKED BY:
;        C:\Keil\C51\BIN\C51.EXE main.c
;        BROWSE DEBUG OBJECTEXTEND CODE
;        PREPRINT SRC(.\main.SRC)


NAME	MAIN

?PR?test?MAIN        SEGMENT CODE
	PUBLIC	test
; void test()

	RSEG  ?PR?test?MAIN
test:
			; SOURCE LINE # 1
; {
			; SOURCE LINE # 2
; #pragma asm
; MOV R0,#55H
	  MOV R0,#55H
; #pragma endasm
; }
			; SOURCE LINE # 6
	RET
; END OF test

	END

    When I assemble the SRC file, I get the following:

    A51 MACRO ASSEMBLER  MAIN
09/16/2004 10:10:27 PAGE     1


MACRO ASSEMBLER A51 V7.09
OBJECT MODULE PLACED IN main.OBJ
ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE main.SRC SET(SMALL) DEBUG EP

LOC  OBJ            LINE     SOURCE

                       1     ; .\main.SRC generated from: main.c
                       2     ; COMPILER INVOKED BY:
                       3     ;        C:\Keil\C51\BIN\C51.EXE main.c
                             ;        BROWSE DEBUG OBJECTEXTEND CODE
                             ;        PREPRINT SRC(.\main.SRC)
                       4
                       5
                       6     NAME    MAIN
                       7
                       8     ?PR?test?MAIN        SEGMENT CODE
                       9             PUBLIC  test
                      10     ; void test()
                      11
----                  12             RSEG  ?PR?test?MAIN
0000                  13     test:
                      14                             ; SOURCE LINE # 1
                      15     ; {
                      16                             ; SOURCE LINE # 2
                      17     ; #pragma asm
                      18     ; MOV R0,#55H
0000 7855             19               MOV R0,#55H
                      20     ; #pragma endasm
                      21     ; }
                      22                             ; SOURCE LINE # 6
0002 22               23             RET
                      24     ; END OF test
                      25
                      26             END

SYMBOL TABLE LISTING
------ ----- -------


N A M E             T Y P E  V A L U E   ATTRIBUTES

?PR?TEST?MAIN. . .  C SEG    0003H       REL=UNIT
MAIN . . . . . . .  N NUMB   -----
TEST . . . . . . .  C ADDR   0000H   R   SEG=?PR?TEST?MAIN


REGISTER BANK(S) USED: 0


ASSEMBLY COMPLETE.  0 WARNING(S), 0 ERROR(S)

    I get no errors or warnings. Perhaps you should post the listing file with the error message so one of us could give you more helpful feedback.

    Jon

  • 0 

    void test()
{
#pragma asm
MOV R0,#55H
#pragma endasm
}
    Why are you trying to do this?

    The Compiler uses these registers for its own purposes - you should not be messing with them.

    If you really need parts of your application in assembler, then write them in a separate assembler module, in Assembly language, and call them from 'C'

    The Compiler is probably doing you a favour by refusing to compile this!