C51嵌入汇编的问题

只看该作者 · 2011-9-8 10:12

我只要在程序里嵌入汇编，彩屏就会不显示。
谁遇到过这种情况？如何解决？谢谢！

1万 · 2011-9-8 10:29

可能你的汇编有问题

只看该作者 · 2011-9-8 11:16

C程序中.h文件
#define SetBit(sfr,bit) (sfr|=(1<<bit))
#define ClrBit(sfr,bit) (sfr&=~(1<<bit))
#define SetM7_BUSWR() SetBit(P1,2)
#define ClrM7_BUSWR() ClrBit(P1,2)
.C文件
ClrM7_BUSWR();
SetM7_BUSWR();
我嵌入的汇编
#pragma asm
  CLR  P1.2
  SETB P1.2
  #pragma endasm
有问题吗？

只看该作者 · 2011-9-8 11:25

LZ先看看你编译时有没有警告
有的话坚决消灭掉

只看该作者 · 2011-9-8 13:18

编译时有30多个警告，不知道怎么去掉。还有嵌入汇编前后工程窗口不一样

只看该作者 · 2011-9-8 13:29

有32个警告。Build target 'Target 1'
compiling M7_B2.C...
assembling M7_B2.src...
assembling extern.A51...
linking...
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  _SPRINTF
MODULE:  M7_B2.obj (M7_B2)
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?_SPRINTF?BYTE
MODULE:  M7_B2.obj (M7_B2)
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C?IMUL
MODULE:  M7_B2.obj (M7_B2)
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C?CLDPTR
MODULE:  M7_B2.obj (M7_B2)
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C?CSTPTR
MODULE:  M7_B2.obj (M7_B2)
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C?CLDOPTR
MODULE:  M7_B2.obj (M7_B2)
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C_STARTUP
MODULE:  M7_B2.obj (M7_B2)
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C?FCASTL
MODULE:  M7_B2.obj (M7_B2)
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C?FPMUL
MODULE:  M7_B2.obj (M7_B2)
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C?LSTXDATA
MODULE:  M7_B2.obj (M7_B2)
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C?FCASTI
MODULE:  M7_B2.obj (M7_B2)
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C?FPDIV
MODULE:  M7_B2.obj (M7_B2)
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C?FPADD
MODULE:  M7_B2.obj (M7_B2)
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C?SLCMP
MODULE:  M7_B2.obj (M7_B2)
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?IMUL
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 4CFBH
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?CLDPTR
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 4D58H
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?CLDPTR
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 4D96H
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?CSTPTR
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 4D9BH
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?IMUL
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 4F33H
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?CLDOPTR
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 4F5DH
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?FCASTL
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 48BFH
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?FPMUL
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 48CAH
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?LSTXDATA
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 48D0H
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?FCASTI
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 48DCH
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?FPMUL
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 48E6H
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?FPDIV
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 4906H
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?FPADD
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 4911H
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?_SPRINTF?BYTE
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 4914H
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?LSTXDATA
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 4923H
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  _SPRINTF
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 492CH
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?SLCMP
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 4C40H
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?SLCMP
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 4C70H
Program Size: data=16.0 xdata=74 code=20719
creating hex file from "M7_2"...
"M7_2" - 0 Error(s), 32 Warning(s).

只看该作者 · 2011-9-8 13:41

这些警告都源于嵌入汇编，感觉C51嵌入汇编不好用。

1万 · 2011-9-8 15:16

本帖最后由 ayb_ice 于 2011-9-8 15:28 编辑

如图设置即可

只看该作者 · 2011-9-8 15:23

不行啊！生不成目标文件。
Build target 'Target 1'
compiling M7_B2.C...
Target has no object modules
Target not created

只看该作者 · 2011-9-8 15:26

好了。刚才我把STARTUP.A51删掉了。

只看该作者 · 2011-9-8 15:27

谢谢8楼！

只看该作者 · 2011-9-8 17:09

坏了，又不行了。我怀疑刚才是不是真的好了，看错也有可能。

只看该作者 · 2011-9-8 18:31

本帖最后由 alicedodo 于 2011-9-8 18:34 编辑

9# chen3bing
LZ你在6楼贴出的警告都是提示C51编译器自带的库函数无法找到，不嵌入汇编时，编译器会将相应的库文件自动添加进来，但是使用了嵌入汇编以后就需要手动添加。

这是keil帮助文档中的库列表。

Library File Description
C51S.LIB Small model library without floating-point arithmetic.
C51FPS.LIB Small model floating-point arithmetic library.
C51C.LIB Compact model library without floating-point arithmetic.
C51FPC.LIB Compact model floating-point arithmetic library.
C51L.LIB Large model library without floating-point arithmetic.
C51FPL.LIB Large model floating-point arithmetic library.
80C751.LIB Library for the Philips 750/751/752 derivatives.

根据你设定的编译模式下选择对应的库文件到你的工程中来。
库文件的路径：..\keil\c51\lib
我看到你的警告中有
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL: ?C?FPMUL
MODULE: M7_B2.obj (M7_B2)
ADDRESS: 48CAH
所以要添加的是浮点库。

PS：还是把STARTUP.A51填上吧，保险

只看该作者 · 2011-9-8 18:45

谢谢！加了C51FPS.LIB。31个警告了。

只看该作者 · 2011-9-8 18:45

Build target 'Target 1'
assembling STARTUP.A51...
compiling M7_B2.C...
assembling M7_B2.src...
linking...
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C_START
MODULE:  STARTUP.obj (?C_STARTUP)
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C_START
MODULE:  STARTUP.obj (?C_STARTUP)
ADDRESS: 5968H
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C?IMUL
MODULE:  M7_B2.obj (M7_B2)
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C?CLDPTR
MODULE:  M7_B2.obj (M7_B2)
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C?CSTPTR
MODULE:  M7_B2.obj (M7_B2)
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C?CLDOPTR
MODULE:  M7_B2.obj (M7_B2)
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C?SLCMP
MODULE:  M7_B2.obj (M7_B2)
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?IMUL
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 55DFH
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?CLDPTR
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 561CH
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?CLDPTR
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 5644H
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?CSTPTR
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 5649H
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?IMUL
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 57BBH
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?CLDOPTR
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 57D8H
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?SLCMP
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 5541H
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?SLCMP
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 5565H
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C?LNEG
MODULE:  C:\Keil\C51\LIB\C51FPS.LIB (?C?FCAST)
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?LNEG
MODULE:  C:\Keil\C51\LIB\C51FPS.LIB (?C?FCAST)
ADDRESS: 4BE8H
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C?PLDIIDATA
MODULE:  C:\Keil\C51\LIB\C51FPS.LIB (PRINTF)
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C?CLDPTR
MODULE:  C:\Keil\C51\LIB\C51FPS.LIB (PRINTF)
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C?CSTPTR
MODULE:  C:\Keil\C51\LIB\C51FPS.LIB (PRINTF)
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C?CCASE
MODULE:  C:\Keil\C51\LIB\C51FPS.LIB (PRINTF)
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  _PUTCHAR
MODULE:  C:\Keil\C51\LIB\C51FPS.LIB (PRINTF)
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C?CLDOPTR
MODULE:  C:\Keil\C51\LIB\C51FPS.LIB (PRINTF)
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?PLDIIDATA
MODULE:  C:\Keil\C51\LIB\C51FPS.LIB (PRINTF)
ADDRESS: 4E0DH
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?CLDPTR
MODULE:  C:\Keil\C51\LIB\C51FPS.LIB (PRINTF)
ADDRESS: 4E10H
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?PLDIIDATA
MODULE:  C:\Keil\C51\LIB\C51FPS.LIB (PRINTF)
ADDRESS: 4E4BH
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?CSTPTR
MODULE:  C:\Keil\C51\LIB\C51FPS.LIB (PRINTF)
ADDRESS: 4E4FH
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  _PUTCHAR
MODULE:  C:\Keil\C51\LIB\C51FPS.LIB (PRINTF)
ADDRESS: 4E52H
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?CLDOPTR
MODULE:  C:\Keil\C51\LIB\C51FPS.LIB (PRINTF)
ADDRESS: 4F2EH
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?CLDPTR
MODULE:  C:\Keil\C51\LIB\C51FPS.LIB (PRINTF)
ADDRESS: 4F51H
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?CCASE
MODULE:  C:\Keil\C51\LIB\C51FPS.LIB (PRINTF)
ADDRESS: 5132H
Program Size: data=124.1 xdata=0 code=22892
creating hex file from "STC60S2"...
"STC60S2" - 0 Error(s), 31 Warning(s).

只看该作者 · 2011-9-8 18:55

我又加了C51BS.LIB，只剩8个警告了。
Build target 'Target 1'
assembling STARTUP.A51...
compiling M7_B2.C...
assembling M7_B2.src...
linking...
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C?CLDOPTR
MODULE:  M7_B2.obj (M7_B2)
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?CLDOPTR
MODULE:  M7_B2.obj (M7_B2)
ADDRESS: 592FH
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C?CLDOPTR
MODULE:  C:\Keil\C51\LIB\C51FPS.LIB (PRINTF)
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?CLDOPTR
MODULE:  C:\Keil\C51\LIB\C51FPS.LIB (PRINTF)
ADDRESS: 4FCFH
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C?CLDXPTR
MODULE:  C:\Keil\C51\LIB\C51BS.LIB (?C?CLDPTR)
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?CLDXPTR
MODULE:  C:\Keil\C51\LIB\C51BS.LIB (?C?CLDPTR)
ADDRESS: 4E14H
*** WARNING L1: UNRESOLVED EXTERNAL SYMBOL
SYMBOL:  ?C?CSTXPTR
MODULE:  C:\Keil\C51\LIB\C51BS.LIB (?C?CSTPTR)
*** WARNING L2: REFERENCE MADE TO UNRESOLVED EXTERNAL
SYMBOL:  ?C?CSTXPTR
MODULE:  C:\Keil\C51\LIB\C51BS.LIB (?C?CSTPTR)
ADDRESS: 4E2BH
Program Size: data=124.1 xdata=0 code=23263
creating hex file from "STC60S2"...
"STC60S2" - 0 Error(s), 8 Warning(s).
现在彩屏已经显示了。感谢alicedodo兄！