* .asm中的地址未在* .c中使用

Hiu根本不使用这种地址定义，它只适用于“绝对”程序集。为了有一个混合的“C”ANSD“ASM”程序，你的“ASM”代码必须是可重新定位的类型，因此链接器可以加入所有的片段。在其中一个模块中定义它们，并在其他模块上声明它们为外部。



      以下为原文

    Hi
 
You simply don't use that kind of address definition, its only for "absolute" assembly.
 
In order to have a mixed "C" ansd "ASM" program your "ASM" code must be of the relocatable type so the linker can join all the pieces.
 
To share variables between different source modules ("C" or "ASM") you must define them in one of the modules, and declare them as external on the other modules.
 
 
HIH
 
Best regards
Jorge
 

在您的程序集文件中，这样做：注意领先的下划线。



      以下为原文

   
In your assembly file, do this:
global _counter
; ...
banksel _counter
movwf _counter

Notice the leading underscore.
 

“您必须在其中一个模块中定义它们，并将它们声明为其他模块上的外部”——我可以仅在ASM中定义它，而不在C中使用它吗？或者我需要在C中定义它，虽然我不会在C中使用它吗？我不想创建一个共享变量，只需要在ASM中使用一个地址。正如我所知道的，“计数器＝0x20”不分配任何空间，它只是在编译前用一个数字替换这个字。



      以下为原文

    "you must define them in one of the modules, and declare them as external on the other modules" - can I define it only in ASM and not use it in C at all? Or do I need to define it in C although I won't be using it in C? I don't want to create a shared variable, just to use an address in ASM. As I know, "COUNTER equ 0x20" doesn't allocate any space, it just replaces the word by a number before compilation.
 

谢谢。我想知道这两种方法是否正确：1）在C：无符号字符计数器；在ASM:Global O-RAD2中：无符号char A（32）@ 0x20；在AS:StasyOfFixSoC 0x20（有时我只使用一个字节，我不需要知道地址），但有时我需要一个数组，我和BETW共享这个地址。EN C和ASM）



      以下为原文

    Thanks. I would like to know if both ways are correct:
 
1)
In C:
unsigned char counter;
In ASM:
global _counter
 
2)
In C:
unsigned char a[32] @ 0x20;
In ASM:
start_of_array equ 0x20
 
(Sometimes I use just one byte for which I don't need to know the address, but sometimes I need the address for an array that I share between C and ASM.)