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Hi all, I defined some symbols in my assembly module. But I also need to use them in my C files. I don't want to define it twice at different places. How can I make those constants visible in C file? For example, I define a constant in .a66 like following, Kf_100_init equ 20133 What I want to do in a C file is, freq = tmp * Kf_100_init;
How can I make those constants visible in C file? I don't think you can do that at all. The problem is that C doesn't recognize the concept of a "constant" as a linkable object in the first place. I.e. there's no strict equivalent to assembler's "EQU" in C. You can have variables with the 'const' attributes whose value is not allowed to change, but you can't have actual constants with a name but no address, which are defined in another object module rather than being published in its header. There are two ways out of this: 1) Use a compile-time constant instead of linkable symbol. I.e. turn your EQU into a #define found in a header file #include'd by both the assembler and the C code. 2) Turn your constant from an integer into a pointer, i.e. the address of some non-existant object exported by the assembler. You may run into problems convincing the linker that this non-existant object doesn't interfere with real ones, though.
1) Use a compile-time constant instead of linkable symbol. I.e. turn your EQU into a #define found in a header file #include'd by both the assembler and the C code. Does assembler recognize '#define' statement? I will try it.
"Does assembler recognize '#define' statement? I will try it." Like I said originally: "I dunno about A166, but A51 can accept C51 header files. "Have a check in your A166 Manual to see if the same applies... "