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Hello together,
I'm coding a simple UART-Application on the MCBSTM32 eval board and have problems with the preprocessor directives. I studied the whole documentation here and I'm pretty sure I'm coding in a common way, but still I can't compile my program. These are the very first lines of my main header file:
#ifndef ___MAIN_H_ #define ___MAIN_H_ #endif #undef EX #ifndef ___MAIN_C_ #define EX extern #else #define EX #endif
And my variables a coded that way:
EX unsigned int ui_TxFrameCounter;
When compiling the program, I get the error code "L6200E: symbol multiply defined" for my variables, because of including the header to other files. I want to declare the variables "extern" for the other header files. Could somebody help me? Would be nice. Geetings
If you still want to pursue the preprocessor business, the first thing to do is to examine the preprocessor output - see Andy's Handy Hint for Debugging Preprocessor Problems here: www.8052.com/.../read.phtml (it is not specific to 8052).