On 07.06.2013 12:29, JIA Pei wrote:
>
> To whom it may concern:
>
> I kept obtaining the following error message
> *error 2: Initializer element is not constant*
> while building the following code using *MCU8051IDE*, from Compiler
> configuration, *MCU8051IDE *adopts *--std-sdcc89* .
>
> */1) Code A/*
> */#include <reg51.h>/*
> */sbit RELAY = P1^4;/*
> */sbit K1 = P2^7;/*
> */
> /*
> */main()
> /*
> */{/*
> */ if (!K1) RELAY = 0;/*
> */ else RELAY = 1; /*
> */}/*
>
> Clearly, *sdcc89* is not *keil C*, which is fantastic ! However, it
> seems if I modify the above code and change it into
>
> */1) Code B/*
> */#include <reg51.h>/*
>
> */main()
> /*
> */{/*
> */sbit RELAY = P1^4;/*
> */sbit K1 = P2^7;/*
> */ if (!K1) RELAY = 0;/*
> */ else RELAY = 1; /*
> */}/*
>
> the above */code B/* can be successfully built. However, after I did
> *hex->bin* and flash the *.bin* file into my board, the board doesn't
> work at all. However, by building */code A/* and flashing the */.hex/*
> file using *PZ-ISP* under Windows, the board works fine.
>
>
> So, is there any suggestions by using sdcc?
> */How can I make the code both built and work successfully by compiling
> with sdcc?/*
Sorry, I cannot help you with your real problem, since I don't know much
about the mcs51 target. But the error messages seem consistent with the
C standard to me: Initializers for global variables need to be constant,
while there is no such requirement for local variables (unless the local
variables are static).
Philipp
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