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lookup table in code segment

Abel Pan

Hi there,
I had a font bitmap table which is 1088 bytes. The Ram in chip is not big enough. So I am thinking to put it in code segment. My questions are
How do I do it in C and
If the lut were in code segment, how can i access it?
I am using 89c51rd and c51 compiler.
Thanks

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    Declare your font bitmap as living in the "code" memory space, e.g.

    const U8 code bitmap[] = { 1, 2, 3, 4 };

    The compiler will take care of accessing the variable via the MOVC instruction to access the code memory space through the DPTR instead of MOVX for external data.

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  • 0

    Declare your font bitmap as living in the "code" memory space, e.g.

    const U8 code bitmap[] = { 1, 2, 3, 4 };

    The compiler will take care of accessing the variable via the MOVC instruction to access the code memory space through the DPTR instead of MOVX for external data.

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