Change the function's declared type to "const unsigned char *bitmap"

On Saturday, September 15, 2018, Neil <picdude3@narwani.org> wrote:

> Hi all,
>
> I've got bitmaps defined using const (to store it in program memory) in
> my PIC32 code as...
> const unsigned char Logo1Bitmap[312] =3D
> {
>      0x00, 0x00, 0x1F, 0xFF, 0xFF, 0xFF, 0xF0,
>      0x00, 0x07, 0xFF, 0xFF, 0xFF, 0xFF, 0xF0,
>      ...
> }
>
>
> I also have this function...
> void DrawBitmap(signed short XPos, signed short YPos, signed short
> width, signed short height, unsigned char *bitmap, unsigned short color);
>
>
> When I pass the bitmap to the function like this...
>        DrawBitmap(85, 28, 52, 42, Logo1Bitmap, 0x7BEF);
>
>
> I get warning messages like this...
> warning: passing argument 5 of 'DrawBitmap' discards 'const' qualifier
> from pointer target type [enabled by default]
>         DrawBitmap(85, 28, 52, 42, Logo1Bitmap, 0x7BEF);
>
> The only way I can get the warning to go away is to do this...
>         DrawBitmap(85, 28, 52, 42, (unsigned char *)&Logo1Bitmap[0],
> 0x7BEF);
>
>
> It works properly either way, but I'm unclear what it thinks I'm doing
> wrong.  And what's the right way to do this?
>
> Cheers,
> -Neil.
>
>
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--=20
Jason White
--=20
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