[U-Boot-Users] printf question
Pantelis Antoniou
panto at intracom.gr
Wed Mar 24 09:18:58 CET 2004
Jerry Walden wrote:
> Okay - so this is probably not a big deal, however when I use the
> printf in u-boot as follows:
>
> unsigned char x = 0xC2;
>
> printf("this is the problem %02X\n", x);
>
>
> result is:
>
> this is the problem FFFFFFFC2
On most systems any datum of size less than int is
implicitly converted to int when passed to a varargs function
such as printf.
Char is typically signed so the conversion of any char with the 7
bit set will result in a negative integer.
0xC2 -> 0xFFFFFFFFC2.
To solve it just and with 0xFF.
Regards
Pantelis
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