Renesas TM V.3.20A Especificaciones descargar pdf (Pagina 260)

Renesas Technology, Tools FAQs

Document Number: 01051104_e

When I initialize the variables declared by char with Oxaa, I get the following warning, "constant out of range due to...". Why?

When signed/unsigned is not specified in the char type, char is assumed to be signed. Therefore, its value range is from -128 to 127

in decimal format. But, the 0xaa is 170 in decimal format, which is obviously out of the char range. Therefore, the compiler

generates codes that round down 0xaa to the char range, and loads -86 into the variable in decimal format.

To avoid this warning, you should either declare the variable as unsigned char, or modify the variable to fit within the char

declaration value range.

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Renesas TM V.3.20A Especificaciones Pagina 260