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C COMPILER->Compiler Data Formats->bit fields

The compiler supports bitfield of type unsigned char, char, unsigned int, int, unsigned long and long.

The bitfields are packed in accordance with conventional bit positions.  For example:
    
struct tag {
    unsigned char b1 : 1
    unsigned char b2 : 3
    unsigned char b3 : 4
} S;

S will be an 8 bit wide object.

• the single bit bitfield S.b1 will be located at bit position 0 of S
  
• the three bit bitfield S.b2 will be located at bit positions 1 to 3 of S
  
• the four bit bitfield S.b3 will be located at bit positions 4 to 7 of S