/*These are the standard ANSI bit operation macros.  They are used by *//*microcontrollers that don't have special bit operation instructions.*/#define BIT(x)  (1 << (x))                  /*used by bit op macros   */#define BIT0 0x01                           /*used by bit op macros   */#define BIT1 0x02#define BIT2 0x04#define BIT3 0x08#define BIT4 0x10#define BIT5 0x20#define BIT6 0x40#define BIT7 0x80/* this macro sets a bit in the specified register or memory location */#define SETBIT(reg,bit) reg|=bit/* this macro clrs a bit in the specified register or memory location */#define CLRBIT(reg,bit) reg&=(~bit)/* this macro toggles a bit in the spec'd register or memory location */#define TGLBIT(reg,bit) reg^=bit/* this macro tests a bit, returning a non-zero val if bit is set *****/#define TSTBIT(reg,bit) (reg&bit)