bits.h

#ifndef STC15_BITSH
#define STC15_BITSH
/***************************************************************************************************
                                Macros for Bit Manipulation
 ****************************************************************************************************/
 
#define bit_shift_right(val, shift_size)                    (val >> shift_size)
#define bit_shift_left(val, shift_size)                     (val << shift_size)
#define bit_mask(bit_pos)                                   bit_shift_left(1, bit_pos)
 
#define bit_set(val, bit_mask_val)                          (val |= bit_mask_val)
#define bit_clr(val, bit_mask_val)                          (val &= bit_mask_val)
#define bit_tgl(val, bit_val)                               (val ^= bit_mask(bit_val))
#define get_bit(val, bit_val)                               (val & bit_mask(bit_val))
#define get_reg(val, bit_mask_val)                          (val & bit_mask_val)
 
#define set_bits(reg, val, pos)                             (reg |= bit_shift_left(val, pos))    
#define clr_bits(reg, val, pos)                             (reg &= ~bit_shift_left(val, pos)) 
 
#define test_if_bit_set(val, bit_mask_val)                  ((val & bit_mask_val) != 0)
#define test_if_bit_cleared(val, bit_mask_val)              ((val & bit_mask_val) == 0)
 
#define test_if_all_bits_set(val, bit_mask_val)             (get_reg(val, bit_mask_val) == bit_mask_val)
#define test_if_any_bit_set(val, bit_mask_val)              (get_reg(val, bit_mask_val) != 0)
 
/**************************************************************************************************/
 
 
/***************************************************************************************************
                           Definition of common Bit-Masks
 ***************************************************************************************************/
 
#define SBIT0            0x01
#define SBIT1            0x02
#define SBIT2            0x04
#define SBIT3            0x08
#define SBIT4            0x10
#define SBIT5            0x20
#define SBIT6            0x40
#define SBIT7            0x80
 
#define CBIT0            0xfe
#define CBIT1            0xfd
#define CBIT2            0xfb
#define CBIT3            0xf7
#define CBIT4            0xef
#define CBIT5            0xdf
#define CBIT6            0xbf
#define CBIT7            0x7f
 
 
/**************************************************************************************************/
#endif