setting a bit

Comments

• Mike Green Posts: 23,101

  2013-04-20 14:04 edited 2013-04-20 14:04

  variable |= |< bitNumber ' this sets a bit
  
  variable &= ! |< bitNumber ' this clears a bit
  
  There are longer solutions when you want to change several bits, but these are the most compact single bit methods.
• TC Posts: 1,019

  2013-04-20 14:08 edited 2013-04-20 14:08

  Wonderful, Thank You
• TC Posts: 1,019

  2013-04-20 14:10 edited 2013-04-20 14:10

  This will work great. I only have to set one bit.
  
  Thank You
• TC Posts: 1,019

  2013-04-20 14:10 edited 2013-04-20 14:10

  This will work great. I only have to set one bit.
  
  Thank You
• JonnyMac Posts: 9,556

  2013-04-20 19:19 edited 2013-04-20 19:19

  In my standard template I have these methods:
  

  pub rd_bit(target, pos)
  
  '' returns bit value (0..1) of target.pos
  
    if ((pos => 0) and (pos =< 31))
      return (target >> pos) & 1
    else
      return 0
  
  
  pub wr_bit(target, pos, value)
  
  '' writes value.0 to target.pos
  
    if (value & 1)
      return target | (1 << pos)
    else
      return target & !(1 << pos)
  
  
  pub toggle_bit(target, pos)
  
  '' toggles target.pos
  
    return target ^ (1 << pos)