setting a bit

TC

Hello all, I have been trying to find an easy way of setting one bit of a variable.
For example:
to read; Bit 15 = 0. To write, bit 15 = 1.

Thanks for your help

Mike Green

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

Wonderful, Thank You

TC

This will work great. I only have to set one bit.

Thank You

TC

This will work great. I only have to set one bit.

Thank You

JonnyMac

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)