Bit Test

Ryoshima

Is there anyway to do a bit test for a byte in spin?

Bobb Fwed

Something like this would work.

IF (val & |< 5)

This will return true if bit 5 is set.

Mike Green

You have to use the various bit operators. Here's an example:

CON bitNumber = 6
VAR byte testValue

PUB checkTheBit
   if testValue & |< bitNumber
      ' do something if the bit is a 1
   ifnot testValue & |< bitNumber
      ' do something if the bit is a 0

Note that this makes use of the Spin convention that a zero value is false and a non-zero value is true.

JonnyMac

I use this little method in some of my projects; it returns 0 or 1

pub bit_val(value, position)

  return (value & (1 << position)) >> position