﻿ NOT
 NOT

Action

This logical operator returns the inversed value.

Syntax

target =  NOT source2

Remarks

The NOT operator inverts the input bit. When the bit is '0' it will return a '1'. And when the bit is '1' it will return a '0'

 A R 0 1 1 0

The truth table above shows the possible values. A represent the input. R is the Return or output value.

While you can use NOT on bits, you can also perform the same operation on bytes, integers, etc. In such a case, all bits of the variables will be inverted.

Example :

Dim A as Byte, B as Byte, R as byte

A=&B1100_0001

R=NOT A

R=&B0011_1110

AND , XOR, OR

Example

'--------------------------------------------------------------------------------
'name                     : boolean.bas
'copyright                : (c) 1995-2016, MCS Electronics
'purpose                  : demo: AND, OR, XOR, NOT, BIT, SET, RESET and MOD
'suited for demo          : yes
'commercial add on needed : no
'use in simulator         : possible
'--------------------------------------------------------------------------------
'This very same program example can be used in the Help-files for
'      AND, OR, XOR, NOT, BIT, SET, RESET and MOD

\$baud = 19200
\$crystal = 8000000
\$regfile = "m88def.dat"

\$hwstack = 40
\$swstack = 20
\$framesize = 20

Dim A As Byte , B1 As Byte , C As Byte
Dim Aa As Bit , I As Integer

A = 5 : B1 = 3                                             ' assign values
C = A And B1                                               ' and a with b
Print "A And B1 = " ; C                                     ' print it: result = 1

C = A Or B1
Print "A Or B1 = " ; C                                     ' print it: result = 7

C = A Xor B1
Print "A Xor B1 = " ; C                                     ' print it: result = 6

A = 1
C = Not A
Print "c = Not A " ; C                                     ' print it: result = 254
C = C Mod 10
Print "C Mod 10 = " ; C                                     ' print it: result = 4

If Portb.1 = 1 Then                                         'test a bit from a PORT (which is not the same as testing the input state)
Print "Bit set"
Else
Print "Bit not set"
End If                                                     'result = Bit not set

Config Pinb.0 = Input : Portb.0 = 1                         'configure as input pin
Do
Loop Until Pinb.0 = 0                                       ' repeat this loop until the logic level becomes 0

Aa = 1                                                     'use this or ..
Set Aa                                                     'use the set statement
If Aa = 1 Then
Print "Bit set (aa=1)"
Else
Print "Bit not set(aa=0)"
End If                                                     'result = Bit set (aa=1)

Aa = 0                                                     'now try 0
Reset Aa                                                   'or use reset
If Aa = 1 Then
Print "Bit set (aa=1)"
Else
Print "Bit not set(aa=0)"
End If                                                     'result = Bit not set(aa=0)

C = 8                                                       'assign variable to &B0000_1000
Set C                                                       'use the set statement without specifying the bit
Print C                                                     'print it: result = 9 ; bit0 has been set

B1 = 255                                                   'assign variable
Reset B1.0                                                 'reset bit 0 of a byte variable
Print B1                                                   'print it: result = 254 = &B11111110

B1 = 8                                                     'assign variable to &B00001000
Set B1.7                                                   'set it
Print B1                                                   'print it: result = 9 = &B00001001
End