Table of Contents
Bit and Byte Modifiers
A variable’s bits and bytes can be accessed individually by using the commands shown below:
Dim A As Integer A.LowByte = &H12 ' Store &H12 at A’s lowest byte
NOTE: These bit, nibble, and byte modifiers is not supported for the Single type, but are supported for the Integer and Long data types.
NOTE: These bit, nibble, and byte modifiers is not supported for the Ladder Logic sharing variable.
_D(10).byte0 ' No supported Dim A As Integer Dim B As Byte A = _D(10) B = A.byte0 ' Move it like this
Bit
| LOWBIT | Variable’s bit 0 |
| BIT0 to 31 | Variable’s bit 0 through 31 |
A.BIT2 = 1 ' Make bit 2 of A equal to 1.
Nibble
A nibble is 4 bits. The user can access individual nibbles to make processing certain data formats easier.
| LOWNIB | Variable’s NIBBLE 0 |
| NIB0 to 7 | Variable’s NIBBLE 0 to 7 |
A.NIB3 = 7 ' Store 7 in Nibble 3 of A
Byte
To access specific bytes of a variable, the following can be used.
| LOWBYTE, BYTE0 | BYTE 0 of Variable |
| BYTE1 | BYTE 1 of Variable |
| BYTE2 | BYTE 2 of Variable |
| BYTE3 | BYTE 3 of Variable |
A.Byte1 = &HAB 'Store &HAB in byte 1 of variable A
Word
To specify a certain Word of a variable, the following can be used: (A Word is 16 bits)
| LOWWORD, WORD0 | Word 0 of variable |
| WORD1 | Word 1 of variable |
A.Word1 = &HABCD Store &HABCD in word 1 of variable A
* Tip: Need to access 5 bits of a variable?
NewVariable = Variable AND 0x1F.
This will mask the last 5 bits of the variable.
Expressing Numbers
There are three possible ways to represent numbers in Cubloc BASIC: binary, decimal and hexadecimal. The binary and hexadecimal representations are useful when interfacing to digital devices. The decimal representation is the standard human readable format.
Examples:
Binary : &B10001010, &B10101,0b1001001, 0b1100
Decimal : 10, 20, 32, 1234
Hexadecimal : &HA, &H1234, &HABCD,
0xABCD, 0x1234 <-- Similar to C