Galil DMC-2X00 用户手册
DMC-2X00
Chapter 7 Application Programming
y 97
Mathematical and Functional Expressions
Mathematical Operators
For manipulation of data, the DMC-2x00 provides the use of the following mathematical operators:
Operator Function
+ Addition
- Subtraction
* Multiplication
/ Division
&
Logical And (Bit-wise)
|
Logical Or (On some computers, a solid vertical line appears as a broken line)
() Parenthesis
The numeric range for addition, subtraction and multiplication operations is +/-2,147,483,647.9999.
The precision for division is 1/65,000.
The precision for division is 1/65,000.
Mathematical operations are executed from left to right. Calculations within parentheses have
precedence.
precedence.
speed=7.5*v1/2
The variable, speed, is equal to 7.5 multiplied by v1 and
divided by 2
divided by 2
count= count +2
The variable, count, is equal to the current value plus 2.
result=_TPA-(@COS[45]*40)
Puts the position of A - 28.28 in result. 40 * cosine of 45
°
is 28.28
temp=@IN[1]&@IN[2]
temp is equal to 1 only if Input 1 and Input 2 are high
Bit-Wise Operators
The mathematical operators & and | are bit-wise operators. The operator, &, is a Logical And. The
operator, |, is a Logical Or. These operators allow for bit-wise operations on any valid DMC-2x00
numeric operand, including variables, array elements, numeric values, functions, keywords and
arithmetic expressions. The bit-wise operators may also be used with strings. This is useful for
separating characters from an input string. When using the input command for string input, the input
variable will hold up to 6 characters. These characters are combined into a single value which is
represented as 32 bits of integer and 16 bits of fraction. Each ASCII character is represented as one
byte (8 bits), therefore the input variable can hold up to six characters. The first character of the string
will be placed in the top byte of the variable and the last character will be placed in the lowest
significant byte of the fraction. The characters can be individually separated by using bit-wise
operations as illustrated in the following example:
operator, |, is a Logical Or. These operators allow for bit-wise operations on any valid DMC-2x00
numeric operand, including variables, array elements, numeric values, functions, keywords and
arithmetic expressions. The bit-wise operators may also be used with strings. This is useful for
separating characters from an input string. When using the input command for string input, the input
variable will hold up to 6 characters. These characters are combined into a single value which is
represented as 32 bits of integer and 16 bits of fraction. Each ASCII character is represented as one
byte (8 bits), therefore the input variable can hold up to six characters. The first character of the string
will be placed in the top byte of the variable and the last character will be placed in the lowest
significant byte of the fraction. The characters can be individually separated by using bit-wise
operations as illustrated in the following example:
Instruction Interpretation
#TEST
Begin main program
IN "ENTER",len{S6}
Input character string of up to 6 characters into
variable ‘len’
variable ‘len’
flen=@FRAC[len]
Define variable ‘flen’ as fractional part of variable
‘len’
‘len’