Elmo HARSFEN0602, HARmonica Common, Line and Expression Termination, Line Continuation

HARSFEN0602ElmoHARmonicaSoftwareManual		PRELIMINARYDRAFT
	X=0;	Initialize
	for k=0:10	Iterate
	X = x + 1 ;	Do something
	end	End of iteration
	exit	End of program directive
	##Moo
	...	More code

The program defines two variables named x and k.

##Foo is an entry point.

After compilation, it is possible to run this piece of code by commanding XQ ##Foo to the interpreter.

When the program starts at ##Foo, it clears the user variable x. It then iterates 11 times, incrementing x with every iteration. Finally, x = 11.

The exit command terminates program execution.

Another code section can be executed by commanding XQ ##Moo.

Example 2:

29

switch (IP & 3)	Select according to the two low input bits
case 1
PR=1000;	If value is one...
case 2
PR=500;	If value is two ...
otherwise
PR=100;	Otherwise...(Last two bits are 0 or 3)
end
BG	Begin motion

This example moves an axis with a step that depends in the state of the digital inputs.

5.2Common

A user program contains lines of text code. This text must have defined syntax for the Compiler to recognize it. This section contains some common description of a program text.

5.2.1Line and Expression Termination

A line has the following terminators: carriage return, line feeds or their combination.

A line can contain a single expression or sequence of expressions. Sequence of expressions in the same line can be separated with semicolon or comma (not inside round or square parentheses).

Example:
a = 3	, b = 2	, c = a	+ b , ** This line consists of three expressions separated with comma
a = 3	; b = 2 ; c = a		+ b ; ** This line consists of three expressions separated with semicolon
a = 3 , b = 2		; c = a	+ b ** This line consists of three expressions separated with comma, semicolon and

terminated with line feed

[a,b] = foo (23, c, 3.14) ** In this expression comma is not expressions separator, because it is inside parentheses

5.2.2Line Continuation