Having problems with M118 and variables

[fcwilt]

Hi,

Given this bit of code:

var ABC = "ABC"
M118 S{var.ABC}
M118 S{var.ABC} ^ "XYZ"
M118 S"XYZ" ^ {var.ABC}

The 1st M118 displays "ABC" as expected
The 2nd M118 displays "ABCXYZ" as expected
The 3rd M118 displays just "XYZ"

In my actual code the variable follows the literal. What am I doing wrong?

Thanks.

Frederick

[dc42]

@fcwilt that's expected. If you want to use an expression as the value of a parameter in a G-or M-command then the entire expression must be enclosed in { }. See https://docs.duet3d.com/en/User_manual/Reference/Gcode_meta_commands#use-of-expressions-within-gcode-commands.

[fcwilt]

@dc42

Thanks.

Given...

var ABC = "ABC"
var DEF = "DEF"

... why do these work?

M118 S{var.ABC} ^ "XYZ"

M118 S{var.ABC} ^ {var.DEF}

[dc42]

@fcwilt it's not intended that those two will work. They may not work in future firmware versions.

[fcwilt]

@dc42

Thanks.

Understood.

Frederick